Patent GB-801377-A (GB)
Title: Improvements relating to engine and reversing gear control mechanism
IPC: B63H21/22
Filed: 1956-06-19
Abstract: 801,377. Controlling change-speed gearing. DAIMLER-BENZ A.G. June 19, 1956 [June 20, 1955], No. 18970/56. Class 80 (2). [Also in Group XXVII] An engine and gear control for a boat equipped with a diesel engine wherein settings for the engine fuel supply and control of the forward and reverse running gear as necessary for starting warm running travelling and stopping are adjusted by means of a hand lever articulated eccentrically on a so-called mushroom part and which hand lever is movable in a plurality of planes is characterized in that the hand lever is on the one hand connected to a linkage comprising a rod passed centrally through the mushroom part and connected with a toggle lever, mounted on the mushroom part, the toggle lever actuating a disc which is rotatable on the mushroom part for the adjustment of the fuel regulator of the injection pump, the hand lever on the other hand being in operative relation with a coupling pin slidably mounted in the mushroom part in such manner that when the hand lever is in a perpendicular position the mushroom part is coupled to an adjusting disc which, on the rotation on the hand lever, rotates a cam disc provided with a lug for operating a gear shift lock which is operative for setting the gear from neutral into either the forward or reverse running position, the cam being operative, after the gear-shift, for locking the gear in the given setting. When the diesel engine is to be started, it is desirable to adjust the regulator of the fuelinjection pump to a full throttle setting whilst the gears remain in neutral. For this purpose the hand lever 17 is first turned about the said transverse axis and on the pivot 15, in the direction of the arrow 17<SP>1</SP> in Fig. 1 and into the position 45 indicated by chain line in Fig. 1 and by a broken line circle in Fig. 5. This swinging of the lever 17 removes the face of its rectangular section part from the end of the coupling pin 31 which is thereupon pressed leftwardly by the spring-actuated pin 32. The result is that the coupling pin 31 leaves its hole in the disc 5 and breaks the coupling between the latter and the head of the mushroom part 9. It will be noted that the right-hand end of the coupling pin 31 leaves its hole in the disc 5 after a very short travel, and is then found in an annular groove 5a in the disc 5. On the other hand, the projecting end of the spring-actuated pin 32, which formerly was engaged only in the fixed disc 3, now also engages in the hole in the disc 5 formerly occupied by the pin 31 so that the disc 5, its shaft 8 and the cam disc 7, are now coupled with the fixed disc 3 and thus locked against turning. The hand lever 17, inclined a few degrees away from its perpendicular position, and by reason of its pivot connection 20 with the rod 21, has drawn the latter outwardly and through the link 22 has slightly broken the toggle 24, 25 so that the disc 13 is turned slightly counter-clockwise and through the ball joint 14 and the linkage connected therewith has a negligible effect upon the adjustment of the injection pump regulator. By now turning the inclined hand lever 17 around the longitudinal axis (that is to say in a plane perpendicular to the plane of the section in Fig. 1) and into a position beyond that indicated by the chain line in Fig. 3, the injection pump regulator can be adjusted to a full throttle setting. This turning of the hand lever 17 is imparted to the head 9 and its stem and so to the housing 11 which carries with it the disc 13. Thus, the ball joint 14 on the disc 13 is moved circularly from a normal lower position to an upper position and thereby effects the desired adjustment of the injection pump regulator. The gears remain in neutral, of course, as the locking pin 32 prevents any turning of the cam disc 7 in the manner above described. During this turning of the hand lever 17 the right-hand end of the coupling pin 31 will move freely and idly in the groove 5a. On starting diesel engines it is customary to inject a generous amount of fuel during the starting period. Thus, the engine may now be started, by operating the switch 44, with a full throttle setting but when it has picked up speed and is sufficiently warm, the hand lever 17 may be turned reversely about the longitudinal axis to an intermediate position, as for example the chain line position in Fig. 3, corresponding with a speed of revolution suitable for a hot running engine. The starting having been accomplished, the hand lever 17 still inclined from the vertical plane, may now be turned about the longitudinal axis back to the mid-position in which it is seen in Fig. 3 and in which a setting for idle runnirig is obtained. The hand lever 17 may then be turned about the transverse axis 15 from the inclined position 45 in Fig. 1 back to the full-line position illustrated, thereby restoring the coupling pin 31 to its original position in which it couples the head 9 with the disc 5, hollow shaft 8 and cam disc 7, the idle-running setting being maintained. If forward propulsion of the boat is now desired, the hand lever 17 is turned about the said longitudinal axis and turns the mushroom part 9 and therewith the disc 5 which is coupled to it by the pin 31. The disc 5 similarly turns the hollow shaft 8 and the cam disc 7 mounted on the latter, so that the pin 38 acting in the slot 39 rocks the plate 34 in the direction for engaging the forward gear, the cam truck then coming into engagement with the arcuate edge 42 for locking the parts in this forward gear-engaged setting whilst the hand lever 17 is further turned into or beyond the position indicated by chain line in Fig. 3, thereby accelerating the engine up to its appropriate working speed under load. When turning the hand lever 17 about the said longitudinal axis, the clicking of the spring ball catch 30 in appropriate notches will be felt by the operator to warn him that a given setting has been reached. In like manner he will be warned by the clicking of the spring ball catches 18 in notches such as 46, Fig. 4 (not shown), when turning the hand lever 17 about the said transverse axis. The reverse operation of the parts from the neutral position illustrated, for the purpose of engaging the reverse gear, is similar in all respects to the foregoing and will be readily understood without further description. For the purpose of stopping the engine, the hand lever 17 is first brought into the neutral position illustrated in which the gear is disengaged and the engine is idling. The hand lever is then rocked about the said transverse axis into the extreme position 47, and the rod 21 through the toggle 24, 25 causes the disc 13 to be turned into a stop position in which the ball joint 14 moves farther downward out of the idling position into a shut-off position 48, so that the quantity regulator member on the injection pump of the diesel engine is moved to a stop position in which fuel injection is cut off.