Hybrid drive system

• US 5,492,189 A
• Filed: 11/22/1994
• Issued: 02/20/1996
• Est. Priority Date: 01/16/1992
• Status: Expired due to Term

• Current Assignee: AVL Gesellschaft Fur Verbrennungskraftmaschinen und Messtechnik mbH PROF Drdrhc HANS List
• Original Assignee: AVL Gesellschaft Fur Verbrennungskraftmaschinen und Messtechnik mbH PROF Drdrhc HANS List
• Inventors: Kriegler, Wolfgang, Reisinger, Erwin, Rasser, Michael
• Primary Examiner(s): Johnson, Brian L.
• Application Number:
  US08/347,101
• Time in Patent Office: 455 Days
• Field of Search: 180/65.2, 180/65.3, 180/65.6, 180/65.7, 180/65.8, 180/165, 318/139, 123/DIG. 8, 477/2, 477/3
• US Class Current: 180/65.23
• CPC Class Codes: B60K 6/12 by means of a chargeable fluidic accumulator
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• 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 6/445 Differential gearing distribution type
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• 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: F16H 2037/088 Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
• CPC Class Codes: F16H 2200/2005 with one sets of orbital gears
• CPC Class Codes: F16H 3/54 one of the central gears being internally toothed and the other externally toothed
• CPC Class Codes: F16H 3/727 with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path special adapted for a hybrid electric vehicle B60K6/20
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/91 Orbital, e.g. planetary gears
• CPC Class Codes: Y10S 903/914 Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/946 Characterized by control of driveline clutch

Abstract

A propulsion system includes an internal combustion engine predominantly operating in a steady-state mode and a driving engine operating in a transient mode, which act on the output shaft of a planetary gear train by first and second drive shafts. To obtain independent speed and torque values at the driven shaft, an additional transiently operating engine is provided which has a fixed r.p.m. ratio with the first drive shaft or the driven shaft of the planetary gear train. The two transient engines are configured as hydraulic engines or electric engines connected to a control device, a unit being provided for hydraulic or electric power flow between the two transient engines, which in turn is provided with an energy storage.

Claims

1. A hybrid drive system which comprises:

a planetary gear train having an output shaft,

a primary internal combustion engine capable of steady-state operation,

a primary drive shaft operatively connected between said primary internal combustion engine and said planetary gear train to rotate said output shaft,

a first auxiliary engine capable of transient operation,

a first auxiliary drive shaft operatively connected between said first auxiliary engine and said planetary gear train to rotate said output shaft,

a second auxiliary engine capable of transient operation at a fixed rpm ratio relative to an rpm of one of said primary drive shaft and said output shaft,

a second auxiliary drive shaft operatively connected between said second auxiliary engine and one of said primary drive shaft and said output shaft to rotate said output shaft,

a first control means connected to said primary internal combustion engine and each of said first and second auxiliary engines to control operation thereof, and

a second control means connected between said first and second auxiliary engines to control power flow therebetween, said second control means including an energy storage means.

2. A hybrid drive system according to claim 1, wherein said first and second auxiliary engines are electric engines and said energy storage means of said second control means is a battery.

3. A hybrid drive system according to claim 1, wherein said first and second auxiliary engines are hydraulic engines and said energy storage means of said second control means is a hydraulic storage means.

4. A hybrid drive system according to claim 1, including couplings between said planetary gear train and each of said primary internal combustion engine, said first auxiliary engine and said second auxiliary engine.

5. A hybrid drive system according to claim 1, including an additional gear connecting at least one of said first and second auxilliary engines with said planetary gear train.

6. A hybrid system according to claim 1, including couplings interconnected with said first and second auxiliary drive shafts for locking at least one of said first and second auxilliary drive shafts.

7. A hybrid system according to claim 1, including a coupling for connecting said second auxilliary shaft to said output shaft of said planetary gear train.

8. A hybrid drive system according to claim 1, with said planetary gear train comprising a sun gear connected to said primary drive shaft and a ring gear, wherein said primary internal combustion engine is connected via couplings to said sun gear, and said first auxilliary engine is connected via a first additional gear to said ring gear of said planetary gear train, and wherein said second auxilliary, engine acts on said primary drive shaft via a second additional gear.

9. A hybrid drive system according to claim 1, wherein said first control means is for partly automated operation of said hybrid drive system in a vehicle and includes a micro-processor unit storing characteristics of all elements of said hybrid drive system, sensor means connected to said microprocessor for registering a state of motion of said vehicle and charge conditions of said energy storage device, and an input means connected to said microprocessor for entering operational parameters from outside, said microprocessor unit being connected to control said primary internal combustion engine, said first and second auxiliar engines, and all couplings of said hybrid drive system.