凸輪軸傳動
凸(tu)輪(lun)(lun)軸(zhou)(zhou)與曲軸(zhou)(zhou)之間(jian)的常見傳動(dong)(dong)(dong)(dong)方式包(bao)括齒輪(lun)(lun)傳動(dong)(dong)(dong)(dong)、鏈條傳動(dong)(dong)(dong)(dong)以及(ji)齒形膠帶傳動(dong)(dong)(dong)(dong)。下置凸(tu)輪(lun)(lun)軸(zhou)(zhou)和中置凸(tu)輪(lun)(lun)軸(zhou)(zhou)與曲軸(zhou)(zhou)之間(jian)的傳動(dong)(dong)(dong)(dong)大多(duo)采(cai)用(yong)(yong)圓柱形正時齒輪(lun)(lun)傳動(dong)(dong)(dong)(dong)，一(yi)般從曲軸(zhou)(zhou)到(dao)凸(tu)輪(lun)(lun)軸(zhou)(zhou)只需(xu)要一(yi)對齒輪(lun)(lun)傳動(dong)(dong)(dong)(dong)，如果傳動(dong)(dong)(dong)(dong)齒輪(lun)(lun)直徑(jing)過大，可以再增加(jia)1個中間(jian)惰輪(lun)(lun)。為了嚙合平穩并(bing)降低工作(zuo)噪聲(sheng)，正時齒輪(lun)(lun)大多(duo)采(cai)用(yong)(yong)斜齒輪(lun)(lun)。
鏈條(tiao)傳(chuan)動(dong)(dong)常見于(yu)頂置(zhi)凸(tu)輪(lun)(lun)軸(zhou)(zhou)與曲(qu)軸(zhou)(zhou)之間，但其工(gong)(gong)作(zuo)可靠性(xing)和耐(nai)久性(xing)不(bu)如齒(chi)(chi)輪(lun)(lun)傳(chuan)動(dong)(dong)。在高轉速發動(dong)(dong)機上(shang)廣泛(fan)使用齒(chi)(chi)形膠(jiao)帶(dai)代替(ti)傳(chuan)動(dong)(dong)鏈條(tiao)，但在一(yi)(yi)些大功率發動(dong)(dong)機上(shang)仍然使用鏈條(tiao)傳(chuan)動(dong)(dong)。齒(chi)(chi)形膠(jiao)帶(dai)具有工(gong)(gong)作(zuo)噪(zao)聲小、工(gong)(gong)作(zuo)可靠以及成本低等(deng)特點。對(dui)于(yu)雙頂置(zhi)凸(tu)輪(lun)(lun)軸(zhou)(zhou)，一(yi)(yi)般是排氣凸(tu)輪(lun)(lun)軸(zhou)(zhou)通(tong)過正時齒(chi)(chi)形膠(jiao)帶(dai)或鏈條(tiao)由(you)(you)曲(qu)軸(zhou)(zhou)驅(qu)動(dong)(dong)，進(jin)氣凸(tu)輪(lun)(lun)軸(zhou)(zhou)通(tong)過金屬鏈條(tiao)由(you)(you)排氣凸(tu)輪(lun)(lun)軸(zhou)(zhou)驅(qu)動(dong)(dong)，或進(jin)氣凸(tu)輪(lun)(lun)軸(zhou)(zhou)和排氣凸(tu)輪(lun)(lun)軸(zhou)(zhou)均(jun)由(you)(you)曲(qu)軸(zhou)(zhou)通(tong)過齒(chi)(chi)形膠(jiao)帶(dai)或鏈條(tiao)驅(qu)動(dong)(dong)。