HYBRID DRIVE SYSTEM FOR VEHICLE HAVING ENGINE AS PRIME MOVER

• US 20110083918A1
• Filed: 09/14/2010
• Published: 04/14/2011
• Est. Priority Date: 09/15/2009
• Status: Abandoned Application

• Current Assignee: KPIT Technologies Ltd.
• Original Assignee: KPIT Cummins Infosystems Limited
• Inventors: Kshatriya, Tejas Krishna
• Application Number:
  US12/882,003
• Publication Number:
  US 20110083918A1
• Time in Patent Office: Days
• US Class Current: 180/65.26
• CPC Class Codes: B60H 1/004 for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
• 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 2001/0416 Arrangement in the rear part of the vehicle
• CPC Class Codes: B60K 6/28 characterised by the electric energy storing means, e.g. batteries or capacitors
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/445 Temperature
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/15 Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 2050/146 Display means
• CPC Class Codes: B60W 2510/0604 Throttle position
• CPC Class Codes: B60W 2510/0638 : Engine speed
• CPC Class Codes: B60W 2510/0671 : Engine manifold pressure
• CPC Class Codes: B60W 2510/0676 : Engine temperature
• CPC Class Codes: B60W 2510/087 : Temperature
• CPC Class Codes: B60W 2510/244 : Charge state
• CPC Class Codes: B60W 2510/246 : Temperature
• CPC Class Codes: B60W 2520/10 : Longitudinal speed
• CPC Class Codes: B60W 2540/12 : Brake pedal position
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A hybrid vehicle is disclosed. The hybrid vehicle comprises a prime mover having an output shaft. The output shaft has a first end and an opposite second end. The hybrid vehicle also comprises a transmission coupled to the first end of the output shaft, a first energy storage device, an alternator coupled to the second end of the output shaft and configured to power one or more electrical systems of the vehicle and charge the first energy storage device, a motor coupled to the second end of the output shaft and configured to assist the prime mover in rotating the output shaft, a second energy storage device configured to provide power to the motor and a motor control unit configured to control the amount of power delivered from the energy storage device to the motor.

Claims

1. A hybrid vehicle comprising:

a prime mover having an output shaft, the output shaft having a first end and an opposite second end;

a transmission coupled to the first end of the output shaft;

a first energy storage device;

an alternator coupled to the second end of the output shaft and configured to power one or more electrical systems of the vehicle and charge the first energy storage device;

a motor coupled to the second end of the output shaft and configured to assist the prime mover in rotating the output shaft;

a second energy storage device configured to provide power to the motor; and

a motor control unit configured to control the amount of power delivered from the second energy storage device to the motor.

2. The vehicle of claim 1 wherein the prime mover comprises an internal combustion engine.

3. The vehicle of claim 1 wherein the motor comprises a 3-phase induction motor.

4. The vehicle of claim 1 wherein the first energy storage element comprises a 12 volt lead-acid battery.

5. The vehicle of claim 4 wherein the second energy storage element comprises a plurality of 12 volt lead-acid batteries coupled in a series arrangement.

6. The vehicle of claim 1 wherein the motor is coupled to the prime mover via a pulley system.

7. The vehicle of claim 6 wherein the pulley system comprises a first pulley rotatably coupled to the second end of the output shaft, a second pulley rotatably coupled to the alternator, a third pulley rotatably coupled to the motor, a first belt extending between the first pulley and the second pulley and a second belt extending between the first pulley and the third pulley.

8. The vehicle of claim 7 further comprising an air conditioning system including a compressor, the compressor rotatably supporting a fourth pulley, and wherein a third belt extends between the third pulley and the fourth pulley so that the motor is configured to drive the compressor.

12. The hybrid drive system of claim 1 wherein the electric motor is configured to be coupled to the internal combustion engine via a pulley system.

13. The hybrid drive system of claim 12 wherein the pulley system comprises a first pulley configured to be rotatably coupled to the crankshaft, a second pulley configured to be rotatably coupled to the alternator, a third pulley configured to be rotatably coupled to electric motor, a first belt configured to extend between the first pulley and the second pulley and a second belt configured to extend between the first pulley and the third pulley.

9. A hybrid drive system for a vehicle having an internal combustion engine, a transmission, an alternator and a battery, the hybrid drive system comprising:

an electric motor having an output shaft configured to be coupled to a crankshaft of the internal combustion engine on a side of the engine opposite a transmission coupling, the electric motor configured to provide assistance to the internal combustion engine in rotating the crankshaft;

an energy storage element configured to provide power to the electric motor, wherein the energy storage element is separate from the battery of the vehicle; and

a motor control unit configured to control the amount of power delivered from the energy storage element to the electric motor.

10. The hybrid drive system of claim 9 wherein the electric motor comprises at least one of a 3-phase induction motor and a DC brushless motor.

11. The hybrid drive system of claim 9 wherein the energy storage element comprises a plurality of 12 volt lead-acid batteries coupled in a series arrangement.

14. A hybrid vehicle comprising:

a prime mover having a first output shaft, the first output shaft having a first end and an opposite second end;

a transmission coupled to the first end of the output shaft;

a motor having a second output shaft, the second output shaft coupled to the second end of the first output shaft such that the second output shaft is substantially coaxial with the first output shaft, the motor configured to selectively assist the prime mover in rotating the output shaft;

a first energy storage device;

an alternator coupled to the second end of the output shaft of the prime mover and configured to power one or more electrical systems of the vehicle and charge the first energy storage device;

a second energy storage device configured to provide power to the motor; and

a motor control unit configured to control the amount of power delivered from the second energy storage device to the motor.

15. The vehicle of claim 14 wherein the prime mover comprises an internal combustion engine.

16. The vehicle of claim 14 wherein the motor comprises a 3-phase induction motor.

17. The vehicle of claim 14 wherein the motor comprises a DC brushless motor.

18. The vehicle of claim 14 wherein the first energy storage device comprises a 12 volt lead-acid battery.

19. The vehicle of claim 14 wherein the first energy storage device comprises at least one of a lithium-ion battery and a nickel-metal-hydride battery.

20. The vehicle of claim 18 wherein the second energy storage device comprises a plurality of 12 volt lead-acid batteries coupled in a series arrangement.

21. The vehicle of claim 14 wherein the second output shaft is coupled to the first output shaft via a shaft coupling.

22. The vehicle of claim 21 wherein the shaft coupling is a universal joint coupling.

23. The vehicle of claim 22 further comprising pulley coupling to the second end of the second output shaft, the pulley supporting a belt.

24. The vehicle of claim 23 wherein the belt is coupled to at least one of a pulley for an air conditioning compressor and a pulley for the alternator.