| 摘要 |
PROBLEM TO BE SOLVED: To reduce slide resistance and improve seizure resistance by providing a pintle valve on the opposite inclined shaft side of a cylinder and providing a balance groove parallel to a pintle valve groove on the periphery of the pintle valve in a fluid supply pump provided with a swash plate and reciprocating plural pintles. SOLUTION: In a swash plate type fuel supply pump for supplying low- viscosity fuel for direct fuel injection in an engine cylinder, an inlet port 16 of a rear cover 14 communicates with a crank chamber 20 in a housing 12 and communicates with a pintle valve 22 coaxial with the rotary shaft of the cylinder. The pintle valve 22 has a first intake pressure groove 24, a communicating path 22a to this intake pressure groove 24, a first delivery pressure groove 30, and a communicating path 60 from this delivery pressure groove 30 to the delivery port. This pintle valve 22 is also provided with a balance groove consisting of a second intake pressure groove 32 to communicate with the intake pressure groove 24 and the delivery pressure groove 30, and a second delivery pressure groove 34, thereby the radial force from each groove due to the intake and delivery pressures is balanced and the generation of the radial force to the cylinder is restricted. |
