274 results about "Petrol engine" patented technology

The invention provides a work system of an electronically controlled gasoline engine, comprising an air intake system, a fuel oil supply system, an ignition system as well as an electronic control system; the electronic control system consists of a sensor section, an electronic control unit ECU and an actuator section, wherein, the sensor section includes a throttle position sensor, an intake pressure and temperature sensor and an intake temperature sensor which are arranged on an intake pipe of an intake system, a camshaft position sensor, a coolant temperature sensor and a crankshaft position sensor which are arranged on the engine, a front oxygen sensor arranged in front of a three-way catalyst converter on an exhaust pipe of the engine, and the components of the sensor section are all connected with the ECU, and the actuator section consists of an electric fuel pump, an oil sprayer, an idle speed regulating valve and an ignition coil; the components of the actuator section are all connected with the ECU, and the ECU includes a fuel injection control program, an ignition control program and an idle speed control program; the system adopts reasonable control strategy and has comprehensive control function, good integrated performance of control function and fine system portability.

The invention discloses a petrol engine spark ignition excite homogeneous compression ignition combustion control method which belongs to the technical field of internal combustion engines. In the control method, an ignition advance angle is used for controlling ignition moments, and a combustion rate is controlled by an EGR rate. The petrol engine spark ignition excite homogeneous compression ignition combustion control method comprises the following steps: spraying fuel firstly in an air inlet process to form homogeneous rarefied mixed gas when an upper dead center is compressed; spraying fuel secondly in a compression stroke to form local thicker mixed gas around a spark plug; igniting the local thicker mixed gas to produce flame propagation by the spark plug; releasing heat by the combustion of the local flame propagation; compressing the around large-area rarefied mixed gas to rise temperature and pressure to a self-ignite flammation state, thereby exciting the mixed gas in a whole cylinder to self-ignite in a large area in a multipoint mode, and quickly and completely burning the whole mixed gas; and otherwise, harmful emissions generated by burning the equivalent proportion mixed gas are effectively controlled by using a three-way catalyst of the traditional petrol engine.

The invention discloses a method for casting disappear mould of the cover of diesel engine and petrol engine that based on disappear mould technique, which can solve the problems of present sand casting technique with high material consumption, heavy cast, and environment pollution, etc. The invention slices matter into several mould plates to prepare the mould; than filling the material of disappear mould into mould to attain the mould plate of disappear mould which is the same with said matter; dipping disappear mould dope on the mould plate and arranging it into sand tank to be vibrated and poured to melt mould plate into carbon monoxide and carbon dioxide to be discharged to attain the cast of said matter. The invention has the advantages that save raw material, reduce labor intensity and improve property.

The present invention comprises an input drive system, which provides a plurality of phases of oscillating fluid flow, and an output drive system connected directly to the input drive system that is powered by the plurality of phases of oscillating fluid flow. The input drive system comprises a plurality of pistons that are caused to move in a reciprocating fashion by a power source. The power source may be a rotating power source, such as that provided by an electric motor, a diesel or petrol engine, or a turbine system. The input drive system comprises a cam ring attached to a rotating power source, a plurality of cam rollers in contact with the cam ring; and a plurality of pistons attached to the cam rings. The output drive system comprises one or more pistons that are attached to move in a reciprocating fashion by the oscillating fluid flow provided by the input drive system. The output drive system comprises a cam ring attached to a load, a plurality of cam rollers in contact with the cam ring, and a plurality of pistons attached to the cam rings.

The invention relates to a uniform compression-ignition and splash ignition petrol engine burning information online detector, wherein it uses splash plug ion current to online detect the uniform compression-ignition state, to realize closed control of dual-mode burning. The invention is characterized in that: high-pressure ignition coil is serially connected to two one-way connectors, direct-current power module and detecting resistance; the splash plug is connected between two one-way connectors; the signal processing module is parallel connected to two ends of detecting resistance; the signal processing module processes the signal of detecting resistance to obtain one group of ion current character signal relative to burning; and it uses dynamic recursive program to obtain burning phase, instruction average effective pressure and mixing heating rate character value. The invention is characterized in that: it uses the ion current generated by splash plug, calculates the online internal burning phase, load, mixing heating rate character value and abnormal burning parameter, to directly support feedback information for the smooth transition between two burning modes.

