Vehicular power generation control device and method
AssigneeDenso Corporation
InventorsMakoto Taniguchi, Koji Tanaka
Life of this patent
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Abstract
A vehicular power generation control device has a voltage control circuit, a power supply circuit and a power control circuit. The voltage control circuit controls the field current of a power generator by turning on and off a transistor. The power control circuit has an ignition switch closure detection circuit and an engine rotation detection circuit. When a closure of the ignition switch is detected by the ignition switch closure detection circuit, an operation of the rotation detection circuit is stopped. When the closure is not detected, the operation of the rotation detection circuit is started.
Claims10
A vehicular power generation control device for controlling output voltages of a vehicular power generator having a rotor that has a plurality of field poles, a field winding that magnetizes the field poles, a stator that has stator windings in which an AC voltage is induced by a rotating magnetic field caused by the rotor, and a rectifier that converts an output of the stator windings from AC to DC, comprising:
- a first switching means connected in series with the field winding;
- a voltage control means for controlling the output voltage by controlling on/off conditions of the first switching means;
- a start detection means detecting a start of an engine by detecting an output voltage waveform of the stator windings thereby to start operations of the voltage control means;
- and
- an ignition switch closure detection means for detecting an ignition switch closure thereby to start operations of the voltage control means,
- wherein the operations of the start detection means are stopped when the ignition switch closure is detected by the ignition switch closure detection means.
A vehicular power generation control method comprising steps of:
- detecting a start of operation of an engine from an ignition switch closure;
- detecting the start of operation of the engine from a rotation of the engine;
- and
- starting a field current control for a power generator of the engine when the start of operation of the engine is detected from the ignition switch closure or the rotation of the engine,
- wherein the step of detecting the start of operation of the engine from the rotation of the engine is disabled when the start of operation of the engine is detected from the ignition switch closure.
Dependencies are inferred from the claim text.