摘要:
Providing a control method for controlling an engine of a precombustion chamber type, whereby the misfiring in the precombustion chamber is surely prevented. In the control method for controlling an engine of a premix combustion type, the method including, but not limited to the processes of: a first step where the charging air pressure, the charging air temperature and the engine speed are detected; a second step where the air excess ratio of the air fuel mixture supplied to the main combustion chamber is computed as per predetermined relational expressions; a third step where the amount of the fuel to be supplied to the precombustion chamber is duly computed as per the relational expression between the air excess ratio of the air fuel mixture in the main combustion chamber and the fuel amount of the air fuel mixture in the precombustion chamber; a fourth step where the valve opening duration regarding a precombustion chamber fuel supply valve for controlling the amount of the fuel to be supplied to the precombustion chamber is computed as per a relational expression between the valve opening duration and the computed fuel amount of the air fuel mixture in the precombustion chamber.
摘要:
An apparatus and method for utilizing any arbitrary mixture ratio of multiple fuel gases having differing combustion characteristics, such as natural gas and hydrogen gas, within an internal combustion engine. The gaseous fuel composition ratio is first sensed, such as by thermal conductivity, infrared signature, sound propagation speed, or equivalent mixture differentiation mechanisms and combinations thereof which are utilized as input(s) to a “multiple map” engine control module which modulates selected operating parameters of the engine, such as fuel injection and ignition timing, in response to the proportions of fuel gases available so that the engine operates correctly and at high efficiency irrespective of the gas mixture ratio being utilized. As a result, an engine configured according to the teachings of the present invention may be fueled from at least two different fuel sources without admixing constraints.
摘要:
An engine assembly may include an engine structure, an intake manifold, and a liquefied petroleum gas (LPG) fuel assembly. The engine structure may define a combustion chamber and the intake manifold may be in communication with the combustion chamber. The LPG fuel assembly may include a LPG fuel tank containing LPG fuel, a liquid LPG fuel injection system in communication with the LPG fuel tank and the combustion chamber, and a vapor LPG fuel injection system in communication with the LPG fuel tank and the intake manifold.
摘要:
The invention relates to balancing the cylinders of an internal combustion engine. The invention comprises cylinder-specific pressure sensors (1) installed in the cylinders of an internal combustion engine for measuring the cylinder pressures as well as an adjustment unit (2). The adjustment unit is arranged to determine the maximum pressure and knock value of each cylinder as well as the mean maximum pressure of the cylinders as a response to the measurements of cylinder pressures and to determine the differences between the maximum pressure of each cylinder and the mean maximum pressure. The differences are compared to a certain deviation range of the mean maximum pressure and the knock value to a certain knock limit value. The duration of the fuel injection of the cylinder is adjusted in case the difference of a single cylinder exceeds the lower limit of the deviation range and the knock value of the cylinder is less than the knock limit value or the difference of the cylinders exceeds the upper limit of the deviation range.
摘要:
The invention relates to balancing the cylinders of an internal combustion engine. The invention comprises cylinder-specific pressure sensors (1) installed in the cylinders of an internal combustion engine for measuring the cylinder pressures as well as an adjustment unit (2). The adjustment unit is arranged to determine the maximum pressure and knock value of each cylinder as well as the mean maximum pressure of the cylinders as a response to the measurements of cylinder pressures and to determine the differences between the maximum pressure of each cylinder and the mean maximum pressure. The differences are compared to a certain deviation range of the mean maximum pressure and the knock value to a certain knock limit value. The duration of the fuel injection of the cylinder is adjusted in case the difference of a single cylinder exceeds the lower limit of the deviation range and the knock value of the cylinder is less than the knock limit value or the difference of the cylinders exceeds the upper limit of the deviation range.
摘要:
A hydrogen engine 10 supplies hydrogen, oxygen, and an argon gas serving as a working to a combustion chamber 21 to combust the hydrogen. H2O in a recirculating gas discharged from the combustion chamber 21 is separated and eliminated from the gas by a condenser 66. A three-way valve 72 is switched over in such a manner that the recirculating gas flows through a product eliminating section 70 (a carbon dioxide absorbing unit 71), when the concentration of carbon dioxide in the recirculating gas is higher than a predetermined concentration, so that the carbon dioxide is separated and eliminated from the recirculating gas.
摘要:
A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.
摘要:
Disclosed is method and apparatus for supplying fuel of LPG car having LPI system. More particularly, the present invention generates a gas fuel injection signal based on a gasoline fuel injection signal and directly injects LPG fuel within a fuel tank to a combustion chamber using the generated gas fuel injection signal to drive an engine. Therefore, an engine can be easily changed, the manufacturing cost of a duel car of LPG and gasoline can be reduced, and the manufacturing process thereof can be simplified.
摘要:
A method is described for operating a gaseous fueled engine, where gaseous fuel and intake air are delivered to a first intake port of a cylinder of the engine and intake air without gaseous fuel is delivered to a second intake port of the cylinder, the first port separated from the second port. Further, the method includes inducting the fuel and intake air from the first port via a first intake valve, and the intake air from the second port via a second intake valve, into the cylinder, where the first intake valve is opened after the second intake valve.
摘要:
A gaseous fuel injector 3 supplies gaseous fuel from a compressed gas cylinder 1 into a measuring portion thin tube 5 and pressure change in the tube is measured by a pressure measuring device 4 through a small hole provided in the thin tube 5. An extension thin tube 6 for removing the influence of reflected waves is provided on the downstream side of the measuring portion thin tube 5. There is provided at the downstream side end of the extension thin tube a back pressure valve 13 for uniformly increasing the pressure in the tube and for bringing the pressure close to the actual environment in the engine cylinder. Also, a tapered-shape nozzle is arranged in the measuring portion thin tube 5. Pressure measured by the pressure measuring device 4 is transduced into mass flow rate in the thin tube according to a predetermined calculation formula. Accordingly, it is possible to measure instantaneous mass flow rate of gaseous fuel injected from the gaseous fuel injector.