USE OF ESTIMATED TIME OF ARRIVAL TO A DESTINATION OF A VEHICLE AS A BASIS FOR RECHARGING THE VEHICLE BATTERY TO A DESIRED STATE OF CHARGE
Publication Date: 2005-Sep-16
The IP.com Prior Art Database
In a vehicle, e.g. a hybrid electric truck, comprising a navigation apparatus, information about estimated time of arrival to a final destination or a restricted area as calculated by the navigation apparatus is used to charge the vehicle battery to a desired state of charge at the most suitable point of time before actual arrival since the estimated time of arrival is continuously updated by the navigation apparatus.
A vehicle, e.g. a hybrid electric vehicle (HEV) such as a truck, comprises an electric motor for driving the HEV, a rechargeable battery as a power source, an electric generator for charging the battery, and an internal combustion engine for driving the electric generator. Electric power is supplied from the battery to the electric motor which drives the HEV, while the battery may be charged by electric power generated by the electric generator driven by the internal combustion engine or regenerative electric power from the electric motor during deceleration or braking of the HEV.
In every vehicle and especially important in a HEV, the battery needs to be maintained in a state of charge (SOC) so as to satisfy a request for electric power assist.
A preferable SOC for a battery in a HEV is such that a sufficient amount of power remains in order to meet a demand for electric power in starting or a request for power assist in running.
However, in connection with e.g. office work in the HEV with the vehicle computer and other power consuming devices active after that the HEV has reached its final destination and the internal combustion engine has been turned off, the battery SOC may be so low that office work is not permitted unless the internal combustion engine is started. If the HEV is parked in a garage, it is of course not desirable to hav...