31results about "Fuel systems" patented technology

A dual fuel engine (2) is provided which is supplied with diesel fuel and at least one secondary fuel, such as LPG. The engine (2) has a plurality of cylinders (4, 6, 8, 10) in which pistons reciprocate. Each cylinder has diesel injectors (4A, 6A, 8A, 10A) for injecting the diesel fuel into the cylinder during an appropriate stroke of the piston and an air inlet valve (4C, 6C, 8C, 10C) which opens during the appropriate stroke of the piston to permit air flow therethrough. Each cylinder is further provided with LPG injectors (4B, 6B, 8B, 10B) for injecting the secondary fuel into the cylinders. The LPG injectors are independent to and separate from the diesel fuel injectors. The LPG and diesel fuel injectors are also independently controlled.

A system to supply hydrogen-rich fuel to an internal combustion engine, whereby a hydrogen-rich gas is produced from a liquid raw fuel by a hydrogen generator. The exhaust line of the internal combustion engine contains an exhaust purification system, such as a DeNOx catalytic converter, which is at least temporarily supplied with hydrogen-rich gas through a bypass line. In addition, the exhaust line is in thermal contact with the hydrogen generator in order to recover thermal energy.

The invention is directed to a variable compression ratio internal combustion engine in which the compression ratio of the engine can be varied and multiple types of fuels having different combustion velocities are used. The invention provides a technology for achieving excellent engine performance for respective types of fuels. In the variable compression ratio internal combustion engine in which the compression ratio can be varied and multiple types of fuels having different combustion velocities are injected through multiple fuel injection valves, maps from which a target compression ratio of the internal combustion engine is read out are switched in accordance with the fuel used, thereby suppressing knocking or other disadvantages.

A system to supply hydrogen-rich fuel to an internal combustion engine, whereby a hydrogen-rich gas is produced from a liquid raw fuel by a hydrogen generator. The exhaust line of the internal combustion engine contains an exhaust purification system, such as a DeNOx catalytic converter, which is at least temporarily supplied with hydrogen-rich gas through a bypass line. In addition, the exhaust line is in thermal contact with the hydrogen generator in order to recover thermal energy.

A gasoline-diesel complex combustion engine may include a cylinder including a cylinder body in which a combustion chamber is formed to generate a driving power by combusting a gasoline fuel and a diesel fuel and a cylinder head formed to cover an upper portion of the cylinder body, a pair of intake ports formed in the cylinder head, a pair of exhaust ports formed in the cylinder head, a diesel injector disposed in a center of the cylinder head, a pair of spark plugs disposed on opposite sides of the diesel injector, a first intake pipe and a second intake pipe mounted in the intake ports, an exhaust pipe mounted in the exhaust ports, a pair of intake valves disposed in the first and second intake pipes, and a gasoline injector disposed in the first and second intake pipes to inject the gasoline fuel into the combustion chamber.

Various methods and systems are provided for an intake manifold for an engine. In one example, an insert comprises an annular body having a top surface, bottom surface, inner surface, and outer surface. The insert further comprises a first groove for coupling an intake air port of an intake manifold to a cylinder head, a second groove for circulating gaseous fuel received from a gas runner of the intake manifold, and one or more openings to fluidically couple the second groove to an interior of the intake air port. The insert is configured to mix gaseous fuel and intake air at a coupling location between the intake manifold and the cylinder head.

Various methods and systems are provided for an intake manifold for an engine. In one example, the intake manifold comprises a first passage for supplying intake air to a plurality of cylinders of the engine and a second passage for supplying gaseous fuel to the plurality of cylinders.

