Automatic Control of Excess Fuel W HAT appears to be a
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simple and Practical method of providing automatic control of the -supply of excess fuel to an oil engine has recently been patented by Mr. T. BertvviStle, 3, Regent Drive, Skipton, Yorks. Whilst the normal manual meansis convenient when starting from cold,: or in other circumstances when an engine will not start easily, it is open to abuse.
In this automatic system the inventor has arranged for a cylinder and piston to be secured to the pump governor casing, as shown in the accompanying drawing. Means are provided to connect the piston to the rod which operates the adjustable stop. for the fuel-pump control rod:
It is proposed that the piston be operated either by pressure from a compressor, or by a partial vacuum from an exhauster. When the engine is stationary, a spring serves to force the control rod to assume its excess delivery position. . Immediately the engine 'has started
and the control rod moves away from the excess-fuel position, thus releasing the 'excess-fuel stop, the conEra! device, under the influence of pressure or suction, moves the excessfuel stop out of action. It is held out of action while the engine is running, so that maximum fuel supply is limited by the normal full-load stop.
When the engine stops, the pressure oe suction ceases and the device -operates through spring pressure to bring the excess-fuel stop back to its operating The drawing .shows the device arranged for operation by suction from an exhauster, in which form it has given satisfactory results. Where it is intended for pressure operation, such pressure would, of course, take effect on the underside of the piston. The use of pressure would necessitate a slightly different construction, but the inventor has devised a suitable arrangement.
" The Commercial Motor '7. understands that the inventor wishes to get into touch with someone who would. develop his idea