Patent ID: 6250281
Filing Date: 2001-06-26
Classification: F02B,F02F,Y02T

Abstract:
A direct intake port (2) for an engine provided in a cylinder head (1) of the engine and formed by communicating a port inlet (3) with a port outlet (7) through a port upstream portion (4), a port bent portion (5) and a port downstream portion (6), the port outlet (7) being opened at a position eccentric from a cylinder axis (10) of an upper end surface (9) of a cylinder chamber (8), whereinan entire peripheral surface of the bent portion (5) has a first peripheral side surface portion (11) close to the cylinder axis (10), which provides a means (S) for deviating an intake air current (A) far away from the cylinder axis (10), the means (S) being formed so as to turn a direction of the intake air current (A) which flows from the upstream portion (4) to the downstream portion (6), from the first peripheral side surface portion (11) toward an opposite second peripheral side surface portion (13) situated far away from the cylinder axis (10), andthe entire peripheral surface of the bent portion (5) has a third peripheral side surface portion (14) close to the upper end surface (9) of the cylinder chamber (8), which provides a means (T) for deviating the intake air current (A) far away from the upper end surface (9) of the cylinder chamber (8), the means (T) being formed so as to turn the direction of the intake air current (A) which flows from the upstream portion (4) to the downstream portion (6), from the third peripheral side surface portion (14) toward an opposite fourth peripheral side surface portion (16) situated far away from the upper end surface (9) of the cylinder chamber (8).