| 摘要 |
PURPOSE: A valve for engines is provided to optimize lubricating performance by forming circular grooves in a grid array with uneven lines in a radial array. CONSTITUTION: A valve for engines comprises a contact surface(10). The contact surface makes rotational and frictional motions around a rotary shaft, and makes a straightly frictional motion with a valve driving member. A plurality of uneven lines(11) is radially formed on the contact surface around the rotary shaft. An angle of between adjacent uneven lines among a plurality of the uneven lines is 0~30 degrees. The uneven lines comprise a plurality of radially formed rectangle grooves. |
