초록 ▼

The present invention relates to a control system of an auxiliary power system for a hybrid electric vehicle in which a circuit of the control system of the auxiliary power system is constructed by a digital method. The control system has a function for monitoring a battery charging state and a func

The present invention relates to a control system of an auxiliary power system for a hybrid electric vehicle in which a circuit of the control system of the auxiliary power system is constructed by a digital method. The control system has a function for monitoring a battery charging state and a function for controlling an engine at a constant speed. The auxiliary power system for a hybrid electric vehicle includes an engine, a generator, a battery, and a load. The control system includes a rectifier, a first shunt circuit, a smoothing circuit, a contactor, a main control circuit portion, an engine constant-speed control portion, an auxiliary battery, DC/DC converter, a battery charge voltage monitoring portion, a control state display portion, and a second shunt circuit. The engine constant-speed control portion controls the engine at a constant speed by detecting an engine throttle position signal and an engine rpm signal, and controls the engine rpm and the engine on/off by a signal communication between itself and the main control circuit.

대표청구항 ▼

[ What is claimed is:] [1.] In a control system of an auxiliary power system for a hybrid electric vehicle which includes: an engine; a generator driven by the engine; a battery charged by an output current of the generator; and a load driven by both the generator and the battery, the control system

[ What is claimed is:] [1.] In a control system of an auxiliary power system for a hybrid electric vehicle which includes: an engine; a generator driven by the engine; a battery charged by an output current of the generator; and a load driven by both the generator and the battery, the control system comprising:a rectifier which converts three-phase AC power generated from the generator to DC power;a smoothing circuit for smoothing the DC power;a contactor on switching the DC power applied to both the battery and the load;a fuel quantity sensor which senses fuel quantity, converts the sensed fuel quantity to a fuel quantity control signala battery charging monitoring sensor which checks a charging state of the battery and provides a related control signal anda first shunt circuit which detects an output current of the rectifier, outputs a control signal related to the detected output current, and continuously transmits the DC power from the rectifier to the load via the smoothing circuit:a second shunt circuit which detects the power applied from the contactor to the battery, and outputs a control signal related to the detected battery currenta main control circuit which senses signals from and controls and auxiliary power system; andan engine constant-speed control portion which controls the engine at a constant speed by detecting an engine throttle position signal and an engine rpm signal, and controls engine rpm and an on/off state of the engine by signal communication with the main control circuit.