本(ben)發(fa)明涉及(ji)(ji)柴油發(fa)動(dong)機燃油噴射技術領域(yu),特別涉及(ji)(ji)一(yi)種十(shi)千瓦(wa)以下(xia)的小(xiao)型(xing)風冷(leng)單缸柴油發(fa)動(dong)機燃油噴射單缸電控泵。

背景技術：

根(gen)據《中華(hua)人民共(gong)和(he)國(guo)大(da)(da)氣(qi)污(wu)染防(fang)治法》和(he)《大(da)(da)氣(qi)污(wu)染防(fang)治行動計劃》要求(qiu)，自2015年10月1日(ri)起，所有(you)制造和(he)銷(xiao)售的非道路移動機(ji)械用柴油機(ji)，其排氣(qi)污(wu)染物(wu)排放必須符合(he)本標準第三階段(duan)要求(qiu)。

自2016年4月(yue)1日起，所有(you)制造、進口和(he)銷售(shou)的非道路移動(dong)機械(xie)不得裝(zhuang)用不符合《非道路標準》第三階段要(yao)求的柴油機(農用機械(xie)除外)。

自(zi)2016年12月1日起(qi)，所有(you)制造、進口和銷售(shou)的農(nong)用(yong)機械(xie)不得(de)裝用(yong)不符合(he)《非(fei)道路標(biao)準(zhun)》第三階段要求的柴油機。

非(fei)道(dao)路(lu)移動機(ji)械生產企業作為環保生產一致性管(guan)理的責(ze)任(ren)主體，應(ying)(ying)確保實際生產、銷售(shou)的機(ji)械達到《非(fei)道(dao)路(lu)標(biao)準》相(xiang)(xiang)應(ying)(ying)要求。同時，按(an)照《中華人民共和(he)國大(da)氣污染防治法》將相(xiang)(xiang)關環保信息進行公(gong)開。環境(jing)保護部將加強生產、銷售(shou)環節監督檢查(cha)，嚴厲打擊違法生產銷售(shou)不(bu)達標(biao)產品行為。對生產、進口、銷售(shou)不(bu)符合《非(fei)道(dao)路(lu)標(biao)準》要求的，環境(jing)保護部會同有關部門依法進行處罰。

目前,現有(you)(you)技術(shu)的(de)十千(qian)瓦(wa)以(yi)下(xia)(xia)風(feng)冷單缸柴油(you)(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)(ji)燃(ran)油(you)(you)(you)(you)(you)噴(pen)射泵(beng)有(you)(you)機(ji)(ji)械泵(beng)與共軌(gui)(gui)(gui)泵(beng)兩(liang)種。機(ji)(ji)械泵(beng)均為(wei)機(ji)(ji)械控(kong)(kong)(kong)制(zhi)，通(tong)過撥叉、柱塞槽等機(ji)(ji)械裝置來控(kong)(kong)(kong)制(zhi)噴(pen)油(you)(you)(you)(you)(you)量和(he)噴(pen)油(you)(you)(you)(you)(you)時刻，控(kong)(kong)(kong)制(zhi)精度、控(kong)(kong)(kong)制(zhi)靈活性低(di)，控(kong)(kong)(kong)制(zhi)范圍(wei)窄，只能(neng)控(kong)(kong)(kong)制(zhi)少數幾個工(gong)況點，無法在所有(you)(you)工(gong)況進行(xing)精確控(kong)(kong)(kong)制(zhi)；噴(pen)射壓(ya)力低(di)，噴(pen)油(you)(you)(you)(you)(you)泵(beng)泵(beng)端壓(ya)力通(tong)常低(di)于400bar，且受到結構(gou)和(he)原(yuan)理限制(zhi)，如柱塞上(shang)有(you)(you)各種直槽、斜槽增(zeng)加了泄漏，降低(di)了強度和(he)剛度，泵(beng)端壓(ya)力難以(yi)提高(gao)(gao)到400bar以(yi)上(shang)；由(you)于存在這些不(bu)足，機(ji)(ji)械控(kong)(kong)(kong)制(zhi)的(de)高(gao)(gao)壓(ya)噴(pen)油(you)(you)(you)(you)(you)泵(beng)很(hen)難達(da)到國三(t3)及以(yi)上(shang)排放標(biao)準。而共軌(gui)(gui)(gui)泵(beng)銷售價(jia)格高(gao)(gao)(整套共軌(gui)(gui)(gui)泵(beng)配置價(jia)格甚(shen)至高(gao)(gao)出風(feng)冷單缸柴油(you)(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)(ji)價(jia)格)，維修成(cheng)本較(jiao)高(gao)(gao)，油(you)(you)(you)(you)(you)品適(shi)(shi)應性差，十千(qian)瓦(wa)以(yi)下(xia)(xia)風(feng)冷單缸柴油(you)(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)(ji)在實(shi)際使(shi)用(yong)(yong)中上(shang)難以(yi)接受共軌(gui)(gui)(gui)泵(beng)。現有(you)(you)的(de)電控(kong)(kong)(kong)單體泵(beng)因進回油(you)(you)(you)(you)(you)結構(gou)不(bu)合適(shi)(shi)、外形尺寸較(jiao)大、安(an)裝不(bu)便、電磁鐵電感量不(bu)符等因素不(bu)能(neng)在十千(qian)瓦(wa)以(yi)下(xia)(xia)風(feng)冷單缸柴油(you)(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)(ji)燃(ran)油(you)(you)(you)(you)(you)噴(pen)射系統上(shang)直接應用(yong)(yong)。

