Patent GB-913232-A (GB)
Title: Operating reversible diesel engines used for propelling ships
IPC: B63H21/22
Filed: 1961-03-08
Abstract: 913,232. Starting; stopping; reversing; regulating. DAIMLER-BENZ A.G. March 8, 1961 [March 11, 1960], No. 8502/61. Classes 7(5) and 7(6) [Also in Group XXIX] Apparatus for controlling the operation of a reversible diesel engine, e.g. propelling a ship, incorporates two operating levers 1, 2, Fig. 1, the former being mounted on a housing 3 attached to the engine whilst the latter is located on a housing 5 remote from the engine; the levers are inter-connected by a flexible transmission 6, e.g. a steel band in a metal tube, and an hydraulic follow-up servomotor device 7. The housing 3, Fig. 5, accommodates a cam drum 89 which activates compressed air starting and reversing valves for each direction of rotation, each reversing valve controlling a changeover valve 13 or 14 Fig. 1, which in turn regulates a main starting valve 16 directing air to the engine cylinders via a conduit 15, the valves 13, 14 being associated with two pneumatically-displaceable camshafts, each having hydraulic damping. The engine speed is adjusted from drum 89, Fig. 5, through a linkage 101 and a lever 20<SP>1</SP> at the hydraulic speed regulator 20, Fig. 1, the latter controlling the rod 18 of the fuel injection pump 19. The regulator pressure is maintained high enough for starting purposes by a pressure transmitter 27 connected to conduit 15. The drum 89, Fig. 5, also controls a stop device 28, Fig. 1, and a pneumatic charge limiting means 29 both coacting with the injection pump rod 18. At a given engine speed the cam drum 89 operates a valve 31 that controls above water and under water exhaust valves 36, 37, via power devices 34, 35, respectively; a relay 41 in this circuit is also connected to the device 29 by a conduit 42 which also leads to the power devices 34, 35. The lever 2, Fig. 2, is fixed to a shaft 46 carrying a gear 47 meshing with a rack 49 joined to the flexible transmission 6, Fig. 1. A notched stopsegment 53 which is located between the lever 2 and the gear 47 co-operates with a double catch 55 which can engage inner notches on the segment 53, the catch 55 being on the lever 2 and releasable upon depressing a button 54 whereby a nose 56 co-operates with external notches on the segment. A worm wheel 57 on the shaft 46 has inner teeth-like indentations 58 also engageable by the catch 55 for setting different engine speeds; the exterior teeth 59 of the wheel 57 coact with a worm 60 via a slipping clutch, not shown, which worm is rotatable by a hand wheel 61 upon releasing a lock 62 to effect a fine adjustment of engine speed through the flexible transmission. The end of the flexible transmission is connected to a valve 75, Fig. 6, in the bore 76 of a piston 78 in a cylinder 77, the valve 75 controlling a bore 80; the piston 78 is attached to a rack 49 engaging a gear 47<SP>1</SP>. Depending upon the direction of movement of the lever 2 the valve 75 either admits pressure oil to or exhaust it from a chamber 85 above the piston 78 whereby the latter moves until it again positions the bore so that it is closed off by the valve 75. The oil exhausts via a groove 86. A shaft 87, Fig. 5, which is connected to gear 47<SP>1</SP> mounts a disc 88, and the drum 89 with cams 90, 91, 92, 93 thereon; the lever 1 is secured to the shaft 87. The lever I is provided with a stop segment 531 and a wormwheel 57<SP>1</SP> similar to that associated with lever 1. Drive pins 95 are provided whereby depending upon the position of a change-over lever 98 the cam drum is driven from the lever 1 or the lever 2 through the gear 47<SP>1</SP>.