Patent ID: 7266441
Filing Date: 2007-09-04
Classification: B60W,F02N,Y02T,Y10T

Abstract:
1. A system for controlling an idling stop of a hybrid electric vehicle having a brake operated by compressed air, comprising: an engine; a motor-generator including both a motor function and a generator function; an inverter connected to a high-voltage battery and configured to convert direct current from the high-voltage battery into alternating current for the motor-generator; a Direct Current-Direct Current (DC—DC) converter provided between the inverter and a low-voltage battery and configured to boost voltage from the low-voltage battery and compensate for a voltage difference between the low-voltage battery and the high-voltage battery; a tilt sensor mounted in the vehicle and configured to detect a tilt angle of the vehicle and output a signal; a pressure sensor for detecting air pressure within an air tank for the brake of the vehicle and outputting a signal; and a Motor Control Unit (MCU) for controlling an idling stop of the engine by controlling operation of the motor-generator in response to states of detected signals from the tilt angle sensor and the pressure sensor.