Transmission hydraulic control system having independently controlled stator cooling flow
A technology of hydraulic control system and transmission, which is applied in the direction of transmission control, components with teeth, gear lubrication/cooling, etc., and can solve the problems of changing and unimportant stator cooling flow
Active Publication Date: 2013-10-30
GM GLOBAL TECH OPERATIONS LLC
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- Abstract
- Description
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- Application Information
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Problems solved by technology
However, the amount of stator cooling flow required varies and is less important than providing the necessary fluid pressure to the line pressure and lubrication circuits
While existing hydraulic control systems are effective at providing stator cooling flow, they require sufficient pump power to provide fluid flow to all three circuits
Method used
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[0070] The following description is merely exemplary in nature and is not intended to limit the disclosure, its application, or uses in any way.
[0071] see figure 1 , an exemplary powertrain is indicated generally at 10 . The powertrain includes an engine 12 connected to a hybrid transmission 14 . Engine 12 may be a conventional internal combustion or electric engine, or any type of prime mover, without departing from the scope of the present disclosure. Additionally, other components such as hydrodynamic fluid drives (eg, torque converters and fluid couplings) may be disposed between the engine 12 and the hybrid transmission 14 without departing from the scope of the present disclosure. The engine 12 provides drive torque to a hybrid transmission 14 .
[0072] The hybrid transmission 14 includes a generally cast metal housing 16 that encloses and protects the various components of the hybrid transmission 14 . Housing 16 includes a number of apertures, channels, shoulder...
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A hydraulic control system includes a source of pressurized hydraulic fluid for providing a pressurized hydraulic fluid, a main line circuit in fluid communication with the source of pressurized hydraulic fluid, a regulation valve in communication with the source of pressurized hydraulic fluid, the regulation valve moveable between a plurality of positions, and a lubrication valve in communication with the regulation valve, the lubrication valve moveable between a plurality of positions. A lubrication circuit and a cooling circuit are in communication with the lubrication valve. The regulation valve allows pressurized hydraulic fluid to communicate with the lubrication valve after the main line circuit is saturated, the lubrication valve allows fluid communication between the regulation valve and the lubrication circuit until the lubrication circuit is saturated, and the lubrication valve allows fluid communication between the regulation valve and the cooling circuit and the lubrication circuit after the lubrication circuit is saturated.
Description
technical field [0001] The present disclosure relates to a transmission hydraulic control system having a cooling flow of hydraulic fluid to a stator that is controlled independently of lubrication flow and line pressure flow. Background technique [0002] The statements in this paragraph merely provide background information related to the present invention and may or may not constitute prior art. [0003] A typical automatic transmission in a motor vehicle includes a hydraulic control system that is used to actuate the various torque-transmitting devices and to provide cooling and lubrication to components of the transmission. These torque-transmitting devices may be, for example, friction clutches and brakes. Conventional hydraulic control systems typically include a main pump that provides pressurized fluid, such as oil, to a plurality of valves and solenoids within a valve body. The main pump may be driven by the motor vehicle's prime mover or an auxiliary electric mo...
Claims
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IPC IPC(8): F16H61/40F16H57/04B60K6/36B60K6/387
CPCF16H61/0021F16H57/0476Y02T10/76B60K6/48F16H57/0446F16H2061/0037Y02T10/6221B60K2006/4825Y02T10/62
Inventor C·S·吉克J·D·亨德里克森Z·谢T·约内彻克
Owner GM GLOBAL TECH OPERATIONS LLC