995 results about "Motor fuel" patented technology

A system for an engine, comprising of a cylinder located in the engine, a fuel delivery system for varying relative delivery amounts of a first and second injection type into said cylinder, and a controller configured to adjust a parameter affecting flow through the engine in response to said relative delivery amounts of said first and second injection type.

A start-stop or idle-stop method for a heavy-duty hybrid vehicle that turns off the fuel supply while maintaining the crankshaft rotation of the internal combustion engine when the vehicle stops or, optionally, when the vehicle travels downhill, travels in a noise sensitive location, travels in an exhaust emissions sensitive location, or operates in an emergency situation. The stop-start or idle-stop method automatically turns on the engine fuel supply to restart combustion when the vehicle starts accelerating, is no longer traveling downhill, is no longer traveling in a noise sensitive or exhaust sensitive location, is no longer in an emergency situation, or has dropped below the minimum energy storage restart level. The stop-start or idle-stop may be inhibited upon certain override conditions.

A fuel system for on-board vehicle fuel separation to supply engine fuel compositions formulated as a function of driving cycle conditions. The invention results in improvements in one or more of feed efficiency and combustion emissions.

A method is provided for control of a direct-injection engine operated with controlled auto-ignition (HCCI) during load transient operations between modes of lean combustion low load (HCCI / Lean) and stiochiometric combustion medium load (HCCI / Stoich.). The method includes 1) operating the engine at steady state, within a homogeneous charge compression-ignition (HCCI) load range, with fuel-air-exhaust gas mixtures at predetermined conditions, for each speed and load, and controlling the engine during changes of operating mode between one to another of the HCCI / Stoich. medium load mode and the HCCI / Lean lower load mode by synchronizing change rates of predetermined controlled inputs to the current engine fueling change rate.

A fuel system for on-board vehicle fuel separation to supply engine fuel compositions formulated as a function of driving cycle conditions. The invention results in improvements in one or more of feed efficiency and combustion emissions.

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.

A control system is provided for controlling the fueling system (402) of a combustion engine. The control system includes a sensing arrangement for measuring a plurality of engine and vehicle conditions (404, 406, 408, 410, 412) in real time. The control system also includes a fuel map that defines engine fueling parameters corresponding to engine operating conditions. The control system also includes a control module (102) that determines engine load from the sensed conditions, and controls the fueling parameters of the fueling system for optimized fuel consumption by selecting fueling parameters from the fuel map based on current engine load.

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.

A fuel system for on-board vehicle fuel separation to supply engine fuel compositions formulated as a function of driving cycle conditions. The invention results in improvements in one or more of feed efficiency and combustion emissions.

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.

A gas turbine engine fuel nozzle assembly includes a pilot fuel injector tip substantially centered about a centerline axis in an annular pilot inlet to a pilot mixer. A cross over arm extends across inlet to tip. Arm includes an arm fairing surrounding at least one fuel transfer tube to tip. A pilot nose cap is at an upstream end of tip. At least one of the cross over arm and the pilot nose cap includes a rounded forebody followed by a straight afterbody. Rounded forebody of pilot nose cap includes a substantially rounded dome extending forwardly from a rounded nose base and straight afterbody includes a substantially cylindrical nose afterbody parallel to a pilot nose centerline normal to nose base. An arm fairing surrounding fuel transfer tubes to tip includes rounded leading and trailing edges and a rectangular middle section therebetween having flat first and second sides.