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System and method for controlling pump performance in a transmission

A technology of controller and hydraulic system, which is applied in the direction of transmission, transmission control, fluid transmission, etc., which can solve the problems of filling clutch unnecessary time delay, affecting fuel economy and shifting quality, and increasing hydraulic demand, etc.

Active Publication Date: 2015-12-23
ALLISON TRANSMISSION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, regardless of any modifications made to the pump and transmission system, the hydraulic demand will rise before the pump can supply the required flow, thereby causing an undesired delay in filling the clutch
This can affect fuel economy and shift quality

Method used

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  • System and method for controlling pump performance in a transmission
  • System and method for controlling pump performance in a transmission
  • System and method for controlling pump performance in a transmission

Examples

Experimental program
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Embodiment Construction

[0033] The embodiments of the invention described below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following detailed description. Rather, the embodiments were chosen and described so that others skilled in the art can understand and understand the principles and practice of the invention.

[0034] now refer to figure 1 , a block and schematic diagram of one illustrative embodiment of the vehicle system 100 having the drive unit 102 and the transmission 118 is shown. In the illustrated embodiment, drive unit 102 may include an internal combustion engine, a diesel engine, an electric motor, or other power generating device. The drive unit 102 is configured to rotatably drive an output shaft 104 that is coupled to an input or pump shaft 106 of a conventional torque converter 108 . The input or pump shaft 106 is coupled to an impeller or pump 110 that is rotatably driven by the output shaft 104 of the drive unit 102 . The ...

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PUM

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Abstract

The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.

Description

technical field [0001] The present invention relates to a transmission control system, and in particular, to a system and method for controlling pump performance in a transmission. Background technique [0002] In conventional power machines, prime movers can operate at different speeds and produce different levels of power that are transmitted to the transmission. In one instance, the prime mover may be an engine. In turn, the transmission can transmit torque to a drive train or final drive assembly that can be mounted directly to the wheels or tracks of the power machine. The transmission can include an internal pump that can be rotationally driven by the prime mover, and based on the different speeds of the prime mover, the pump can produce different levels of fluid flow and pressure. In some cases, there is only one internal pump in the transmission, which provides fluid flow to the transmission's main pressure circuit and lube oil circuit. [0003] Conventional hydra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/38F16H61/42F16H61/431F16H41/24
CPCF16H57/04F16H57/0413F16H57/0434F16H57/0435F16H57/0446F16H61/0021F16H61/0025F16H61/0265F16H2061/0037
Inventor C·F·朗C·T·泰勒
Owner ALLISON TRANSMISSION INC
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