Method for operating a drive unit for a hybrid vehicle

A technology of hybrid electric vehicles and drive units, which is applied to the layout of multiple different prime movers of hybrid electric vehicles and general power plants, motor vehicles, etc.
CN104797449AInactive Publication Date: 2015-07-22ZF FRIEDRICHSHAFEN AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZF FRIEDRICHSHAFEN AG
Publication Date
2015-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for operating a drive unit for a hybrid vehicle, wherein the drive unit comprises a drive assembly (3) with an internal combustion engine (1) and an electrical machine (2) and a transmission (5) having a plurality of gearboxes (6, 7) connected between the drive assembly (3) and an output (4). The electrical machine (2) is coupled via a planetary gear unit (10) to an input shaft (8) of a first gearbox (6) and an input shaft (9) of a second gearbox (7) connected in parallel with said first gearbox (6). The internal combustion engine (1) can be coupled by means of a friction-fitting decoupler (11) to the input shaft (8) of the first gearbox (6) and when the decoupler (11) is closed is coupled together with the input shaft (8) of the first gearbox (6) to the same element (15) of the planetary gear unit (10), To couple the internal combustion engine (1) to the output (4) from travel under solely electrical power, the torque provided by the internal combustion engine (1) is transferred via the decoupler (11) operated in slipping mode, so that a shifting element previously closed during solely electrical operation is relieved and to disengaged in the relieved state.
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Description

technical field

[0001] The invention relates to a method for operating a drive unit for a hybrid vehicle. Background technique

[0002] A drive unit for a hybrid vehicle is known from DE 10 2006 059 591 A1, wherein the drive unit comprises a drive unit with an internal combustion engine and an electric machine and a transmission connected between the drive unit and an output. The transmission is designed as a dual clutch transmission and includes a plurality of sub-transmissions. The electric machine of the drive unit of the drive unit is coupled via a planetary gear to an input shaft of a first sub-transmission and an input shaft of a second sub-transmission parallel to the first sub-transmission. The internal combustion engine can be coupled via a friction-locking release clutch to the input shaft of the first sub-transmission and, with the release clutch engaged, the internal combustion engine can be coupled directly to the input shaft of one of the sub-transmissions. F...

Claims

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