A vehicle engine start control system and method
A starting control and engine technology, applied in the field of vehicles, to achieve the effect of improving NVH
Active Publication Date: 2020-09-11
GEELY AUTOMOBILE INST NINGBO CO LTD +1
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Problems solved by technology
During the above process, the reaction force will be transmitted to the vehicle body through the engine mount, and further transmitted to the vehicle seat, changing the vibration dose value of the seat, which in turn causes the NVH problem during the starting process
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0053] During engine cranking, every energy burned is used to accelerate the flywheel and is released throughout the vehicle. The physical positions of each cylinder of the engine are different, which will inevitably lead to the difference in the path of the thrust generated by the combustion in the cylinder to the flywheel and suspension through the crankshaft, and the vibration dose value at the vehicle seat is the weighted accumulation of the vibration level...
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The invention relates to a start control system and a start control method for a vehicle engine. The system comprises a traction motor, an engine, a rotating speed sensor, a phase sensor and a controller. The controller comprises an ignition advance angle presetting module, a rotating speed acquiring module, a first cylinder determination module and an ignition control module. The ignition advanceangle presetting module is used for setting a corresponding relationship between cylinders of the engine and an ignition advance angle presetting table; the rotating speed acquiring module is used for acquiring the current rotating speed of the engine; the first cylinder determination module is used for determining the cylinder injecting a fuel for the first time according to the current stroke states of the cylinders when the engine is at the first rotating speed; and the ignition control module is used for acquiring the ignition advance angle presetting table according to the cylinder injecting the fuel for the first time and acquiring the ignition advance angle to control ignition according to the ignition advance angle presetting table. NVH in the starting process of the engine can beimproved better by means of the system and method provided by the invention.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a vehicle engine starting control system and method. Background technique [0002] Noise, Vibration, Harshness (NVH for short) is a comprehensive problem to measure the quality of automobile manufacturing. It gives the most direct and superficial feeling to car users. NVH problems will directly affect occupants. ride comfort. [0003] Existing EMS (Engine Management System, engine management system) engine electronic injection technology, in the process of engine starting, EMS controls parameters such as air intake, fuel injection, ignition, etc., in the actual starting, firstly, the starter will drive the engine to a certain speed, and the engine will After the synchronization is completed, each cylinder of the engine performs fuel injection and ignition in sequence, and uses the energy generated by combustion to overcome the resistance, driving the engine speed to rise, and t...
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IPC IPC(8): F02D41/06F02D41/40F02D37/02
CPCF02D37/02F02D41/008F02D41/062F02D41/40F02D41/402F02D2200/02F02D2200/021F02D2200/101
Inventor 万铮朱永青杨卫甲
Owner GEELY AUTOMOBILE INST NINGBO CO LTD