Intake heating device of an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYosio Kuroiwa, Keigo Kato, Masahisa Ando
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Abstract
An intake heating device of an engine, comprising a hollow heater vessel placed in the intake passage. The heater vessel comprises an inner pipe, an outer pipe, and a plurality of PTC elements inserted between the inner pipe and the outer pipe. The outer wall of the inner pipe is surrounded by a belt-like insulating member having a plurality of rectangular holes. The PTC elements are inserted into the rectangular holes and held in a predetermined position by the insulating member.
Claims11
A hollow heater vessel of an internal combustion engine, which is placed in an intake passage between fuel supply means and a cylinder of the engine, said hollow heater vessel comprising:
- an inner pipe having therein a mixture passage which is aligned with the intake passage;
- an outer pipe radially spaced from and surrounding said inner pipe;
- a plurality of PTC elements each being inserted between said inner pipe and said outer pipe and having an outer wall and having an inner wall which is in contact with the outer wall of said inner pipe, and;
- insulating means inserted between said inner pipe and said outer pipe and having at least one hole which receives therein one of said PTC elements and has a contour shape substantially equal to that of said PTC elements.
Dependencies are inferred from the claim text.