Hybrid vehicle
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorsNils Sauvlet, Thomas Rauner
Life of this patent
Estimating the term…
Abstract
A hybrid vehicle with an internal-combustion engine and an electric motor has a tank ventilation system that includes a fuel tank and a suction pipe leading from a filtering device, which can be regenerated, to the intake path of the internal-combustion engine. A control device is configured to actuate different valve devices for flushing the filtering device, so that ambient air can be fed to the internal-combustion engine through the filtering device and the suction pipe. In addition, the control device is configured such that, during purely electric operation of the hybrid vehicle, it connects the internal-combustion engine as a function of the loading condition of the filtering device or of the flushing gas concentration.
Claims19
A hybrid vehicle, comprising:
- an internal-combustion engine;
- an electric motor;
- a fuel tank;
- a tank ventilation pipe that leads from the fuel tank into the environment;
- a first valve device incorporated into the tank ventilation pipe for selectively opening or shutting off communication between the fuel tank and the environment;
- a filtering device that can be regenerated, the filtering device being arranged in the tank ventilation pipe between the fuel tank and the first valve device;
- a suction pipe leading from the filtering device to an intake path of the internal-combustion engine;
- a second valve device arranged in the suction pipe between the filtering device and the intake path;
- a control device constructed such that, for flushing the filtering device, the control device actuates the first and second valve devices whereby ambient air can be fed through the tank ventilation pipe, the filtering device and the suction pipe to the internal-combustion engine and, as a result, hydrocarbons present in the pipes and in the filtering device can be fed to the internal-combustion engine for combustion;
- and
- the control device is further constructed such that, in an electric operation of the hybrid vehicle, the control device switches on the internal-combustion engine as a function of a loading condition of the filtering device.
The hybrid vehicle comprising:
- an internal-combustion engine;
- an electric motor;
- a fuel tank;
- a tank ventilation pipe that leads from the fuel tank into the environment
- a first valve device incorporated into the tank ventilation pipe for selectively opening or shutting off communication between the fuel tank and the environment;
- a filtering device that can be regenerated, the filtering device being arranged in the tank ventilation pipe between the fuel tank and the first valve device;
- a suction pipe leading from the filtering device to an intake path of the internal-combustion engine;
- a second valve device arranged in the suction pipe between the filtering device and the intake path;
- a control device constructed such that, for flushing the filtering device, the control device actuates the first and second valve devices whereby ambient air can be fed through the tank ventilation pipe, the filtering device and the suction pipe to the internal-combustion engine and, as a result, hydrocarbons present in the pipes and in the filtering device can be fed to the internal-combustion engine for combustion;
- and
- the control device is further constructed such that, in an electric operation of the hybrid vehicle, the control device switches on the internal-combustion engine as a function of a loading condition of the filtering device.
- a vacuum accumulator is-provided in the intake path of the internal-combustion engine;
- and wherein
- when the first and second valve devices are open, the vacuum accumulator permits flushing of the filtering device when the internal-combustion engine is switched off.
A tank ventilation system for a hybrid vehicle having an internal combustion engine and an electric motor, said ventilation system comprising:
- a fuel tank ventilation pipe;
- a regenerable filter situated in the fuel tank ventilation pipe;
- a suction pipe leading from the filtering device to an intake path of the internal combustion engine;
- a valve situated in said suction pipe, between the filtering device and the intake path of the internal combustion engine;
- a control unit that is configured to actuate the valve for regenerating the filter, whereby ambient air flows through the ventilation pipe, the filter and the suction pipe to the internal combustion engine, and hydrocarbons in the pipes and in the filter are flushed into the internal combustion engine;
- and
- the control unit is further configured to start said internal combustion engine as a function of a loading condition of the filter, during electric operation of the hybrid vehicle.
Dependencies are inferred from the claim text.