| 摘要 |
A three cylinder inline reciprocating piston internal combustion engine is disclosed in which an inner cylinder 12 of the three cylinders 11, 12 and 13 may be selectively deactivated in order to improve fuel consumption or assist with engine heat-up by for example increasing the exhaust gas temperature thereby assisting with light-off of an exhaust gas after treatment device 20 such as a NOx trap, soot trap diesel or catalytic convertor. The engine 5 has a flat plane crankshaft 40 having three throws 11T, 12T, 13T. The throws 11T, 13T for the two outer cylinders 11, 13 are in phase and the throw 12T for the inner cylinder 12 is 180 degrees out of phase. The inner cylinder 12 is deactivated by cutting off a fuel supply to the cylinder 12.
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