DRIVE UNIT FOR MOTOR VEHICLES WITH HYBRID DRIVE IN A LONGITUDINAL ARRANGEMENT

• US 20090200094A1
• Filed: 09/27/2005
• Published: 08/13/2009
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Magna Steyr Fahrzeugtechnik AG & Company KG (Magna International Incorporated)
• Original Assignee: Magna Steyr Fahrzeugtechnik AG & Company KG (Magna International Incorporated)
• Inventors: Erjawetz, Konstantin, Zohrer, Franz, Pichler, Peter
• Granted Patent: US 7,661,495 B2
• Time in Patent Office: Days
• US Class Current: 180/65.220
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• 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 6/405 Housings
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2240/507 Operating parameters
• 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
• CPC Class Codes: Y10S 903/909 Gearing
• CPC Class Codes: Y10S 903/91 Orbital, e.g. planetary gears
• CPC Class Codes: Y10S 903/911 with two or more gear sets
• CPC Class Codes: Y10S 903/912 Drive line clutch
• CPC Class Codes: Y10S 903/916 with plurality of drive axles

Abstract

A drive unit for motor vehicles with hybrid drive and a drive train in a longitudinal arrangement, between the internal combustion engine and the first axle, comprising a housing piece, a through driveshaft, an electric motor, surrounding the through driveshaft with a first clutch before the electric motor and a second clutch thereafter, whereby a second axle is also to be driven with minimal space requirement. A first electric motor is thus physically combined with the first clutch, surrounding a second electric motor and the through driveshaft and is connected to the second axle by means of a third clutch, an offset gear and a shaft.

Claims

1. A drive unit for a motor vehicle with a hybrid drive and a drive train in a longitudinal arrangement, which drive train also comprises an internal combustion engine (1), a longitudinal shaft (9) for driving a first axle (7*), and a gear mechanism (6), and which drive unit is arranged between the internal combustion engine and the first axle and comprises a housing part, a through-drive shaft, an electrical machine surrounding the through-drive shaft and a first clutch upstream of and a second clutch (5) downstream of the electrical machine, characterized in that a first electrical machine (11) is structurally combined with the first clutch (3), and in that, for driving a second axle (17*), the drive unit comprises a second electrical machine (13), which surrounds the through-drive shaft (60), and is drive-connected to a shaft (16) leading to the second axle (17*) via a third clutch (14) and an offset drive (15).

2. The drive unit as claimed in claim 1, characterized in that the second electrical machine (13) is structurally combined with the third clutch (14).

3. The drive unit as claimed in claim 1 or 2, characterized in that the clutch (3;

14;

3, 14) is arranged within the electrical machine (11;

13;

11, 13).

4. The drive unit as claimed in claim 1, characterized in that the first electrical machine (11) and the second electrical machine (13) are each accommodated by a housing comprising a cylindrical casing (21, 23) and an axially normal wall (22, 24), and in that the cylindrical casings (21, 23) are screwed to one another.

5. The drive unit as claimed in claim 1, the electrical machine (11;

13) comprising a stator (25;

26) fixed in the housing and a rotor (27;

28), and the clutch (3;

14) in each case being a multi-plate clutch comprising an inner part (42;

67) and an outer part (43;

63), characterized in that the rotor (27;

28) is mounted in a bearing (54;

74) on the axially normal wall (22;

24) of the housing and has a replaceable coupling disk (46;

66), which is connected to the clutch outer part (43;

63) such that it is fixed against rotation, the clutch (3;

14) being arranged physically between the bearing (54;

74) and the coupling disk (46;

66).

6. The drive unit as claimed in claim 5, characterized in that, of the first clutch (3), the inner part (42) rests on a first shaft (40), which is drive-connected to the internal combustion engine (1), and in that the outer part (43) is connected to a second shaft (60) such that it is fixed against rotation, which second shaft (60) passes through the second electrical machine (13) and leads to the second clutch.

7. The drive unit as claimed in claim 5, characterized in that, of the third clutch (14), the inner part (67) is connected to a primary wheel (32) of the offset drive (15) such that it is fixed against rotation via a hollow shaft (68) and the outer part (43) is connected to the coupling disk (66) of the second electrical machine (13) such that it is fixed against rotation.

8. The drive unit as claimed in claim 4, characterized in that an actuator cylinder (52), which contains an annular piston (51), for the clutch (3;

14) is fixed to the axially normal wall (22;

24), and the annular piston (51) interacts with a contact-pressure plate (48) of the clutch (3;

14) via a thrust bearing (50).

9. The drive unit as claimed in claim 1, characterized in that the electrical machine (11;

13) has a rotation speed sensor (58), which is fixed to the axially normal wall (22;

24), and a rotation speed transmitter collar (57) is fitted to the rotor (55).