Title:
EVAPORATED FUEL CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/1997/014883
Kind Code:
A1
Abstract:
A flow region in a forward direction and a flow region in a rearward direction are formed in an intake airflow in a throttle bore of a throttle body (3) in an internal combustion engine, and a boundary between both regions extends rearwardly of a throttle valve (5). An evaporated fuel control device for internal combustion engines is provided with an opening (22), which is formed on an inclined end surface of a purge tube (13) connected to the throttle body (3) for introducing the evaporated fuel and acts as a purge port, and the opening (22) is disposed on a boundary between a forward flow and a rearward flow in the intake airflow and is positioned at a location which projects inward from a throttle bore wall surface (21) of the throttle body (3). When the evaporated fuel is jetted into the throttle bore from the opening (22) of the purge tube (13), it spreads into both forward and rearward flows in the intake airflow at the boundary of the intake airflow to flow toward an intake manifold (2) with the result that the evaporated fuel spreads uniformly into respective cylinders through the intake manifold (2) to be controlled so that an increase in differences of an air fuel ratio among the cylinders is suppressed. As the purge tube (13) provided with the purge port is disposed to be closely fitted into a hole formed in the throttle body (3), an evaporated fuel control device for internal combustion engines is obtained, in which it is easy to work the purge port.
Inventors:
YAMADA JUN (JP)
KANEHARA KENJI (JP)
OKANO HIROSHI (JP)
NOROTA KAZUHIKO (JP)
KANEHARA KENJI (JP)
OKANO HIROSHI (JP)
NOROTA KAZUHIKO (JP)
Application Number:
PCT/JP1996/003002
Publication Date:
April 24, 1997
Filing Date:
October 16, 1996
Export Citation:
Assignee:
NIPPON SOKEN (JP)
TOYOTA MOTOR CO LTD (JP)
YAMADA JUN (JP)
KANEHARA KENJI (JP)
OKANO HIROSHI (JP)
NOROTA KAZUHIKO (JP)
TOYOTA MOTOR CO LTD (JP)
YAMADA JUN (JP)
KANEHARA KENJI (JP)
OKANO HIROSHI (JP)
NOROTA KAZUHIKO (JP)
International Classes:
F02D9/10; F02D41/00; F02M25/08; F02M35/10; (IPC1-7): F02M25/08
Foreign References:
| JPH07158518A | 1995-06-20 | |||
| JPH08501853A | 1996-02-27 | |||
| JPH06213084A | 1994-08-02 | |||
| US5355862A | 1994-10-18 |
Other References:
See also references of EP 0791743A4
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