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Hybrid electric vehicle, hcu and its method for idle speed control

A technology of idle speed control and engine controller, which is applied in the HCU and its idle speed control, hybrid electric vehicle field, can solve the problems such as not applicable to hybrid electric vehicles, achieve the effect of improving user experience, avoiding flameout, and improving safety

Active Publication Date: 2019-04-09
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the hybrid electric vehicle has more than one power source of the engine, this idle speed control method is not suitable for the hybrid electric vehicle

Method used

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  • Hybrid electric vehicle, hcu and its method for idle speed control
  • Hybrid electric vehicle, hcu and its method for idle speed control
  • Hybrid electric vehicle, hcu and its method for idle speed control

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Embodiment Construction

[0060] The power system control of a traditional internal combustion engine passenger car is generally implemented by an engine controller, which is responsible for functions such as engine start control, idle speed control, torque control, and shutdown control. Among them: engine idle speed control includes idle speed state calculation, idle speed target value calculation and idle speed closed loop control. Usually after the engine is started, or the engine is disconnected from the driveline and there is no driver torque demand, the engine will switch to idle speed control. The idle speed target value is generally determined according to the water temperature and the air conditioner status, and the engine controller performs speed closed-loop control according to the deviation between the actual engine speed and the idle speed target value.

[0061] Compared with the power system of the traditional internal combustion engine passenger car, the hybrid electric vehicle has more th...

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Abstract

The invention provides a hybrid electric vehicle, an HCU and an idle speed control method of the hybrid electric vehicle. The method includes the steps that whether the vehicle has a torque requirement or not is judged; when it is confirmed that the vehicle does not have the torque requirement, charging information of a high-voltage battery is received from a high-voltage battery controller; the water temperature and air conditioning state of an engine are detected; according to the charging information of the high-voltage batter and the water temperature and air conditioning state of the engine, a first idle speed target value of the engine is calculated; the first idle speed target value of the engine is sent to an engine controller, so that the engine controller correspondingly adjusts the rotation speed of the engine according to the first idle speed target value of the engine. By means of the scheme, the idle speed control of the hybrid electric vehicle can be achieved.

Description

Technical field [0001] The invention relates to the field of power source control, in particular to a hybrid electric vehicle, an HCU and a method for controlling idle speed. Background technique [0002] Cars, playing an increasingly important role in modern society, have become an indispensable part of most people's daily lives. In the context of advocating environmental protection, pure electric vehicles and hybrid electric vehicles (Hybrid Electric Vehicles, HEV) came into being. When a hybrid vehicle is running, there are three modes: pure engine mode, pure motor mode and hybrid mode. Among them: pure engine mode, only the engine provides power. In pure motor mode, only the motor provides power. In hybrid power mode, the engine and electric motor provide power at the same time. The hybrid controller (Hybrid Control Unit, HCU) is the core of the entire vehicle control, which is mainly responsible for coordinating the engine management system (Engine Management System, EMS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W20/15B60W40/00
CPCB60W10/06B60W40/00B60W2510/06B60W2510/244B60W2510/30B60W2710/0644
Inventor 冷宏祥田凯文李军强赵鑫谷靖张吉军杜建
Owner SAIC MOTOR
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