回复：认为柴油机长寿是个很诙谐的看法，汽油机用二三十年的也有的是

来源: 于 2011-09-22 13:16:40 [旧帖] [给我悄悄话] 本文已被阅读：次

Advantages of a Diesel Engine
The diesel engine is much more efficient and preferable as compared with gasoline engine due to the following reasons:

  • Modern diesel engines have overcome disadvantages of earlier models of higher noise and maintenance costs.  They are now quiet and require less maintenance as compared with gas engines of similar size.
  • They are more rugged and reliable.
  • There is no sparking as the fuel auto-ignites. The absence of spark plugs or spark wires lowers maintenance costs. 
  • Fuel cost per KiloWatt produced is thirty to fifty percent lower than that of gas engines.
  • An 1800 rpm water cooled diesel unit operates for 12,000 to 30,000 hours before any major maintenance is necessary. An 1800 rpm water cooled gas unit usually operates for 6000-10,000 hours before it needs servicing.
  • Gas units burn hotter than diesel units, and hence they have a significantly shorter life compared with diesel units.

 

你的关于污染的评论脱离了效率这点,同样开相同距离,柴油用量少于汽油,尽管其污染产量比率比汽油高,但就这相同距离的排放,柴油未必比汽油高.