| 摘要 |
The invention discloses a cylinder head of a small-sized general-purpose gasoline engine and a gasoline engine having the same. The cylinder head of the small-sized general-purpose gasoline engine comprises a cylinder head body (1), and an intake passage (9), an exhaust passage (5) and a sparking plug mounting hole (8) arranged on the cylinder head body (1); a combustion chamber surface (7), being a arched smooth curve, is formed at the inner side of the cylinder head body (1); the cylinder head body (1) is provided with an intake valve (11) corresponding to the intake passage (9) and an exhaust valve (4) corresponding to the exhaust passage (5); the intake valve (11) is inclined towards the intake passage (9) from the bottom part to the top part; the exhaust valve (4) is inclined towards the exhaust passage (5) from the bottom part to the top part; and the included angle between the axis of the intake valve (11) and the axis of the exhaust valve (4) is 24±5 degrees. In the invention, the parameters between the combustion chamber and the intake valve as well as the exhaust valve are inter-coordinated and matched, the operation efficiency of the gasoline engine is improved, the fuel is saved, and the discharge is reduced. |
| 主权项 |
1. A cylinder head of a small-sized general-purpose gasoline engine, comprising:
a cylinder head body (1), an intake passage (9), an exhaust passage (5) and a sparking plug mounting hole (8) arranged on the cylinder head body (1), wherein a combustion chamber surface (7), being a arched smooth curve, is formed at the inner side of the cylinder head body (1); the cylinder head body (1) is provided with an intake valve (11) corresponding to the intake passage (9) and an exhaust valve (4) corresponding to the exhaust passage (5); the intake valve (11) is inclined towards the intake passage (9); the exhaust valve (4) is inclined towards the exhaust passage (5); and an included angle between the axis of the intake valve (11) and the axis of the exhaust valve (4) is 24±5 degrees; and wherein the intake valve (11) and the exhaust valve (4) are respectively provided with rocker arms (13, 16); the cylinder head body (1) is provided with two rocker arm bases (12, 17) which respectively correspond to the two rocker arms (13, 16); the two rocker arms (13, 16) are respectively provided with embedding grooves that allow insertion of top parts of the two rocker arm bases (12, 17); and the two rocker arms (13, 16) are hinged to the top parts of the two rocker arm bases (12, 17) respectively through rockshafts (14, 15) that pass through two sidewalls of corresponding embedding grooves and corresponding rocker arm bases (12, 17); wherein a top surface of each embedding groove is provided with a through hole; the top parts of the two rocker arm bases (12, 17) are exposed through the corresponding through holes and are respectively provided with lubrication oil holes (18, 19) that run through the corresponding rockshafts (14, 15). |
