Metered fuel injection apparatus

Claim 1

A metered fuel injection apparatus for sequentially injecting metered fuel from a fuel-tank into the respective combustion chambers of a multi-cylinder engine and each cylinder having its own fuel injection nozzle, said apparatus being removably connectable with elongate hoses respectively leading into a reservoir of motive hydraulic liquid stored at a finite reservoir-pressure value, a fuel-hose to said fuel-tank, and also a supply-line from a pumping means for delivering hydraulic liquid from the reservoir at input-pressure which exceeds reservoir-pressure, said apparatus comprising: A. an upright housing surrounding an upright rotary shaft lying along a vertical-axis and comprising a plurality of compartments spaced at regular angular increments around said shaft, each compartment being equipped with a single upright fluid-impervious semi-rigid diaphragm-like barrier defining two subcompartments including firstly a fuel-chamber and secondly a single hydraulic-chamber extending continuously and without interruption both to a rotary inlet-valve and to a rotary outlet-valve, fuel-inlet means and incoming checkvalve communicating between the fuel-chambers and the fuel-hose, fuel-outlet means communicating from each fuel-chamber through an outgoing checkvalve to a said fuel injection nozzle, liquid-outlet means communicating from the respective hydraulic-chambers to said exhaust-hose, and liquid-inlet means regularly angularly spaced about said shaft and communicating from said inlet-valve to each hydraulic-chamber; B. said rotary type inlet-valve being co-rotatational with said upright rotary shaft and located within said housing at the juncture of the supply-line and the angularly spaced liquid-inlet means whereby said inlet-valve is capable of delivering regularly-timed pulses of motive hydraulic liquid at input-pressure through said liquid-inlet means sequentially into the said hydraulic-chambers and whereby the respective divider-walls sequentially flex into the fuel laden fuel-chamber to deliver a metered fuel batch through said outgoing checkvalve and its nozzle; and C. said rotary type outlet-valve being co-rotational with said upright rotary shaft and located within said housing in vertical alignment with but angularly lagging the inlet-valve, said lagging outlet-valve being at the liquid-outlet means thereby being capable of exhausting motive hydraulic liquid from said hydraulic-chamber at less than input-pressure along said liquid-outlet means into the reservoir after the divider-wall diaphragm has already delivered a fuel batch to the injection nozzle.