Injection pressure and fuel injection quantity coupling method for low-temperature operation stability of diesel engine
A technology with injection pressure and stable operation, which is applied in fuel injection control, mechanical equipment, engine control, etc., can solve the problems of unfavorable and stable ignition, increased misfire probability, and difficult transition of hot and cold flames smoothly, so as to improve ignition stability, The effect of shortening the ignition delay period and widening the low-temperature ignition limit
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[0021] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0022] The invention provides a coupling method of injection pressure and fuel injection quantity for the low temperature operation stability of a diesel engine. When the atmospheric temperature is lower than -20° C., as the temperature at the end of compression decreases, the injection pressure when fuel is supplied to the combustion chamber of the diesel engine is reduced. At the same time, the method of increasing the fuel injection concentration can ensure the ignition and stable operation of the diesel engine. The coupling method of the present invention is described in detail below by taking a heavy-duty diesel engine with a nozzle hole diameter of 0.2 mm or more, a cylinder diameter of 90 mm or more, and a compression ratio of 13-18 as an example.
[0023] When the compression end temperature is 850K, the corresponding injection pressure is 80MPa...
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