Drive system for hybrid electric vehicle

• US 5,667,029 A
• Filed: 05/31/1995
• Issued: 09/16/1997
• Est. Priority Date: 05/31/1995
• Status: Expired due to Fees

• Current Assignee: New York Institute of Technology Incorporated
• Original Assignee: New York Institute of Technology Incorporated
• Inventors: Urban, Edward F., Mavroudis, George E.
• Primary Examiner(s): Johnson, Brian L.
• Assistant Examiner(s): MAR, MICHAEL Y
• Application Number:
  US08/455,128
• Time in Patent Office: 839 Days
• Field of Search: 180/65.1, 180/65.2, 180/65.3, 180/65.4, 180/65.6, 180/65.7
• US Class Current: 180/65.23
• CPC Class Codes: B60K 26/02 of initiating means or elements
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/507 Operating parameters
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 2250/28 Accelerator pedal thresholds
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• 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 10/72 Electric energy management in electromobility

Abstract

A hybrid electric drive system for a vehicle having at least two drive wheels which receive torque from a primary drive shaft. The system includes an internal combustion engine which is operatively connected to a secondary drive shaft for delivering torque thereto, a transmission assembly for delivering torque to the primary drive shaft which has an input shaft that is operatively connected to the secondary drive shaft for receiving torque therefrom, and at least one electric motor which is operatively connected to the input shaft of the transmission assembly for delivering torque thereto.

Claims

1. A hybrid electric drive system for a vehicle having at least two drive wheels, the system comprising:

a) an internal combustion engine having a first output shaft and a second output shaft;

b) a first transmission assembly having an input shaft and an output shaft, the output shaft being operatively connected to a drive shaft, the drive shaft being connected to the drive wheels;

c) a second transmission assembly having an input and an output, the input being connected to the first output shaft of the internal combustion engine, the second transmission assembly being a continuously variable transmission;

d) a dynamotor operatively connected between the input shaft of the first transmission and the output of the second transmission;

e) a first clutch for selectively connecting the output of the second transmission to an input shaft of the dynamotor; and

f) a generator connected to the second output shaft of the internal combustion engine.

2. A hybrid electric drive system according to claim 1, wherein the first clutch is a solenoid clutch.

3. A hybrid electric drive system according to claim 1, wherein the second transmission is a pulley-type torque converter having an input pulley and an output pulley.

4. A hybrid electric drive system according to claim 3, further comprising a second clutch operatively associated with the output pulley.

5. A hybrid electric drive system according to claim 4, wherein the second clutch is an overrunning clutch.

6. A hybrid electric drive system according to claim 1, further comprising energy storage means for storing electric energy generated by the generator.

7. A hybrid electric drive system according to claim 6, wherein the energy storage means comprises a plurality of batteries.

8. A hybrid electric drive system according to claim 1, further comprising a differential gear assembly interconnecting the first transmission assembly and the drive shaft.