Patent GB-190600427-A (GB)
Title: Improvements in Heat Engines.
Inventor: LAKE SIMON
Filed: 1906-01-06
Granted: 1906-11-01
Abstract: 427. Lake, S. Jan. 6 Internal-combustion engines of the continuouscombustion type. An n engine using kerosene, benzene, naphtha,&c.,and suitable for ships, and for winding and hauling engines, and other purposes, is shown in Fig. 1. It comprises a two-stroke cycle single-acting power cylinder A and a pair of combustion chambers B, B' which alternately discharge into the working cylinder during successive out-strokes of the piston a'. Air for supporting combustion in the chambers B, B' is drawn into the working cylinder A on the up-stroke of the piston through valves d, d<1>, Fig. 4, and on the return stroke is alternately forced into the combustion chambers through valve-controlled passages, one of which is shown at DFig. 1, controlled by valves 3, 4. Valve-controlled passages C place the cylinder and each combustion chamber in communication during alternate down-strokes of the working piston. Liquid fuel is sprayed into the combustion chambers through suitable openings (not shown), and impinges on 'conical projections, one of which is shown at 73, Fig. 1, which break up the jets. If preferred, gaseous fuel may be used.. Steam, generated from the cooling water, and stored in the float chamber G, Fig. 9, may be injected into the combustion projects as they enter the working cylinder through the ports c. Pipes 51, 52, Fig. 1, project into the combustion chamber and serve to inject water or steam, for cooling and scavenging, towards the end of the working strokes. The cylinder is jacketed with asbestos or other non-conducting material while the combustion chambers are lined with refractory material 17 and insulated from the water jackets by asbestos packing 18. Pumps; cylinders, cooling. The suction strokes of the fuel pumps 19, 19<1>, Figs. 1 and 4, are effected by cam-operated levers 20, and the forcing strokes by springs enclosed in the casings 22,22<1>. Cylinder cooling-water pumps are shown at 23, 31, Fig. 4. The eccentric - operated pump 23 forces water through the hollow supporting columns, three of which 25, 26, 27 are shown in Figs. 1 and 4, into the bottom cylinders and combustion-chamber cover. Thence it passes to the upper cover through a pipe 29, Fig. 9, and finally to the float chamber G through a pipe 94. Water from the float chamber passes by way of the pipe 95 to a pump 31 which circulates water through the cylinder and combustion-chamber jackets and back to the float chamber through the pipe 31<1>. The position of the watersupply valve 91 is controlled by the float 90. A cam-operated pump for injecting water into the combustion chambers is described in which the stroke may be adjusted by varying the position of the pump on its supporting column. The suction stroke of the pump is effected by a spring. The lower end of the working cylinder serves as a pump for charging the chambers B, B' and the air reservoir H, Fig. 9. Starting; stopping; reversing; igniting.-Air under pressure for starting and reversing may be forced into the reservoir H, Fig. 9, on alternate down strokes of the working-piston a<1>. The air leaves the combustion chambers by the outlet pipes 55 or 56, the fuel supply to the discharging chamber being temporarily cut off. Reversing is effected by imparting a longitudinal movement to a rod 61, Fig. 1, which traverses the interior of the hollow cam shaft E. The rod carries a pin 64 which works in an inclined slot in the hub of the gearwheel 62. Before reversing, the engine is brought to rest by opening the exhaust valve 37 and cutting off the fuel supply. The exhaust valve is opened by a hand-lever 65 which operates a lever 66 engaging with a collar 68 on the exhaust-valve stem 34. A rod 67 also engages a projection 69 on the fuel-pump regulating-shaft 46 which cuts off the fuel supply. Steam from the float chamber or compressed air from the reservoir H may be used for starting in the reverse direction. Provision is made to operate the fuel pump by hand when starting. The charges in the combustion chambers are ignited by the heat of the surrounding walls, Valves and valve-gear.-The valves 4 &c. are operated by levers 6, 5, and the corresponding valves (not shown) working in conjunction with the combustion chamber B' by levers 7 &c. The levers receive motion from cams 13, 14, 15, 16 through connecting-rods 9, 10, 11, 12, Fig. 1. The cylinder exhaust valve 37, Fig. 4, is operated by a cam 32 which transmits motion through the rod 34 and lever 36. Steam is admitted to the combustion chambers through valves similar to that shown in Fig. 5. The steam valve 74 is held on its seat by the combined action of the steam pressure and a spring 76. It is opened by a lever 40 mounted eccentrically on the operating-lever 5. The time of closing is regulated by adjusting the position of the lever 40 through a link 41 carried by an eccentric mounted on the shaft 80. The position of the eccentric is controlled by a steam-actuated piston (not shown). Relief valves 53, 54 are provided in the combustion chamber. Governing.-A centrifugal governor 43, Fig. 1, is mounted on the gear shaft 44, and operates by controlling the fuel-pump discharge through the medium of the shaft 46, arms 48, Fig. 4, and cams 50 51<1>. The suction stroke of the fuel pump 19 is effected by the cam 21 engaging with a roller on the lever 20, while the return or forcing stroke is made by a spring recessed in the casing 22. The governor acts by moving the cam 50 into the path of the arm 20, thus limiting the forcing stroke of the pump.