Electronic engine controller

Abstract

Abstract PURPOSE:To shorten the time required for making arithmetic processing and prevent response delay by computing one address value from both an engine rpm and a throttle valve opening and searching both a fuel injection quantity and an iginition timing from the specified table. CONSTITUTION:When an engine runs, in a micromputer 4 a timer 5 measures an interval between pulse signals from a revolution sensor 1 by counting the number of clock pulses from an oscillator, thereby computing the rovolutional number. From said revolutional number and the opening value of a throttle valve obtained after the output of a throttle sensor 2 is subjected to A/D conversion, an address operating circuit 6 generates a specified corresponding address value and then reads both a fuel injection quantity value and an ignition timing value written at the preset address in a memory from a table look-up circuit 7 on the basis of the address value. According to those values the microcomputer 4 controls transistors 10 and 17 via a control circuit 8 so as to control operation of a fuel injection valve 9 and an ignition coil 11.

Inventors

• 👤 Yoshiaki Omori
• 👤 大森　良明

Bibliographic Details