| 摘要 |
PURPOSE:To improve the fuel injection characteristics and also reduce the cost of overall engine by utilizing the characteristics of an electronic control-type fuel injection pump to the maximum. CONSTITUTION:Lengths of injection pipes 24a, 24b, 24c are extremely shortened by fitting a fuel injection pump 20 at nearly the center of both end cylinders of a cylinder block 1. Thereby, the injection pressure reduction, injection lag, etc. can be prevented from occurring. In addition, lengths of individual injection pipes can be made nealy equal, thus the dispersion of injection characteristics among cylinders can be practically suppress. In this case, a pump fitting casing 30 is molded in one body with a cylinder block 1, and in addition, a seat face 30a is made a parallel plane with the same height as a top deck 1a, therefore, lengths of the injection pipes can be further shortened, and the number of assembly parts and assembly processes can be reduced. |
