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Series working condition control system and method for hybrid electric vehicle

A technology for hybrid electric vehicles and operating conditions, applied in the direction of hybrid electric vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as other performance developments that are not considered separately

Active Publication Date: 2021-11-05
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above scheme takes into account the hybrid vehicle mechanism and the control in each mode, but does not separately consider other performance development issues (such as NVH) in series mode except for economical development.

Method used

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  • Series working condition control system and method for hybrid electric vehicle
  • Series working condition control system and method for hybrid electric vehicle
  • Series working condition control system and method for hybrid electric vehicle

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Experimental program
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Embodiment 1

[0062] Such as image 3 Shown is a schematic flow chart of a method for controlling series operating conditions of a hybrid electric vehicle provided by an embodiment of the present invention. image 3 The method shown includes the following steps:

[0063] S1: According to the engine universal characteristic map, under the current engine demand power request, select the idle speed with the lowest fuel consumption rate as the target idle speed, and use the target idle speed as the initial target idle speed;

[0064] Figure 4 In the figure, the horizontal axis is the engine speed; the vertical axis is the engine output torque; the black contour line in the figure is the fuel consumption rate curve; the thick dotted line is the generator efficiency (indicating the generator input power to output power efficiency ); the black dotted line represents the engine power curve; the black thick solid line represents the optimal fuel consumption curve of the engine, which comprehensiv...

Embodiment 2

[0122] Such as figure 2 As shown, the present embodiment provides a control system for hybrid electric vehicles in series, including: a noise sensor, a high-voltage battery power sensor, an engine speed sensor, a vehicle speed sensor, and a noise sensor, a high-voltage battery power sensor, and an engine speed sensor. , VECU controller connected to the vehicle speed sensor;

[0123] Among them, the noise sensor is used to measure the noise in the cab; the high-voltage battery power sensor is used to measure the high-voltage battery power; the engine speed sensor is used to measure the engine speed; the vehicle speed sensor is used to measure the vehicle speed; the VECU controller is used to perform the following operations:

[0124] According to the engine universal characteristic map, under the current engine demand power request, select the idle speed with the minimum fuel consumption rate as the target idle speed, and use the target idle speed as the initial target idle sp...

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Abstract

The invention discloses a series working condition control system and method for a hybrid electric vehicle, and belongs to the technical field of hybrid power, and the series working condition of the hybrid electric vehicle is controlled by designing series mode control of the series-parallel hybrid electric vehicle to control the target idling speed of series mode engine operation, the rising and falling gradient of the rotating speed, the starting and stopping conditions of the engine and the noise sound pressure level alarm logic, the economical efficiency and the NVH performance of the series-parallel hybrid electric vehicle in the series mode can be optimized. According to the system and the method, the economical efficiency and the NVH performance are considered at the same time, and series mode development of the hybrid electric vehicle can be effectively guided.

Description

technical field [0001] The invention belongs to the technical field of hybrid power, and more specifically relates to a system and method for controlling serial working conditions of a hybrid power vehicle. Background technique [0002] Parallel hybrid electric vehicle has both traditional internal combustion engine and pure electric vehicle motor to drive the vehicle, which reduces the demand for petroleum fuel, improves the fuel economy of the vehicle, can effectively reduce the fuel consumption of the vehicle, and alleviate the energy crisis. Generally, a hybrid hybrid vehicle has two driving modes: series mode (determines whether the engine starts according to the high-voltage battery capacity and driving power requirements); parallel mode (if the required driving power is small, rely on the engine to drive the car; if the required driving power large, relying on the drive motor and engine to jointly drive the car); among them, the target idle speed of the engine in seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/17B60W20/15
CPCB60W20/17B60W20/15B60W2510/242B60W2510/0638B60W2520/10Y02T10/62
Inventor 陈孔武许朋涛解鹏左茂良杨楠
Owner DONGFENG MOTOR GRP
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