Throttle valve apparatus for internal combustion engine
AssigneeNippondenso Co., Ltd.
InventorsMasaki Akutagawa, Yukio Mori
Life of this patent
Estimating the term…
Abstract
A keep-back recess for blocking water, which is likely to be transmitted to a throttle valve along an inner peripheral surface of an intake pipe, is formed at an inner surface of a throttle body. The keep-back recess collects and stores water so that the throttle valve is prevented from freezing without leading engine cooling water in the throttle body.
Claims21
A throttle valve apparatus for an internal combustion engine having an intake pipe, said apparatus comprising:
- a throttle body connectable to said intake pipe and having a passage portion therein for an air flow from said intake pipe;
- a throttle valve provided in said passage portion of said throttle body for controlling an amount of intake air;
- and
- a keep-back recess provided in at least lower portion of said passage portion for blocking water transmitted from upstream side of said throttle valve along an inner surface of said intake pipe, said keep-back recess having an opening portion facing to said upstream side of said throttle valve.
An intake air controlling apparatus provided in an intake air passage for controlling intake air for an internal combustion engine, said apparatus comprising:
- a body having a part of said intake air passage therein;
- a shaft provided on said body;
- a valve for controlling an opening area of said air intake passage in said body by rotation, said valve being supported rotatably by said shaft;
- wherein said body includes;
- an inner wall for forming a passage with said valve, an opening area of said passage being changed according to a rotation angle of said valve;
- an outer wall located outside said inner wall, said outer wall being located substantially in parallel to said inner wall;
- and
- a bottom wall for forming between said inner wall and said outer wall a recess portion whose opening faces at least one of an upstream side and a downstream side of said intake air passage, said recess portion being substantially closed at opposite side of said intake air passage so that said bottom wall interconnects said inner wall and said outer wall.
A throttle valve apparatus for an internal combustion engine having an intake pipe, said apparatus comprising:
- a throttle body connectable to said intake pipe and having a passage portion therein for an air flow from said intake pipe;
- a wall portion formed in said passage portion at least at a lower side of said passage, said wall portion forming radially outside thereof a keep-back recess with said throttle body and radially inside thereof an air flow passage, said keep-back recess being open at an upstream side thereof to said intake pipe and closed at a downstream side thereof to lead thereinto and store therein water in said intake pipe;
- and
- a throttle valve disposed in said passage portion at radially inside said wall portion for controlling an amount of intake air.
Dependencies are inferred from the claim text.