| 摘要 |
<p>An oil metering pump for metering oil to lubricate an engine's gas seals has a pump section that delivers oil at a rate that increases with increasing engine load, a pressure control valve that operates to control the pumped oil so that its pressure is dependent on that developed by the pumping pump section and is independent of varying inlet pressure to the pump, and a discharge-bypass valve that is driven at a speed proportional to engine speed and operates to alternately deliver the pressure controlled oil back to the pump inlet and to lubricate the seals so that there is maintained substantially uniform oil flow for seal lubrication at constant engine loads.</p> |
