| 摘要 |
An advance arrangement is described including an advance piston slidable within a bore and defining, with the bore, a control chamber. A restricted passage permits fluid to escape from the control chamber at a controlled rate. A pump supplies fluid to the control chamber, the rate at which fluid is supplied to the control chamber relative to that at which the fluid can escape controlling the position of the advance piston. The pump is independent of a feed pump used to supply fuel to the high pressure pump with which the advance arrangement is used.
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