| 摘要 |
A fuel injection nozzle for internal combustion engines is proposed which has a stepped piston which converts a medium pressure in the fuel inflow line into high pressure in accordance with the ratio between its piston surface areas. The stepped piston and the high-pressure chamber are disposed to surround the valve needle in accordance with the invention, resulting in a space-saving embodiment. The closing spring of the valve needle can be advantageously accommodated in the high-pressure chamber and can simultaneously act as the return spring for the stepped piston so that a separate part for that purpose can be dispensed with. |
