Abstract:
A method for operating an internal combustion engine having a plurality of controllable engine actuators includes operating the engine in a first combustion mode using a first control scheme while simultaneously simulating operating the engine in a second combustion mode using a second control scheme and in accordance with simulated control settings for the plurality of controllable engine actuators, and transitioning operation of the engine to the second combustion mode using the second control scheme and initially in accordance with the simulated control settings for the plurality of controllable engine actuators.
Abstract:
A spark ignited, piston type diesel fueled internal combustion engine (10) is provided with a charge conditioning system that includes a fuel preheater (52) for vaporizing liquid fuel to enable starting of the engine (10) and at least one secondary heater (60) for adding additional heat to the charge supplied to the engine. The fuel vaporizer (40) receives liquid fuel from the starting fuel circuit of the engine (10) and uses an electrically or chemically energized heater device, or a direct combustion heater. The secondary heater (60) may be associated with the charge intake conduit of the engine (10) or with the combustion chamber of the engine (10). The secondary heater device (60) may be electrically or chemically activated, or may constitute a heat regenerator that retains heat from a previous combustion cycle of the engine. Spark plug fouling is avoided by utilizing secondary chambers (288, 290) adjacent the combustion chamber of the engine that direct expanding jets of high velocity gases towards the spark plug electrodes (164) each combustion cycle during the power stroke of the piston.
Abstract:
The invention relates to motor construction and specifically to internal combustion piston engines. The technical result of the invention consists in using a fuel with a low octane number, reducing the specific fuel consumption at minimum speeds and during idling, and also producing a maximum output power and torque at maximum speeds. On medium and maximum loads, air is fed into the combustion chamber by a compressor, and in the idling mode and on low loads, the compressor drive is disconnected from the engine shaft, and a feed of air into the combustion chamber is performed by creating a pressure drop between the atmosphere and the combustion chamber. The temperature and pressure of the compressed air fed by the compressor and the operating conditions for the compressor are regulated by changing the transmission ratio between the engine shaft and the compressor drive by means of a continuously variable variator. The compressor drive is additionally connected to the transmission shaft of the motor vehicle with the aid of a controllable clutch, and on low loads the controllable clutch of the compressor drive with the transmission shaft of the motor vehicle is left switched on. The air fed into the combustion chamber is additionally compressed in the compressor, which is driven by the energy of the products of combustion.
Abstract:
A method of operating a multiple cylinder internal combustion engine in a four-stroke cycle. A first amount of fuel is introduced into each of the cylinders (10) earlier than 45 degrees before top dead center of a combustion stroke. Air significantly in excess of that providing a stoichiometric amount of oxygen is also introduced into each cylinder to produce a first mixture upon introduction of the fuel, which mixture is ignited to produce a first combustion event. Subsequent to substantial completion of the first combustion event, but prior to top dead center in the same combustion stroke or shortly after top dead center in the expansion stroke, a second amount of fuel is introduced into each cylinder without additional air to form a second mixture which is ignited to produce a second distinct combustion event.
Abstract:
A method and apparatus for continually and rapidly adjusting the output torque of an engine according to a torque demand uses an active tappet to vary the instant air charge in a combustion chamber, so as to modulate engine torque during an automatic change of speed ratio. The invention allows substantially efficient combustion throughout the engine operating map. Various methods of changing the charge of air are disclosed.
Abstract:
Изобретение относится к двигателестроению, а именно к поршневым двигателям внутреннего сгорания. Техническим результатом изобретения является использование топлива с низким октановым числом, снижение удельного расхода топлива на минимальных оборотах и холостом ходе, а также получение максимальной выходной мощности и крутящего момента на максимальных оборотах. На средних и максимальных нагрузках воздух в камеру сгорания подают компрессором, а на режимах холостого хода и малых нагрузок привод компрессора отключают от вала двигателя, а подачу воздуха в камеру сгорания осуществляют путем создания перепада давления между атмосферой и камерой сгорания. Регулируют температуру и давление подаваемого компрессором сжатого воздуха, режим работы компрессора путем изменения передаточного отношения между валом двигателя и приводом компрессора бесступенчатым вариатором. Привод компрессора дополнительно связывают с валом трансмиссии автомобиля с помощью управляемой муфты, а на малых нагрузках управляемую муфту привода компрессора с валом трансмиссии автомобиля оставляют включенной. Подаваемый в камеру сгорания воздух дополнительно сжимают в компрессоре, приводимом энергией продуктов сгорания.
Abstract:
The present disclosure refers to a gas fuel admission system (1) for a gas fired engine (5). A gas pressure regulating unit (15) includes a gas pressure regulating unit inlet (20) and a gas pressure regulating unit outlet (25). The gas pressure regulating unit (15) is configured to receive gas and to discharge the gas at an injection pressure. An engine gas inlet (6) is configured to direct gas into the at least one combustion chamber (10). A gas admission valve (40) is configured to admit the gas having an injection pressure at a predetermined time for a predetermined duration into the engine gas inlet. A gas pressure relief device (60) is fluidly connected to the gas conduit (35) and it is configured to relieve overpressure of the gas in the gas supply conduit (35), if a pressure differential between the injection gas pressure and the intake air pressure is above a predetermined threshold. A specific engine control module (70) is configured to control the gas admission valve (40) in response to inputs from various sensing devices (70, 80).
Abstract:
An internal combustion engine (10) is operated by a method, according to which petrol is directly injected into a combustion chamber (12). The injection takes place at least temporarily in such a way that in association with a corresponding supply of air into the combustion chamber (12), the petrol-air mixture lies in layers in said combustion chamber (12). The aim of the invention is to reduce the petrol consumption of the internal combustion engine (10) by means of an increased compression ratio, without the risk of knocking. To achieve this, the petrol is injected exclusively during the compression phase of the internal combustion engine (12), even at wide-open throttle, by a multihole fuel injection device (22).
Abstract:
A spark ignited, piston type diesel fueled internal combustion engine is provided with a charge conditioning system that includes a fuel preheater for vaporizing liquid fuel to enable starting of the engine and at least one secondary heater for adding additional heat to the charge supplied to the engine. The fuel vaporizer receives liquid fuel from the starting fuel circuit of the engine and uses an electrically or chemically energized heater device, or a direct combustion heater. The secondary heater may be associated with the charge intake conduit of the engine or with the combustion chamber of the engine. The secondary heater device may be electrically or chemically activated, or may constitute a heat regenerator that retains heat from a previous combustion cycle of the engine. Spark plug fouling is avoided by utilizing secondary chambers adjacent the combustion chamber of the engine that direct expanding jets of high velocity gases towards the spark plug electrodes each combustion cycle during the power stroke of the piston.