Exhaust reflux controller

Abstract

Abstract PURPOSE: To improve the performance of the purification of exhaust and the performance of power, by preventing the generation of the errors of the quantity of exhaust flown back by eliminating the functioning errors of a magnet valve due to the variation of line voltage. CONSTITUTION: In a device that controls control negative pressure to an EGR control valve 5 and adjusts the quantity of exhaust flown back by counting the optimum quantity of reflux by means of an arithmetic unit 9 from sucked air quantity signals S 2 , revolution number signals S 3 , etc. and by driving a two-way magnet valve 6 by the drive pulses S 1 of duty corresponding to the optimum quantity of reflux, said arithmetic unit 9 installs a means for correcting the quantity of the correction of duty necessary for conforming electromagnetic flow rate in reference voltage VBO and arbitrary voltage VB according to an expression Y=[α(100-X)/ 100+β].(VBO-VB) (where, a gradient of an approximate straight line is α, value in duty=100% β, duty X and necessary correction quantity Y) besides a computing circuit 10 for putting out signals S 1 corresponding to the optimum quantity of exhaust flown back. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Toshimi Anpo

Bibliographic Details