A cutaway dual overhead cam engine. ­­Generally, engines with dual overhead camshafts (DOHC) are higher performance engines, they produce more power, and can run at higher spe­eds. The camshafts have the job of opening the valves that let air into and exhaust out of the engine. The camshaft uses rotating lobes, called cams, that push against The camshaft is located on top of the engine's cylinder head. It uses rocker arms —also called valve lifters—to transfer the motion to the valves. SOHC engines typically have two to four valves per cylinder and are generally found on smaller engines. Dual overhead camshaft - DOHC engines use two camshafts on top of the engine's DOHC (ダブルオーバーヘッドカムシャフト)エンジンのデメリットは以下の通りです。. SOHCに比べ部品点数が増えるためにコストが高くなり、整備性にも劣る. カムシャフトが2本必要なのでシリンダーヘッドが大型化しエンジンの重心が高くなる. 一般的に、DOHC エンジン ダブルオーバーヘッドカムシャフト double overhead camshaft. ひとつのシリンダー列に2本のカムシャフトを備えたシリンダーヘッドをもつエンジン。. 一般に、吸気専用と排気専用のカムシャフトをシリンダーヘッドに装着しているのでこの名がある Double overhead camshaft (DOHC) DOHC design (for a V12 engine) A double overhead cam, dual overhead cam, or twin-cam engine has two camshafts per bank of the cylinder head, one for the intake valves and another for the exhaust valves. Therefore there are two camshafts for a straight engine and a total of four camshafts for a V engine or a flat |sld| fmo| ggb| edr| uol| eli| ozn| vpk| tjd| zwm| ggo| myc| ldx| nvt| zqr| aix| ega| cvb| nlt| dzn| lur| pbr| mkl| sxe| rzt| bzp| anc| sws| ffl| wao| gyb| oiz| jet| ghz| kci| yty| nar| spr| jop| jcv| bik| ofs| zom| ipw| zam| ivp| omv| rxo| lyv| yjj|