技術實現要素：

為了(le)滿足國(guo)三(t3)以上(shang)排放標準(zhun)、縮小安裝(zhuang)孔孔距、方便柴(chai)油(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)安裝(zhuang)、減輕電(dian)控(kong)單(dan)體泵(beng)(beng)重量、降低(di)使用成本(ben)，本(ben)發(fa)(fa)明提供了(le)一(yi)種采用小圓(yuan)(yuan)形電(dian)磁鐵(tie)、小圓(yuan)(yuan)形銜鐵(tie)的(de)電(dian)控(kong)單(dan)體泵(beng)(beng)，由(you)電(dian)子控(kong)制(zhi)單(dan)元(ecu)控(kong)制(zhi)的(de)十千瓦以下(xia)(xia)的(de)小型風(feng)(feng)冷單(dan)缸柴(chai)油(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)燃油(you)(you)(you)(you)噴射單(dan)缸電(dian)控(kong)泵(beng)(beng)，該小型風(feng)(feng)冷單(dan)缸柴(chai)油(you)(you)(you)(you)發(fa)(fa)動(dong)機(ji)燃油(you)(you)(you)(you)噴射單(dan)缸電(dian)控(kong)泵(beng)(beng)的(de)泵(beng)(beng)端壓力可達到800bar以上(shang)，控(kong)制(zhi)精度高，控(kong)制(zhi)靈活，各(ge)種工況下(xia)(xia)均(jun)可實現最(zui)優的(de)噴油(you)(you)(you)(you)量和噴油(you)(you)(you)(you)定(ding)時。

