US 12,055,117 B2 · Method and device for operating a hybrid vehicle

Abstract

The disclosure relates to a method and a device for operating a hybrid vehicle having an internal combustion engine, an electric motor, a fuel tank, an activated carbon filter, an air filter, an intake tract, a purging line arranged between the activated carbon filter and the intake tract, a purge air pump arranged between the activated carbon filter and the intake tract, a tank purge valve arranged between the purge air pump and the intake tract, and a ventilation arranged between the fresh air filter and the activated carbon filter. The hybrid vehicle can be operated in an electric mode in which the electric motor is activated and the internal combustion engine is deactivated. In such a hybrid vehicle, in electric mode the purge air pump is activated and detection of the concentration of hydrocarbons present in the activated carbon filter is performed with the purge air pump activated.

Claims20

Dependent claims

A method for operating a hybrid vehicle which has an internal combustion engine, an electric motor, a fuel tank, an activated carbon filter, an air filter, an intake tract, a purging line arranged between the activated carbon filter and the intake tract, a purge air pump arranged between the activated carbon filter and the intake tract, a tank purge valve arranged between the purge air pump and the intake tract, and a ventilation valve arranged between the air filter and the activated carbon filter, the method comprising:

during an electric mode of operation:
activating the electric motor,
deactivating the internal combustion engine,
activating the purge air pump,
detecting a concentration of hydrocarbons present in the activated carbon filter while the purge air pump is activated,
regulating a speed of the purge air pump to a predetermined target speed,
opening the ventilation valve arranged between the air filter and the activated carbon filter, and
closing the tank purge valve.

5 more elements

A device for performing a method for operating a hybrid vehicle, the device comprising:

an internal combustion engine;
an electric motor;
a fuel tank;
an activated carbon filter;
an air filter;
an intake tract;
a purging line arranged between the activated carbon filter and the intake tract;
a purge air pump arranged between the activated carbon filter and the intake tract;
a tank purge valve arranged between the purge air pump and the intake tract;
a ventilation valve arranged between the air filter and the activated carbon filter;
and
a control unit configured to execute a method comprising:
during an electric mode of operation:
activating the electric motor,
deactivating the internal combustion engine,
activating the purge air pump,
detecting a concentration of hydrocarbons present in the activated carbon filter while the purge air pump is activated,
regulating a speed of the purge air pump to a predetermined target speed,
opening the ventilation valve arranged between the air filter and the activated carbon filter, and
closing the tank purge valve.

17 more elements

Dependencies are inferred from the claim text.

Method and device for operating a hybrid vehicle

Life of this patent

Method and device for operating a hybrid vehicle

Life of this patent

Abstract

Claims20