| 摘要 |
A low emission power generating apparatus which comprises a modified two- stroke diesel engine component (12) and modified turbocharger component (14) which has a relatively low aspect ratio. The diesel engine component (12) is a modification of a conventional two-stroke diesel engine design and includes an exhaust valve c am of unique design that has a cam profile which results in a later-than-normal exhaust valve (24) opening and an earlier-than-normal valv e closing so that the time during which the exhaust valve (24) remains open is shorter than normal, thereby causing a substantially greater volume of residual gases to remain in the combustion chamber (18) following the scavenge stroke. Reduction in peak combustion temperature advantageously results in the lower than normal production of nitrogen oxide and, therefore, allows advancement of the injection timing , while still maintaining the NOx emissions coming form the engine lower than those legislatively mandated. The modified turbocharger component (14) provides an additional charge of oxygen-rich air into the combustion chamber (18). |
