Internal-combustion engines – Intake manifold – Passage to crankcase
Patent
1997-12-19
2000-03-07
McMahon, Marguerite
Internal-combustion engines
Intake manifold
Passage to crankcase
12318442, F02M 3510
Patent
active
060326336
ABSTRACT:
In a outboard marine engine having a vertically oriented crankshaft, an intake manifold assembly which may consist of a one-piece cast member is disposed on one side of the cylinder block, and a throttle body is connected to an upstream end of said manifold assembly. The upstream end of said manifold assembly defines a surge tank, and is provided with a vertically narrowed section, and an elbow section which curves around a corner of the crankcase so that the throttle body is placed opposite an end surface of the crankcase. The elbow section allows the intake system to be accommodated in an outer profile of the engine assembly without any significant protrusion while maximizing the length of the intake system so as to provide the benefits of the inertia of the intake air. The upper and lower surfaces of the narrowed section are attached to a side of the crankcase via L-shaped brackets which are provided with elongated mounting holes which accommodate positional errors that may exist between the manifold assembly and the crankcase.
REFERENCES:
patent: 5513606 (1996-05-01), Shibata
patent: 5553586 (1996-09-01), Koishikawa et al.
patent: 5829402 (1998-11-01), Takahashi et al.
patent: 5855193 (1999-01-01), Takahashi
Honda Giken Kogyo Kabushiki Kaisha
MacPherson Alan H.
McMahon Marguerite
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