The invention discloses an apparatus for testing work ability of an activated carbon canister used for a vehicle. The apparatus comprises an activated carbon canister, a collector, electronic balances, solenoid valves, an adsorption flow sensor, a desorption flow sensor, an adsorption flow control valve, a desorption flow control valve, a vacuum pump, a dehumidifier, an air pressurizer tank and a computer measurement and control system. The apparatus provided in the invention totally accords with the national standard HBC32-2004 Technical Requirement for Environmental Protection Product-Control System (Device) of Fuel Evaporative Pollutants from Vehicle with Petrol Engine, has high test precision and a high automation degree, and is applicable to research on work ability of activated carbon canisters used for vehicles in institutions like research institutions, automobile detection and environmental protection departments, etc.

A gasoline engine variable valve timing mechanism, which includes a camshaft, the camshaft is provided with a plurality of cams, the camshaft is also provided with a driven disc and a driving wheel in sequence, and the driven disc is provided with a cam Correspondingly, there is an arc-shaped groove on the drive wheel, and the convex column is inserted into the arc-shaped groove and can slide in the arc-shaped groove, so that the driven plate can be displaced relative to the drive wheel; two centrifugal blocks are arranged on the outside of the drive wheel , the centrifugal block is a sheet-shaped body, and its edge contour is an irregular curve. The positioning hole is set on the centrifugal block, which is correspondingly set on the fixed column of the driving wheel. The two ends of the two centrifugal blocks are respectively connected end to end by elastic elements. A sliding groove is provided on the block, and the boss on the driven plate is inserted into the sliding groove through the driving wheel and can slide in the sliding groove. The variable valve phase mechanism provided by the present invention saves complicated and expensive components such as the existing ECU, solenoid valves and multiple sensors, and the overall mechanism has simple structure, few parts, easy processing and low cost.

The invention provides a bait casting machine for cage culture, wherein the machine is equipped with a diesel engine or petrol engine water pump, which is connected with a triple valve, one path of the triple valve is connected with the bait bin through a flushing control valve and flushing pipes, the bait bin is in communication with the mixing chamber through the blanking tube, the blanking tube is equipped with a blanking control valve on the outside, the other path is connected with a bait throwing flexible pipe through the mixing chamber, the one end of which is equipped with a blow head, one end of the angle controller is connected with the outer wall of the bait bin, the other end is connected with the bait throwing flexible pipe. The invention solves the problem of absent power supply of the deep water net cages.

The invention discloses a variable amplitude spraying machine. The spraying machine comprises a handcart with travelling wheels, a liquid medicine tank, a petrol engine, a water pump, a vertical bracket, a horizontal bracket, spraying devices, a lifting device and recycling devices, wherein the liquid medicine tank, petrol engine and water pump are arranged on the chassis of the handcart, the vertical bracket is arranged on the front end of the handcart, the horizontal bracket is connected with the vertical bracket through a slider, the horizontal bracket is connected with a plurality of spraying devices and recycling devices, the spraying devices and the recycling devices are arranged symmetrically, the horizontal strut in the middle of each two adjacent spraying devices is provided with a hollow conical spray head, and the lifting device is connected with the horizontal strut. The spraying machine of the invention can be adjusted according to the height and line spacing of grapes or other corps growing on trellis, and collect the liquid medicine which can not hit grapes and blow in air and filtrate the collected liquid medicine for reuse so as to increase the utilization of the pesticides and reduce the damage of chemical pesticides to the personnel safety of operators and the environmental pollution.

The invention relates to a method for preparing Pd-only catalyst used for tail gas purification of universal minitype petrol engines and belongs to the technical field of tail gas catalysis purification of universal minitype petrol engines. The Pd-only catalyst only contains noble metal Pd and does not contain noble metal Pt or Rh with the cost far higher than that of Pd, so that the cost of tail gas purification catalyst for universal minitype petrol engines can be reduced; a metal carrier is pre-treated through roasting at the relatively low temperature of 400 to 700 DEG C, pseudo-boehmite binding agent is added in coating slurry, and a bonding layer not containing noble metal or oxygen storage material does not need to be applied in advance, but a catalysis coating containing noble metal is applied on the metal carrier directly, so that the preparation technology of the tail gas purification catalyst for universal minitype petrol engines can be simplified; and cerium-rich tombarthite oxygen storage material and alumina material with high specific surface area are added in the coating, so that the activity and the durability of the Pd-only catalyst for tail gas purification of universal minitype petrol engines can be improved, the consumption of Pd can be reduced, and a universal minitype petrol engine with the Pd-only catalyst provided by the invention can satisfy the requirements of emission regulations.