本發(fa)明解決其技術(shu)問(wen)題所采用的技術(shu)方案是：

一種(zhong)風(feng)(feng)冷(leng)單(dan)(dan)缸(gang)(gang)柴油(you)(you)(you)(you)(you)(you)發動(dong)(dong)機(ji)(ji)燃油(you)(you)(you)(you)(you)(you)噴射單(dan)(dan)缸(gang)(gang)電(dian)(dian)控(kong)泵(beng),包(bao)括電(dian)(dian)控(kong)泵(beng)部(bu)(bu)件(jian)(jian)、挺(ting)住體(ti)(ti)部(bu)(bu)件(jian)(jian)、進油(you)(you)(you)(you)(you)(you)裝(zhuang)置(zhi)(zhi)(zhi)、回(hui)(hui)(hui)油(you)(you)(you)(you)(you)(you)裝(zhuang)置(zhi)(zhi)(zhi),所(suo)(suo)述(shu)(shu)挺(ting)住體(ti)(ti)部(bu)(bu)件(jian)(jian)與(yu)所(suo)(suo)述(shu)(shu)電(dian)(dian)控(kong)泵(beng)部(bu)(bu)件(jian)(jian)中(zhong)的柱塞的下端連接(jie)(jie)(jie)，其特征在于,所(suo)(suo)述(shu)(shu)電(dian)(dian)控(kong)泵(beng)部(bu)(bu)件(jian)(jian)直接(jie)(jie)(jie)插入風(feng)(feng)冷(leng)單(dan)(dan)缸(gang)(gang)柴油(you)(you)(you)(you)(you)(you)發動(dong)(dong)機(ji)(ji)的缸(gang)(gang)體(ti)(ti)內并(bing)與(yu)風(feng)(feng)冷(leng)單(dan)(dan)缸(gang)(gang)柴油(you)(you)(you)(you)(you)(you)發動(dong)(dong)機(ji)(ji)的缸(gang)(gang)體(ti)(ti)連接(jie)(jie)(jie)；在所(suo)(suo)述(shu)(shu)電(dian)(dian)控(kong)泵(beng)部(bu)(bu)件(jian)(jian)上(shang)安(an)裝(zhuang)有一導(dao)(dao)(dao)向(xiang)(xiang)套(tao)(tao)并(bing)與(yu)所(suo)(suo)述(shu)(shu)導(dao)(dao)(dao)向(xiang)(xiang)套(tao)(tao)連為(wei)一體(ti)(ti),所(suo)(suo)述(shu)(shu)導(dao)(dao)(dao)向(xiang)(xiang)套(tao)(tao)也與(yu)風(feng)(feng)冷(leng)單(dan)(dan)缸(gang)(gang)柴油(you)(you)(you)(you)(you)(you)發動(dong)(dong)機(ji)(ji)的缸(gang)(gang)體(ti)(ti)連接(jie)(jie)(jie)；所(suo)(suo)述(shu)(shu)進油(you)(you)(you)(you)(you)(you)裝(zhuang)置(zhi)(zhi)(zhi)、回(hui)(hui)(hui)油(you)(you)(you)(you)(you)(you)穩壓裝(zhuang)置(zhi)(zhi)(zhi)安(an)裝(zhuang)在所(suo)(suo)述(shu)(shu)導(dao)(dao)(dao)向(xiang)(xiang)套(tao)(tao)上(shang)；所(suo)(suo)述(shu)(shu)風(feng)(feng)冷(leng)單(dan)(dan)缸(gang)(gang)柴油(you)(you)(you)(you)(you)(you)發動(dong)(dong)機(ji)(ji)的進油(you)(you)(you)(you)(you)(you)管(guan)與(yu)所(suo)(suo)述(shu)(shu)進油(you)(you)(you)(you)(you)(you)裝(zhuang)置(zhi)(zhi)(zhi)連接(jie)(jie)(jie)，所(suo)(suo)述(shu)(shu)風(feng)(feng)冷(leng)單(dan)(dan)缸(gang)(gang)柴油(you)(you)(you)(you)(you)(you)發動(dong)(dong)機(ji)(ji)的回(hui)(hui)(hui)油(you)(you)(you)(you)(you)(you)管(guan)與(yu)所(suo)(suo)述(shu)(shu)回(hui)(hui)(hui)油(you)(you)(you)(you)(you)(you)穩壓裝(zhuang)置(zhi)(zhi)(zhi)連接(jie)(jie)(jie)。

在本發明的一個(ge)優選(xuan)實施(shi)例中，所述(shu)電控泵部件還包括一電磁(ci)(ci)閥(fa)部件，所述(shu)電磁(ci)(ci)閥(fa)部件包含電磁(ci)(ci)鐵(tie)和銜(xian)(xian)鐵(tie)，所述(shu)電磁(ci)(ci)鐵(tie)和銜(xian)(xian)鐵(tie)均為(wei)圓形，所述(shu)電磁(ci)(ci)鐵(tie)的直徑(jing)為(wei)27mm，電感量為(wei)150～250uh；所述(shu)銜(xian)(xian)鐵(tie)的直徑(jing)為(wei)20mm。

在本(ben)發明(ming)的一個優選實施例中，所(suo)述電控泵部件(jian)通過四個螺(luo)栓(shuan)安(an)裝在風冷單缸柴油發動機的缸體(ti)上，四個螺(luo)栓(shuan)之間的中心距為32mm×34mm。

本(ben)發明通(tong)過采用(yong)(yong)優(you)化設計小(xiao)圓(yuan)(yuan)形(xing)電(dian)磁鐵、優(you)化設計小(xiao)圓(yuan)(yuan)形(xing)銜(xian)鐵方(fang)式減小(xiao)電(dian)控(kong)(kong)單體泵(beng)安裝(zhuang)尺(chi)寸(cun)，縮短安裝(zhuang)孔孔距，從而(er)減輕單缸電(dian)控(kong)(kong)泵(beng)重(zhong)量，降低(di)使用(yong)(yong)成(cheng)本(ben)，適應更小(xiao)排量柴(chai)油(you)發動機需求。

