Apparatus and method for operating accessories of vehicle during engine stop using one-way clutch pulley

Patent metadata

Field	Value
Publication number	US-2020001698-A1
Application number	US-201816204256-A
Country	US
Kind code	A1
Filing date	Nov 29, 2018
Priority date	Jun 29, 2018
Publication date	Jan 2, 2020
Grant date	—

Abstract

Disclosed is an apparatus and method for operating vehicular accessories during an engine stop using a one-way clutch pulley, the apparatus including the one-way clutch pulley configured to drive the vehicular accessories, and including a coupler and a one-way clutch. The one-way clutch pulley includes an engine crank shaft configured to connect to an engine of a vehicle; the coupler configured to couple with the engine crank shaft; the one-way clutch configured to couple with the coupler; and a pulley configured to connect to the one-way clutch, and the one-way clutch is configured to connect to the pulley and to rotate in one direction.

First claim

What is claimed is:

1 . An apparatus for operating vehicular accessories during an engine stop using a one-way clutch pulley, the apparatus comprising:
the one-way clutch pulley configured to drive the vehicular accessories, and comprising a coupler and a one-way clutch.

2 . The apparatus of claim 1 , wherein the one-way clutch pulley comprises:
an engine crank shaft configured to connect to an engine of a vehicle; the coupler configured to couple with the engine crank shaft; the one-way clutch configured to couple with the coupler; and a pulley configured to connect to the one-way clutch, and the one-way clutch is configured to connect to the pulley and to rotate in one direction.

3 . The apparatus of claim 2 , wherein the one-way clutch is configured to operate by overrunning of an inner ring or overrunning of an outer ring and to independently drive the pulley and the engine crank shaft.

4 . The apparatus of claim 1 , further comprising:
a motor generator configured to rotate the pulley, wherein the motor generator is configured to operate while an engine of a hybrid vehicle is in a stop state, to rotate the pulley, and to operate the vehicular accessories based on power of the engine.

5 . A one-way clutch pulley comprising:
an engine crank shaft configured to connect to an engine of a vehicle; a coupler configured to couple with the engine crank shaft; a one-way clutch configured to couple with the coupler; and a pulley configured to connect to the one-way clutch, wherein the one-way clutch is configured to connect to the pulley and to rotate in one direction.

6 . The one-way clutch pulley of claim 5 , wherein the one-way clutch is configured to operate by overrunning of an inner ring or overrunning of an outer ring such that the pulley and the engine crank shaft independently operate.

7 . The one-way clutch pulley of claim 6 , wherein the one-way clutch is configured to operate by overrunning of the inner ring, and
the pulley and the engine crank shaft are enabled to independently operate by way of the one-way clutch in such a manner that the coupler is in a salient structure, the salient structure couples with the inner ring of the one-way clutch, and the pulley is connected to the outer ring of the one-way clutch.

8 . The one-way clutch pulley of claim 6 , wherein the one-way clutch is configured to operate by overrunning of the outer ring, and
the pulley and the engine crank shaft are enabled to independently operate by way of the one-way clutch in such a manner that the coupler receives at least a portion of the one-way clutch to couple with the outer ring of the one-way clutch and the pulley is connected to the inner ring of the one-way clutch.

9 . The one-way clutch pulley of claim 5 , further comprising:
a motor generator configured to rotate the pulley, wherein the motor generator is configured to operate while an engine of a hybrid vehicle is in a stop state, to rotate the pulley and to operate vehicular accessories based on power of the engine.

10 . The one-way clutch pulley of claim 9 , wherein an inner ring and an outer ring of the one-way clutch are configured to be separate from each other when a speed difference between the inner ring and the outer ring is greater than a specific speed, and
the pulley and the engine crank shaft are configured to independently operate in such a manner that, when the engine of the vehicle is stopped, the pulley rotates through driving of the motor generator to rotate the outer ring of the one-way clutch connected to the pulley and to stop the inner ring of the one-way clutch.

11 . The one-way clutch pulley of claim 9 , wherein an inner ring and an outer ring of the one-way clutch are configured to be separate from each other when a speed difference between the inner ring and the outer ring is greater than a specific speed, and
the pulley and the engine crank shaft are configured to independently operate in such a manner that, when the engine of the vehicle is stopped, the pulley rotates through driving of the motor generator to rotate the inner ring of the one-way clutch connected to the pulley and to stop the outer ring of the one-way clutch.

12 . The one-way clutch pulley of claim 9 , wherein an inner ring and an outer ring of the one-way clutch are configured to mechanically engage with each other when a speed difference between the inner ring and the outer ring is less than a specific speed, and
the inner ring and the outer ring of the one-way clutch are configured to mechanically engage with each other and rotate together in such a manner that, when the engine of the vehicle is started using a separate starter, a rotational speed of the engine crank shaft connected to the engine of the vehicle increases to be higher than a rotational speed of the pulley.

13 . The one-way clutch pulley of claim 9 , wherein the motor generator comprises a low level motor configured to drive the one-way clutch and the vehicular accessories without driving the engine crank shaft.

14 . The one-way clutch pulley of claim 5 , wherein the pulley comprises a single and one-way fan belt pulley.

15 . A method of driving vehicular accessories during an engine stop using a one-way clutch pulley, the method comprising:
driving a motor generator when an engine of a vehicle is stopped; rotating a pulley through driving of the motor generator; and rotating a one-way clutch connected to the pulley in one direction, wherein the motor generator is configured to operate while the engine of the vehicle is in a stop state, to rotate the pulley and to operate the vehicular accessories based on power of the engine.

16 . The method of claim 15 , wherein the rotating of the one-way clutch comprises rotating an outer ring of the one-way clutch connected to the pulley in one direction, and
the pulley and an engine crank shaft are enabled to independently operate by way of the one-way clutch in such a manner that a coupler is in a salient structure, the salient structure couples with an inner ring of the one-way clutch, and the pulley is connected to the outer ring of the one-way clutch, and the pulley and the engine crank shaft are enabled to independently operate in such a manner that, when a speed difference between the inner ring and the outer ring of the one-way clutch is greater than a specific speed, the inner ring and the outer ring of the one-way clutch are separate from each other and the inner ring of the one-way clutch stops instead of rotating.

17 . The method of claim 15 , wherein the rotating of the one-way clutch comprises rotating an inner ring of the one-way clutch connected to the pulley in one direction, and
the pulley and an engine crank shaft are enabled to independently operate by way of the one-way clutch in such a manner that a coupler receives at least a portion of the one-way clutch to couple with an outer ring of the one-way clutch and the pulley is connected to the inner ring of the one-way clutch, and the pulley and the engine crank shaft are enabled to independently operate in such a manner that, when a speed difference between the inner ring and the outer ring of the one-way clutch is greater than a specific speed, the inner ring and the outer ring of the one-way clutch are separate from each other and the inner ring of the one-way clutch stops instead of rotating.

18 . The method of claim 15 , further comprising:
mechanically engaging and rotating an inner ring and an outer ring of the one-way clutch together in such a manner that, when the

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Jang Ingwun
• Kum Dongsuk
• Kim Kyung-Soo
• Jang Kitae
• Lee Changwoo
• Kim Jong Ho
• Choi Kyunghwan
• Kim Mingi

Classifications

• F02B67/04

  of mechanically-driven auxiliary apparatus · CPC title

• B60W20/40

  Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers {(power-up or power-down of the driveline B60W30/192)} · CPC title

• F16D41/06

  with intermediate wedging coupling members between an inner and an outer surface (F16D41/02, F16D41/24 take precedence) · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• F16H55/36

  Pulleys (with features essential for adjustment F16H55/52) · CPC title