| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply pump for cooling a bush without giving an influence on a discharge amount from a low-pressure pump.SOLUTION: A fuel supply pump 1 has a cooling passage 30 which makes fuel discharged from a low-pressure pump 3 serve as a medium to cool a bush 14 by passing through an outer circumferential side of the bush 14. According to this, the bush 14 is cooled by passing the fuel discharged from the low-pressure pump 3 not through a clearance (inner circumferential side of the bush 14) but through the outer circumferential side of the bush 14, so the fuel discharged from the low-pressure pump 3 does not leak via the clearance. Accordingly, the bush 14 can be cooled without giving an influence on the amount discharged from the low-pressure pump 3. |
