| 摘要 |
A cut-off fuel exhuast mechanism in a fuel injection pump comprises a pump housing which defines a pump house, a fuel passage communicating with the pump house formed in the housing, a plunger barrel secured to the pump housing and provided with an intake port opened up on its periphery and communicating with the fuel passage, and a pressurized chamber defined by a shaft end of a plunger which is pivotably and slidably contained in the plunger barrel and being able to communicate with the intake port, the plunger barrel being provided with an oil passage communicating with the pressurized chamber separately from the intake port, the pump housing being provided therein with an exhaust passage communicating with the pump house, the oil passage and exhaust passage being caused to communicate with each other at the end of fuel injection, cut-off fuel remained in the pressurized chamber being directly exhausted into the pump house and not via the fuel passage.
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