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

Impact management system and method for vehicle power train

A vehicle power and management system technology, applied in the field of impact management system of vehicle power transmission system, can solve the problems of vehicle impact, sacrifice of vehicle dynamic response, etc., to achieve the effect of reducing crossing impact, improving drivability, and satisfying dynamic response

Active Publication Date: 2019-04-12
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
View PDF8 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, when the driver accelerates again, when the engine speed is higher than the speed of the transmission input shaft, the vehicle changes from the backward dragging state to the driving state. Due to the transmission system clearance, elastic deformation, hydraulic components and suspension, the speed of the transmission input shaft beating, resulting in vehicle impact
[0003] In order to solve this kind of impact, the usual method is to reduce the engine torque rise rate during acceleration, and the torque rise rate will be limited when the accelerator pedal is stepped on, but it will sacrifice the dynamic response of the whole vehicle

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
  • Impact management system and method for vehicle power train
  • Impact management system and method for vehicle power train
  • Impact management system and method for vehicle power train

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a shock management method for a power train of a vehicle. The vehicle includes an engine, a torque converter, and an automatic transmission. The automatic transmission is connected to the engine through the torque converter. The hydraulic The torque converter includes a clutch, the shock management method is:

[0043] Firstly, comprehensively judge whether the vehicle is in the reverse drag state according to the engine running state, the gear position of the automatic transmission, and the position of the accelerator pedal. When the clutch is in an open or slippery state, the engine speed drops below the speed of the input shaft of the automatic transmission. When accelerating again, it is judged to adopt different torque control methods according to the difference between the speed of the engine speed and the speed of the input shaft of the automatic transmission. When the speed difference is small, the crossing impact is small, and the engine...

Embodiment 2

[0078] Embodiment 2 of the present invention provides a shock management system for a power transmission system, the shock management system includes:

[0079] Reversing state judging module: used to judge whether the vehicle is in the reversed state, and trigger the clutch state judging module when the vehicle is in the reversed state. The judging method of the backward dragging state judging module is: judging whether the engine is running with the accelerator pedal lifted, if the engine is running with the accelerator pedal lifted, the backward dragging state judging module triggers the The above clutch state judging module. Optionally, the judging method of the backward drag state judging module is: judging whether the speed of the engine is lower than the speed of the input shaft of the automatic transmission, if the speed of the engine is lower than the speed of the input shaft of the automatic transmission, the judgment module of the backward drag state Trigger the clu...

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 an impact management method for a vehicle power train. A vehicle comprises an engine, a hydraulic torque converter and an automatic transmission; the automatic transmission isconnected with the engine through the hydraulic torque converter; and the hydraulic torque converter comprises a clutch. The method comprises the following steps that whether the vehicle is in a reverse-towing state is determined; if the vehicle is in the reverse-towing state, whether the clutch is in an open or slip state is determined; if the clutch is in the open or slip state, whether an accelerator pedal of the vehicle is in a treaded state is determined; if the accelerator pedal of the vehicle is in the treaded state, whether a difference value between the rotation speed of an automatictransmission input shaft and the rotation speed of the engine is greater than a preset value is determined; and if the difference value is greater than the preset value, a torque crossing control process of the engine is started. By implementing the impact management method provided by the invention, the dynamic response is achieved, crossing impact is reduced, and the driving performance of thewhole vehicle is improved.

Description

technical field [0001] The present invention relates to a vehicle power transmission system, in particular to a shock management system and method for a vehicle power transmission system. Background technique [0002] An automatic transmission with a torque converter will have the clutch open or slipping in low gears. When the vehicle is coasting, the speed of the input shaft of the transmission drops slowly because the vehicle drags the drive train backwards; the engine enters idle speed control, and the speed of the engine drops below the input shaft of the transmission quickly, taking the target idle speed as the control target to decrease. At this time, when the driver accelerates again, when the engine speed is higher than the speed of the transmission input shaft, the vehicle changes from the backward dragging state to the driving state. Due to the transmission system clearance, elastic deformation, hydraulic components and suspension, the speed of the transmission inp...

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 Applications(China)
IPC IPC(8): F16H61/04F16H63/50
CPCF16H61/04F16H63/502
Inventor 马希利张德旺李岩
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD