Quality regulated single piston high-pressure fuel pump for fuel injection engines has high-pressure pump area formed over piston top side and second pump chamber formed under its lower surface by tapering of piston

摘要

Fuel pump (1) has pump piston lower side (6) within high-pressure pump surface and piston top side (5) proceeds with piston rod sealed to surrounding so that upper and lower surfaces of pump piston (7) have equal areas. High-pressure pump area is formed over topside of piston and second pump chamber formed under its lower surface by tapering of piston between its lower surface and sealing ring towards pump drive.