Turbocharged four-stroke/cycle diesel engines utilize valve overlap for（）.
- Aimproving cylinder scavenging
- Bpreheating the combustion chamber
- Creducing air charge density
- Dpreventing valve wear
问题
Turbocharged four-stroke/cycle diesel
参考解析：
分类：船舶电气与船舶安全题库
相关推荐
-
1、A turbocharged, four-stroke/cycle dies
A turbocharged, four-stroke/cycle diesel engine has a larger valve overlap than a naturally aspirated four-stroke/cycle diesel engine, in order to...
-
2、In a four-stroke cycle diesel engine t
In a four-stroke cycle diesel engine the intake valves open （）Abefore TDC and close after BDCBafter TDC and close after BDCCbefore TDC and close before BDCDafter TDC and close before BDC
-
3、Scavenging in a four-stroke/cycle dies
Scavenging in a four-stroke/cycle diesel engine occurs during the （）.Alast part of the exhaust stroke, and the first part of the intake strokeBlast part of the intake stroke onlyCearly part of the injection stroke onlyDearly part of the power stroke
-
4、If a four-stroke/cycle diesel engine i
If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）Aon the power strokeBon the exhaust strokeCat the end of the power strokeDat the start of the intake stroke
-
5、In a four-stroke/cycle diesel engine,
In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive（）.Aexhaust pressureBexhaust temperaturesCcooling water temperaturesDlube oil consumptio
-
6、Compared to four-stroke/cycle engines,
Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of （）Aless even torqueBhigher cylinder head temperaturesCfewer power strokes per revolutionDgreater weight/size requirement