101results about How to "Reduce fuel injection" patented technology

A system for controlling fuel injection in an engine. The engine includes an intake passage, an intake passage injector, a cylinder having a combustion chamber, and a cylinder injector for injecting a target amount of fuel into the combustion chamber. The system includes a controller for controlling the intake passage and cylinder injectors to permit fuel injection, each with an injection ratio, while said engine operates in a condition in which said engine permits fuel injection from said cylinder injector, a sensor for sensing the amount of fuel injected from the cylinder injector, a detector for detecting the difference between the target injection amount and the amount of fuel injected and an adjuster for adjusting the injection ratio based on the result of the detection by the detector so that the intake passage injector performs fuel injection together with the fuel injection performed by the cylinder injector.

A fuel injection control apparatus for an internal combustion engine which can inject a fuel injection quantity to a fuel injector with accuracy even when the fuel injection quantity is reduced than before is provided. A fuel injection control apparatus of a direct cylinder injection type of internal combustion engine, including a fuel injector which performs fuel injection by supplying a drive current to a solenoid, a fuel pressure sensor which detects fuel pressure supplied to the fuel injector, and operation state detecting means which detects the operation state of the internal combustion engine, comprises current profile changing means 100 which has multiple current profiles of the drive current and changes current profiles based on the operation state and the fuel pressure, valid pulse width calculating means 701 which calculates a valid pulse width for opening and driving the fuel injector, invalid pulse width calculating means 103 which calculates an invalid pulse width, and fuel injector control means which calculates a fuel injection pulse width based on the valid pulse width and the invalid pulse width, and controls the fuel injector based on the fuel injection pulse width, wherein the invalid pulse width calculating means 103 calculates an invalid pulse width corresponding to the current profiles to be changed before the current profiles are changed.

During a gear shift from a gear under load to a target gear, the torque MM of the driving engine is set to an idling torque by a modification of the injection quantity aME before the gear under load is disengaged and to a load torque by a reverse modification of the injection quantity before the target gear is engaged. To allow the process to be better adapted to the respective operating conditions, at least one operating parameter that characterises the current operating condition of the motor vehicle and / or a shift parameter that characterises the designated gear shift is detected and evaluated at the start of the gear shift, and the injection quantity a0a of the driving motor that is assigned to the idling torque is variably adapted to the operating condition of the motor vehicle and / or the gear shift in accordance with the evaluated result.

A fuel injection control apparatus is capable of reducing a minimum quantity of fuel injection without reducing a maximum quantity of injection. To open a fuel injector valve, a driving circuit supplies an electric current from a high-voltage power supply to the fuel injector. Then, after valve opening, the high-voltage power supply is switched to a low-voltage power supply, and an open state of the valve is retained. For opening the valve of the fuel injector, a microcomputer, after supplying current from the high-voltage power supply to the injector, discharges the current rapidly for a decrease below a first current level at which the open state of the valve cannot be retained. The microcomputer then controls the supply current to the injector so as to supply a current at a second current level at which the open state of the valve can be retained.

With a method for operating an internal combustion engine with a fuel injector (18) that is opened and closed electrically, a booster capacitor (BK) serving to increase the current intensity when the fuel injector (18) is opened, reliable fuel injection is ensured, even in extreme cases, such as resumption of fuel injection after an overrun condition, and in a starting procedure after a shutoff phase that is accompanied by an increase in pressure in the high pressure fuel system due to the fuel heating up, when booster capacitors are used that were designed for normal operation, by switching the current profile in certain operating states of the internal combustion engine from a standard value to an increased value and / or to a longer duration and, when the certain operating state ends, by resetting it to the standard value and the standard duration.

Methods, systems, and computer program products are provided for control of a combustion engine in a vehicle. At least one future speed profile for an actual speed of the vehicle during a road section is simulated based on information about the road section, and that coasting will be applied during the road section. An applicability for coasting during the road section is evaluated. Subsequently, it is evaluated whether the combustion engine may be shut down during a coasting for at least a part of the road section. The evaluation of the shutdown of the combustion engine is based on whether one or several system conditions for engine shutdown have been met, on one or several properties for one or several brake systems in the vehicle, and on a shutdown period, when the combustion engine could be shut down. The combustion engine is then controlled based on this evaluation.

A fuel injection control apparatus for an internal combustion engine which can inject a fuel injection quantity to a fuel injector with accuracy even when the fuel injection quantity is reduced than before is provided. A fuel injection control apparatus of a direct cylinder injection type of internal combustion engine, including a fuel injector which performs fuel injection by supplying a drive current to a solenoid, a fuel pressure sensor which detects fuel pressure supplied to the fuel injector, and operation state detecting means which detects the operation state of the internal combustion engine, comprises current profile changing means 100 which has multiple current profiles of the drive current and changes current profiles based on the operation state and the fuel pressure, valid pulse width calculating means 701 which calculates a valid pulse width for opening and driving the fuel injector, invalid pulse width calculating means 103 which calculates an invalid pulse width, and fuel injector control means which calculates a fuel injection pulse width based on the valid pulse width and the invalid pulse width, and controls the fuel injector based on the fuel injection pulse width, wherein the invalid pulse width calculating means 103 calculates an invalid pulse width corresponding to the current profiles to be changed before the current profiles are changed.

