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dual piston actuator

A piston and clutch plate technology, applied in fluid-driven clutches, non-mechanical-driven clutches, clutches, etc., can solve the problem of large axial space for clutches

Active Publication Date: 2018-03-06
AMERICAN AXLE & MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there are usually many plates in a clutch, this means that the total axial space in the clutch can be quite large

Method used

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Examples

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Embodiment Construction

[0016] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0017] Refer to the attached figure 1 , an exemplary vehicle, generally indicated at 10 , having a clutch actuatable by a power transmission component constructed in accordance with the teachings of the present disclosure. Vehicle 10 may have a powertrain 14 and a driveline or driveline 18 . The powertrain 14 may be constructed in a conventional manner and may include a power source 22 and a transmission 26 . Power source 22 may be configured to provide propulsion and may include, for example, an internal combustion engine and / or an electric motor. The transmission 26 can receive propulsion power from the power source 22 and can output power to the driveline 18 . The transmission 26 may have multiple automatically or manually selected gear ratios. The driveline 18 in the particular example provided is an all-wheel drive configuration, but those skilled in the art will...

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Abstract

The present disclosure relates to a dual piston actuator. The present disclosure also relates to a power transmission component, which may include a friction clutch, a hydraulic cylinder, and an actuator. The actuator may include first and second pistons and an elastic member. When the pressure in the first chamber is less than a predetermined pressure and the second piston translates in a first direction, the elastic member may translate the first piston to provide a volume of fluid at a low pressure to the cylinder. When the pressure is equal to or greater than the predetermined pressure and the second piston translates in the first direction, the elastic member is compressible between the first piston and the second piston to allow relative movement between the pistons. When the pressure in the first chamber is equal to or greater than the predetermined pressure and the second piston translates in the first direction, the second piston supplies a small amount of fluid at high pressure to the oil cylinder.

Description

technical field [0001] The present disclosure relates to a dual piston actuator for a split vehicle driveline. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] Hydraulically operated clutches generally include pistons that apply force to the clutch system to engage the clutch plates. In order to have low parasitic drag when the clutch is open, clearance is required between the plates rotating relative to each other. Since there are usually many plates in a clutch, this means that the total axial space in the clutch can be quite large. Therefore, in order to achieve maximum disengagement of the clutch plates to achieve a lower drag torque, the piston must be retracted a considerable distance from the point of engagement. Typically, in order for the piston to move from the fully retracted position to engage the clutch plates, the piston must first take up the entirety of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D25/12
CPCF16D25/12F16D2121/02F16D25/08F16D29/005F16D48/02F16D2025/081F16D2048/0212F16D25/083F16D48/06F16D2121/04
Inventor 詹姆斯·P·唐斯保罗·J·瓦伦特
Owner AMERICAN AXLE & MFG
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