《柴油機(jī)噴油泵之供油提前角調(diào)整》最新

1、優(yōu)質(zhì) 優(yōu)質(zhì) 完整 完整 新穎 新穎1 / 21 21柴油機(jī)噴油泵之供油提前角調(diào)整摘要噴油泵是柴油機(jī)的重要組成部分，它在柴油機(jī)上的作用是按照柴油機(jī)的工作順序，將低壓燃油壓縮成高壓燃油，定時(shí)、定量地通過噴油器將霧狀燃油噴入燃燒室內(nèi)燃燒做功，并能根據(jù)操作人員的要求及柴油機(jī)工作負(fù)荷的變化，自動(dòng)控制和調(diào)整噴油泵供油量。因此，柴油機(jī)工作性能的 好壞，在很大程度上取決于噴油泵是否在正常工作。供油提前角是指噴油泵第 1 缸柱塞開始供油時(shí)到該缸活塞行

2、至上止點(diǎn)時(shí)曲軸轉(zhuǎn)動(dòng)的角度。供油提前角過大或過小都會(huì)影響發(fā)動(dòng)機(jī)的工作性 能。過大或過小會(huì)造成噴油泵噴油時(shí)間過早或過晚：噴油時(shí)間過早則燃油燃燒不充分，過晚則會(huì)冒白煙，燃油也會(huì)燃燒不充分，這就使燃燒過程不是處于最佳狀態(tài)。汽車行駛一定里程或在維修中噴油泵檢修后經(jīng)過調(diào)試重新安裝時(shí)，必須檢查與調(diào)整供油正時(shí)，以保證柴油機(jī)經(jīng)常在最佳或接近最佳供油提前角情況下工作。 關(guān)鍵詞：柴油機(jī) 噴油泵 噴油器 正時(shí)標(biāo)記 供油提前角 Abst

3、ract AbstractThe fuel injection pump is an important part of the diesel engine. Its function on the diesel engine is to compress the low pressure fuel into the high pressure one according to the working or

4、der of the diesel engine, and atomize the fuel through the injector with a given time and amount into the combustion chamber for burning. And it can automatically control and adjust the fuel amount based on the operator’

5、s requirements and the working load change of the diesel engine. Therefore, the work performance of the diesel engine will depend to a large extent on whether the pump can regularly work or not. The advanced angle for t

6、he oil supply timing is referred to the one that the crankshaft rotates from the time when the piston in the cylinder 1 of oil injection pump begins to eject oil to the one when the piston moves to the TDP. Too big or

7、too small advanced angle for the oil supply can affect the work performance of engine. That will cause too early or too late oil injection time : too early oil injection will lead to not combust amfully. Too late oil in

8、jection will bring smoke and make fuel not combust amfully. These make combustion not to be the best state. The fuel supply timing must be check and adjust when the fuel injection pump is installed after being check an

9、d adjust when the vehicle run for a few miles or is in the repair. It can ensure diesel engine to work in the best or almost best fuel supply advanced angle.Keywords Keywords：Diesel engine fuel injection pump injecto

10、r timing mark advanced angle for the oil supply1 概述優(yōu)質(zhì) 優(yōu)質(zhì) 完整 完整 新穎 新穎3 / 21 21圖１ 噴油器示意圖柴油機(jī)燃料輸送的簡(jiǎn)單過程( 如下圖２)是：輸油泵將柴油從燃油箱中吸出送到濾清器（柴油壓力被提高到 0.15～0.30Mpa 左右），過濾后進(jìn)入噴油泵（為了保證充足的燃料并保持一定的壓力，要求輸油泵的供油量比噴油泵的需要量要大得多，多余的柴油就經(jīng)低壓油管回到油

11、箱），噴油泵又將柴油壓力進(jìn)一步提高至 10Mpa 以上，再經(jīng)過高壓油管進(jìn)入噴油器直接以霧狀噴入汽缸燃燒室中與空氣混合后壓燃。輸油泵供給的多余柴油以及噴油器頂部回油孔流出的少量柴油，都經(jīng)回油管流回燃油箱（示意圖是柴油機(jī)燃料供給系統(tǒng)，鮮紅色管路是高壓輸油管、黃褐色管路是低壓輸油管、紫紅色管路是回油管）。圖２ 燃料輸送的簡(jiǎn)單過程為了使柴油機(jī)能在怠速穩(wěn)定工作和限制柴油機(jī)超速，在噴油泵上還帶有調(diào)速器.1.3 調(diào)速器調(diào)速器在 VE型分配泵的上部，是