Internal-combustion engines – Intake manifold
Reexamination Certificate
2002-01-31
2004-02-24
Argenbright, Tony M. (Department: 3747)
Internal-combustion engines
Intake manifold
Reexamination Certificate
active
06694940
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application relates to and incorporated herein by reference Japanese Patent Application No. 2001-32861 filed on Feb. 8, 2001.
FIELD OF THE INVENTION
The present invention relates to an air intake device mainly used for an air intake system of an internal combustion engine for a vehicle.
BACKGROUND OF THE INVENTION
As shown in
FIG. 3
, an air intake device proposed in JP-A-10-103089 has a metallic throttle body
103
and a resinous air intake duct
104
. The throttle body
103
rotatably supports a throttle valve
101
through a valve shaft
102
. The air intake duct
104
defines a hollow cylindrical air intake passage
105
. The air intake duct
104
has an opening
104
a
that opens in a peripheral direction thereof, and the throttle body
103
is assembled onto the opening
104
a
. O-rings
110
are provided between contact surfaces of the throttle body
103
and the air intake duct
104
.
In this kind of air intake device, in addition to the air intake duct, separate sealing members are required at an upstream side and a downstream side of the throttle to prevent an air leakage and communication with the outside air. Further, the throttle body is fixed with bolts. Therefore, the air intake device is upsized, and the number of components is increased. As a result, it is difficult to reduce a manufacturing cost. Furthermore, it is difficult to improve fuel efficiency due to weight increase and upsizing.
SUMMARY OF THE INVENTION
The present invention is made in view of the above problems, and it is an object to provide an air intake device suitable for reducing a manufacturing cost by downsizing and reductions of the numbers of assembly process and components, and reducing a weight by reducing an axial length of a throttle body, so that fuel efficiency of an engine is improved.
According to the present invention, a throttle body is directly connected to an air cleaner case and an intake manifold. Therefore, an air intake duct is not required, and it is unnecessary to fix the throttle body with bolts. Accordingly, the air intake device is downsized and the number of components is reduced.
REFERENCES:
patent: 5181491 (1993-01-01), Izumi et al.
patent: 5967116 (1999-10-01), Kawashima et al.
patent: 6334421 (2002-01-01), Singer et al.
patent: A-10-103089 (1998-04-01), None
Ali Hyder
Argenbright Tony M.
Denso Corporation
Nixon & Vanderhye P.C.
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