Patent ID: 6933734
Filing Date: 2005-08-23
Classification: B60L

Abstract:
1. A vehicle controller which performs overheat detection on a resistor of an electric vehicle that consumes power generated at a time of braking as Joule heat of the resistor, the vehicle controller comprising: current detecting means for detecting a current value of a current flowing through the resistor; voltage detecting means for detecting a voltage value of a voltage generated between both ends of the resistor; resistance value calculating means for calculating a resistance value of the resistor based on the current value and the voltage value; and overheat detecting means for comparing the resistance value calculated by the resistance value calculating means and a resistance value at an allowable temperature of the resistor, and judging that overheat generated at the time of braking as Joule heat is detected from the resistor when the resistance value calculated by the resistance value calculating means is larger than the resistance value at an allowable temperature of the resistor.