| 摘要 |
A fuel injection pumping apparatus for supplying fuel to an internal combustion engine includes an injection pump to which fuel is supplied by a feed pump under the control of an operator adjustable throttle means. A valve is provided intermediate the throttle means and the injection pump and includes a valve element which is subject to the outlet pressure of the feed pump and which throttles the flow of fuel between the throttle means and the injection pump. As the outlet pressure of the feed pump increases, the throttling effect of the valve element is reduced. The force exerted by the spring on the valve element is determined by a device which is responsive to the pressure of air supplied to the associated engine and the disposition of the device is such that as the pressure of air supplied to the engine increases, the throttling effect provided by the valve element decreases.
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