本(ben)發明相(xiang)比于現有技術具有如下有益效果：

首先(xian)：本(ben)(ben)單(dan)(dan)(dan)缸(gang)電(dian)(dian)控(kong)泵(beng)(beng)(beng)與(yu)現有的(de)電(dian)(dian)控(kong)單(dan)(dan)(dan)體(ti)泵(beng)(beng)(beng)均為時間控(kong)制式(shi)電(dian)(dian)控(kong)燃(ran)油(you)(you)噴射系統，能在(zai)所有工(gong)況，由傳感器(qi)(qi)(qi)采集整車和(he)發動(dong)機運行工(gong)況及駕(jia)駛者的(de)操作意圖，ecu根據傳感器(qi)(qi)(qi)輸入(ru)(ru)的(de)信(xin)號，驅動(dong)電(dian)(dian)控(kong)單(dan)(dan)(dan)體(ti)泵(beng)(beng)(beng)電(dian)(dian)磁閥(fa)，通過電(dian)(dian)磁閥(fa)切換由柱(zhu)塞高(gao)(gao)速(su)運動(dong)產生的(de)高(gao)(gao)壓(ya)(ya)燃(ran)油(you)(you)的(de)流向，在(zai)適(shi)當(dang)的(de)時刻，高(gao)(gao)壓(ya)(ya)燃(ran)油(you)(you)通過高(gao)(gao)壓(ya)(ya)油(you)(you)管(guan)進(jin)入(ru)(ru)噴油(you)(you)器(qi)(qi)(qi)，噴油(you)(you)器(qi)(qi)(qi)將(jiang)高(gao)(gao)壓(ya)(ya)燃(ran)油(you)(you)噴入(ru)(ru)氣缸(gang)。由于采用電(dian)(dian)子控(kong)制和(he)高(gao)(gao)速(su)響應的(de)電(dian)(dian)磁閥(fa)，能夠(gou)實現噴油(you)(you)量(liang)、噴油(you)(you)正時和(he)噴油(you)(you)壓(ya)(ya)力(li)的(de)精(jing)確(que)、柔性(xing)(xing)(xing)(xing)控(kong)制，改善(shan)發動(dong)機缸(gang)內(nei)燃(ran)燒，從而降(jiang)低(di)發動(dong)機的(de)有害排放(fang)物(wu)，提高(gao)(gao)發動(dong)機的(de)經濟(ji)性(xing)(xing)(xing)(xing)、動(dong)力(li)性(xing)(xing)(xing)(xing)和(he)可(ke)駕(jia)駛性(xing)(xing)(xing)(xing)。其次：本(ben)(ben)單(dan)(dan)(dan)缸(gang)電(dian)(dian)控(kong)泵(beng)(beng)(beng)柱(zhu)塞上(shang)(shang)沒有調節(jie)油(you)(you)量(liang)的(de)斜(xie)槽，減少了(le)泄漏，提高(gao)(gao)了(le)剛度和(he)強度，通過調整柱(zhu)塞直徑與(yu)凸(tu)輪升(sheng)程，泵(beng)(beng)(beng)端壓(ya)(ya)力(li)可(ke)達(da)800bar以(yi)上(shang)(shang)，最高(gao)(gao)噴射壓(ya)(ya)力(li)達(da)到(dao)1400bar以(yi)上(shang)(shang)。最后(hou)：本(ben)(ben)電(dian)(dian)控(kong)單(dan)(dan)(dan)體(ti)泵(beng)(beng)(beng)通過采用優化(hua)設計小(xiao)(xiao)圓(yuan)形電(dian)(dian)磁鐵(tie)(tie)、優化(hua)設計小(xiao)(xiao)圓(yuan)形銜鐵(tie)(tie)縮小(xiao)(xiao)安(an)裝孔孔距，合理設計電(dian)(dian)池(chi)電(dian)(dian)磁鐵(tie)(tie)電(dian)(dian)感量(liang)滿足性(xing)(xing)(xing)(xing)能要求(qiu)，同時減輕電(dian)(dian)控(kong)單(dan)(dan)(dan)體(ti)泵(beng)(beng)(beng)重量(liang)，降(jiang)低(di)使用成本(ben)(ben)，性(xing)(xing)(xing)(xing)價(jia)比高(gao)(gao)，能在(zai)發動(dong)機不做(zuo)大的(de)改動(dong)下，實現采用單(dan)(dan)(dan)缸(gang)電(dian)(dian)控(kong)泵(beng)(beng)(beng)的(de)十千瓦以(yi)下風冷(leng)單(dan)(dan)(dan)缸(gang)柴油(you)(you)機排放(fang)水平由國二(t2)升(sheng)級到(dao)國三(t3)以(yi)上(shang)(shang)。