A water-spray device for use in the cylinder of four-stroke gasoline engine, which comprises electric control unit, water tank, water pump controlled by the electric unit, water track and water-spray nozzle. The water-outlet of the water pump connects with the water-inlet of the water track by a water tube. The water-spray nozzle communicates respectively with the water-outlet of the water track, water tank and the water pump by water tube, the water-spray mouth of the water-spray nozzle is inserted into the combustion chamber of the gasoline engine. Advantages: water is sprayed in the cylinder at some stage of combustion stroke of engine, the temperature is controlled above combustion point of gasoline so as not to effect gasoline to continuous combust; water is gasified instantaneously to increase cylinder pressure so as to increase effective torque and power output; water is gasified to apply work to consume large amount of heat energy so as to reduce the load and power consumption of lubrication system; the temperature in cylinder is reduced so as to reduce burst risk and gasoline engine can use higher compression ratio to economize gasoline; the reduced combustion temperature in cylinder can inhibit the generation of oxynitride so as to reduce the exhaust of harmful matter to benefit environment protection.

The invention discloses a method for controlling air-fuel ratio of instantaneous condition of an electric controlled gasoline engine; the method comprises the following steps of: controlling of synchronous and asynchronous enriching of transient working condition of the electric controlled gasoline engine, intake pressure prediction method and closed loop controlling of transient working condition; the transient working condition comprises the following steps of: controlling the step of synchronous and asynchronous enriching, intake pressure prediction step, and closed loop controlling step of transient working condition; the common characteristic of the three methods is that precise control of air-fuel ratio is realized in the control process of the whole transient working condition; according to different working conditions, the enriching mode is selected automatically, thus guaranteeing control precision of the response speed of the acceleration process and the air-fuel ratio of the acceleration process furthest; in the instantaneous transient working condition, an oxygen sensor signal is used fully so as to modify the error of enrichment or desaturation furthest, thus improving economy and emission of engines.

The invention relates to a lawn leaf sweeper. A hand-propelled walking mode is adopted; when a front wheel of the sweeper rotates, a drum in front of the sweeper is driven to rotate through chain transmission, the drum drives a rake rolling needle on the drum to rake leaves, the leaves are pushed into a suction port along a lower housing plate of the drum, and rake teeth at the suction port rake the leaves into a collecting box; leaf collecting power is mainly supplied by a petrol engine; the petrol engine drives an impeller to rotate through a belt; the leaves are absorbed into the collecting box under the action of negative pressure produced by the rotation of the impeller; and after the collecting box is filled with leaves, the leaves automatically enter a detachable movable collecting box which is connected to the back of the collecting box under the action of the impeller power, so that leaf collection is completed. In the sweeper, more human-friendly treatment is adopted, the rotating speed of the drum is increased according to the walking speed of a person, and power needed by the impeller for absorbing the leaves, namely the power of the petrol engine is calculated according to a walking distance, so that the labor of cleaning workers is reduced while time saving and high efficiency are ensured.

The invention discloses a petrol engine supercharger bypass valve which comprises a bypass valve (3) and a rocking arm (2), wherein a valve connecting lug boss (9) is arranged on the bypass valve (3);the valve connecting lug boss (9) and the bypass valve (3) are in an integral structure; the end part of the rocking arm (2) is bent and pressed into a flat shape; a rocking arm connecting hole (10)is arranged on the flat shape structure; and the bypass valve (3) is connected with the rocking arm (2) by the match of the valve connecting lug boss (9) and the rocking arm connecting hole (10). Therocking arm and the bypass valve are formed by the precision casting of a novel stainless steel material melting die, and a spacer is formed by stamping novel stainless steel, therefore, the creep resistance at high temperature is ensured, the planeness of a volute attaching surface and the utilization of the supercharger on waste gas energy when an engine is at low speed are improved, the rotating freedom degree of the bypass valve is limited, the valve is prevented from generating free rotation by waste gas disturbance, the abrasion is reduced and the requirement for a high-performance petrol engine is met.

