GB1007193A - Driving system for a plurality of rotary piston internal combustion engines - Google Patents

Abstract

1,007,193. Rotary-piston internal combustion engines. NSU MOTORWERKE A.G. April 22, 1963 [April 21, 1962], No. 15748/63. Heading F1F. [Also in Division B7] A drive system for at least two rotary-piston I.C. engines whose output shafts are coupled together to drive a single load and whose intake passages are supplied from a common manifold equipped with a throttle valve, comprises in the case of three engines M 1 , M 2 , M 3 , Fig. 3, having output shafts 1, 2, 8 respectively, a 2:1 reduction gearing Z 4 , Z 3 and a free wheel F 2 between the shafts 8, 1 and a 2:1 reduction gearing Z 2 , Z 1 and a freewheel F 1 between the shafts 1, 2. The freewheel F 2 disengages the engine M 3 and the freewheel F 1 the engines M 3 , M 1 . A belt drive from the output shaft 2 which is connected to the load to be driven is connected to a speed governor R which controls throttle valves K 1 , K 2 , K 3 in the intake lines 5, 6 and 9 respectively to the engines M 1 , M 2 , M 3 and a further throttle valve K 3 <SP>1</SP> in the line 5. In the rest position of the engines, the valves K 3 , K 3 <SP>1</SP> are open and the valves K 1 , K 2 closed. To start the engine after the operation of the main throttle valve HK from the "gas" pedal of a motor vehicle, the engine M 3 is started by a starter St. This engine drives the output shaft 2 through the engines M 1 , M 2 which are both idling since the valves K 1 , K 2 are closed and remain closed up to a speed of 500 R.P.M. of the output shaft (2000 R.P.M. of the engine M3). At this speed the governor R opens the valve K 1 to bring in the engine M 1 which is rotating at 1000 R.P.M. to add its output to the shaft 2. On the output shaft speed reaching 1000 R.P.M. (M 1 speed 2000 R.P.M. and M 3 speed 4000 R.P.M.), the throttle valve K 2 is opened to bring in the engine M 2 . On a further rise in speed of the output shaft to 1500 R.P.M., the speed of the engine M 3 rises to 6000 R.P.M. its maximum permissible, at which the speed the valve K 3 is closed by the governor R to cut out this engine. At an output shaft speed of 3000 R.P.M., the speed of the engine M 1 reaches its maximum permissible 6000 R.P.M., whence the valve K 3 <SP>1</SP> is closed to cut out this engine; In the event of the output speed diminishing, the valves are operated to first bring in the engine M 1 at 1500 R.P.M. and then the engine M 3 at 1000 R.P.M. The invention is also described to control two engines, i.e., with the engine M 3 entirely omitted. The starter St then being mounted on the engine M 1 and the gearing Z 3 , Z 4 , the freewheel F 2 , output shaft 8, line 9 and throttle valves K 3 , K 3 <SP>1</SP> omitted.