Method and system for starting and stopping engine of extended-range electric vehicle
A technology of electric vehicles and engines, which is applied in the direction of engine control, machine/engine, electrical control, etc., can solve the problem of NVH level difference of the whole vehicle when the engine is started, and achieve the effect of solving the problem of speed jitter and NVH problem
Pending Publication Date: 2022-07-29
HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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Problems solved by technology
[0005] In order to solve the problem of poor NVH level of the whole vehicle when the engine is started, the present invention further provides a method and system for starting and stopping the engine of an extended-range electric vehicle
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Embodiment Construction
[0028] In order to better understand the purpose, structure and function of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings.
[0029] A start-stop system for an extended-range electric vehicle engine
[0030] like figure 1 As shown, an extended-range electric vehicle engine start-stop system includes an engine 2, a generator 3, a drive motor 4, a reducer 6, a power battery 7, a motor controller 15, tires and other parts.
[0031] Engine 2 adopts Atkinson cycle high-efficiency engine; engine 2 contains at least one cylinder, including valve train, crank connecting rod structure, body group and other parts, and retains crankshaft position and camshaft position detection devices. And install the camshaft position sensor 9 and the crankshaft position sensor 10 at the above two positions;
[0032] The generator 3 includes a stator, a rotor, a water jacket, a casing and other structures, and the gen...
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The invention discloses an extended-range electric vehicle engine starting and stopping method and system, and belongs to the field of extended-range electric vehicles. The problem that the NVH level of a whole vehicle is poor when an engine is started can be solved. According to the engine stopping method, the engine is dragged by the generator so that the engine crank connecting rod mechanism can be stopped at the optimal starting position, the whole vehicle control unit outputs a start-stop control function closing instruction signal to the whole vehicle control unit signal receiving module, and the start-stop control function is quitted. Through the engine start-stop control function, when the engine stops, the engine is dragged by the generator to fix the stop position of the engine every time, so that the starting resistance torque of the engine is fixed, the generator can stably drag the engine to the dragging rotating speed according to the starting resistance torque of the engine, and the rotating speed shaking problem of the engine and the generator is solved; therefore, the NVH problem when the engine is started when the whole vehicle is static or runs is solved.
Description
technical field [0001] The invention belongs to the field of extended-range electric vehicles, and in particular relates to a method and system for starting and stopping an engine of an extended-range electric vehicle. Background technique [0002] With the improvement of people's living standards, the awareness of environmental protection has become stronger, and the fuel consumption and emission regulations have been continuously upgraded. It is necessary to reduce pollution from the source to the user, and protect the environment in the entire industrial chain. The goal of carbon neutrality and carbon peaking is achieved Must do. Among many new energy system architectures, the application and integration of extended-range electric vehicles has the characteristics of simple architecture and easy realization of a single vehicle compared with parallel and power splitting structures. The engine speed, torque and vehicle speed are completely decoupled, and the connection and ...
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IPC IPC(8): F02D41/00F02D41/02F02D41/04F02D41/06B60L50/62
CPCF02D41/009F02D41/042F02D41/062F02D41/0205B60L50/62
Inventor 王建武潘圣临刘锦杰王宏敏桂智勇施玉春马南孙国媛刘玉明张世伟闫立凯马江涛卢俊潘丽莉
Owner HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD