力士樂柱塞泵是由低壓齒輪式輸油泵、3個(gè)帶油泵柱塞的高壓泵油組件和油量控制閥構(gòu)成,。其工作原理:輸油泵將燃油從油箱泵起,,經(jīng)過一個(gè)帶有油水分別的濾清器,經(jīng)過進(jìn)油管然后進(jìn)入高壓泵,。通過輸油泵使燃油經(jīng)泄壓閥的節(jié)省孔,,然后進(jìn)入高壓泵的潤滑和冷卻回路。凸輪軸使3個(gè)泵的柱塞按照凸輪的外形上下運(yùn)動(dòng),。當(dāng)供油油壓泄壓閥的打開壓力,,輸油泵能使燃油經(jīng)高壓泵進(jìn)油閥進(jìn)入柱塞腔,,高壓泵的柱塞正向下運(yùn)動(dòng),當(dāng)柱塞經(jīng)過下止點(diǎn)時(shí),,進(jìn)油閥關(guān)閉,。