Accessory-driving equipment for an automotive vehicle

• US 6,863,139 B2
• Filed: 04/22/2003
• Issued: 03/08/2005
• Est. Priority Date: 05/10/2002
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Asai, Jiro, Egami, Tsuneyuki, Katoh, Tomoya
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): To, Toan C
• Application Number:
  US10/419,875
• Publication Number:
  US 20030209373A1
• Time in Patent Office: 686 Days
• Field of Search: 180/53.8, 180/293, 180/65.3, 477/3, 623/233, 623/234, 123/179.4
• US Class Current: 180/53.8
• CPC Class Codes: B60H 1/3222 characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives B60H1/3208, B60H1/3226 take precedence
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 2006/4833 Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: F02B 67/00 Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
• CPC Class Codes: F02N 11/003 said electric motor being also used as a drive for auxiliaries, e.g. for driving transmission pumps or fuel pumps during engine stop
• CPC Class Codes: F02N 11/04 the motors being associated with current generators
• CPC Class Codes: F02N 11/0814 comprising means for controlling automatic idle-start-stop
• CPC Class Codes: F02N 11/0866 comprising several power sources, e.g. battery and capacitor or two batteries
• CPC Class Codes: F02N 15/046 of the planetary type
• CPC Class Codes: F02N 2300/104 Control of the starter motor torque
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/91 Orbital, e.g. planetary gears
• CPC Class Codes: Y10S 903/945 Characterized by control of gearing, e.g. control of transmission ratio

Abstract

Accessory-driving equipment connects an engine having an idle stop system, a motor-generator and an accessory including an air-conditioner compressor that is driven even at a time when the idle stop system is operated. The accessory is driven by the engine when the engine is running and driven by the motor-generator when the idle stop system is operated. The accessory-driving equipment includes a first shaft for connecting to the engine, a second shaft for connecting to the motor-generator, a third shaft for connecting to the accessory, a lock device for locking the third shaft and a clutch. The clutch and the lock device are operated so that a torque transmitted from the engine through the first shaft is distributed to the motor-generator and the accessory, or a torque is transmitted from the motor-generator to the engine.

Claims

1. Accessory-driving equipment for an automotive vehicle, which connects an engine having an idle stop system, a motor-generator for an electric power generating operation and for an electric motor operation, and an accessory including an air-conditioner compressor that is driven even at a time when the idle stop system is operated, the accessory being driven by the engine when the engine is running and driven by the motor-generator when the idle stop system is operated, the equipment comprising:

a torque distribution system including a first shaft for connecting to the engine, a second shaft for connecting to the motor-generator, and a third shaft for connecting to the accessory;

a lock means for locking the third shaft; and

a clutch,

wherein the torque distribution system distributes a torque to the second shaft and the third shaft, the torque being transmitted from the engine through the first shaft, and transmits a torque from the second shaft to the first shaft, and

wherein the clutch disengageably connects any two of the three shafts among the first shaft, the second shaft, and the third shaft in the torque distribution system.

2. Accessory-driving equipment for an automotive vehicle, according to claim 1,

wherein the torque distribution system includes a planetary gear system.

3. Accessory-driving equipment for an automotive vehicle, according to claim 2,

wherein the planetary gear system includes a carrier, a sun gear, and a ring gear,

wherein the first shaft is connectable to the carrier,

wherein the second shaft is connectable to the sun gear, and

wherein the third shaft is connectable to the ring gear.

4. Accessory-driving equipment for an automotive vehicle, according to claim 1, further comprising:

a control unit,

wherein the control unit controls the clutch such that the clutch is disengaged when the engine is started or when the air-conditioner compressor is driven, and is engaged when the engine is running, and

wherein the control unit controls the lock means such that the lock means locks when the engine is started, and unlocks when the engine is running or when the air-conditioner compressor is driven.

5. Accessory-driving equipment for an automotive vehicle, according to claim 3,

wherein the planetary gear system has a gear ratio of the sun gear to the ring gear that is set in the range between 0.25 and 0.35.

6. Accessory-driving equipment for an automotive vehicle, according to claim 1,

wherein the torque distribution system is a differential gear system, Ravigneaux type planetary gear system, or a planetary roller system.

7. Accessory-driving equipment for an automotive vehicle, according to claim 1,

wherein the motor-generator and the torque distribution system are integrated so that a rotary electric machine with a torque distribution system is provided.

8. Accessory-driving equipment for an automotive vehicle, according to claim 1,

wherein the clutch, the lock means, the compressor, the motor-generator, and the torque distribution system are integrated so that an integrated rotary electric machine is provided.

9. Accessory-driving equipment for an automotive vehicle, according to claim 1,

wherein the motor-generator is a synchronous motor-generator.

10. Accessory-driving equipment for an automotive vehicle, according to claim 1,

wherein the lock means is a brake system.

11. Accessory-driving equipment for an automotive vehicle, which connects an engine having an idle stop system, a motor-generator for an electric power generating operation and for an electric motor operation, and an accessory including an air-conditioner compressor that is driven even at a time when the idle stop system is operated, the accessory being driven by the engine when the engine is running and driven by the motor-generator when the idle stop system is operated, the equipment comprising:

a torque distribution system including a first shaft for connecting to the engine, a second shaft for connecting to the motor-generator, and a third shaft for connecting to the accessory;

a lock means for locking the third shaft; and

a clutch,

wherein the clutch disengageably connects any two of the three shafts among the first shaft, the second shaft and the third shaft in the torque distribution system,

wherein the torque distribution system distributes a torque to the second shaft and the third shaft, the torque being transmitted from the engine through the first shaft, and transmits a torque from the second shaft to the first shaft, and

wherein the torque distribution system includes a planetary gear system that includes a carrier, a sun gear and a ring gear,

wherein the first shaft is connectable to the carrier,

wherein the second shaft is connectable to the sun gear, and

wherein the third shaft is connectable to the ring gear.

12. Accessory-driving equipment for an automotive vehicle, according to claim 11,

wherein the sun gear has a least gear teeth among the planetary gear system, and is fixed to the second shaft for connecting to the motor-generator that rotates high speed and small torque so that a reduction gear ratio of the motor-generator to the engine becomes large.

13. Accessory-driving equipment for an automotive vehicle, according to claim 12,

wherein the planetary gear system has a gear ratio of the sun gear to the ring gear that is set in the range between 0.25 and 0.35 so that a starting torque for starting the engine becomes large.