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Method of taking-in input data for motorcar control

  • US 4,562,545 A
  • Filed: 10/28/1982
  • Issued: 12/31/1985
  • Est. Priority Date: 10/30/1981
  • Status: Expired due to Term
First Claim
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1. For use in a motorcar controlling system having a plurality of sensors each for detecting respective analog data to produce a respective analog voltage output signal, a multiplexer connected to said sensors for selecting one of said sensors to produce only the analog voltage output signal of the selected sensor as an output thereof, an A/D converter for converting the output of said multiplexer into digital data and for producing the digital data as an output thereof, memory means for storing therein the output data of said A/D converter, and a plurality of digital controllers each operating on the basis of said digital data stored in said memory means and being capable of generating a request signal when data is desired from a selected sensor, a method of inputting data for controlling said motorcar comprising the steps of:

  • (a) storing in a first area of said memory means request signals recieved from said controllers so as to disignate selected sensors from which data is desired by said controllers;

    (b) searching said first area of said memory means for a request signal;

    (c) controlling said multiplexor to select a sensor on the basis of detection of a request signal in said first area of said memory means and initiating operation of said A/D converter;

    (d) storing the output of said A/D converter in a second memory area of said memory means as data; and

    (e) transferring data stored in said second area of said memory means to the controller which generated the request signal initiating selection of the sensor from which the data was obtained, whereby said controller is operated on the basis of said data.

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