The invention discloses a single-power driven double-generator set using an electric injection system. The double-generator set comprises a generator back cover, a left cooling fan, a left generator, a left wind scooper, an engine, a right generator, a right cooling fan and a right wind scooper, wherein the left generator comprises a left generator rotor and a left generator stator; the engine comprises a main shaft and an engine end cover; the right generator comprises a right generator stator and a right generator rotor; the left wind scooper is fixed on the engine end cover; the left generator stator is fixed on the left wind scooper and positioned in the left generator rotor; the left cooling fan is positioned between the left generator rotor and the generator back cover; the right generator stator is positioned in the right generator rotor; the right cooling fan is fixed on the main shaft through the right generator rotor; and the right generator and the right cooling fan are positioned in the right wind scooper. On the premise of not changing the main structure of a petrol engine, the double-generator set conveniently realizes the replacement of the conventional mechanically-controlled fuel control system by using an electronic control fuel injection device.

The invention relates to reciprocating bamboo-root digger applied to digging remained bamboo-root after hewing, comprising a bracket, the upper part of the bracket is fixedly provided with a petrol engine with a clutch, the lower part of the bracket is fixedly provided with a vertical shoot which is provided with an upper slipper block and a lower slipper block connected by a damping spring. The take-off drive shaft of the petrol engine and the crank end of a connecting rod are connected; the connecting end of the connecting rod is hinged with the upper slipper block in the shoot; a digging head is connected with the lower slipper block and the top end of the bracket fixes a handle that is provided with a throttle of the petrol engine for handle adjusting. The invention makes use of connecting rod to drive the slipper block, the digger is driven to do up and down reciprocating to dig bamboo-root. The invention has light complete weight and simple operation, which is applicable to be operated by single man and reduces labor strength due to the anti-vibration design of the complete machine. Besides, the invention not only improves labor efficiency, but also guarantees the completeness of bamboo-root.

The invention relates to a rotational processor which uses metal as carrier to purify the tail gas of diesel engine and petrol engine. Wherein, it is formed by a frame, a rotational metal carrier, an airflow swirler and a baffle; the front and back ends of frame (1) have inlet cover (3) and outlet cover (13); the inlet cover (3) has an inlet connecting tube (2); the outlet cover (13) has an outlet connecting tube (14); the frame (1) is connected at the middle of ventilate tube of engine via the inlet connecting tube (2) and the outlet connecting tube (14), to form a sealed catalysis reactor space; the rotational metal carrier is divided into the catalysis first level and the catalysis second level (15), while the first level comprises the first catalysis crinkle band (5), and the second level (15) comprises the second catalysis crinkle band and the third catalysis crinkle band (11). The invention has high catalytic efficiency.

The invention relates to a petrol engine with turbo charging, which comprises a cylinder body, a cylinder sleeve, an intake valve, a spark plug hole, an exhaust valve, a combustion chamber, a crankshaft, a connecting rod, a piston, an intake manifold, an exhaust manifold and a turbo charging device. The petrol engine also comprises a twin cam shaft valve timing adjusting structure arranged above a cylinder head; the twin cam shaft valve timing adjusting structure ensures that an admission cam shaft and an exhaust cam shaft is in transmission connection with the crankshaft through a timing chain; and the twin cam shaft valve timing adjusting structure is used for continuously and changeably adjusting the opening times of the intake valve and the exhaust valve of the combustion chamber, therefore, the fuel utilization and the rotation speed and the output power of the engine can be improved. The turbo charging device can increase the intake pressure of the engine, and quicken the combustion of the fuel of the engine, so as to enable the combustion to be more sufficient, therefore, the output power of the engine is improved, and the exhaust emissions are reduced. A three-way catalysis device is arranged on the exhaust manifold, therefore, the harmful gas emissions can be reduced.

The invention discloses a method and a device for controlling idle speed of a petrol engine and rotational speed of a small accelerator. The device comprises an engine body, an electric control unit (ECU), a fuel injection device, an ignition device, a restrictor body and the like. The device is characterized in that: the restrictor body has nonadjustable and large enough idle speed air inlet quantity at an idle speed position; the electric control unit controls the ignition device; and the idle speed or a preset target rotational speed reached by the rotational speed of the small acceleratoris fed back and controlled through great adjustment of an ignition advance angle. The method comprises the following steps of: 1) judging a compressed expansion process or an intake / exhaust process at present; 2) giving an ignition signal in the compressed expansion process, and avoiding giving the ignition signal in the intake / exhaust process; and 3) determining the ignition advance angle according to a difference between the current measured rotational speed of the engine and the target rotational speed and a basic ignition angle.

