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Hydraulic control system for automatic transmission with electronic transmission range selection

A technology of hydraulic control system and automatic transmission, applied in the direction of transmission control, components with teeth, transmission parts, etc., can solve problems such as damage and unintentional occurrence

Active Publication Date: 2019-08-06
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Default conditions may have been commanded intentionally (e.g. when diagnostics indicate bad solenoid driver, bad controller, controller shutdown at high temperature) or may be due to hardware failure (e.g. controller failure, wiring harness failure, solenoid drive failure) appears unintentionally

Method used

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  • Hydraulic control system for automatic transmission with electronic transmission range selection
  • Hydraulic control system for automatic transmission with electronic transmission range selection
  • Hydraulic control system for automatic transmission with electronic transmission range selection

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Embodiment Construction

[0015] The following description is merely exemplary in nature, and is not intended to limit the present disclosure, application, or use.

[0016] reference figure 1 , A motor vehicle is shown, and is generally represented by the reference letter M. The motor vehicle M shown is a passenger car, but it is understood that it may be any type of vehicle, such as a truck, a truck, a sports utility vehicle, and the like. The motor vehicle M includes a powertrain 10. It is also understood that when the rear-wheel drive powertrain is shown, the motor vehicle M may have a front-wheel drive powertrain without departing from the scope of the present invention. The powertrain 10 generally includes an engine 12 connected to an automatic transmission 14.

[0017] Without departing from the scope of the present disclosure, the engine 12 may be a conventional internal combustion engine or an electric engine, a hybrid engine, or any other type of prime mover. The engine 12 provides driving torqu...

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PUM

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Abstract

Hydraulic control systems for multi-speed motor vehicle automatic transmissions with Electronic Transmission Range Select (ETRS) provide forward gear ratios and park options by default, where the transmission loses electronic control when the ETRS system is in drive mode. The hydraulic control system includes a two-position default inhibit solenoid valve, ETRS valve, parking servo, position sensor, default inhibit valve, drive select valve, various ports and blow-off valves, and main and auxiliary pumps, torque converter, A torque converter regulator and control valve, as well as a plurality of linear force solenoid valves and a clutch regulator valve that controls the same plurality of clutch and brake actuators.

Description

Technical field [0001] The present disclosure relates to a hydraulic control system for a motor vehicle automatic transmission, and more particularly to a hydraulic control system for a motor vehicle automatic transmission with electronic transmission range selection (ETRS), which defaults to a preselected gear . Background technique [0002] The statements in this section are only intended to provide background information related to the present disclosure, and may or may not constitute prior art. [0003] Modern automatic transmissions for motor vehicles, especially modern automatic transmissions for passenger cars, sport utility vehicles and light trucks, typically include a plurality of interconnected planetary gear assemblies, the interconnected planetary gear assemblies and friction clutches and brakes The device cooperates to provide forward and reverse gear sequences. As typically, the clutches and brakes are controlled by hydraulic actuators or operators who are controll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/40
CPCF16H61/0031F16H57/0412F16H61/0021F16H61/0206F16H61/14F16H63/3483F16H2061/0253F16H2061/1232F15B15/2815F16H61/0025
Inventor C·S·吉克B·W·韦特马什J·H·冈德森
Owner GM GLOBAL TECH OPERATIONS LLC