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Hydraulic control system for an automatic transmission having default gears applied through a clutch hydraulic exhaust circuit

A hydraulic control system, clutch technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as undeveloped high-end versions and unusable solenoids

Active Publication Date: 2016-11-16
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these solenoids cannot be used in certain transmission configurations, and for some solenoid types, the usual taller versions have not been developed

Method used

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  • Hydraulic control system for an automatic transmission having default gears applied through a clutch hydraulic exhaust circuit
  • Hydraulic control system for an automatic transmission having default gears applied through a clutch hydraulic exhaust circuit
  • Hydraulic control system for an automatic transmission having default gears applied through a clutch hydraulic exhaust circuit

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Embodiment Construction

[0066] refer to figure 1 , a motor vehicle is shown and generally indicated by reference numeral 5 . The motor vehicle 5 is illustrated as a passenger car, but it should be understood that the motor vehicle 5 may be any type of vehicle, such as a truck, a minivan, a sport utility vehicle, or the like. Motor vehicle 5 includes an exemplary powertrain 10 . It should be understood at the outset that while a rear wheel drive powertrain is illustrated, motor vehicle 5 may have a front wheel drive powertrain without departing from the scope of the present invention. The powertrain 10 generally includes an engine 12 interconnected with a transmission 14 .

[0067] Engine 12 may be a conventional internal combustion engine, or an electric motor, a hybrid engine, or any other type of prime mover without departing from the scope of the present disclosure. The engine 12 may supply drive torque to the transmission 14 through a flexplate 15 or other connection to a starter 16 . The st...

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Abstract

The invention relates to a hydraulic control system for an automatic transmission having default gears applied through a clutch hydraulic exhaust circuit. A hydraulic control system for a transmission is provided. The hydraulic control system provides one or more default gears during a default condition when the transmission loses electronic control. The hydraulic control system includes a default enable valve, a default select valve, and a plurality of clutch regulation valves. The default enable valve and the default select valve feed hydraulic fluid through exhaust circuits to a set number of the clutch regulation valves during a default condition in order to provide a default gear ratio.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 62 / 157,270, filed May 5, 2015. The disclosures of the aforementioned applications are hereby incorporated by reference. technical field [0003] The present invention relates to hydraulic control systems for automatic transmissions, and more particularly, to hydraulic control systems for automatic transmissions configured to provide a default gear through a clutch hydraulic drain circuit. Background technique [0004] A typical automatic transmission includes a hydraulic control system for providing cooling and lubrication to components within the transmission and for actuating the various torque-transmitting devices. These torque transmitting devices may be, for example, friction clutches and brakes arranged with multiple gear sets or within a torque converter. Conventional hydraulic control systems typically include a main pump that provides pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/40
CPCF16H61/40F16H61/0267F16H61/0021F16H61/0276
Inventor B.W.怀特马什
Owner GM GLOBAL TECH OPERATIONS LLC
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