Back to results
US 6,295,955 B1Granted
Cooling arrangement for direct injected engine
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsMasahiko Kato, Takayuki Sato, Hiroaki Fujimoto
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsMasahiko Kato, Takayuki Sato, Hiroaki Fujimoto
Estimating the term…
Cooling arrangements that cool down fuel injectors exposed to the high temperature combustion in direct injected engines so that no heavy oil components deposit on nozzles of the fuel injectors. A bypass of water flow extends in the proximity of the boss where the fuel injector is inserted to expedite cooling of the fuel injector. A cavity extending toward the boss can replace the bypass or can be additionally provided. The fuel injector boss and a spark plug boss are connected with each other and make a wall that can obstruct water flow. Another bypass is provided to clear water away from a backwater formed at the wall. In case that some heavy oil components deposit on the injector nozzles for some reasons, a control system for controlling the fuel injection is allowed to adjust amounts of the fuel basically in response to the temperature of the injector nozzle.
A direct cylinder injected, internal combustion engine comprising a cylinder body defining at least one cylinder bore in which a piston reciprocates, a cylinder head affixed to an end of said cylinder body for closing said cylinder bore and defining with said piston and said cylinder bore a combustion chamber, a fuel injector having a nozzle for spraying fuel directly into said combustion chamber for combustion therein, at least one of said cylinder body and said cylinder head being provided with a cooling jacket therein, said fuel injector being inserted into a boss formed on said cylinder head so that said nozzle of said fuel injector is exposed to said combustion chamber, a cooling water passage being formed in said cylinder head, at least a part of said boss being placed in said cooling water passage, and said cooling jacket and said cooling water passage being connected with each other by a bypass.
Dependencies are inferred from the claim text.