4-cycle engine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsMasaki Tsunoda, Shigeaki Kuwabara, Sadafumi Shidara
Life of this patent
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Abstract
A V-type multi-cylinder 4-cycle engine E accommodated in an engine room in an outboard motor includes a pair of left and right banks. A surge tank is disposed in a space defined between both the banks and connected to two left and right combustion chambers through intake ports. A throttle body is connected to a lower portion of the surge tank and also to an intake silencer mounted in a left space of the engine room through an elbow. A subsidiary tank for supplying a fuel to an injector is disposed symmetrically with the intake silencer in a right space of the engine room. The employment of the above-described layout makes it possible to make an intake device move compact in the 4-cycle engine.
Claims12
A 4-cycle engine comprising a cylinder block having a substantially horizontal cylinder, a cylinder head coupled to said cylinder block, and a combustion chamber formed in said cylinder head, wherein said engine further includes an intake passage formed in said cylinder head to extend from said combustion chamber and opened into an outer wall of said cylinder head, an intake gas introducing means disposed laterally of said cylinder head to communicate with said intake passage, and a throttle body disposed below said intake gas introducing means and said cylinder to communicate with said intake gas introducing means.
A 4-cycle V-type engine comprising a pair of banks each having a cylinder head, a plurality of cylinders arranged in the pair of banks and disposed substantially horizontally, and a crankshaft disposed substantially vertically, one of said pair of banks being arranged at a higher location than the other of the banks, wherein the engine further comprises an intake system which includes intake ports disposed in said cylinder heads, a portion leading to said intake ports and arranged inwardly of said pair of banks, and another portion disposed below the higher one of said pair of banks.
Dependencies are inferred from the claim text.