Optimization method for transient-state dynamic performance of engine
An optimization method and dynamic technology, applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as slow response and inability to truly respond to the driver's driving needs, and achieve the effect of increased power, large explosive force, and fast response
Inactive Publication Date: 2019-02-12
GUANGXI YUCHAI MASCH CO LTD
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Problems solved by technology
There is no transient correction for the main jet angle
Secondly, the comfort transient correction factor calculated by boost pressure is too slow to respond to the driver’s driving needs. Pressure increase-sensor acquisition-software internal logic processing-output correction coefficient
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[0016] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0017] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0018] For diesel engines, the larger the fuel injection advance angle, the better the power performance, but it is easy to exceed the explosion pressure; the smaller the advance angle, the better the emission performance, but the worse power performance, the engine transient according to the preferred embodiment of the present invention The dynamic optimization method takes advantage of the greater the fuel injection advan...
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The invention discloses an optimization method for the transient-state dynamic performance of an engine. The optimization method for the transient-state dynamic performance of the engine comprises thefollowing steps that firstly, an angle value of an oil spraying advance angle is obtained through the accelerator change rate; secondly, the upper limit and the lower limit of the angle value of theoil spraying advance angle are limited and controlled within the detonation pressure boundary range; and thirdly, the angle value, obtained after upper limit and lower limit limiting, of the oil spraying advance angle is added up to a basic value of a main spraying advance angle, a final oil spraying advance angle is obtained, and the dynamic acceleration performance is improved by increasing themain spraying angle in the transient-state process. According to the optimization method for the transient-state dynamic performance of the engine, the advance angle is appropriately increased and controlled within the detonation pressure boundary range according to the advantage that the large the oil spraying advance angle is, the better the dynamic performance is, the transient-state acceleration performance is optimized, and the defect that the transient-state acceleration of the engine is low is overcome.
Description
technical field [0001] The invention relates to the field of engines, in particular to an optimization method for engine transient dynamics. Background technique [0002] At present, the optimization method of diesel engine for transient is as follows: [0003] (transient supercharging pressure-steady-state intake pipe pressure model value) / transient supercharging pressure=transient correction coefficient. [0004] The calculated transient correction factor is only for the injection of pre-injection (diesel engine injection can be divided into pre-injection, main injection, and post-injection, and the main injection is the power output). At the same time, the transient correction factor also corrects and compensates the cycle fuel injection quantity . [0005] In the prior art, the dynamic compensation control in the rapid acceleration process is only limited to the correction and compensation of the cycle fuel injection quantity and the pilot injection angle. There is no...
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IPC IPC(8): F02D41/10F02D41/38
CPCF02D41/10F02D41/38
Inventor 刘星林鹏慧
Owner GUANGXI YUCHAI MASCH CO LTD