Nissan Motor Company Limited

Yazaki Corporation

Sadafumi Ikeda

Hiroo Yabe

Akira Serizawa

Asami Kubo

Kouji Manabe

Akira Teranishi

Hironobu Takahashi

A control apparatus for controlling a fuel pump includes: an electronic switch provided in a circuit for connecting a power supply to a motor for driving the fuel pump; a current detector which detects a current which flows through the motor; and a controller which controls the electronic switch in a first PWM mode of a first frequency and a first duty ratio in a normal operation; and change a PWM mode to control the electronic switch in a second PWM mode of a second frequency lower than the first frequency and a second duty ratio lower than the first duty ratio when the current flowing through the motor exceeds a threshold current value in the normal operation.

Fuel pump control apparatus

In control apparatus and method for a power supply equipped in an automotive vehicle, the vehicle includes an engine, a starter to start the engine, a battery to reserve the electrical power supplied to the starter, and a generator driven by means of the engine to generate the electrical power to charge the battery, a terminal voltage of the battery is detected in a form of a battery voltage, a charge current flowing into the battery by means of the generator is detected, and a degree of deterioration of the battery is determined on the basis of at least one of the battery voltage detected after the power supply is turned on and before a start of operation of the generator and the charge current detected after the start of operation of the generator.

Control apparatus and method for vehicle equipped power supply having battery deterioration diagnostic feature

A method and an apparatus for providing protection to a generator are disclosed. A reference is determined out of rated capability of the generator. Based on the reference, and field current and output conditions of the generator, there is determined a drop in generator performance due to a temperature condition of the generator. Accounting for the drop in generator performance, operation of the generator may be modified to a generator output limit mode.

Protection of a generator without measuring temperature

In a charge control apparatus for a vehicle battery comprising a control device that controls charge/discharge of the battery, a deceleration standby state detection device that detects a deceleration standby state of the vehicle and a decelerating state detection device that detects a decelerating state of the vehicle, the control device implements control so as to start a discharge at the battery if the deceleration standby state detection device detects that the vehicle is in a deceleration standby state and implements control so as to start a battery charge by halting battery discharge and storing the power generated by the generator if the decelerating state detection device detects that the vehicle is in a decelerating state following the discharge start.

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Chigasaki, Japan

Sadafumi Ikeda