Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VAPORIZED FUEL TREATMENT FOR INTERNAL COMBUSTION ENGINE, AND CONTROL AND TROUBLE DIAGNOSING DEVICE FOR EGR
Document Type and Number:
Japanese Patent JPH07197861
Kind Code:
A
Abstract:

PURPOSE: To commonly use parts and to perform simple and accurate purge of vaporized fuel and diagnosis of a trouble of EGR by aiming at comparative similarity of a purge operation region of vaporized fuel to an EGR operation region.

CONSTITUTION: The opening end on the throttle chamber 2 side of a first signal negative pressure passage 28 through which the pressure chamber of a purge on-off valve 26 and a throttle chamber 2 are interconnected is arranged in a position situated downstream from a throttle valve 4 and a three-way valve 29 is located. The opening end on the throttle chamber 2 side of the second signal negative pressure passage 33 through which the pressure chamber 32a of an EGR device 32 and the throttle chamber 2 are interconnected is arranged in a position where it is communicated with a position situated downstream from the throttle valve 4 when the opening of the throttle valve 4 is further increased. Further, a portion between the three-way valve 29 of the signal negative pressure passage 28 and a purge cut valve 26 and the second signal negative pressure passage 33 are interconnected through a passage 35 in which a one-way valve 34 is located. The occurrence of abnormality of a device is diagnosed according to opening and closing of the three-way valve 29 and the presence of EGR.


Inventors:
GOTO KENICHI
Application Number:
JP35167593A
Publication Date:
August 01, 1995
Filing Date:
December 29, 1993
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NISSAN MOTOR
International Classes:
G01M15/04; F02B77/08; F02M25/07; F02M25/08; G01M15/00; (IPC1-7): F02M25/07; F02B77/08; F02M25/08; G01M15/00
Attorney, Agent or Firm:
Fumio Sasashima