Automatic vehicle-mounted device control system

Details Automatic vehicle-mounted device control system Automatic vehicle-mounted device control system

2001-09-10

2003-04-15

Ramirez, Nestor (Department: 2834)

Electricity: single generator systems

Automatic control of generator or driving means

With respect to a reference or master device or quantity

C322S022000, C322S023000, C322S024000, C322S017000

Reexamination Certificate

active

06548990

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATION
This application is based on and incorporates herein by reference Japanese Patent Applications No. 2000-296345 filed Sep. 28, 2000 and No. 2000-357684 filed Nov. 24, 2000.
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle-mounted device control system mounted in a passenger vehicle, a truck or the like, and particularly to a power generator control system which enables use of a single electronic control unit even when a power generator type is changed.
Electric power generated by a power generator (alternator) mounted in a vehicle is used to drive various electric loads and to charge a vehicle-mounted battery. The output current characteristic and the torque characteristic of the power generator are determined in accordance with a vehicle type and vehicle-mounted electric loads. These characteristics differ by types of vehicles. Further, the characteristics differ for the same type of vehicle, when a maker of a power generator differs.
When the output current characteristic and the torque characteristic of a power generator differ, it is necessary to change control constants of an electronic control unit for controlling other vehicle-mounted devices in accordance with operation characteristics of a power generator. As a result, it is necessary to provide various types of electronic control units in vehicles in correspondence with the types of power generators.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a vehicle-mounted device control system capable of reducing the number of necessary types of electronic control units and power generators.
According to the present invention, a vehicle-mounted control system comprises a vehicle-mounted device such as a power generator controllable in response to a control signal applied thereto, an electronic control unit for controlling the vehicle-mounted device by outputting the control signal, and a communicating line for transmitting the control signal from the electronic control unit to the vehicle-mounted device. The electronic control unit automatically changes the control signal in response to a change in a type of the vehicle-mounted device.


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