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 the 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 such that the first electrical machine operates at a speed that gives 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 for a hybrid electric vehicle, and a drive train, is disclosed. The drive train includes an internal combustion engine, a first electrical machine and electrical energy storage. The 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. The electrical energy storage is arranged for supplying electrical energy to at least a second electrical machine for driving wheels of a hybrid electric vehicle. The method includes sensing a parameter indicating the voltage across the electrical energy storage and, in response to this sensed parameter, controlling the internal combustion engine and/or the first electrical machine such that the first electrical machine gives rise to a voltage output of the first electrical machine such that the electrical energy storage is charged without the need for power electronics.
14 Citations
22 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 the 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 such that the first electrical machine operates at a speed that gives rise to a voltage output of the first electrical machine such that the electrical energy store is charged without the need for power electronics.
- 21. 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 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 drive train further comprising a controller arranged to sense a parameter indicative of the voltage across the electrical energy store and, in response to the sensed parameter, control the internal combustion engine such that the first electrical machine operates at a speed that gives rise to a voltage output of the first electrical machine such that the electrical energy store is charged without the need for power electronics.
Specification