Method for operating a hybrid drive
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorsDaniel Baum, Thomas Rauner
Life of this patent
Estimating the term…
Abstract
To improve the purification action of a catalytic converter that is being heated but has not yet reached a desired operating temperature, the internal combustion engine is driven by an electric machine to convey a flow of heating medium through a catalytic converter for heating purposes before the internal combustion engine is started.
Claims14
A method for operating a hybrid drive having an internal combustion engine and having an electric machine that can be coupled in terms of drive to the internal combustion engine, and having a heatable catalytic converter through which exhaust gas of the internal combustion engine flows, the method comprising:
- operating the electric machine to drive the internal combustion engine in a catalytic converter cold phase in which the catalytic converter has not yet reached a desired operating temperature and is being heated, conveying a flow of heating medium through the catalytic converter for heating purposes before the internal combustion engine is started.
A method for operating a hybrid drive of a hybrid vehicle having an internal combustion engine and having an electric machine that can be coupled in terms of drive to the internal combustion engine, and having a heatable catalytic converter through which exhaust gas of the internal combustion engine flows, the method comprising:
- turning on an ignition switch for the vehicle;
- measuring the temperature of the catalytic converter;
- starting a heater for heating the catalytic converter if the temperature indicates that catalytic converter is in cold phase in which the catalytic converter has not yet reached a desired operating temperature;
- operating the electric machine to drive the internal combustion engine during the catalytic converter cold phase without injecting fuel to the engine for conveying a flow of air passed the heater and through the catalytic converter for heating the catalytic converter before starting the internal combustion engine.
Dependencies are inferred from the claim text.