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Halt control method and system of hybrid power vehicle

A technology of hybrid electric vehicles and control methods, applied in the direction of hybrid electric vehicles, motor vehicles, transportation and packaging, etc., to achieve the effect of improving characteristics and smooth shutdown

Active Publication Date: 2015-06-17
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device and method is actually only a means of correction after the event, and cannot prevent the phenomenon of engine reversal in advance, and cannot really avoid the reverse of the engine from the source. Therefore, there are still defects

Method used

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  • Halt control method and system of hybrid power vehicle
  • Halt control method and system of hybrid power vehicle
  • Halt control method and system of hybrid power vehicle

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Embodiment Construction

[0028] In order to make the above objects, features and advantages more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a structural diagram of a power system of a hybrid electric vehicle according to an embodiment of the present invention. Such as figure 1 As shown, the hybrid electric vehicle of the present invention has a hybrid electric vehicle shutdown control system, which specifically includes a hybrid system controller (Hybrid Control Unit, HCU) 01, an engine 10 for converting chemical energy into mechanical energy output, and an engine 10 for outputting mechanical energy. An engine controller (Engine Control Unit, ECU) 11 for controlling the engine 10, a gearbox 20, a gearbox controller (Transmission Control Unit, TCU) 21 for controlling the gearbox 20, connected to the engine 10 through a transmission mechanism motor 30, a motor controller (M...

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Abstract

The invention discloses a halt control method and system of a hybrid power vehicle. The halt control method comprises the steps of: judging a reversal-preventing control entry condition; if according with the reversal-preventing control entry condition, controlling an engine to prevent from reversing, wherein the control step comprises the procedures of detecting in real time to obtain an engine rotating speed signal of reflecting a rotating speed of an engine; comparing the rotating speed signal of the engine with a preset ideal rotating speed of the engine to obtain a rotating speed difference; calculating the rotating speed difference through a PID controller to obtain a theoretical target motor output torque, calculating according to the theoretical target motor output torque to obtain an actual target motor output torque needing being implemented by a motor, sending a command for implementing the actual target motor output torque to the motor; and implementing the actual target motor output torque by the motor, and acting the torque implemented by the motor to the engine. Therefore, the reversal of the engine before automatic halt can be prevented.

Description

technical field [0001] The present invention relates to hybrid electric vehicle engine start / stop control, in particular to a hybrid electric vehicle shutdown control method and system. Background technique [0002] One of the advantages of a hybrid vehicle over a traditional vehicle is that it can automatically stop the vehicle when it is idling, thereby reducing fuel consumption and emissions. The automatic shutdown function refers to the system controlling the engine to shut down when the signals such as the car gear position, vehicle speed, brake pedal, and battery status meet the conditions. And when the engine needs to be restarted, the engine starts to inject fuel when the motor drives the engine to a certain speed. [0003] For example, Chinese Invention Patent Application Publication No. CN1986307A discloses an engine start-stop control method for a hybrid electric vehicle. When the engine coolant temperature is higher than the predetermined set value, the vehicle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W40/10B60W20/10
CPCY02T10/62
Inventor 张君鸿周宇星孟涛冯亚军秦锦邱国茂
Owner SAIC MOTOR
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