Method and control device for operating a hybrid vehicle
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorsThomas Rauner, Thomas Beck, Francesco Piccolo
Life of this patent
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Abstract
A method for operating a hybrid vehicle, wherein the hybrid vehicle has an electric engine, an electric traction energy accumulator interacting with the electric engine, an internal combustion engine, and a fuel tank interacting with the internal combustion engine, includes starting from a purely electric driving mode in which the internal combustion engine is shut down and in which a shut-off valve of the fuel tank is closed, opening the shut-off valve of the fuel tank and starting up the internal combustion engine depending on defined operating conditions. The defined operating conditions include a current charging state of the traction energy accumulator and a current pressure in the fuel tank.
Claims12
A method for operating a hybrid vehicle, wherein the hybrid vehicle has an electric engine, an electric traction energy accumulator interacting with the electric engine, an internal combustion engine, and a fuel tank interacting with the internal combustion engine, the method comprising:
- operating the hybrid vehicle in a purely electric driving mode in which a required driving power is delivered solely by the electric engine, in which the internal combustion engine is shut down, and in which a shut-off valve of the fuel tank is closed;
- determining that defined operating conditions are present;
- and
- in response to determining that the defined operating conditions are present, interrupting the purely electric driving mode by opening the shut-off valve of the fuel tank and starting up the internal combustion engine to burn fuel vapor,
- wherein the defined operating conditions include a current charging state value of the traction energy accumulator being greater than a first limit value and a current pressure in the fuel tank being greater than a second limit value, and
- wherein the first limit value is a charging state value sufficient to provide the required driving power solely by the electric engine.
A control device for operating a hybrid vehicle, wherein the hybrid vehicle has an electric engine, an electric traction energy accumulator interacting with the electric engine, an internal combustion engine, and a fuel tank interacting with the internal combustion engine, the control device comprising:
- a controller configured to, when the vehicle is being operated in a purely electric driving mode in which a required driving power is delivered solely by the electric engine, in which the internal combustion engine is shut down, and in which a shut-off valve of the fuel tank is closed, determine that defined operating conditions are present, and in response to determining that the defined operating conditions are present, interrupt the purely electric driving mode by opening a shut-off valve of the fuel tank and starting up the internal combustion engine to burn fuel vapor,
- wherein the defined operating conditions include a current charging state value of the traction energy accumulator being greater than a first limit value and on a current pressure in the fuel tank being greater than a second limit value, and
- wherein the first limit value is a charging state value sufficient to provide the required driving power solely by the electric engine.
A method for operating a hybrid vehicle, wherein the hybrid vehicle has an electric engine, an electric traction energy accumulator interacting with the electric engine, an internal combustion engine, and a fuel tank interacting with the internal combustion engine, the method comprising:
- starting from a purely electric driving mode in which the internal combustion engine is shut down and in which a shut-off valve of the fuel tank is closed, opening the shut-off valve of the fuel tank and starting up the internal combustion engine depending on defined operating conditions,
- wherein the defined operating conditions include a current charging state of the traction energy accumulator and a current pressure in the fuel tank,
- wherein when the current charging state of the electric traction energy accumulator is greater than a first limit value and the current pressure in the fuel tank is greater than a second limit value, the shut-off valve is opened in order to vent the fuel tank and the internal combustion engine is started up in order to burn fuel vapor or hydrocarbon gas emerging from the fuel tank,
- wherein the defined operating conditions further include a current and/or future geodetic height or geodetic change in height, and
- wherein the future geodetic height or change in height is determined depending on data of a navigation system.
Dependencies are inferred from the claim text.