Fuel mixture heating device of an internal combustion engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorYasuhiko Ishida
Life of this patent
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Abstract
A fuel mixture heating device of an internal combustion engine having a downdraft type carburetor mounted on the collecting portion of the intake manifold. A hollow cylindrical body having a radially outwardly extending flange is arranged at the lower end of the air horn of the carburetor. A plurality of PTC elements is arranged to be in contact with the flange of the hollow cylindrical body for heating the inner wall of the hollow cylindrical body.
Claims17
A fuel mixture heating device of an internal combustion engine having an intake manifold and an intake passage which has an outlet connected to a collecting portion of the intake manifold, the intake passage having a fuel feed apparatus for feeding fuel into the intake passage, said device comprising:
- a power source;
- a hollow cylindrical body arranged at the outlet of the intake passage and aligned with the intake passage, said hollow cylindrical body having a substantially cylindrical inner wall and an outer wall which has a radially outwardly extending flange formed in one piece thereon, and;
- a heater arranged on said flange and connected to said power source, wherein said heater comprises at least one PTC element arranged on said flange, and wherein said flange has a flat wall, and said PTC element has a generally flat shape and a flat face which is in contact with said flat wall.
A fuel mixture heating device of an internal combustion engine having an intake manifold and an intake passage which has an outlet connected to a collecting portion of the intake manifold, the intake passage having a fuel feed apparatus for feeding fuel into the intake passage, said device comprising:
- a power source;
- a hollow cylindrical body arranged at the outlet of the intake passage and aligned with the intake passage, said hollow cylindrical body having a substantially cylindrical inner wall and an outer wall which has a radially outwardly extending flange formed in one piece thereon, and;
- a heater arranged on said flange and connected to said power source, wherein said heater is arranged on said flange via an adhesive layer having an electrical conductivity.
A fuel mixture heating device of an internal combustion engine having an intake manifold and an intake passage which has an outlet connected to a collecting portion of the intake manifold, the intake passage having a fuel feed apparatus for feeding fuel into the intake passage, said device comprising:
- a power source;
- a hollow cylindrical body arranged at the outlet of the intake passage and aligned with the intake passage, said hollow cylindrical body having a substantially cylindrical inner wall and an outer wall which has a radially outwardly extending flange formed in one piece thereon, and;
- a heater arranged on said flange and connected to said power source,
- wherein said device includes a heat insulating plate having a hole and inserted between the intake passage and the collecting portion of the intake manifold, said hollow cylindrical body being inserted into said hole, and wherein said device includes at least one annular electrode plate extending around the outer wall of said hollow cylindrical body and arranged in said heat insulating plate, said heater being arranged between said flange and said annular electrode plate.
A fuel mixture heating device of an internal combustion engine having an intake manifold and an intake passage which has an outlet connected to a collecting portion of the intake manifold, the intake passage having a fuel feed apparatus for feeding fuel into the intake passage, said device comprising:
- a power source;
- a hollow cylindrical body arranged at the outlet of the intake passage and aligned with the intake passage, said hollow cylindrical body having a substantially cylindrical inner wall and an outer wall which has a radially outwardly extending flange formed in one piece thereon, and;
- a heater arranged on said flange and connected to said power source, wherein said device further comprises a first switch which is in the ON position when the temperature of the engine is lower than a predetermined temperature, and a second switch which is in the ON position when the engine is operating under its own power, said heater being connected to said power source via said first switch and said second switch, and wherein said second switch is operated in response to a change in voltage produced at a neutral point of an alternator which is driven by the engine.
A fuel mixture heating device of an internal combustion engine having an intake manifold and an intake passage which has an outlet connected to a collecting portion of the intake manifold, the intake passage having a fuel feed apparatus for feeding fuel into the intake passage, said device comprising:
- a power source;
- a hollow cylindrical body arranged at the outlet of the intake passage and aligned with the intake passage, said hollow cylindrical body having a substantially cylindrical inner wall and an outer wall which has a radially outwardly extending flange formed in one piece thereon, and;
- a heater arranged on said flange and connected to said power source, wherein said heater is associated with means for permitting said heater to heat only said flange of said hollow cylindrical body.
Dependencies are inferred from the claim text.