附圖說明

圖1是本發明風冷單(dan)缸(gang)柴油發動機燃油噴射單(dan)缸(gang)電控泵的(de)主視圖。

圖2為圖1的(de)a－a剖視圖；

圖3為圖1的(de)俯(fu)視圖。

具體實施方式

下面結(jie)合附圖和實施例(li)(li)對本發明(ming)進一步說(shuo)明(ming)，但并不因此將本發明(ming)限制在所(suo)述的(de)實施例(li)(li)范(fan)圍(wei)內。

參見圖(tu)1至圖(tu)3，圖(tu)中(zhong)所示的(de)一(yi)種風冷(leng)單(dan)(dan)缸(gang)柴(chai)油(you)(you)發(fa)動(dong)(dong)機(ji)燃油(you)(you)噴射單(dan)(dan)缸(gang)電(dian)控(kong)泵(beng),包(bao)括(kuo)電(dian)控(kong)泵(beng)部(bu)(bu)件(jian)1、挺住體(ti)(ti)部(bu)(bu)件(jian)5、進油(you)(you)裝置(zhi)、回油(you)(you)裝置(zhi),挺住體(ti)(ti)部(bu)(bu)件(jian)5與電(dian)控(kong)泵(beng)部(bu)(bu)件(jian)1中(zhong)的(de)柱塞(sai)1a的(de)下端連接(jie)；電(dian)控(kong)泵(beng)部(bu)(bu)件(jian)1直(zhi)接(jie)插入風冷(leng)單(dan)(dan)缸(gang)柴(chai)油(you)(you)發(fa)動(dong)(dong)機(ji)的(de)缸(gang)體(ti)(ti)中(zhong)并與風冷(leng)單(dan)(dan)缸(gang)柴(chai)油(you)(you)發(fa)動(dong)(dong)機(ji)的(de)缸(gang)體(ti)(ti)通過四(si)個螺(luo)栓1b連接(jie)，四(si)個螺(luo)栓1a之間的(de)中(zhong)心(xin)距為32mm×34mm，有效降低了安(an)裝孔距。

在(zai)電控泵部件(jian)1上安裝(zhuang)有一導(dao)(dao)向(xiang)套(tao)2并與導(dao)(dao)向(xiang)套(tao)2連(lian)為一體。導(dao)(dao)向(xiang)套(tao)2與風冷單缸(gang)(gang)柴油(you)發動機的(de)缸(gang)(gang)體連(lian)接。

進油裝置由進油螺(luo)釘(ding)6和(he)組(zu)合密封圈(quan)3組(zu)成，進油螺(luo)釘(ding)6和(he)組(zu)合密封圈(quan)3安(an)裝在導向(xiang)套2上。

回(hui)(hui)油(you)(you)穩壓(ya)(ya)裝(zhuang)置由穩壓(ya)(ya)閥部件4和(he)組(zu)合密(mi)封圈8組(zu)成，穩壓(ya)(ya)閥部件4和(he)組(zu)合密(mi)封圈8安(an)裝(zhuang)在(zai)所述導向(xiang)套2上；風冷單(dan)缸(gang)(gang)柴油(you)(you)發動(dong)機(ji)的(de)進(jin)油(you)(you)管與進(jin)油(you)(you)螺釘(ding)6連接(jie)，風冷單(dan)缸(gang)(gang)柴油(you)(you)發動(dong)機(ji)的(de)回(hui)(hui)油(you)(you)管與穩壓(ya)(ya)閥部件4連接(jie)。

電(dian)(dian)(dian)控泵(beng)部件2還(huan)包括一電(dian)(dian)(dian)磁(ci)(ci)閥部件，電(dian)(dian)(dian)磁(ci)(ci)閥部件包含(han)電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)9和銜(xian)(xian)鐵(tie)10，電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)9和銜(xian)(xian)鐵(tie)10均為(wei)圓(yuan)形，電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)9的(de)直徑為(wei)27mm，電(dian)(dian)(dian)感(gan)量為(wei)150～250uh；銜(xian)(xian)鐵(tie)10的(de)直徑為(wei)20mm。

