Title:
ENGINE SYSTEM
Document Type and Number:
Japanese Patent JP2018159357
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suitably prevent misfire of an engine caused by effects of residual EGR gas by using both of an electronic throttle device and a fresh air introduction valve during deceleration of the engine.SOLUTION: An engine system includes an engine 1 with a supercharger 5, an electronic throttle device 6, a low-pressure loop type EGR device 21 including an EGR valve 23, a fresh air introduction device and an electronic control device (ECU) 50. The fresh air introduction device includes a fresh air introduction passage 31 and a fresh air introduction valve 32 for introducing fresh air to an intake passage 2 downstream of the electronic throttle device 6. The electronic throttle device 6 is constituted by a DC motor method, and the fresh air introduction valve 32 is constituted by a stepping motor method. When determining deceleration of the engine 1, the ECU 50 performs fully-closing control of the EGR valve 23 and valve opening control of the fresh air introduction valve 32 to a predetermined opening, and performs valve closing control of the electronic throttle device 6 to a predetermined opening, so as to adjust total intake air amount to be introduced to the engine 1.SELECTED DRAWING: Figure 1
Inventors:
YOSHIOKA MAMORU
KAWAI SHINJI
NAKAMURA TAKEHIDE
ITO MASANORI
KAWAI SHINJI
NAKAMURA TAKEHIDE
ITO MASANORI
Application Number:
JP2017058029A
Publication Date:
October 11, 2018
Filing Date:
March 23, 2017
Export Citation:
Assignee:
AISAN IND
International Classes:
F02D45/00; F02D9/02; F02D11/10; F02D41/02; F02D41/12; F02D43/00; F02M26/06; F02M26/54
Attorney, Agent or Firm:
Patent Business Corporation Cosmos Patent Office