Invention Grant
- Patent Title: Method for controlling an automatic transmission of a motor vehicle after a cold start and transmission system
- Patent Title (中): 在冷启动和传输系统之后控制机动车辆的自动变速器的方法
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Application No.: US13026748Application Date: 2011-02-14
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Publication No.: US08777810B2Publication Date: 2014-07-15
- Inventor: Hans Kleila
- Applicant: Hans Kleila
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Ingrassia Fisher & Lorenz, P.C.
- Priority: DE102010007987 20100215
- Main IPC: F16H59/78
- IPC: F16H59/78 ; B60W10/06 ; B60W10/10

Abstract:
A method is provided for controlling an automatic transmission of a motor vehicle, in which the engine speed is limited after a cold start and a normal shift point is used for shifting to the next higher gear of the automatic transmission in the case of an average operating temperature of an engine, before the average operating temperature is reached, a cold shift point being used for shifting to the next higher gear of the automatic transmission, in the case of which upshifting is performed at a lower vehicle velocity than in the case of the normal shift point. Upshifting into the next higher gear of the automatic transmission can be made easier, since upshifting can already be performed at lower vehicle velocities and therefore lower engine speeds in the cold start phase.
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