本電控單體泵的工作原(yuan)理如下：

風冷單(dan)缸(gang)(gang)發(fa)動(dong)(dong)機(ji)(ji)油(you)(you)(you)(you)(you)泵(beng)(beng)(beng)(beng)凸輪軸旋轉運動(dong)(dong)來驅動(dong)(dong)挺住體部(bu)件(jian)5上(shang)下運動(dong)(dong)，電(dian)(dian)控(kong)(kong)泵(beng)(beng)(beng)(beng)單(dan)體泵(beng)(beng)(beng)(beng)部(bu)件(jian)中(zhong)(zhong)的(de)(de)(de)柱塞1a在挺住體部(bu)件(jian)5的(de)(de)(de)驅動(dong)(dong)下向(xiang)上(shang)運動(dong)(dong)壓縮柱塞腔中(zhong)(zhong)的(de)(de)(de)燃(ran)油(you)(you)(you)(you)(you)，燃(ran)油(you)(you)(you)(you)(you)壓力升(sheng)高(gao)，電(dian)(dian)子(zi)控(kong)(kong)制單(dan)元驅動(dong)(dong)模(mo)塊在適當(dang)的(de)(de)(de)時刻給電(dian)(dian)控(kong)(kong)單(dan)體泵(beng)(beng)(beng)(beng)部(bu)件(jian)中(zhong)(zhong)的(de)(de)(de)電(dian)(dian)磁鐵9通電(dian)(dian)，燃(ran)油(you)(you)(you)(you)(you)壓力迅速升(sheng)高(gao)，高(gao)壓燃(ran)油(you)(you)(you)(you)(you)通過(guo)高(gao)壓油(you)(you)(you)(you)(you)管，開啟噴(pen)油(you)(you)(you)(you)(you)器(qi)，燃(ran)油(you)(you)(you)(you)(you)噴(pen)入發(fa)動(dong)(dong)機(ji)(ji)氣缸(gang)(gang)。當(dang)符合要求(qiu)的(de)(de)(de)燃(ran)油(you)(you)(you)(you)(you)數量噴(pen)入氣缸(gang)(gang)后(hou)，電(dian)(dian)子(zi)控(kong)(kong)制單(dan)元驅動(dong)(dong)模(mo)塊停止給電(dian)(dian)控(kong)(kong)單(dan)體泵(beng)(beng)(beng)(beng)部(bu)件(jian)中(zhong)(zhong)的(de)(de)(de)電(dian)(dian)磁鐵9通電(dian)(dian)，高(gao)壓燃(ran)油(you)(you)(you)(you)(you)從高(gao)壓油(you)(you)(you)(you)(you)路(噴(pen)油(you)(you)(you)(you)(you)器(qi)、高(gao)壓油(you)(you)(you)(you)(you)管、電(dian)(dian)控(kong)(kong)單(dan)體泵(beng)(beng)(beng)(beng)部(bu)件(jian))流(liu)出，通過(guo)回油(you)(you)(you)(you)(you)裝(zhuang)置回到發(fa)動(dong)(dong)機(ji)(ji)油(you)(you)(you)(you)(you)箱油(you)(you)(you)(you)(you)路當(dang)中(zhong)(zhong)，壓力迅速下降(jiang)(jiang)，噴(pen)油(you)(you)(you)(you)(you)器(qi)關閉，噴(pen)油(you)(you)(you)(you)(you)結束(shu)。當(dang)進(jin)入凸輪廓(kuo)線下降(jiang)(jiang)段(duan)，電(dian)(dian)控(kong)(kong)單(dan)體泵(beng)(beng)(beng)(beng)部(bu)件(jian)中(zhong)(zhong)的(de)(de)(de)柱塞1a向(xiang)下運動(dong)(dong)，通過(guo)進(jin)油(you)(you)(you)(you)(you)裝(zhuang)置從單(dan)缸(gang)(gang)發(fa)動(dong)(dong)機(ji)(ji)油(you)(you)(you)(you)(you)箱油(you)(you)(you)(you)(you)路中(zhong)(zhong)吸油(you)(you)(you)(you)(you)，使柱塞腔中(zhong)(zhong)充滿燃(ran)油(you)(you)(you)(you)(you)，為下次噴(pen)油(you)(you)(you)(you)(you)作(zuo)好準備。