Then diesel fuel oil is injected or sprayed into the cylinder at the end of the compression stroke . 然后在壓縮沖程即將結(jié)束時,柴油燃料被噴射或被噴霧進入氣缸。
Exchange - compression stroke 換氣壓縮行程
It was found that the compression speed and compression stroke are the two factors affecting the molding pressure most significantly 由模擬找出了壓縮速度與壓縮行程是兩個影響成型壓力極大的因素。
It was found that the compression speed and compression stroke are the two factors affecting the molding pressure most significantly 由仿真找出了壓縮速度與壓縮行程是兩個影響成型壓力極大的因素。
Using lower switch time , lower compression speed and higher compression stroke will result in lower cavity pressures 使用較短的切換時間、較低的壓縮速度以及較高的壓縮行程將產(chǎn)生較低的模安穴壓力。
This is the four - stroke cycle which is in common use . an alternative is the two - stroke cycle , which combines the exhaust and compression strokes into one 這就是常用的四沖程循環(huán)。另一種循環(huán)是兩沖程循環(huán),它把排氣沖程與壓縮沖程合并為一個沖程。
When the engine runs in compression stroke and power stroke , the valves must close tightly on their seats to produce a gas - tight seal and thus prevent the gases escaping from the combustion chamber 當(dāng)發(fā)動機處于壓縮行程和做功行程時,閥門必須緊緊地關(guān)閉以產(chǎn)生一個不透氣的氣封,以防止氣體逃離燃燒室。
In this paper , the general theory and numerical solution procedure were described . by building a diesel modeling with vertical valves and a piston bowl , a whole cycle was calculated , which include intake stroke , compression stroke , expansion stroke and exhaust stroke 通過對帶有進、排氣門的柴油機進行計算,模擬了一個完整循環(huán)內(nèi)進氣道、氣門和缸內(nèi)氣體流動的全過程。
Simulation and the associated numerical algorithm on the injection - compression molding ( icm ) process were developed to understand processing characteristics by changing processing parameters including compression speed , switch time from injection to compression , compression stroke as well as initial cavity thickness and part thickness using disk parts 摘要射出壓縮成型的仿真以及數(shù)值運算是要了解成型參數(shù)的改變,包括:壓縮速度、射出與封裝的切換時間、壓縮行程等制程特性而創(chuàng)建的,同時也包含了初始的開模厚度以及使用在光盤片的成品厚度。
On the basis mentioned above , another mathematical model for the supercharged diesel was set up . according to this model some results of simulation calculations were given . the characteristics of operation of the diesel in wet compression : including the excess air coefficient , the cylinder temperature at the beginning of compression stroke , the maximum temperature in the cylinder , the cylinder thermal load , the specific fuel consumption , and efficiency of diesel engine were obtained 在此基礎(chǔ)上,又建立了增壓柴油機濕壓縮的數(shù)學(xué)模型,對噴水后柴油機的各性能參數(shù),諸如過量空氣系數(shù)、氣缸進氣溫度,缸內(nèi)最高溫度、氣缸熱負荷、比油耗、熱效率等進行了仿真計算,為增壓柴油機進口加濕技術(shù)的研究提供了理論依據(jù)。