摘要:
A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.
摘要:
A novel and improved engine and method are provided which includes a premixed charge compression ignition engine capable of operating over a wide load range without the need to vary the IMT beyond easily achievable or desirable temperature levels. The engine and method adjust the start of combustion by adjusting the engine speed and torque while delivering a targeted engine horsepower output.
摘要:
An internal combustion engine operable in a premixed charge compression ignition mode and a method for operating the engine, the engine including an engine body with a piston assembly, a combustion chamber formed in the engine body by the piston assembly, an intake system for delivering intake air to the combustion chamber during an intake stroke, a mixing device that mixes a first fuel with the intake air to provide a premixed charge of air and the first fuel, a direct fuel injector adapted to directly inject a second fuel into the combustion chamber, and a control system adapted to control the direct fuel injector in a manner to provide at least one early control injection, and preferably, a plurality of early control injections of the second fuel into the combustion chamber before start of combustion of the premixed charge.
摘要:
Diesel engine conversion kit wherein said kit arranged at the engine air inlet of a diesel engine to be transformed, comprises three different pieces defining an air inlet means, gas feeding means and flux regulating means. Said air inlet means comprises a hollow cylindrical piece with a central narrowed position affixed to said gas feeding means. Said gas feeding means comprises passages whose arrangement coincides with the arrangement of the above cited inlet. Inside said passages feeding gas tubes including long gas exit grooves, are lodged. Finally said flux regulating means comprises a plate with two feeding passages in coincidence with the above cited passages of gas feeding means, each including choker plates with a common regulating means.
摘要:
An apparatus and method for converting a fuel injected internal combustion engine normally operated with a conventional fuel such as gasoline to operate with an alternative fuel are disclosed. The apparatus comprises an alternative fuel introduction assembly having at least one alternative fuel injector, a temperature sensor, and an electronic translator. The electronic translator is adapted to receive conventional fuel injector control signals generated by an electronic control module, and to receive an output signal from the temperature sensor. The electronic translator then calculates an alternative fuel injector control signal to facilitate the supply of a required energy amount of the alternative fuel. The calculation is based upon the energy content of the alternative fuel, the temperature of the alternative fuel, and the flow and operating characteristics of the alternative fuel injector relative to a conventional fuel injector. Preferably, the alternative fuel is natural gas.
摘要:
A split-cycle aircraft engine includes a crankshaft rotatable about a crankshaft axis. A power piston is slidably received within a power cylinder and is operatively connected to the crankshaft such that the power piston reciprocates through an expansion stroke and an exhaust stroke during a single rotation of the crankshaft. A compression piston is slidably received within a compression cylinder and is operatively connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke during a single rotation of the crankshaft. A gas crossover passage operatively interconnects the compression cylinder and the power cylinder. An air reservoir is operatively connected to the gas crossover passage by a reservoir passage. The air reservoir is selectively operable to receive and deliver compressed air. The engine is mounted to an aircraft and the air reservoir is disposed within the aircraft.
摘要:
A split-cycle aircraft engine includes a crankshaft rotatable about a crankshaft axis. A power piston is slidably received within a power cylinder and is operatively connected to the crankshaft such that the power piston reciprocates through an expansion stroke and an exhaust stroke during a single rotation of the crankshaft. A compression piston is slidably received within a compression cylinder and is operatively connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke during a single rotation of the crankshaft. A gas crossover passage operatively interconnects the compression cylinder and the power cylinder. An air reservoir is operatively connected to the gas crossover passage by a reservoir passage. The air reservoir is selectively operable to receive and deliver compressed air. The engine is mounted to an aircraft and the air reservoir is disposed within the aircraft.
摘要:
In a method of operating a 4-stroke internal combustion engine selectively in a compression ignition operation, in which an outlet valve of the internal combustion engine is closed at a comparatively early closing time point with respect to a crank angle (α) and in spark ignition operation, in which the outlet valve is closed at a comparatively late closing time point with respect to the crank angle (α), during the changeover from the spark ignition mode of operation to the compression ignition mode of operation, the closing time point of the outlet valve is transferred from the late closing time point to the early closing time point in steps distributed over multiple 4-stroke cycles.
摘要:
In a method of operating a reciprocating-piston internal combustion engine with a combustion chamber in which a fuel mix with fresh gas is provided via intake ports and combustion exhaust gases are discharged through exhaust ports which can be opened by intake valves and, respectively, exhaust valves which are actuated by a valve operating mechanism, wherein an operating mode with external ignition, in which the fuel mix is ignited by a spark plug, is provided in part of the load range of the internal combustion engine, and an operating mode with compression ignition, in which the control of the gas exchange valves is altered so as to retain combustion exhaust gases in the combustion chamber for participation in the formation of the fresh mix is provided in another load range of the internal combustion engine, during a change in the operating mode the valve lift of at least one of the gas exchange valves is altered.