Vehicle Drive Device

• US 20120080286A1
• Filed: 09/20/2011
• Published: 04/05/2012
• Est. Priority Date: 09/24/2010
• Status: Abandoned Application

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Kasuya, Satoru, Kitou, Masashi, Seki, Yuichi, Takahashi, Yusuke, Sugisaka, Shigeru
• Application Number:
  US13/137,869
• Publication Number:
  US 20120080286A1
• Time in Patent Office: Days
• US Class Current: 192/113.3
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/40 characterised by the assembly or relative disposition of components
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16D 25/123 in view of cooling and lubrication
• CPC Class Codes: H02K 7/006 Structural association of a motor or generator with the drive train of a motor vehicle
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

A vehicle drive device configured with an input member drivably coupled to an internal combustion engine, an output member drivably coupled to wheels, and a friction engagement device that selectively drivably couples the input member and the output member to each other. A rotary electric machine is connected between the input member and the output member. A housing oil chamber houses at least friction members of the friction engagement device and is filled with oil. A housing space houses the rotary electric machine, a first oil passage through which oil is supplied to the housing oil chamber, a second oil passage through which oil is discharged from the housing oil chamber; and a third oil passage through which oil discharged from the second oil passage is supplied to the housing space.

Claims

1. A vehicle drive device, comprising:

an input member drivably coupled to an internal combustion engine;

an output member drivably coupled to wheels;

a friction engagement device that selectively drivably couples the input member and the output member to each other;

a rotary electric machine provided on a power transfer path connecting between the input member and the output member;

a housing oil chamber that houses at least friction members of the friction engagement device and that is filled with oil;

a housing space that houses the rotary electric machine;

a first oil passage through which oil is supplied to the housing oil chamber;

a second oil passage through which oil is discharged from the housing oil chamber; and

a third oil passage through which oil discharged from the second oil passage is supplied to the housing space.

2. The vehicle drive device according to claim 1, wherein

the third oil passage includes an oil supply portion that supplies oil to a coil end portion of a stator of the rotary electric machine from above the stator, an axial oil passage extending in an axial direction from a connection portion at which the third oil passage is connected to the second oil passage, and a radial oil passage extending in a radial direction to communicate between the axial oil passage and the oil supply portion.

3. The vehicle drive device according to claim 2, wherein:

the oil supply portion includes a tubular member provided above the stator to extend in the axial direction; and

a supply opening portion that opens toward the coil end portion is provided in the tubular member at a position overlapping the coil end portion as viewed in the radial direction.

4. The vehicle drive device according to claim 1, further comprising:

a case that houses at least the rotary electric machine and the friction engagement device;

a rotor support member that supports a rotor of the rotary electric machine and that surrounds the friction engagement device from both sides in the axial direction and from an outer side in the radial direction so that the housing oil chamber is formed inside the rotor support member; and

a support bearing that supports the rotor support member with respect to the case in the radial direction, wherein

the third oil passage includes a bearing supply oil passage extending from a connection portion at which the third oil passage is connected to the second oil passage toward the support bearing, and a bearing discharge oil passage through which oil discharged from the support bearing is supplied to the housing space.

5. The vehicle drive device according to claim 1, further comprising:

a case that houses at least the rotary electric machine and the friction engagement device and that is provided adjacent to the rotary electric machine in the axial direction to extend at least in the radial direction;

an oil collection portion provided to a rotor support member that supports a rotor of the rotary electric machine and formed to open radially inward; and

a fourth oil passage through which oil is supplied from the oil collection portion to a coil end portion of a stator of the rotary electric machine disposed in the housing space, wherein;

the third oil passage is provided in the support wall, and includes a third oil passage opening portion that opens toward a side of the rotary electric machine; and

the third oil passage opening portion is provided radially inwardly of the oil collection portion.

6. The vehicle drive device according to claim 5, further comprising:

a rotation sensor including a sensor stator fixed to the support wall and a sensor rotor disposed radially outwardly of the sensor stator and fixed to a side surface of the rotor support member on a side of the support wall, wherein;

the third oil passage opening portion is provided in a surface of the support wall that abuts against the sensor stator; and

an axial through hole that penetrates through the sensor stator in the axial direction is provided in the sensor stator at a position overlapping the third oil passage opening portion as viewed in the axial direction.

7. The vehicle drive device according to claim 6, wherein

the oil collection portion is formed between the sensor rotor and the rotor support member.