Patent GB-809405-A (GB)
Title: Engine starting system
IPC: F02N7/10
Filed: 1957-09-19
Abstract: 809,405. Engine turning gear. CONTINENTAL MOTORS CORPORATION. Sept. 19, 1957 [Sept. 24, 1956], No. 29524/57. Class 7(5) In an internal combustion engine having a crank-shaft provided with a crank-shaft gear and a starter gear drivingly connected to the crank-shaft gear a starter generator system comprises an auxiliary internal combustion starter engine, an electric starter generator and an integral starter transmission comprising means selectively drivingly connecting the starter engine with the starter generator, means selectively drivingly connecting the starter gear simultaneously with the starter engine and the starter generator and means automatically disconnecting the starter engine from the starter generator .and the starter gear when the first engine overruns the starter engine. The invention is particularly for large compression ignition engines. The selective operation of the transmission may be seen by referring to the diagrammatic views of Figs. 3, 4 and 5. Fig. 3 shows a position in which the clutches 66 and 68 are disengaged while the clutch 67 engages the gear portions 62 and 63 of the respective shafts 55 and 28. The heavy line in Fig. 3 indicates the consequent two-way driving connection from the starter engine 16 to the starter generator 19; from the gear 40 splined to the starter engine shaft 17 through gear 54 from the gear portion 62 through the clutch 67 to the gear portion 63 of the clutch shaft 28 which in turn is splined to the transmission drive shaft 26 connected to the starter generator. Thus the starter generator 19 may be utilized for starting the starter engine 16 or the starter engine 16 may drive the starter generator 19. With the starter engine running the clutch 16a may be disengaged releasing an interlock mechanism 78 which is provided to prevent the rod 73 from shifting when the starter engine 16 is engaged with the transmission assembly. The trod 73 may then be shifted to the left carrying the arms 70, 71, 72, to the left for actuating all three clutches 66, 67, 68 to their second position as indicated in Fig. 4. The clutch 16a may then be engaged simultaneously locking the interlock mechanism. In this position the driving connection is from the starter engine 16 through the shaft 17 and the ,gear 40 to the gear 48 thenoe from the gear 49 to the gear 51 from the gear porti:on 60 through clutch 66 to the gear portion 61 then through the overruning clutch 84 to the drive shaft 26. The drive shaft is connected to the starter generator 19 and through the clutch 68 as shown to the crank shaft 12 of the engine 10. After the engine 10 has started the transmission drive shaft overrunning the gear train from the starter engine 16 will disconnect automatically at the overrunning clutch 84, as indicated in Fig. 5, and will operate simply to drive the starter generator 19 as a generator. If the engine 10 is already warm it may be started directly by the starter generator 19 in which case the drive shaft is again disconnected from ,the starter engine gear train which it overruns.. In the clutch position of Fig. 2 the rod 73 is retained by a spring-loaded ball 75 which engages an annular groove 76. When the rod 73 is shifted to the left the ball 75 will engage in a second annular groove.