Accessory drive for vehicle with hybrid drive system

• US 20030116368A1
• Filed: 12/20/2001
• Published: 06/26/2003
• Est. Priority Date: 12/20/2001
• Status: Abandoned Application

• Current Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Winkelman, James R., Lou, Zheng, Bhatia, Kanwal, Brautigan, Jeffrey J., Breton, Mathew, Smith, Greg J., Smith, Marci, Donohue, William P.
• Application Number:
  US10/033,971
• Publication Number:
  US 20030116368A1
• Time in Patent Office: Days
• US Class Current: 180/65.2
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 2025/005 driven by electric motors forming part of the propulsion unit
• CPC Class Codes: B60K 6/383 One-way clutches or freewheel devices
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/54 Transmission for changing ratio
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: F04C 2240/45 Hybrid prime mover
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A vehicle drive system for a hybrid electric vehicle includes an engine, which includes a crankshaft assembly, and a motor, which includes a main rotor shaft. A first clutch selectively engages the crankshaft assembly and the main rotor shaft. The vehicle drive system also includes a transmission, which includes an input shaft, and second clutch which selectively engages the main rotor shaft and the transmission input shaft. An accessory drive mechanism is driven by the main rotor shaft and drives a vehicle accessory. The accessory may be an air conditioning compressor and include a clutch coupled between the accessory drive mechanism and the compressor.

Claims

1. A vehicle drive system comprising:

an engine having a crankshaft for outputting torque;

a motor/generator having a stator, and a rotor rotationally mounted within the stator, with the rotor including a main rotor shaft;

a first clutch coupled to the crankshaft on a first side and the main rotor shaft on a second side, for selectively coupling the engine crankshaft to the main rotor shaft;

a transmission, having a main input shaft;

a second clutch coupled to the main rotor shaft on a first side and the transmission main input shaft on a second side, for selectively coupling the main rotor shaft to the transmission input shaft;

an accessory input shaft;

an accessory drive mechanism coupled between the main rotor shaft and the accessory input shaft; and

a rotationally driven vehicle accessory coupled to the accessory input shaft.

2. The vehicle drive system of claim 1 wherein the vehicle accessory is an air conditioning system compressor.

3. The vehicle drive system of claim 2 further including an accessory clutch coupled between the accessory input shaft and the compressor.

4. The vehicle drive system of claim 3 wherein the accessory clutch is a one-way clutch and the transmission is a continuously variable transmission.

5. The vehicle drive system of claim 1 further including an accessory clutch coupled between the accessory input shaft and the vehicle accessory.

6. The vehicle drive system of claim 1 wherein the transmission is a continuously variable transmission.

7. The vehicle drive system of claim 1 further including a second accessory input shaft operatively engaging the main rotor shaft, and a second vehicle accessory coupled to the second accessory input shaft.

8. The vehicle drive system of claim 7 further including a second accessory drive mechanism coupled between the second accessory input shaft and the accessory input shaft.

9. The vehicle drive system of claim 7 further including an accessory clutch coupled between the accessory input shaft and the vehicle accessory.

10. The vehicle drive system of claim 9 wherein the vehicle accessory is an air conditioning system compressor, and the second vehicle accessory is one of a water pump, a vacuum pump, a power steering pump, an air pump, and an oil pump.

11. The vehicle drive system of claim 7 wherein the vehicle accessory is an air conditioning system compressor, and the second vehicle accessory is one of a water pump, a vacuum pump, a power steering pump, an air pump, and an oil pump.

12. The vehicle drive system of claim 1 wherein the accessory drive mechanism is a gear assembly.

13. The vehicle drive system of claim 1 wherein the accessory drive mechanism is a pulley and belt assembly.

14. The vehicle drive system of claim 1 wherein the accessory drive mechanism is a sprocket and chain assembly.

15. A vehicle drive system comprising:

an engine having a crankshaft for outputting torque;

a motor/generator having a stator, and a rotor rotationally mounted within the stator, with the rotor including a main rotor shaft;

a first clutch coupled to the crankshaft on a first side and the main rotor shaft on a second side, for selectively coupling the engine crankshaft to the main rotor shaft;

a transmission, having a main input shaft;

a second clutch coupled to the main rotor shaft on a first side and the transmission main input shaft on a second side, for selectively coupling the main rotor shaft to the transmission input shaft;

an accessory input shaft;

an accessory drive mechanism coupled between the main rotor shaft and the accessory input shaft; and

an air conditioning system compressor coupled to the accessory input shaft.

16. The vehicle drive system of claim 15 further including an accessory clutch coupled between the accessory input shaft and the compressor.

17. The vehicle drive system of claim 16 wherein the accessory clutch is a one way clutch.

18. The vehicle drive system of claim 15 further including a second accessory input shaft operatively engaging the main rotor shaft, and a second vehicle accessory coupled to and driven by the second accessory input shaft.

19. The vehicle drive system of claim 15 further including a second accessory drive mechanism coupled between the second accessory input shaft and the accessory input shaft.

20. A vehicle drive system comprising:

an engine having a crankshaft for outputting torque;

a motor/generator having a stator, and a rotor rotationally mounted within the stator, with the rotor including a main rotor shaft;

a first clutch coupled to the crankshaft on a first side and the main rotor shaft on a second side, for selectively coupling the engine crankshaft to the main rotor shaft;

a continuously variable transmission, having a main input shaft;

a second clutch coupled to the main rotor shaft on a first side and the transmission main input shaft on a second side, for selectively coupling the main rotor shaft to the transmission input shaft;

an accessory input shaft;

an accessory drive mechanism coupled between the main rotor shaft and the accessory input shaft; and

a rotationally driven vehicle accessory coupled to the accessory input shaft.