Vehicle having a belt pulley and standstill air-conditioning

Patent metadata

Field	Value
Publication number	US-9702330-B2
Application number	US-201414908807-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Jul 31, 2013
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A vehicle including a combustion engine, a belt alternator starter, and a decouplable accessory power take-off for auxiliary units, wherein the accessory power take-off includes, as auxiliary units, at least an air-conditioning compressor and an electric motor as belt alternator starter that is usable as a motor and as a generator, wherein a coupling and a decoupling of the accessory power take-off occurs by means of a form-fitting clutch, and wherein at a standstill of the combustion engine during a short stop phase, a stationary air-conditioning operation occurs by means of a reverse rotation of the auxiliary units, and wherein a starting of the combustion engine after the short stop phase occurs by means of a reversal of the direction of rotation of the electric motor.

First claim

What is claimed is:

1. A vehicle comprising:
a combustion engine;
a belt alternator starter; and,
a decouplable accessory power take-off for auxiliary units, wherein the accessory power take-off includes, as auxiliary units, at least an air-conditioning compressor and an electric motor as belt alternator starter that is usable as a motor and as a generator, wherein a coupling and a decoupling of the accessory power take-off occurs by means of a form-fitting clutch, and wherein at a standstill of the combustion engine during a short stop phase, a stationary air-conditioning operation occurs by means of a reverse rotation of the auxiliary units, and wherein a starting of the combustion engine after the short stop phase occurs by means of a reversal of the direction of rotation of the electric motor;
wherein the coupling and the decoupling of the accessory power take-off occurs by means of a switchable pawl freewheel.

2. The vehicle recited in claim 1 , wherein the switchable pawl freewheel comprises:
a switching device; and,
at least one generator pawl switchable from a locking position to a freewheel position by means of the switching device.

3. The vehicle recited in claim 2 , wherein the switchable pawl freewheel comprises:
a boost pawl that locks in a relative direction of rotation opposite a direction of rotation of the generator pawl.

4. The vehicle recited in claim 1 , wherein the belt alternator starter is combined with a pulley decoupler.

5. The vehicle recited in claim 1 , wherein a belt decoupler comprises a torsional vibration damper.

6. A method for operating the vehicle recited in claim 1 , wherein during the standstill of the combustion engine during the short stop phase, the stationary air-conditioning operation occurs by means of the reverse rotation of the auxiliary units, and wherein the starting of the combustion engine after the short stop phase occurs by means of the reversal of the direction of rotation of the electric motor.

7. The method recited in claim 6 , wherein a boost clutch is overrun in a freewheel-like way in the stationary air-conditioning operation.

8. The method recited in claim 6 , wherein a polarity of the electric motor, which is usable as a belt alternator starter, is changed when a start of the combustion engine is requested after the short stop phase.

9. The method recited in claim 7 , wherein a polarity of the electric motor, which is usable as a belt alternator starter, is changed when a start of the combustion engine is requested after the short stop phase.

10. The method recited in claim 8 , wherein a generator pawl is switched to its locking position after the start of the combustion engine.

11. The method recited in claim 9 , wherein a generator pawl is switched to its locking position after the start of the combustion engine.

Assignees

• Schaeffler Technologies Ag

Inventors

• Winkler Thomas
• Goeckler Mathias
• Kroll Juergen

Classifications

• F02N11/04

  the motors being associated with current generators · CPC title

• F02N11/003 Primary

  said electric motor being also used as a drive for auxiliaries, e.g. for driving transmission pumps or fuel pumps during engine stop · CPC title

• F02N11/084

  State of vehicle accessories, e.g. air condition or power steering · CPC title

• F02N2200/0806

  Air condition state · CPC title

• B60H1/3222

  characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives (B60H1/3208, B60H1/3226 take precedence) · CPC title