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Overheat protection control method for dual-clutch automatic transmission

An automatic transmission and overheating protection technology, applied in the field of transmission, can solve vehicle safety hazards, cannot solve problems such as clutch overheating, and achieve the effects of improving accuracy, improving experience, and increasing safety

Active Publication Date: 2020-04-28
XIAN JIRUN AUTOMOBILE MFG CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above method has the following defects: the slight movement of the vehicle may be ignored by the driver, resulting in the inability to solve the situation of clutch overheating, which makes the vehicle a potential safety hazard

Method used

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  • Overheat protection control method for dual-clutch automatic transmission
  • Overheat protection control method for dual-clutch automatic transmission
  • Overheat protection control method for dual-clutch automatic transmission

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Embodiment Construction

[0036] In order to make the technical problems, technical solutions and advantages solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] Such as figure 1 , 2 As shown in and 3, when the vehicle crawls on a slope for a long time, the gearbox control system obtains the road inclination α and the preset inclination β1 through the set sensor to compare and identify the slope crawling condition. When α>β1, the gearbox control system The temperature TC1 and TC2 of the clutches C1 and C2 are monitored. If any one of TC1 and TC2 rises to the temperature T1, the transmission control system controls the electronic parking control system and controls the engine control system to enter the clutch ramp protection mode...

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Abstract

The invention provides an overheating protection control method for a dual-clutch automatic transmission, and relates to the field of transmissions. The method solves the problem that how to improve the safety of a vehicle when the dual-clutch automatic transmission is overheated. The method comprises the following steps: when a vehicle crawls on a ramp for a long time, a gearbox control system identifies the ramp crawling working condition by comparing the road inclination angle alpha with a preset inclination angle beta1; when alpha is greater than beta1, the gearbox control system monitorsthe temperature TC1 of a clutch C1 and the temperature TC2 of a clutch C2, and the gearbox control system is provided with a plurality of preset temperatures; and if any one of the TC1 and the TC2 rises to one of the preset temperatures, the gearbox control system controls the clamping force of an electronic parking control system to reach a corresponding preset calibration value and meanwhile controls an engine control system to enter a corresponding clutch ramp protection mode, and the instrument prompts that the clutch is overheated. The vehicle safety during long-time crawling can be improved, and the driving experience can be improved.

Description

technical field [0001] The invention relates to the field of transmissions, in particular to an overheat protection control method for a dual-clutch automatic transmission. Background technique [0002] Dual-clutch automatic transmission (DCT) contains two automatically controlled clutches C1 and C2, which are electronically controlled and hydraulically driven, and can simultaneously control the operation of two sets of clutches. DCT has the advantages of high transmission efficiency, short shifting time, and uninterrupted power; however, due to the lack of a hydraulic torque converter structure, DCT is prone to slipping when the clutch plate is in a slipping state for a long time during low-speed and long-slope crawling conditions. Overheating leads to thermal attenuation and even ablation of the clutch plate. Usually, when the clutch is overheated, the vehicle will forcibly disengage the clutch to prevent damage to the clutch plate, but forcibly disengaging the clutch will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/186B60W10/02B60W10/06B60W10/10B60W10/18B60W50/14
CPCB60W10/02B60W10/06B60W10/10B60W10/182B60W30/186B60W50/14B60W2510/0291
Inventor 沈国华边淑伟柳鹏飞林中正王亮
Owner XIAN JIRUN AUTOMOBILE MFG CO LTD
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