Patent GB-805170-A (GB)
Title: Improvements in or relating to a remote control installation for reversible internal combustion engines
IPC: F01L13/02
Filed: 1957-02-15
Abstract: 805,170. Starting; reversing; stopping. MOTOREN-WERKE MANNHEIM AKTIENGESELLSCHAFT VORM BENZ ABT. STAT. MOTORENBAU. Feb. 15, 1957 [Feb. 17, 1956], No. 5257/57. Class 7(5) In a remote control installation for reversible internal-combustion engines, more especially diesel engines for the propulsion of ships, in which compressed air is used as controlling medium and in which an actuating valve for reversing and starting ahead and an actuating valve for reversing and starting astern are provided on the bridge of the ship, the compressed air coming from the actuating valves causes a turning or displacement of a camshaped member which opens a reversing valve corresponding to the required direction of rotation, the subsequent movement of a cam shaft corresponding to the desired direction of rotation of the engine further changing the position of the cam-shaped member in such manner that it is moved away from the reversing valve into the range of the starting valve and opens the latter. The Figure shows a control installation for the engine of a ship. When the cam shaft 11 is in the position illustrated, i.e. in the position for rotation in the astern direction and the engine is to be reversed for ahead, the ship's officer depresses the actuating valve 57. Compressed air from the pipe 60 acts on the piston 16 and turns the main shaft 1 through 45 degrees in the clockwise direction. The left protuberance 4 of the cam member 2 lifts the valve 23 against the force of the spring 26. Compressed air then passes from the chamber 29 into the chamber 31 and into the oil cylinder 33. The oil contained in the latter is displaced into the chamber to the right of the piston 39 whereby the latter can shift the cam shaft 11 towards the left into the position for the direction of rotation corresponding to ahead. The movement of the cam shaft is transmitted through the parts 7, 8, 9, 10 and 12 to the member 2 which is displaced towards the right on the shaft 1 against the force of the spring 6. As a result the inclined surface 62 lifts the starting valve 25. Compressed air flows into the chamber 37 and from thence to the starting system of the engine whereby the latter is started. Due to the movement of the cam member 2 the left-hand protuberance 4 is moved away from the reversing valve 23 and the latter closes again. During this movement, the right-hand protuberance of the stop cam 3 turns the two-armed lever 42 in a counterclockwise direction and thus sets the control rod 47 of the injection pumps at the position for zero delivery. In the course of the movement of the member 2 towards the right, the left-hand end 63 of the lever 42 after leaving the right protuberance 5 comes into contact with the driving ring 7 whereby the zero delivery position is maintained and then with the base circle of the left-hand protuberance 5 whereby the control rod 47 of the fuel pumps is freed from the influence of the speed governor which sets it at the posttion for supplying fuel. The pawl 13 cannot snap under the right end 64 of the lever 42 since its raised portion 66 has come into contact with the raised portion 65 of the holding cam whereby the pawl 13 is secured in the position shown. If for example, one of the pipes 60, 51 or 54 should develop a leak to such an extent that the actuating cylinder 18 no longer contains sufficient pressure, the operation which has been described above can also be carried out by moving the lever 50 into the position 67. If the engine is to be started from the position illustrated in the astern direction of operation the actuating valve 58 is to be depressed. In this case the shaft 1 is turned in a counterclockwise direction. The reversing valves 23, 24 are not affected by this movement. It is only the starting valve 25 which is opened whereby the engine is started. If the engine is to be stopped the stop valve 56 is - depressed. The piston 45 is operated and the injection pump control rod 47 is moved by the bell-crank lever 44 to the position for zero delivery. The lever 42 is turned in a counterclockwise direction so that the pawl 13 can engage beneath the end 64 under the action of the spring 6. The ring 7 can be so designed that the engine is already receiving a reduced supply of fuel when the starting valve 25 is first opened. For this purpose those parts of the ring 7 which are adjacent the protuberances 5 are made conical. 'The member 2 may be given two rectilinear movements instead of the rotational and axial movements which have been shown. A pipe 51 leads to the shut-off valve '52 which controls the supply of air to a pressure reducing valve 53. The valves 52, 53 can be arranged either on the bridge or in the engine room.