Internal-combustion engines – Frame construction – Horizontal cylinder
Patent
1989-04-05
1990-03-27
Okonsky, David A.
Internal-combustion engines
Frame construction
Horizontal cylinder
123195C, F02F 700, F01M 1100, F16M 1022
Patent
active
049111183
ABSTRACT:
A cylinder block reinforcement construction for an engine includes a reinforcement member fixed to a skirt portion of a cylinder block of the half-skirt type and fastened to each of bearing caps bearing the crankshaft of the engine. The reinforcement member is formed in a platelike configuration and a substantially dishlike sectional shape and includes a bottom face portion, side face portions rising from both side ends of the bottom face portion, and flange portions provided at upper edges of the side face portions so as to be fastened to the skirt portion. The reinforcement member is provided, at positions corresponding to respective of the bearing caps and spaced in the axial direction of the crankshaft, with protuberant portions for attachment to respective of the bearing caps. The bottom face portion may be provided with bottom vent holes, each being provided between adjacent of the protuberant portions at a position corresponding to the respective cylinder. The area of each bottom hole at a location where the piston disposed directly thereabove is accompanied by an adjacent piston reciprocated in phase therewith is greater than the area of bottom holes at other locations.
REFERENCES:
patent: 2019558 (1935-11-01), Brush
patent: 4656983 (1987-04-01), Anno
patent: 4793299 (1988-12-01), Ishimura et al.
Kageyama Takeshi
Matsue Arata
Mazda Motor Corporation
Okonsky David A.
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