DRIVE TRAIN FOR A HYBRID ELECTRIC VEHICLE AND A METHOD OF OPERATING SUCH A DRIVE TRAIN
First Claim
1. A method of operating a drive train for a hybrid electric vehicle, the drive train comprising an internal combustion engine, a first electrical machine and electrical energy store, the internal combustion engine coupled to drive the first electrical machine as a generator and the first electrical machine connected to supply electrical energy to the electrical energy store, the electrical energy store arranged for supplying electrical energy to at least a second electrical machine for driving wheels of a hybrid electric vehicle, the method comprising the steps of sensing a parameter indicative of the voltage across the electrical energy store and, in response to this sensed parameter, controlling the internal combustion engine and/or the first electrical machine such that the first electrical machine operates to give rise to a voltage output of the first electrical machine such that the electrical energy store is charged without the need for power electronics.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of operating a drive train (110) for a hybrid electric vehicle, and a drive train, is disclosed. The drive train comprises an internal combustion engine (120), a first electrical machine (130) and electrical energy storage means (150). The internal combustion engine is coupled to drive the first electrical machine as a generator and the first electrical machine connected to supply electrical energy to the electrical energy storage means. The electrical energy storage means is arranged for supplying electrical energy to at least a second electrical machine (170) for driving wheels (180) of a hybrid electric vehicle. The method comprises the steps of sensing a parameter indicative of the voltage across the electrical energy storage means and, in response to this sensed parameter, controlling the internal combustion engine and/or the first electrical machine such that the first electrical machine operates to give rise to a voltage output of the first electrical machine such that the electrical energy storage means is charged without the need for power electronics.
15 Citations
27 Claims
- 1. A method of operating a drive train for a hybrid electric vehicle, the drive train comprising an internal combustion engine, a first electrical machine and electrical energy store, the internal combustion engine coupled to drive the first electrical machine as a generator and the first electrical machine connected to supply electrical energy to the electrical energy store, the electrical energy store arranged for supplying electrical energy to at least a second electrical machine for driving wheels of a hybrid electric vehicle, the method comprising the steps of sensing a parameter indicative of the voltage across the electrical energy store and, in response to this sensed parameter, controlling the internal combustion engine and/or the first electrical machine such that the first electrical machine operates to give rise to a voltage output of the first electrical machine such that the electrical energy store is charged without the need for power electronics.
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Specification