HYBRID DRIVE OF A HYBRID VEHICLE

• US 20110168476A1
• Filed: 01/03/2011
• Published: 07/14/2011
• Est. Priority Date: 01/11/2010
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Hurmer, Paul
• Granted Patent: US 8,437,135 B2
• Time in Patent Office: Days
• US Class Current: 180/291
• CPC Class Codes: B60K 6/22 characterised by apparatus, components or means specially adapted for HEVs

Abstract

A hybrid drive has first and second electrical machines (12, 11) and an energy store (13). A converter (14) is assigned to the energy store (13). First and second converters (16, 15) are assigned to the first and second electrical machines (12, 11) and combine to form a modular unit (17) with a basic module (18) and a supplementary module (19). The basic module (18) has the first converter (16), cooling connections (20, 21), fasteners (24) for attachment to a body, a connection (22) for the converter (14) of the energy store (13) and a connection (23) for the first electrical machine. The supplementary module (19) is coupled to the basic module (18) and has the second converter (15) and a connection (25) the second electrical machine (11). The supplementary module (19) is cooled via the basic module (18) and coupled to the converter (14) of the energy store (13).

Claims

1. A hybrid drive of a hybrid vehicle, with an internal combustion engine, at least first and second electrical machines and an electrical energy store that is discharged when at least one of the electrical machines is operated as a motor and is charged when at least one of the electrical machines is operated as a generator, a converter being assigned to the electrical energy store, and first and second converters being assigned respectively to the first and second electrical machines, wherein:

a) the first and second converters assigned to the first and second electrical machines are combined to form a modular converter unit;

b) the modular converter unit having a basic module with the first converter assigned to a first electrical machine, connections for cooling the converter unit, fastening means for attaching the converter unit to a body structure, a connection for making electrical contact with the converter assigned to the electrical energy store, and a connection for making electrical contact with the first electrical machine;

c) the modular converter unit further has at least one supplementary module that can be coupled to the basic module, the supplementary module having the second converter which is assigned to a second electrical machine and a connection for making electrical contact with the second electrical machine, the supplementary module further being capable of being coupled to the basic module so that the respective supplementary module can be cooled via the basic module, can be attached to the body structure via the basic module and can be coupled electrically to the converter of the electrical energy store via the basic module.

2. The hybrid drive of claim 1, wherein the basic module has fastening means with dampers for attaching the converter unit in damping fashion to the body structure.

3. The hybrid drive of claim 1, wherein the basic module has a cooling element connected to the connections and accommodating a flow of coolant for cooling the converter unit of the basic module and the converter of the supplementary module.

4. The hybrid drive of claim 1, wherein the supplementary module and the basic module have housings that are connected mechanically so that a connection is produced between interiors of the housings.

5. The hybrid drive of claim 4, further comprising a pressure compensation valve assigned to the housing of the basic module and ventilating the interior of the basic module and the interior of the supplementary module that is coupled to the basic module for achieving pressure compensation.