Intake heating device of an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKeigo Kato, Masahisa Ando, Yosio Kuroiwa
Life of this patent
Estimating the term…
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. The inner pipe and the outer pipe are interconnected to each other in such a way that the upper end and the lower end of the inner pipe are bent outwards and pressed onto the outer wall of the outer pipe.
Claims10
An intake heating device of an internal combustion engine, which has a hollow heater vessel placed in an intake passage between the 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, said outer pipe having an inlet end portion and an outlet end portion, said inner pipe having an inlet end portion and an outlet end portion which are bent outwards and are pressed onto outer walls of the inlet end portion and the outlet end portion of said outer pipe for fixing the inlet end portion and the outlet end portion of said inner pipe to the inlet end portion and the outlet end portion of said outer pipe, respectively;
- 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 power supply means for applying voltage between the inner walls and the outer walls of said PTC elements.
Dependencies are inferred from the claim text.