Internal-combustion engines – Charge forming device – Supercharger
Patent
1990-06-19
1992-01-14
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Supercharger
123 76, 123668, F02B 3300
Patent
active
050800817
ABSTRACT:
This four-cycle head insulating engine has combustion chambers which consist of cylinder head lower surface portions and cylinder liner upper portions, and which are formed in a heat insulating manner; exhaust valves provided in exhaust ports formed in the cylinder head; suction ports formed in cylinder liner lower portion so as to be spaced in the circumferential direction thereof and opened in the positions before the lower dead points; guide scrolls communicating with the suction ports and formed on the outer circumferential surface of a cylinder block; and a supercharger joined to suction passages communicating with the guide scrolls. Accordingly, this heat insulating engine renders it unnecessary to provide, especially, check valves in the suction system, and enables the degree of freedom of designing the guide scrolls to be improved, and the guide scrolls to be formed to such a shape that allows the suction air to be swirled in a large curve and sucked easily into the cylinders. Moreover, the influence of the high-temperature of the exhaust gas and combustion chamber upper walls upon the suction air is minimized, and a decrease in the flow rate of the suction air is prevented.
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Cross E. Rollins
Isuzu Motors Limited
Macy M.
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