US 10,808,777 B2Granted

Friction engagement device

AssigneeHonda Motor Co., Ltd.

InventorsKenji Niwata, Motonobu Ikari, Sachi Fujinuma

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Abstract

The friction engagement device connects the input shaft and the output shaft to transmit a driving force from a driving source from the input shaft to the output shaft. The friction engagement device includes a housing, a friction engagement portion, a piston, an oil pump, and a motor. The housing is disposed between the input shaft and the output shaft. The friction engagement portion is disposed in the housing and composed of a plurality of friction components. The piston is disposed at one side of the friction engagement portion for pressing the friction engagement portion. The oil pump is used to operate the piston. The motor is used to drive the oil pump. In the friction engagement device, abnormal wear of the friction components of the friction engagement portion is detected by monitoring a value of an operation parameter of the friction engagement device.

Claims7

Dependent claims

A friction engagement device, connected to an input shaft and an output shaft to transmit a driving force from a driving source from the input shaft to the output shaft, wherein the friction engagement device comprises:

a housing, disposed between the input shaft and the output shaft;
a friction engagement portion, disposed in the housing and composed of a plurality of friction components;
a piston, disposed on one side of the friction engagement portion for pressing the friction engagement portion;
an oil pump, for operating the piston;
and
a motor, for driving the oil pump;
wherein in the friction engagement device, a value of an operation parameter of the friction engagement device is monitored, and abnormal wear of the friction components of the friction engagement portion is detected when a difference between the value of the operation parameter being monitored and a predetermined reference value of the operation parameter being monitored exceeds a preset value, and
wherein the operation parameter of the friction engagement device comprises a current value of the motor for driving the oil pump.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/185,021Filed 9 Nov 2018
Published: US 2020/0149599 A114 May 2020
Granted: 20 Oct 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F16D 48/066
Control by electric or electronic means, e.g. of fluid pressure: control of fluid pressure, e.g. using an accumulator
F16D 13/38
With axially-movable clutching members: with flat clutching surfaces, e.g. discs
F16D 25/0638
With flat friction surfaces, e.g. discs: with more than two discs, e.g. multiple lamellae
F16D 48/06
External control of clutches: control by electric or electronic means, e.g. of fluid pressure