Control method and system of engine shutdown for hybrid vehicle

A hybrid vehicle, engine shutdown technology, applied in the direction of hybrid vehicles, engine control, machine/engine, etc., can solve problems such as not considering the engine, reducing engine performance, and unstable airflow in the SCR system, so as to achieve optimal running time, The effect of reducing urea crystallization

Inactive Publication Date: 2018-05-08
WEICHAI POWER CO LTD
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Problems solved by technology

It does not take into account the impact on the SCR system due to the short-term operation of the engine during the frequent start and stop of the engine
[0003] The frequent start and stop of the engine will cause the air flow in the SCR system to be unstable, and the mixing and volatilization of urea to be poor, resulting in the crystallization of urea in the SCR system, which will not only affect the exhaust emission of the engine, reduce the performance of the engine, but also bring Increased maintenance costs, etc.

Method used

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  • Control method and system of engine shutdown for hybrid vehicle
  • Control method and system of engine shutdown for hybrid vehicle

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Embodiment Construction

[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0024] A hybrid power system is a vehicle drive system including two power sources of an engine and a motor. There are three types: series, parallel and hybrid. The hybrid system described in the present invention does not include a series hybrid system.

[0025] figure 1 It is a structural schematic diagram of the control system of the embodiment of the present invention. like figure 1 As shown, the control system includes a veh...

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Abstract

The invention belongs to the technical field of engine control and particularly relates to a control method and system of engine shutdown for a hybrid vehicle. The control method comprises the steps of detecting basic information of a vehicle which includes engine information, motor information, battery information, gearbox information and vehicle information; detecting SCR (selective catalytic reduction) system temperature; when an engine is under running and if the basic information of the vehicle meets engine shutdown conditions with the SCR system temperature higher than a set value for aperiod of time, shutting down the engine. The control method and system have the advantages that the method and system are used to reasonably control stop time of an engine, running time of the engineof a hybrid system is optimized, and urea crystallization in the SCR system due to frequent start and stop of the engine of the hybrid system is decreased.

Description

technical field [0001] The invention belongs to the technical field of engine control, and in particular relates to a control method and a control system for shutting down the engine of a hybrid vehicle. Background technique [0002] In the prior art, during the process of shutting down the engine, the basis for judging the shutting down of the engine is composed of the working status of the engine, the motor, the battery and other vehicle-related information. It does not take into account the impact on the SCR system due to the short-term operation of the engine during the frequent start and stop of the engine. [0003] The frequent start and stop of the engine will cause the air flow in the SCR system to be unstable, and the urea mixing and volatilization effect will be poor, resulting in the problem of urea crystallization in the SCR system, which will not only affect the exhaust emission of the engine, reduce the performance of the engine, but also bring Increased maint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W20/00F02D29/02
CPCB60W10/06B60W10/08B60W20/00F02D29/02Y02T10/62
Inventor 赵秀敏刘林范鹏王立超
Owner WEICHAI POWER CO LTD
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