US 5,481,456 A · Electronic control system having master/slave CPUs for a motor vehicle

Abstract

An electronic control system for a motor vehicle, having multiple sensors (M1) for detecting the operating condition parameters of the motor vehicle; a master controller (M4) from and to which communication lines are laid; and a plurality of slave controllers (M2) which convert the operating condition parameters detected by the sensors (M1) and various data items processed in the control system, into serial data items and transmit them to the master controller (M4) through the communication lines, and which control a plurality of components (M3) installed on the motor vehicle, on the basis of data items received from the master controller (M4); the master controller (M4) being connected with the plurality of slave controllers (M2) through the communication lines, to calculate controlling data items on the basis of various data items received as inputs from the respective slave controllers (M2), and converting the controlling data items into the serial data items and transmitting them to the respective slave controllers (M2) through the communication lines.

Claims13

Dependent claims

An electronic control system for a motor vehicle having, a plurality of parameter detecting means for sensing operating conditions of said motor vehicle and for generating an operating condition signal, and a plurality of actuating means for controlling said motor vehicle, the system comprising:

a plurality of slave control means responsive to said operating signals for controlling said actuating means and for producing a control signal;
master control means connected to each slave control means through a common serial bus for providing a respective control signal requesting said control signal to each of said slave control means for controlling of said actuating means;
said slave control means converts a requested control signal into a serial data signal and transmits said serial data to said master control means during a reception of said respective control signal;
said master control means integrally calculates an operating condition of the vehicle from said serial data signal and produces said respective control signal based on said operating condition of the vehicle so as to minimize transmission volume of said signals between said master and slave control means and to effectively control said motor vehicle;
and
said slave control means comprising an ABS controller, an automatic transmission controller and an engine controller.

3 more elements

An electronic control system for a motor vehicle having, a plurality of parameter detecting means for sensing operating conditions of said motor vehicle and for generating an operating signal, and a plurality of actuating means for controlling said motor vehicle, the system comprising:

a plurality of slave control means responsive to said operating signal for controlling said actuating means and for producing a control signal;
master control means responsive to said control signal and connected to each slave control means for providing respective control signal to be used in calculation by said slave control means to control said actuating means;
and
a communication circuit provided in each said slave control means and said master control means and connected to each other for converting said control signal into a serial form in order to transmit said respective control signals between said slave control means and said master control means in said serial form so as to reduce an occupancy of a property of the system by a data transmission task.

1 more element

A electronic control system for a motor vehicle which provides a plurality of equipment controlled by each electric controller having a microprocessor, a memory, an I/O interface and a bus-line connecting said microprocessor, said memory and said I/O interface with each other, the system comprising:

a master controller providing a microprocessor, a memory, and a bus-line connecting said microprocessor and said memory with each other for processing a control data in order to control said each electronic controller;
a sensor connected to at least one of said each electronic controller for sensing conditions being regarded to control said each equipment and for transmitting a parameter signal corresponding said condition to said each controller to be processed in said each electronic controller;
a communication line providing a serial data bus for transmitting a data in serial form;
and
a communication circuit provided to each of said master controller and said each electronic controller, and connected to each other through said serial data bus, which communication circuit provide a transmitting register connected to each microprocessor through said bus-line for storing a transmitting data, a parallel/serial converter directly accessing to said transmitting register for converting said transmitting data into serial form to transmit toward another of said electronic controllers through said serial data bus, a serial/parallel converter for converting a received data from said other controller through said serial data bus into parallel form, a receiving register connected to said serial/parallel convertor for storing said received data and further connected to each microprocessor through said bus-line, and a interrupt signal generator responsive to an end of data transmission for generating interrupt signal to microprocessor to read out said received data from said receiving register.

2 more elements

Dependencies are inferred from the claim text.

Electronic control system having master/slave CPUs for a motor vehicle

Life of this patent

Electronic control system having master/slave CPUs for a motor vehicle

Life of this patent

Abstract

Claims13