The cycle of operation of the four-stoke engine begins with the piston at TDC and the intake valve open.
四冲程发动机的工作循环是以活塞在上止点、进气门打开为开始的。
The effects of integrated and separated intake ports on cyclic variation of combustion pressure in a four-valve gasoline engine were analyzed with a CB-466 combustion analyzer on the engine test-bed.
在发动机试验台上，利用CB-466燃烧分析仪研究了整体式和分体式进气道对四气门汽油机燃烧压力循环变动的影响。
There are some different ways of arranging porting for the four-valve diesel engine, such as two helical intake ports, two tangential intake ports or one helical port and one tangential port etc.
四气门柴油机进气道可以选用不同类型的进气道进行组合，如二个螺旋进气道、二个切向进气道或一个切向进气道一个螺旋进气道等。
The cyclic variation of the combustion pressure in the cylinder of a four-valve gasoline engine was analyzed at low speed and light load with the CB-466 combustion analyzer on the engine test-bed.
在发动机试验台上，用CB-466燃烧分析仪对四气门汽油机低速低负荷燃烧压力循环变动进行了试验研究。
The results show that the Angle between maxi - mum tumble axis and crank axis generated by each cylinder in a four-valve gasoline engine varies.
发现四气门汽油机各缸产生的最大滚流轴线与曲轴轴线夹角是不同的。
The research and analysis of the in-cylinder flow fields in a four valve engine under the motored condition have been carried out.
在倒拖工况下对四气门发动机气缸内流场进行了实验研究和分析。
There will be two four-cylinder engine choices on offer: one is a 1.5-liter unit with variable valve timing and either a four-speed automatic or a five-speed manual transmission.
该车可提供两种引擎以供选择，一种是1.5升可变气门正时引擎配备四速自动或五速手动变速器。
There will be two four-cylinder engine choices on offer: one is a 1.5-liter unit with variable valve timing and either a four-speed automatic or a five-speed manual transmission.
该车可提供两种引擎以供选择，一种是1.5升可变气门正时引擎配备四速自动或五速手动变速器。
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