The invention discloses a mist spray covering device for an oil film on the side face of an elevator guide rail. The mist spray covering device comprises a base support and a plurality of rollers. The rollers are arranged on the base support at intervals. The T-shaped guide rail is conveyed forwards on the rollers. The base support is provided with a supporting plate, and the supporting plate is symmetrically provided with swing arms located at the two sides of the T-shaped guide rail. Oil suction rollers are arranged at the front ends of the swing arms separately. The base support is provided with an oil receiving tank located below the oil suction rollers. The oil receiving tank is provided with an oil pump. The output end of the oil pump is provided with bends extending to the two sides of the T-shaped guide rail. According to the mist spray covering device for the oil film on the side face of the elevator guide rail, by the adoption of the mode, anti-rust oil in the oil receiving tank can be atomized to be sprayed onto the two side faces of the T-shaped guide rail through an atomizing spray head, and then the two side faces of the T-shaped guide rail are clamped through the oil suction rollers, so that oil droplets are evenly smeared, and redundant anti-rust oil can be adsorbed and recycled.

The invention discloses a high revolving speed fuel oil magnetic valve and a method for measuring closing and starting points thereof. The high revolving speed fuel oil magnetic valve comprises a valve body, wherein two ends of the valve body are respectively provided with a valve end cover and a valve seat; the inner cavity of the valve body is provided with a valve core which is arranged close to the valve end cover; a valve close piece is matched in the inner cavity of the valve seat; the inner cavity of the valve body is provided with a magnetic coil; the valve core is supported on a bulge arranged in the inner cavity of the valve body through a secondary oscillating unit; the secondary oscillating unit comprises a moving block, and an upper spring and a lower spring which are respectively connected with two ends of the moving block; and the lower spring is installed on the bulge in the inner cavity of the valve body, and the upper spring is connected with the valve core. According to the invention, the amplitude value of the original system rebound vibration is reduced effectively; and through the accurate estimation of the closing and starting points of the magnetic valve, the exchanging time of the loading voltage and the retaining voltage can be determined accurately, the response speed of the magnetic valve is improved, and simultaneously the settling speed of the magnetic valve is reduced.

The invention discloses a vehicle intelligent speed limit system and method. A GPS (Global Positioning System) navigation module detects a highest speed limit value of a road in which a vehicle is located currently; a vehicle speed sensor detects the vehicle driving speed; an engine electronic control unit limits the vehicle speed within a regulated speed range through a closed loop speed limit control and regulate throttle valve and an oil atomizer according to the differences between the current vehicle speed and the highest speed limit value; meanwhile the engine electronic control unit lights a brake lamp when performs speed limit motions to warn other vehicles and guarantee safety; a warning is sent to a driver of the vehicle through a voice prompt system to enable the driver to know speed limit conditions. The vehicle intelligent speed limit system and method has the advantages of monitoring the road section in which the vehicle is arranged and the current vehicle speed in real time, improving the vehicle driving safety due to the fact that the electronic control unit initiatively limit the vehicle speed intelligently according to the requirements and meanwhile reducing the working pressure of traffic management departments to some extent.

A drive control circuit supplies power to a solenoid coil in an in-cylinder injector of a cylinder in response to a fuel injection signal. A failure detection circuit to detect disconnection failure at an in-cylinder injector is arranged to be shared among cylinders whose phase of each stroke differs 360 degrees in crank angle. An engine ECU detects failure including identification of the injector with disconnection failure based on a failure detection signal from the failure detection circuit, and a crank angle detected by a crank angle sensor. The driver is notified of the failure detection result through the engine ECU.

The invention relates to a compressor system (10) comprising a compressor (12) for supplying compressed air to a utility vehicle (14) that has a driving engine (18) with a turbocharger (16). Air that is pre-compressed by the turbocharger (16) can be sucked in by the compressor (12) via a first air supply pipe (20). According to the invention, ambient air that is not pre-compressed can be sucked in by the compressor (12) via a second air supply pipe (12). The invention further relates to a method for controlling a compressor system (10) comprising a compressor (12) for supplying compressed air to a utility vehicle (14) that has a driving engine (18) with a turbocharger (16).

A fastening device for a fuel injection valve (5) in a bore (3) in the cylinder head of an internal combustion engine, in which the fuel injection valve (5) has a longitudinal axis (6). A clamping jaw (20) is acted upon by a fastening force, and the clamping jaw (20) rests with at least one support face (30) on a support point (32) of the fuel injection valve (5), so that the clamping jaw (20) is pressed with its support face (30) against the support point (32). The support point (32) on the fuel injection valve (5) is embodied linearly, and the line is straight and in its imaginary extension intersects the longitudinal axis (6) of the fuel injection valve (5)