The ignition petrol engine combustion system applied high constringent ratio and high fuel ratio, multiple hole sprayer installed in the main combustor spout accessorial oil beam into the precombustion chamber formed hyper concentration mix air, while the main oil beam only forms into dilute mix air in the main combustor, through high constringent ratio is applied. The total fuel ratio is still very high. To ensure the ignition, the economy of the motor and ventilate contamination are improved.

The invention relates to a novel inlet channel of a gasoline engine, and the flat inlet channel is extended to a valve in the oblique direction. Because of the inlet channel has a flat shape, under the circumstance that flow coefficient is larger, airflow receives smaller flow resistance in the inlet channel. The shape of the inlet channel provided reduces the flow resistance, and the flow coefficient of the inlet channel can meet the requirement of an in-cylinder direct-injection engine.

The invention relates to a catalyst for the oxidation of carbon monoxide (CO) at low temperatures, which is a catalytically active composition based on platinum and cobalt. The catalyst can be used in the removal of CO from hydrogen-rich gas for fuel cell technology in order to avoid poisoning of the electrodes with CO. Further fields of application relate to the automobile sector, in particular the effective removal of CO during cold starting of a diesel or petrol engine and also air purification systems for quality control of air in interior spaces, e.g., removal of CO in a tunnel, an underground railway, multistory car parks or submarines.

The invention discloses a petrol engine power surfboard with an improved structure. Surfboard advancing direction serves as the reference; the inner part of a surfboard body forms a hollow cavity which is provided with an opening on the surfboard body; a power unit is contained in the hollow cavity; a front cover plate is detachably and fixedly covered on the hollow cavity; the core part of the power unit is a petrol engine; the core part of a boost unit is a boost pump comprising a propeller and a transmission shaft; the power output end of the power unit is connected with the transmission shaft of the boost pump; a control unit controls power unit output power and surfboard advancing direction; the propeller is fixedly sheathed on the transmission shaft; and a guide plate is fixed in the rear end of the pump case. The embodiment can jet flow in a straight line, thus improving thrust; the invention only needs to bear resistance borne by the surfboard body in water so as to improve navigational speed, so that the surfboard not only ensures that a sporter can enjoy surfing on calm water, but also has beautiful appearance.

The present invention comprises an input drive system, which provides a plurality of phases of oscillating fluid flow, and an output drive system connected directly to the input drive system that is powered by the plurality of phases of oscillating fluid flow. The input drive system comprises a plurality of pistons that are caused to move in a reciprocating fashion by a power source. The power source may be a rotating power source, such as that provided by an electric motor, a diesel or petrol engine, or a turbine system. The input drive system comprises a cam ring attached to a rotating power source; a plurality of cam rollers in contact with the cam ring; and a plurality of pistons attached to the cam rings. The output drive system comprises one or more pistons that are caused to move in a reciprocating fashion by the oscillating fluid flow provided by the input drive system. The output drive system comprises a cam ring attached to a load; a plurality of cam rollers in contact with the cam ring; and a plurality of pistons attached to the cam rings.

The invention relates to energy conservation and emission reduction, and belongs to a petrol engine for turbulence reversing emission reducing of a logarithmic differentiation isogonal line skirt edge of a piston skirt. In order to pursue scientific exploration, various improvements of spark plugs, such as adding internal inductive reactance in various fixed electrodes, changing external division couplers, adding casing cooling fins and adding movable and micro-motion electrodes, are provided; the assortment of combustion chambers including a function wave combustion chamber and a function wave combustion chamber with a parabolic convex-concave adapter and various ignition devices is also provided; a double-auxiliary skirt edge is added at the piston skirt; and scavenging air duct openings of a cylinder body are provided, are symmetrically provided with two tapered wedge turbulence reversing pieces (46) on left and right sides, and comprise scavenging air duct openings (47) of the tapered wedge turbulence reversing pieces, tapered wedges (48) leading to the scavenging air duct openings of the tapered wedge turbulence reversing pieces, reversing grates (49) leading to the scavenging air duct openings of the tapered wedge turbulence reversing pieces, and turbulence shields (50) leading to the scavenging air duct openings of the tapered wedge turbulence reversing pieces, so turbulence at the scavenging air duct openings can be conveniently produced to block the reversing of waste gas, and the discharge value can be conveniently reduced to reach the standard. The petrol engine has the benefits that the petrol engine is beneficial to helping guide, emission and noise reduction, and lubricating and heat dissipation, ignition is reliable, and the efficiency is improved.

