Title:
EXHAUST GAS RECIRCULATION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2017166363
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation control device having an inexpensive and space-saving configuration capable of preventing a backflow of intake air.SOLUTION: An exhaust gas recirculation control device includes: an exhaust gas recirculation pipe 41 for communicating an intake manifold 10 and an exhaust manifold 20 with each other; an EGR valve 42 for controlling the amount of exhaust gas passing through the exhaust gas recirculation pipe 41; a vacuum pump 43 for producing negative pressure for operating the EGR valve 42; a VSV 44 for controlling an opening of the EGR valve 42 by controlling the negative pressure applied to the EGR valve 42; and an ECU 3 for determining a region where a backflow of intake air from intake side to the exhaust side of the exhaust gas recirculation pipe 41 is generated on the basis of an operating state of an engine 2 when EGR is in the ON state, and in the region where a backflow of intake air is generated, controlling the VSV 44 so that control driving force of the EGR valve 42 is restricted to equal to or lower than energizing force of a spring of the EGR valve 42.SELECTED DRAWING: Figure 1
Inventors:
YUYAMA AKIRA
Application Number:
JP2016050603A
Publication Date:
September 21, 2017
Filing Date:
March 15, 2016
Export Citation:
Assignee:
SUZUKI MOTOR CORP
International Classes:
F02M26/66
Attorney, Agent or Firm:
Nissei International Patent Office
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