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Patent Searching and Data


Title:
DRIVE UNIT FOR CONTROLLING AN ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/184336
Kind Code:
A3
Abstract:
The present invention relates to a drive unit for controlling an engine. In particular, the present invention relates to an improved controller for starting an internal combustion engine which is designed for driving a traction generator coupled to the engine. The disadvantage is known from the prior art that the potential energy made available by a battery during the process of starting an engine is not sufficient if the battery is designed only to provide a relatively low supply voltage, for instance. The problem addressed by the present invention is therefore that of providing an improved and simpler drive unit for controlling and starting an engine which makes reliable starting of the engine possible and thereby requires only a minimal circuit engineering adaptation to the existing engine and drive unit in a vehicle. The problem is solved with a drive unit (100) comprising: a current converter (20), which can be connected to a work machine (50) comprising an intermediate circuit (6) which can be coupled to a first inverter (2) and to a second inverter (4), wherein the first inverter (2) is designed to be connectable on the alternating current side to a motor (54) and is connected on the direct current side to the intermediate circuit (6) and wherein the second inverter (4) is connected on the direct current side to the intermediate circuit (6) and can be connected on the alternating current side to the work machine (50) and wherein the second inverter (4) is designed to control the work machine (50) in such a manner that the work machine (50) can be operated either as a motor or as a generator; a connection to at least one energy store (10); a switching unit (8, 13) which is connected to the current converter (20) wherein the switching unit (8, 13) can be operated in a first operating mode or in a second operating mode, wherein in the first operating mode the switching unit (8, 13) is designed to couple the current converter (20) to the at least one energy store (10) to allow an energy flow from the at least one energy store (10) via the switching unit (8, 13) to the intermediate circuit of the current converter (20), and wherein in the second operating mode the switching unit (8, 13) is designed to isolate the current converter (20) from the at least one energy store (10), wherein the drive unit (100) comprises an energy store charging unit (12) which can be connected to the current converter (20) to make energy available to the energy store (10).

Inventors:
STEMMLER CHRISTOPH (CH)
VON HOFF THOMAS (CH)
EHRLER URS (CH)
Application Number:
PCT/EP2014/060056
Publication Date:
April 16, 2015
Filing Date:
May 16, 2014
Export Citation:
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Assignee:
ABB TECHNOLOGY AG (CH)
International Classes:
B60L11/18; B60L50/15; B60L50/16; B60W20/00; B61C3/02; F02N11/04
Foreign References:
US20120169114A12012-07-05
US20070124037A12007-05-31
US6486568B12002-11-26
US20050279242A12005-12-22
Attorney, Agent or Firm:
ABB PATENT ATTORNEYS (Intellectual Property CH-IPBrown Boveri Strasse 6, Baden, CH)
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