1004 results about "Motor fuel" patented technology

The present invention concerns an diesel engine fuel injection control, and a regeneration control method of exhaust gas post-treatment apparatus using this fuel injection control, and the engine fuel injection control for performing after injections (Fas, Fam) after a main injection (Fm) for activation and regeneration of the exhaust gas post-treatment apparatus, through the rising of diesel engine exhaust gas temperature or the decrease of the oxygen concentration in the exhaust gas, is composed to perform the after injections (Fas, Fam) in a range of 40° ATDC to 90° ATDC of the crank angle.Whereby, the main injection can be burned, without misfire, even when the main injection is largely retarded, or, the injection quantity is increased / decreased, and the engine operation can be sustained, by keeping the engine combustion in a good state.

Apparatus for maintaining the temperature of a component of a gas turbine engine below a predetermined maximum working temperature comprises a reservoir for a cooling fluid having a boiling point below the working temperature and in which the component is immersed or with which it is in contact. At least two heat exchangers are associated with the reservoir and operable to effect condensation of vaporised cooling fluid and return of same to the reservoir. Preferably the apparatus is a closed system incorporating three heat exchangers respectively adapted to effect heat exchange with engine fuel, compressed air derived from a fan or low pressure compressor of the engine and ambient air. Means may advantageously be provided to ensure return of condensed cooling fluid to the reservoir when the attitude of the reservoir is altered as a result of aircraft maneuvers.

The invention provides a fuel injection method for a dual-fuel engine, and belongs to the technical field of combustion of engines. According to the working conditions of the engine, all ignited fuel is injected through an air inlet side cylinder or directly injected through a cylinder cover; or part of the ignited fuel is injected from the air inlet side, and the other part of the ignited fuel is directly injected through the cylinder cover; or the ignited fuel is not injected. The ignited fuel injected from the air inlet side and air form thin premixed gas. The ignited fuel directly injected through the cylinder cover is injected after an exhaust valve is closed and before the fuel is compressed to the upper dead center, or is injected while the fuel is ignited, or is injected at the early stage of the expansion stroke. The ignited fuel and the premixed gas of the ignited fuel in an ignition cylinder are injected near the compression upper dead center. By controlling the ratio of the fuel injected from the air inlet side to the fuel directly injected through the cylinder cover and the injection phase, one of a premixing combustion mode, a premixing / diffusion mixing combustion, and a diffusion combustion mode is adopted by the engine according to different working conditions, and thus on the premise of guaranteeing the power performance, efficient and clean combustion under full working conditions is achieved.