General Electric Company

Bertrand Dahung Hsu

Gong Chen

Robert Douglas Cryer

Paul Lloyd Flynn

Roger Neal Johnson

Gary L Leonard

Gregory James Hampson

Martin J Hapeman

Zujing Shen

Gregory L Confer

A method of controlling fuel injection timing in a compression ignition engine including at least one cylinder. The method includes monitoring a parameter indicative of a commanded operating speed of the engine corresponding to an engine throttle notch and monitoring a parameter indicative of the actual operating speed of the engine. When the commanded engine speed exceeds the actual engine speed, the fuel injection timing for the engine may be advanced to reduce emissions.

Apparatus and method for suppressing diesel engine emissions

A fuel injection system for a diesel engine operating at retarded fuel injection timing includes a fuel cam configured to increase a fuel injection pressure and decrease a fuel injection duration, thereby improving fuel atomization and combustion in a plurality of engine cylinders and improving an indicated efficiency of the engine and reducing exhaust emissions. The fuel cam is oriented in a phase relationship with a compression stroke top-dead-center position to accommodate the retarded fuel injection timing and to optimize an engine brake efficiency and performance.

High injection rate, decreased injection duration diesel engine fuel system

An exemplary embodiment of the invention is a method of controlling fuel injection timing in a compression ignition engine including at least one cylinder. The method includes monitoring engine throttle position and change. One of an acceleration and a load ascending transient operating mode is detected in response to the monitoring of throttle position and change. Fuel injection timing for the at least one cylinder is controlled in accordance with a predetermined timing schedule in response to the detection of one of an acceleration and a load ascending transient operating mode. A system for implementing the method is also disclosed.

A diesel engine adapted for operation under retarded fuel ignition timing relative to conventional fuel injection timing includes a piston shaped to increase the compression ratio of an engine cylinder, and specially designed combustion air intake and exhaust gas ports that increase scavenging flow of exhaust gases and allow for manipulation of air intake and exhaust gas valves with a cam shaft. Thus, an engine may be operated under retarded fuel injection timing to decrease emissions of nitrogen oxides without sacrificing engine performance and efficiency.

Increased compression ratio diesel engine assembly for retarded fuel injection timing

A fuel injection timing control system for diesel engines operating at high altitude includes a barometric sensor coupled to an altitude timing controller, and a throttle position sensor coupled to the engine and the altitude timing controller. The altitude timing controller adjusts fuel injection timing in response to the sensed pressure and sensed throttle position by advancing or retarding fuel injection timing by predetermined values as barometric pressure and/or throttle position changes. The predetermined values are selected to reduce exhaust emissions and/or increase engine efficiency and performance under various barometric pressure conditions so that the engine may be operated continually and optimally under various barometric conditions.

Reduced emissions elevated altitude diesel fuel injection timing control

A diesel engine includes a fuel injection control system communicating with a barometric pressure sensor and throttle position sensor. An elevation compensation controller adjusts engine speed and fuel injection timing at high altitudes in response to the sensed barometric pressure and engine throttle position. Engine speed is increased or decreased by predetermined values with changes in barometric pressure and throttle position to optimize engine performance and efficiency under various pressure conditions while reducing exhaust emissions.

Reduced emissions elevated altitude speed control for diesel engines

A combustion enhancing insert for a cylinder of an internal combustion engine having a body shaped for insertion into the cylinder so as to partially occupy the squish area of the cylinder as well as the crevice area of the cylinder. The combustion enhancing insert also occupies part of the combustion area but does not interfere with valve flow. The combustion enhancing insert can be attached to the cylinder head, cylinder wall or made as part of the head gasket and can be formed as part of the cylinder inserted as a retrofit. The present invention will reduce the amount of unburned combustion gases collecting in the squish area and crevice area. Also, the compression ratio will be increased. This will result in better fuel efficiency with less deposits and emissions.

Combustion enhancing insert for cylinder of an internal combustion engine

A method and apparatus are provided for introducing a main fuel and a pilot fuel which is more readily flammable than the main fuel and which serves to ignite the main fuel into an internal combustion engine having at least one cylinder having a combustion chamber. A set of conditions are defined to constitute high load conditions on the engine and to constitute low load conditions on the engine. The load conditions are detected. At high load conditions, the main fuel is introduced into the combustion chamber prior to introducing the pilot fuel and the pilot fuel is introduced into the combustion chamber a predetermined amount of time after the introduction of the main fuel. At low load conditions the pilot fuel is introduced into the combustion chamber in advance of the main fuel, and the main fuel is introduced into the combustion chamber a predetermined amount of time after the introduction of the pilot fuel.

Method and apparatus for introducing fuel into a duel fuel system using

This invention relates to accumulator injectors for a gas and/or liquid fueled diesel engine fuel injection system. Such structures of this type, generally, allows for variable injection timing and duration while providing a multiple fuel capability by changing the fuel distribution/atomization nozzle.

Electronically controlled accumulator injector

Apparatus and a method of introducing a primary fuel, which may be a coal water slutty, and a high combustion auxiliary fuel, which may be a conventional diesel oil, into an internal combustion diesel engine comprises detecting the load conditions of the engine, determining the amount of time prior to the top dead center position of the piston to inject the main fuel into the combustion chamber, and determining the relationship of the timing of the injection of the auxiliary fuel into the combustion chamber to achieve a predetermined specific fuel consumption, a predetermined combustion efficiency, and a predetermined peak cylinder firing pressure.

Method of combustion for dual fuel engine

Replenishment water is supplied to a coal-water slurry fuel injector between fuel releases, to resist clogging in the injector. The injector includes a cylindrical body having a needle valve in a central bore, and a fuel intake port which releases fuel into the engine through an opening in the side of the injector body. A nozzle having high pressure ducts is provided in an end of the body for releasing fuel into the engine. A clearance space is provided between the needle valve and the central bore for passage of the replenishment water into the injector. The replenishment water is forced into the nozzle and the high pressure ducts between releases of fuel. Lubricants can be added to the replenishment water, if desired. The replenishment water resists injector clogging by maintaining the fluidity of the coal-water slurry and purging dried coal particles.

Fuel injectors for diesel engines

A fuel injection system particularly adapted for injecting coal slurry fuels at high pressures includes an accumulator-type fuel injector which utilizes high-pressure pilot fuel as a purging fluid to prevent hard particles in the fuel from impeding the opening and closing movement of a needle valve, and as a hydraulic medium to hold the needle valve in its closed position. A fluid passage in the injector delivers an appropriately small amount of the ignition-aiding pilot fuel to an appropriate region of a chamber in the injector's nozzle so that at the beginning of each injection interval the first stratum of fuel to be discharged consists essentially of pilot fuel and thereafter mostly slurry fuel is injected.

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San Jose, CA, United States of America

Bertrand Dahung Hsu