GB187237A - Improvements relating to engines of the slow combustion type - Google Patents

Abstract

187,237. Veyre, G. A. Oct. 13, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Cylinders receiving liquid fuel; water, supplying to cylinders.-In a four-stroke-cycle engine, each cylinder is provided with a separate combustion chamber which is charged with air or mixture from another cylinder in which the piston is making its compression stroke. In the fourcylinder engine shown, each of the combustion chambers 1 - - 4 is separated from the corresponding cylinder by a wall having a mechanically actuated valve m<1>, and is connected to another cylinder by a conduit provided with a mechanically-actuated valve c<2>. The cylinders are also provided with the usual inlet and exhaust valves a, e, and the combustion chambers are provided with inlets d' for the injection of fuel under pressure. The combustion chambers are lined with refractory material and filled with pieces of a porous refractory substance. In operation, the piston p<2> draws in air on the inlet stroke, and towards the end of the compression stroke the valve c<2> is opened and admits the air to the combustion chamber 1. At the same time, fuel is injected by a pump through the inlet d<1> and combustion takes place at constant volume during the next three piston strokes. The valve m<1> opens at the beginning of the power stroke of the piston p<1>, which takes place at the same time as the compression stroke of the piston p<2>. Towards the end of this power stroke the valve m<1> is closed at the same time as the opening of the valve c<2> in the second cylinder. Exhaust takes place in the usual way through the valve e. To prevent overheating of the combustion chambers, water is injected through inlets e<1> immediately after the admission of fuel. In modifications, the air is delivered to the combustion chamber of the cylinder in which the exhaust or the inlet stroke is being completed. In a single-cylinder engine, the piston compresses, the air through a valve such as c<1> into a storage reservoir, from which it is delivered into the combustion chamber through a controlled valve when the piston is at the end of the power stroke or later. Such a storage reservoir may also be employed in multicylinder engines, all the cylinders delivering into this reservoir, which is connected in turn to each of the combustion chambers. The engine is started by admitting a combustible mixture from a light-fuel carburettor through the inlet valves a and the mixture, is ignited in the combustion chambers by means of sparking plugs o, until the refractory material is sufficiently heated.