Exhaust gas recirculator for engine

Abstract

Abstract PURPOSE:To correct recirculation by storing the correction level required for air/fuel ratio feedback control for each operating condition under stoppage of exhaust gas recirculation when recirculating exhaust gas then comparing initial comparison level with current level and detecting choking of recirculation path. CONSTITUTION:A control circuit 11 will control opening of an exhaust gas recirculation valve 10 and open valve time of a fuel injection valve 4 on the basis of detected levels from O2 sensor 7, rotation sensor 16, water temperature sensor 17, suction temperature sensor 18, etc. The control circuit 11 will classify the feedback control correction level of open valve time of said valve 4 based on the detected level from O2 sensor 7 for exhaust gas recirculation and stoppage and store to the address of first and second memories 12, 13 corresponding to each operating condition. Stored levels are compared then stored in third memory 14 comprising a non-volatile memory to calculate the choked state of exhaust recirculation path from initial level of comparison and current level thus to correct opening control signal of an exhaust recirculation valve 10.

Inventors

• 👤 Sadashichi Yoshioka
• 👤 吉岡　定七
• 👤 Tatsuro Oda
• 👤 織田　辰郎
• 👤 Yoshitaka Nomoto
• 👤 義隆 野元
• 👤 Katsuhiko Yokooku
• 👤 横奥　克日子

Bibliographic Details