The invention relates to a self-propelled lawn pruning device, and belongs to the technical field of agricultural machines. The device comprises a rack, a pruning part, an adjusting part, a transmission part and a propelling part; the adjusting part is fixed above the rack, the pruning part is fixed to the front end of the adjusting part, the transmission part is installed on the adjusting part, and the propelling part is fixed to the two sides below the rack. The device is used for automatically pruning lawns of large-size sites such as golf courses, football fields and sports fields. The device is powered by a storage battery, and controlled to be propelled through a self-propelled identification probe and a controller; through the adjusting part and the transmission part, adjusting of the needed pruning height and pruning angle is driven; through a miniature petrol engine, a reciprocating cutter is driven to conduct pruning work. The device replaces traditional manual labor, omits tedious and boring working processes for workers, and has higher efficiency, a better operation effect and wide application prospects.

The invention discloses a vaned petrol engine which comprises a stator, a rotor, a vent hole, an air inlet, an electrically controlled gasoline nozzle and a spark plug. The cross section of the inner cavity of the stator is elliptic; the axes of the rotor and the stator are overlapped; the cross section of the rotor is round; at least 8 troughs are uniformly arranged on the surrounding body of the rotor along the circumference direction; vanes are arranged in the troughs; under the rotating state of the rotor, the top ends of the vanes are contacted with the inner wall of the stator; two sides of the vanes and two ends of the rotor are respectively contacted with two ends of the stator to form sealed air chambers, the number of which is equal to that of the troughs; the vent hole is arranged at the left upper area of the stator; the air inlet is arranged at the right upper area of the stator; moreover, the electrically controlled gasoline nozzle and the spark plug are arranged at the left lower area of the stator. The vaned petrol engine can reduce the size of the rotor, is convenient to replace the vanes, reduces the production and running cost, runs smoothly, is hard to damage spare parts, has long service life, improves the thermo-motive efficiency, and can be manufactured into a high-power engine.

The invention relates to an exhaust catalyst of gasoline engines using ethanol fuel and a preparation method thereof. The catalyst is composed of 50%-70% CeO2, 20%-30% ZrO2 and 1%-20% transition metal. Sol-gel method or coprecipitation method is used to prepare the transition metal (Mn, Fe, Co, Ni or Cu) doped Ceria / Zirconia solid solution catalyst. The exhaust catalyst prepares the solid solution by adding the transition metal in the Ce-based materials, which greatly improves the heat stability and low-temperature activity of the Ce-based materials and increases the catalytic performance. The exhaust catalyst of the invention is used for cleaning the exhaust of the gasoline engines using ethanol fuel, has high removal efficiency, and also has the advantages of simple preparation, low cost and high activity.

The invention provides an automobile engine which does not use oil fuel and achieve the performance of the petrol engines such as large power, little pollution, simple technique, low cost, and long service life. The engine of the invention comprises a fuel system, an air system, a combustion chamber, a power machine, a water supply system and an electric control system. The fuel system and air system respectively transmit fuels and air to the combustion chamber; the fuels in the combustion chamber burn to generate high-pressure fuel gas which pushes energy carrying fluid into the power machine which does work outwards. The fuels of the automobile engine feature simple processing technique, wide source of raw material and low production costs, thus being capable of widely replacing petroleum as automobile fuels and being conductive to energy safety control of the nation. In addition, The inventive automobile engine has simple structure, low failure rate, no hulking parts, easy processing and manufacturing, no mechanisms moving to and fro, little abrasion, small vibration, little noise and pollution and convenient operation and maintenance.

A petrol generator set comprises a petrol engine and an AC generator. The petrol engine comprises a throttle valve and a fuel injector. The petrol generator set also comprises an electrically controlled speed stabilizing device connected with the petrol engine. The speed stabilizing device comprises a revolution speed sensor and an engine controller. The revolution speed sensor is used for obtaining the revolution speed information of the petrol engine. The engine controller is connected with the revolution speed sensor and the fuel injector of the petrol engine. The engine controller is used for producing fuel injecting control signals to the fuel injector according to the revolution speed information obtained by the revolution speed sensor, and the fuel injecting amount of the fuel injector is increased or reduced to make the revolution speed of the petrol engine keep stable. As a consequence, the petrol engine can still keep stable revolution speed during high-speed running, and the stable output voltage frequency is ensured when large power is output.