Unlock instant, AI-driven research and patent intelligence for your innovation.

Parallel power system and control method for hybrid electric vehicle

A technology of power system and hybrid power, which is applied in the field of parallel power system and its control, and can solve problems such as long power interruption time, failure to engage gear, hidden safety hazards, etc.

Active Publication Date: 2021-08-20
WEICHAI POWER CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The working characteristic of the engine is that it can only be maintained above the idle speed (such as 600rpm and above). When the engine speed drops to near the idle speed, the clutch of the whole vehicle will be forced to disengage, otherwise the engine will stall. At this time, the engine cannot participate in speed regulation. It can't work normally, and can't adjust the speed. If the motor has a speed at this time, it will fail to engage the gear. You can only wait until the motor speed naturally drops to zero to achieve the gear. This process has a long power interruption time, especially when the vehicle is running. There is a safety hazard when shifting gears on a slope

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Parallel power system and control method for hybrid electric vehicle
  • Parallel power system and control method for hybrid electric vehicle
  • Parallel power system and control method for hybrid electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0036] Specific embodiment one: gear shift starts, and the parallel power system enters the gear removal speed regulation state after the clearing operation is completed, otherwise continue to clear the twisting operation; remove gears and enter the speed regulation state, if the target output speed of the engine 10 is greater than the idle speed value, after the engine 10 adjusts the input speed of the motor 12 and the gearbox 13 to the target output speed, the gearbox 13 performs a gear operation, and if the engine 10 fails to regulate the speed of the motor 12 and the gearbox 13, parallel The power system returns to the gear removal state, and then enters the speed regulation state again until the engine 10 adjusts the input speed of the motor 12 and the gearbox 13 to the target output speed, during which the locking mechanism 15 does not act.

specific Embodiment 2

[0037] Specific embodiment two: gear shift starts, and the parallel power system enters the speed regulation state after the clearing operation is completed, otherwise continue to clear the twisting operation; remove the gear and enter the speed regulating state, if the target output speed of the engine 10 is not greater than the engine 10 idle speed value, the controller in the parallel power system controls the engine 10 to separate from the motor 12 in the parallel power system, and controls the locking mechanism 15 to reduce the speed of the motor 12 to the target output speed. When the speed of the motor 12 is less than or equal to the target output speed, the locking mechanism 15 returns to the initial state, and the parallel power system directly executes the gear shifting operation. If the gear shifting operation is unsuccessful, the parallel power system returns to the torque clearing operation, and then continues to perform gear removal, speed regulation, and gear shif...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of engines, in particular to a parallel power system for a hybrid electric vehicle and a control method thereof. The invention aims to solve the technical problem of high failure rate in the shifting process of the existing parallel power system. For this purpose, the present invention provides a kind of parallel power system that is used for hybrid motor vehicle, comprises engine, clutch, motor, gearbox and locking mechanism, and the input shaft of engine and motor is connected by clutch, and the output shaft of motor is connected by lock. The stop mechanism is selectively connected with the gearbox. The parallel power system for hybrid motor vehicles of the present invention can quickly reduce the speed of the motor to the target output speed through the locking mechanism when the motor breaks down and the engine is separated from the motor, thereby providing conditions for the gearbox to be in gear , and reduce the gearbox in-gear time.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a parallel power system for a hybrid electric vehicle and a control method thereof. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] Such as figure 1 As shown, the existing hybrid electric vehicle parallel system is composed of engine 10, clutch 11, drive motor 12, gearbox 13, drive shaft 14, and power battery. When the high-voltage system fails, the motor cannot work normally, and the engine acts as the only The power source drives the whole vehicle, which is called the engine mode at this time. When shifting gears, the engine adjusts the speed, and after the speed adjustment is completed, the gear is put into gear. [0004] The working characteristic of the engine is that it can only be maintained above the idle speed (such as 600rpm and above). When the engine speed dr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/10B60W20/00B60W40/00
CPCB60W10/06B60W10/10B60W20/00B60W40/00
Inventor 郭庆光吴学强张超袁文文乔运乾韩福强张强
Owner WEICHAI POWER CO LTD