The invention discloses an air inlet structure for a dual-fuel engine. The air inlet structure comprises an air inlet pipe and a fuel air inlet manifold. The fuel air inlet manifold is connected with a valve piece box through a fuel air inlet branch pipe. The fuel air inlet manifold comprises an outer air inlet manifold body and an inner air inlet manifold body. The fuel air inlet branch pipe comprises an outer air inlet branch pipe body and an inner air inlet branch pipe body. One end of the outer air inlet branch pipe body is connected with the outer air inlet manifold body, and the other end of the outer air inlet branch pipe is connected with a cover plate of the valve piece box. One end of the inner air inlet branch pipe body is connected with the inner air inlet manifold body, and the other end of the inner air inlet branch pipe body is connected with a fuel gas inlet connecting pipe extending in the valve piece box. At least one fuel gas jetting valve communicated with the inner air inlet branch pipe body is arranged in the valve piece box, wherein a nozzle is arranged on the fuel gas jetting valve and extends in the air inlet pipe. The air inlet structure for the dual-fuel engine has the advantages of being simple and compact in structure, safe, reliable and high in combustion efficiency, and therefore the energy utilization rate is increased.

The invention discloses a marine LNG / diesel oil dual-fuel engine safety monitoring system. A central control room control cabinet serves as a core of an overall system, an industrial personal computer in the central control room control cabinet is connected with a programmable logic controller, a fuel gas alarming controller, an LNG air storage tank communication module, a thermocouple collecting module and a serial port relay module which are arranged in an on-site control cabinet through a USB-to-RS485 converter. The programmable logic controller in the on-site control cabinet is connected with a rotating speed sensor, a temperature sensor, a pressure sensor, a flame detector and an interlocking gas valve. The fuel gas alarming controller module is connected with a fuel gas detector. The LNG air storage tank communication module is connected with a gas tank pressure and liquid level sensor. The thermocouple collecting module is connected with an air cylinder exhaust temperature sensor. A real-time and accurate safety monitoring data report can be provided, analysis and treatment on the LNG / diesel oil dual-fuel engine system in the later period are facilitated, and the safety monitoring system can be conveniently used for engines in different types and different monitoring schemes.

A work machine is provided. The work machines may include a power module configured to provide power including a battery and an engine and configured to a folding heat exchange device. The work machine may also include a drive module configured with one or more motors and positioned over a track roller frame. The work machine may also include a hydraulic module including one or more devices in a front region and one or more devices in a rear region to cut or rip encountered material

The invention discloses a fuel feed system for a multi-fuel variable-frequency generator. The fuel feed system comprises a fuel gas feed module, a gasoline feed module and an oil-gas transformation control module. The oil-gas transformation control module comprises a multi-fuel carburetor (9), a normally-open solenoid valve (8), a direct current stabilizer (7), a solenoid valve microswitch (5) and a flameout microswitch (17). A valve needle (31) of the normally-open solenoid valve (8) is matched with an oil extraction hole (30) of an oil cup (29). A boss (22) of a fuel gas switch handle (3) is matched with a warping plate (21) of the solenoid valve microswitch (5). A throttle control rod (14) is provided with a throttle shifting fork (24) and a reset spring (15). A gasoline switch handle (18) is provided with a handle shifting fork (25). When a gasoline switch (16) is turned on, the handle shifting fork (25) is matched with the throttle shifting fork (24); and when the gasoline switch (16) is turned off, the handle shifting fork (25) is matched with a warping plate (23) of the flameout microswitch (17). By means of the structure, the fuel feed system for the multi-fuel variable-frequency generator has the characteristics of being modularized in structure, easy and convenient to operate, smooth and steady in oil-gas switching, free of external power sources, good in stability and the like.

The invention belongs to the technical field of engines, and particularly relates to a methanol engine system adopting methanol to produce hydrogen serving as an ignition agent and an operation method of the methanol engine system. The methanol engine system adopting a two-level heating methanol hydrogen production manner comprises a methanol engine, a gas supply system and an exhaust system, wherein the gas supply system comprises a methanol heater and a methanol hydrogen production device. The invention further discloses the operation method of the methanol engine system. According to the methanol engine system and the operation method of the methanol engine system, methanol-based fuel is adopted for the reaction to generate the hydrogen serving as the ignition agent, ignition agent preparing and stable, continuous and accurate supply to the engine are achieved, and completely replacing the diesel fuel with the methanol-based fuel is achieved under the situation of no need to change the structure of the engine.