GB347797A - Improvements in the construction and method of working internal combustion engines - Google Patents

Abstract

347,797. Two- and four-stroke engines cooling cylinders. LE MESURIER, H. E., 63, Solon Road, Acre Lane, Brixton, London. Feb. 24, 1930, No. 6019. [Class 7 (ii).] Cylinders are cooled internally by water which is admitted with the combustible mixture from a nozzle in the induction or transfer pipe, substantially all external cooling arrangements being thus avoided; lagging is also dispensed with. The engine may be compounded as described in Specification 276,087, [Class 7 (ii), Internal-combustion engines, Arrangement &c. of]. Fig. 1 shows a single cylinder compound engine which exhausts through a lagged pipe 3 to the underside of the piston and finally through a disc valve 4 and pipe 5 to a condenser 10, the condensate passing through a filter 7 to a nozzle 8 in the induction pipe ; the water supply may be augmented from a tank outside the circuit. In a four-cylinder engine, Fig. 2, exhaust from any one cylinder is led by U-pipes 3<1> and expanded on the undersides of 2 pistons before passing through disc valves 4<1> and a common exhaust pipe to the condenser. Fig. 3 shows a four-cylinder engine in which exhaust is led alternately by lagged pipes 3<11> to opposite ends of an expansion cylinder 13 provided with exhaust valves 4<11>. A centrifugal cleaner and an expansion chamber may be provided in the exhaust system. The condenser 10 may comprise a box having partitions 11, a corrugated exterior and air slots parallel to the plane of the paper. Fig. 7a shows a radial-cylinder engine which may be enclosed in a corrugated detachable metal casing 101 which acts on the condenser and from which the condensate is drawn to the filter 7. The sparking plugs 20 and high tension leads are preferably outside the casing. In a rotating cylinder engine the circular casing 101 may, or may not, rotate with the cylinders. Similar arrangements are described for two-stroke engines and the crank chambers may be lagged and separated from the cylinders by heat-insulating partitions as described in Specification 276,087. The exhaust gas may be finally used to drive a turbine. The general arrangements for the admission of the cooling water into the induction or transfer pipes are similar to those described in Specification 239,896, [Class 7 (ii), Internal-combustion engines, Arrangement &c. of], and include means for admitting the water when the cylinder is sufficiently heated, for cutting off the water and draining the cylinders when the engine stops, and for stopping the engine if the water supply fails; simultaneous control of the water supply and the throttle valve; supplying the water in the form of a petrol-water emulsion. When slight external cooling of the cylinders is necessary, half the radiator may be used as a watercooler and half as a condenser. Specifications 12165/92 and 23359/08, [both in Class 7, Air and gas engines], 4987/12 and 180,068, [both in Class 7 (ii), Internal-combustion engines, Arrangement &c. of], also are referred to. Reference has been directed by the Comptroller to Specification 276,087.