A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal. A processor receives the signal and generates control signals based on the engine operating condition signal for controlling various engine components to control the temperature, pressure, equivalence ratio and/or autoignition properties so as to variably control the combustion history of future combustion events to achieve stable, low emission combustion in each cylinder and combustion balancing between the cylinders.

Premixed charge compression ignition engine with optimal combustion control

An internal combustion engine comprises an intake tract in which a throttle valve is disposed. The engine also comprises a camshaft which acts on gas inlet valves associated with respective cylinders. A phase-adjustment device is used to adjust a phase between the camshaft and a crankshaft. A desired air mass flow in a combustion chamber of the cylinder is determined depending on a charge requirement requested by the driver. The desired air mass flow is adjusted by varying the phase between the camshaft and the crankshaft if the desired air mass flow can be adjusted by varying the phase while substantially maintaining an actual pressure difference upstream and downstream of the throttle valve. Otherwise, the desired air mass flow is adjusted by varying the opening angle of the throttle valve.

Method and device for controlling an internal combustion engine

A system for an engine, comprising a cylinder located in the engine, a turbocharger coupled to the engine, a first injector for injecting a first fuel into said cylinder, wherein said first injector is a direct cylinder injector where said direct cylinder injector delivers a liquid including an alcohol, a second injector for injecting a second fuel into said cylinder, wherein said second injector is a port injector, where said port injector delivers a liquid including gasoline, a catalytic device configured to receive exhaust gases produced by at least the cylinder, and a controller configured to vary an amount of said first and second fuel injection during engine operation based on operating conditions, where amounts of variation of said first and second fuels are set to maintain a substantially stoichiometric mixture, the controller further configured to increase a relative amount of injection of the second injector in response to an indication of engine knock during a first operating condition, decrease engine boosting in response to the indication of engine knock during a second condition; and retard ignition timing in response the indication of engine knock during a third condition.

Engine output control system and method

A system for an engine, comprising of a cylinder of the engine; a first injector configured to inject a first substance to said cylinder; a second injector configured to inject a second substance to said cylinder; and a controller configured to commence combustion in the engine by injecting fuel into said cylinder, where said fuel is injected by only one of said first and second injectors during said start and/or warm-up.

Warm up strategy for ethanol direct injection plus gasoline port fuel injection

A method of operating an internal combustion engine having at least one combustion chamber including a first spark plug and a second spark plug, wherein the first spark plug is configured to operate at a higher temperature than the second spark plug, the method comprising of varying at least a resulting ratio of an amount of a fuel and an amount of a fluid delivered to the combustion chamber responsive to a first condition, and selectively using at least one of the first spark plug and the second spark plug to ignite at least one of the fuel and the fluid delivered to the combustion chamber.

First and second spark plugs for improved combustion control

A gas engine with electronically controlled and/or regulated injection of relatively small quantities of injection oil in such a way as to improve the metering accuracy of the injection oil quantity, the flexibility with which the required ignition oil quantity is provided and the ability to freely preset the timing of ignition oil injection. The engine comprises a separate electronically controllable injection system for each cylinder including at least one ignition oil injection device 13 connected via an injection line 14 to a separate ignition oil hydraulic pump 16 which is in fluid communication with a pressure accumulator 15. An electronically controllable switching device 19 associated with the injection device 13 is electronically connected to an engine control device 20 that controls, regulates and monitors the ignition oil injection.

Gas engine with electronically controlled ignition oil injection

The injection unit (13) is connected via an injection conduit (14) with a separate ignition oil hydraulic pump (16) connected to a pressure accumulator (15). An electronically controllable switch device (19) is provided for the injection unit and is electronically connected to an engine management system (20) incorporating the control, regulating and monitoring functions. The device can be used in a diesel/gas engine (1), which as main fuel uses gas exclusively, and per cylinder (2) has an injection system (13, 14, 15, 16, 19, 20) for the injection amount of ignition oil. In the injection system the fuel pressure is prepared by means of a pressure accumulator and a hydraulic pump (15, 16).

Device for control and regulation of ignition oil injection in gas engine

A self-igniting, mixture-compressing internal combustion engine for fuel gas includes a cylinder including a cylinder head; an insert operably engaged with the cylinder head; a main combustion space in the cylinder; and a prechamber in the insert. A low-pressure fuel line is connected to the main combustion space. A nozzle is at least partially disposed in the insert. The nozzle is operably connected to a high-pressure fuel line. The nozzle is used to inject fuel gas into the prechamber. At least one injection opening for connects the prechamber) to the main combustion space and passes the fuel gas from the prechamber to the main combustion space.

Self-igniting, mixture-compressing internal combustion engine and method for its operation

The gas engine has a regulating device (16) to optimize emission of harmful products. The mean temperature of all the combustion chambers is compared with a set value (22) to minimize emission of nitrogen oxides. It sends commands as required to at least one setting member (23, 23a, 29) influencing the mixture ratios. The gas supplied by the gas lines (25) is controlled by locking valves (28) to allow for individual variations between the cylinders.

Diesel gas engine

Die Erfindung betrifft eine selbstzundende gemischverdichtende Brennkraftmaschine
und ein Verfahren zu ihrem Betrieb mit gasformigen Brennstoff mit einer
vom Hauptbrennraum (7) abgeteilten Vorkammer (4), welche durch mindestens
eine Offnung (6) miteinander verbunden sind, wobei der Hauptbrennraum (7) mit
einer Niederdruck-Brenngas-Leitung und die Vorkammer (4) mit einer Hochdruck-Brenngas-Leitung
verbunden sind und das Brenngas/Luftgemisch aus der Vorkammer
(4) zum Zunden eines verdichteten Brenngas/Luftgemisches in den
Hauptbrennraum (7) uberblasbar ist, wobei die Vorkammer (4) in einem in den Zylinderkopf
(5) montierbaren Einsatz (1) gebildet wird, in welchem eine an die
Hochdruck-Brenngas-Leitung angeschlossene Duse (10) angeordnet ist, durch
welche das Brenngas in die Vorkammer (4) einblasbar ist und an dem Einsatz (1)
mindestens eine Uberblaseoffnung (6) vorgesehen ist, welche die Vorkammer (4)
mit dem Hauptbrennraum (7) verbindet.

Selbstzündende gemischverdichtende Brennkraftmaschine und Verfahren zu ihrem Betrieb

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