Denso Corporation

Tomomi Tsuzuki

Tsukasa Kikuchi

Tadatoshi Asada

Takatoshi Inokuchi

Toshikazu Kizawa

Liang Song

The vehicle-use power generation control apparatus includes a first section to control an excitation current of a vehicle generator driven by a vehicle engine such that a power generation voltage of the vehicle generator is kept at a first set value, a second section to perform gradual excitation control in order to gradually increase the excitation current, a third section configured to inhibit the gradual excitation control when the power generation voltage falls below a second set value lower than the first set value while the gradual excitation control is performed, a fourth section to detect a rotational speed of the vehicle engine or the vehicle generator, a fifth section to determine a limit value of the excitation current based on the detected rotational speed, and a sixth section configured to limit the excitation current below the limit value when the power generation voltage falls below the second set value.

Vehicle-use power generation control apparatus and vehicle-use power generation control system

In a voltage controller for a vehicle, voltage controlling means controls an output voltage of a power generator mounted on the vehicle and a terminal voltage of a battery connected to the power generator, by controlling of a field current passing through a field winding of the power generator. This control is performed by operating switching means connected to the field winding so that the switching means is conducted intermittently. Signal generating means generates a power generator state signal by measuring a state of the power generator at predetermined measurement periods. Signal averaging means performs an exponentially weighted averaging of the power generator state signal. The signal averaging means executes the averaging within a predetermined averaging period and updates the averaging at every predetermined measurement period.

Voltage controller for vehicle using averaged status signal

The vehicle-use power generation control device includes a first function of detecting a temperature around a generator mounted on a vehicle, a second function of setting a target control voltage in accordance with the temperature detected by the first function, and a third function of controlling an output voltage of the generator at the target control voltage set by the second function. The second function is configured to determine the target control voltage on the basis of a target power generation voltage defining the target control voltage to be set at a predetermined temperature, and a predetermined gradient of the target control voltage with respect to the temperature detected by the first function.

Vehicle-use power generation control device

There is provided a generator control apparatus that includes a generating condition detector, an alarm issuing unit, and an alarm controller. The generating condition detector detects an operating condition of the generator for use in a vehicle. The alarm issuing unit is configured to issue alarm to a driver of the vehicle about an abnormal operating condition of the generator when the generating condition detector detects the evidence that the generator is running under an abnormal condition, and to stop to issue alarm to the driver when the generating condition detector detects the evidence that the generator is running in a normal condition.

Generator control apparatus having alarm issuing unit

According to the present invention, there is provided a control apparatus for an automotive alternator which includes a switch, a target voltage setter, a voltage regulator, and a disconnection detector. The switch is configured to be selectively turned on and off so as to intermittently excite the alternator. The target voltage setter works to set a target voltage. The voltage regulator works to regulate an output voltage of the alternator to the target voltage through controlling on/off operation the switch. The disconnection detector works to detect disconnection between the alternator and an on-board battery to be charged by the alternator. The disconnection detector is configured to detect the disconnection, when the target voltage is changed from a lower value to a higher value, based on a time required for the voltage regulator to bring the output voltage of the alternator from the lower value to the higher value.

Control apparatus for automotive alternator having capability of reliably detecting disconnection between alternator and battery

In a vehicle voltage control apparatus which regulates the output voltage of the vehicle electric generator and which receives an external control signal for lowering the regulated voltage value, from an external apparatus such as the engine ECU during engine starting, a circuit detects the occurrence of engine starting based upon the frequency of an AC voltage produced by the generator or upon the level of output voltage produced by the generator. The regulated voltage value is set to a substantially low level, predetermined for use during engine starting, only while the control signal is being received concurrent with engine starting also being detected.

Voltage control apparatus for electric generator of vehicle

The vehicle-generator output voltage control apparatus includes a voltage control circuit regulating an output voltage of a vehicle generator by controlling a field current flowing into a field winding of the vehicle generator by controlling a conduction state of a switching transistor series-connected to the field winding, a power-generation-state signal output circuit outputting a power-generation-state signal through a transmitting/receiving terminal by changing a voltage at the transmitting/receiving terminal in accordance with conduction state of the switching transistor, and a power generation stop circuit stopping power generating operation of the vehicle generator by causing the voltage control circuit to turn off the switching transistor upon detecting a change of the voltage at the transmitting/receiving terminal caused by a power generation stop signal transmitted from an external control device and received at the transmitting/receiving terminal.

Growing community of inventors

Toyota, Japan

Tomomi Tsuzuki