Pulse start method for an internal combustion engine of a hybrid vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorMichael Friedrich
Life of this patent
Estimating the term…
Abstract
A hybrid drive device has an internal combustion engine, a clutch transmission which has at least one free partial transmission and a partial transmission connected to an electric machine with in each case a clutch, and at least one electric machine. In order to start the internal combustion engine, pulse energy is provided from an inertia of the clutch associated with the free partial transmission and/or a rotation in the free partial transmission.
Claims14
A method for operating a hybrid drive apparatus of a motor vehicle, the hybrid drive apparatus comprising an internal combustion engine, a clutch transmission having at least one free component transmission and at least one electric component transmission with, in each case, at least one clutch, and at least one electric machine, the method comprising:
- a) opening the clutch of the free component transmission and the clutch of the electric component transmission for switching off the internal combustion engine, wherein the free component transmission is not used for driving the motor vehicle by torque from the internal combustion engine or the at least one electric machine;
- b) driving the motor vehicle via the electric component transmission;
- c) receiving an additional starting request for the internal combustion engine;
- and
- d) closing the clutch assigned to the free component transmission for starting the internal combustion engine;
- wherein
- pulse energy from an inertia of the clutch assigned to the free component transmission and/or a rotation in the free component transmission is provided for starting the internal combustion engine.
A hybrid drive apparatus of a motor vehicle, comprising:
- an internal combustion engine;
- a clutch transmission, having at least one free component transmission and one electric component transmission with, in each case, one clutch;
- and
- an electric machine which is arranged on the electric component transmission, wherein
- the free component transmission is not used for driving the motor vehicle by torque from the internal combustion engine or the electric machine, and
- pulse energy from inertia of the clutch which is assigned to the free component transmission and/or rotation in the component transmission is provided for starting of the internal combustion engine.
A motor vehicle, comprising:
- a hybrid drive apparatus which comprises an internal combustion engine, a clutch transmission and an electric machine, wherein the clutch transmission comprises a free component transmission and an electric component transmission with, in each case, a clutch, wherein the free component transmission is not used for driving the motor vehicle by torque from the internal combustion engine or the at least one electric machine,
- wherein the hybrid drive apparatus is configured to carry out the acts of:
- a) opening the clutch assigned to the free component transmission and the clutch assigned to the electric component transmission for switching off the internal combustion engine;
- b) driving the motor vehicle via the electric component transmission;
- c) receiving an additional starting request for the internal combustion engine;
- and
- d) closing the clutch assigned to the free component transmission for starting the internal combustion engine;
- wherein
- pulse energy from an inertia of the clutch assigned to the free component transmission and/or a rotation in the free component transmission is provided for starting the internal combustion engine.
Dependencies are inferred from the claim text.