| 摘要 |
<p>An injection fuel pump comprises a pump body (16), a drive shaft (31) assembled into the pump body, a piston-drive cam (30) assembled onto the drive shaft, and one or more cylinder heads (17), each of the cylinder heads comprise a pump piston (19) inserted in a cylinder bore, wherein the pump piston is fitted with one or more all-metal-seal rings (20), wherein the pump piston that is fitted with one or more all-metal-seal rings has a cross-sectional area that is the same as the cylinder bore cross-sectional area, as such creating zero internal leakage. In one embodiment, the all-metal-seal rings are coiled felt seals. The injection fuel pump can be operated at low speed thereby prolonging the life of the pump and ensuring the constant high performance of the pump throughout its life, and dampening the diesel engine's vibrations, providing a quieter and comfortable car ride.</p> |
