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A control method for switching a neutral gear of an automatic transmission during driving of a vehicle

A technology of automatic transmission and control method, applied in the direction of transmission control, components with teeth, belt/chain/gear, etc., can solve the problems of damage to the transmission, automatic transmission transmission system and clutch damage, and achieve the effect of avoiding damage

Active Publication Date: 2016-03-30
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if you change from neutral gear to forward gear again, the combination of the clutch will cause great damage to the transmission system of the automatic transmission and the clutch itself, and may damage the transmission in severe cases.

Method used

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  • A control method for switching a neutral gear of an automatic transmission during driving of a vehicle

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] During the driving process of the vehicle, due to the driver's misoperation, sometimes the gear will be shifted from the forward gear (hereinafter referred to as the D gear) to the neutral gear (hereinafter referred to as the N gear), and the neutral gear during the driving process of the vehicle It will not only damage the transmission but also pose a serious safety hazard. When the driver finds the misoperation, usually the gear will be returned to the D gear. However, because the vehicle was forced to switch to N gear during the previous driving process, the clutch was disengaged, the load on the engine disappeared, and the engine speed suddenly rose, which would be greater than the required speed of the target gear. system causing great damage. In view of this, the present invention proposes a control met...

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Abstract

The invention provides a control method of neutral position shifting of an automatic gearbox during vehicle traveling, which belongs to the technical field of a vehicle automatic gearbox. The control method comprises the following steps of detecting whether gear shifting requirement is met by vehicle state parameter or not when a vehicle is in a neutral position under a traveling state; and allowing the gear shifting if so, and regulating the vehicle state parameters to gear shifting required values if not, wherein the vehicle state parameter refers to the rotating speed of an engine. According to the control method provided by the invention, the problem that the rotating speed of the engine is overlarge when the vehicle is shifted from N gear to D gear after being shifted from D gear to N gear during a vehicle traveling process can be effectively prevented, and a transmission system of the automatic gearbox and a clutch are protected from being shocked by high rotating speed of the engine.

Description

technical field [0001] The invention belongs to the technical field of automatic transmissions for automobiles, and relates to a shift control method, in particular to a control method for switching neutral gears of an automatic transmission during vehicle running. Background technique [0002] At present, with the continuous improvement of the theory and development technology of automatic transmission, the demand for automatic transmission models in the market is also increasing. However, there are still some customer groups who still have some deficiencies in how to operate automatic transmission vehicles. They often switch to neutral gear during high-speed driving, and then switch back to forward gear in case of emergency. During driving, when the gear is shifted from forward gear to neutral gear, the clutch will be disengaged, so that the load on the engine will disappear, and the engine speed will suddenly rise, exceeding the speed required for gear shifting. At this ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/50F16H59/36F16H59/18F16H59/24F16H61/02
Inventor 郭磊金吉刚杨安志赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD