Intake and exhaust valves and intake port of internal combustion

Internal-combustion engines – Means to whirl fluid before – upon – or after entry into...

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Details

123 9067, 12318814, 12318813, F02B 3100

Patent

active

055969640

ABSTRACT:
Each of intake and exhaust valves of an internal combustion engine has a valve retainer provided with a center hole through which the upper portion of each valve stem passes, a flange and a raised portion surrounded by the flange and around the center hole, a groove formed around the center hole, on the raised portion for receiving a pin inserted into a hole formed in the upper portion of the valve stem. The valve retainer can be easily assembled with a valve spring. Further, a cylinder head has an intake port comprising a lateral path which is in shape of a deep pan in cross section and whose height is gradually decreased from the inlet of the lateral path to a vertical path whose lower end has an opening portion to be opened and closed by a valve portion of the intake valve. Thereby, the mixing state of fuel and air is improved.

REFERENCES:
patent: 2574120 (1951-11-01), Rich
patent: 4574751 (1986-03-01), Sugiyama et al.
patent: 4829952 (1989-05-01), Barker
patent: 5245964 (1993-09-01), Matsuo et al.
patent: 5265568 (1993-11-01), Nakagawa

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