Cylinder head structure for multiple cylinder engines

Details Cylinder head structure for multiple cylinder engines Cylinder head structure for multiple cylinder engines

1989-08-01

1991-04-16

Dolinar, Andrew M.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

123432, 123308, F02B 1500

Patent

active

050073923

ABSTRACT:
A cylinder head structure for a multiple cylinder engine, comprising, at least for each of its cylinders (1) located at either longitudinal end of its cylinder bank: a combustion chamber (13) defined by the cylinder and a piston received therein; an intake passage (18) communicated with an intake manifold (20) at its one end and with said combustion chamber at its other end; and exhaust passage (19) communicated with an exhaust manifold (21) at its one end and with said combustion chamber at its other end; at least one of said intake passage and said exhaust passage being curved toward a longitudinally central part of said cylinder bank as it extends from its other end to its one end. Hence, the size and weight of the intake manifold and/or the exhaust manifold can be reduced. In particular, if the passage is communicated with the combustion chamber by a pair of ports (14a, 14b, 15a, 15b, 14a', 14b', 15a', 15b', 58Ea, 58Eb, 58 Ia, 58Ib, 114a', 114b', 115a', 115b') controlled by valves and arranged along a longitudinal direction of the cylinder bank and different flow rates are assigned to these ports depending the operating conditions of the engine, a significant improvement in the performance of the engine may be attained by symmetrically arranging these ports with respect to a longitudinal center of the cylinder bank.

REFERENCES:
patent: 4538547 (1985-09-01), Lombardi
patent: 4669434 (1987-06-01), Okumura et al.
patent: 4671228 (1987-06-01), Tomita et al.
patent: 4726341 (1988-02-01), Muranaka et al.
patent: 4726343 (1988-02-01), Kruger

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