Patent GB-411848-A (GB)
Title: Engine or power plant mountings for automotive vehicles
IPC: H02P3/14
Filed: 1932-12-07
Abstract: 411,848. Mounting engines &c. TROTT, R. S., 704, Equitable Building, Denver, Colorado, U.S.A. Dec. 7,1932, No. 34735. [Class 79 (iii).] To avoid the transmission of engine torque reactions to the frame or body of a motor vehicle, one end of the engine unit is spring supported directly upon one of the axles independently of the frame mounting whilst the other end is mounted on the frame by means permitting of a universal movement. Several arrangements are described differing mainly in details. In Fig. 1 which is typical, the front end of the engine 1 is secured to a transverse leaf spring 17 connected to the axle 18 through shackles 171 or cushioning pads, the vehicle frame 16 being independently supported by springs 19. The rear end 2 of the unit is supported by roller bearings 6 in a ring 9 trunnioned by pins 10 with rubber bushes in brackets 11 secured to a cross frame member 12. The torque reactions are thus transmitted to the axle, the front end of the engine unit being capable of an orbital movement in a transverse plane. To prevent excessive displacement, the front crank shaft bracket 20 is surrounded, with slight clearance, by a rubber ring 22 in a housing 23 on the front cross frame member 24. In one modification (Fig. 6, not shown) the engine and gearbox are mounted on a sub frame supported at the front end on longitudinal springs arranged between the springs 19. In another form (Fig. 3, not shown) the frame is supported on a transverse spring parallel to the spring 17. These figures also show slightly different constructions of rear universal mountings. Fig. 5 shows a front wheel drive, the spring 17<11> supporting the engine being mounted directly on the axle 18<1>; the rear mounting in this case comprises a rubber ring 48 more or less concentric with the crank shaft axis. In Fig. 13, the engine unit is supported at the front end by a rubber cushion 22 in housings 21<1> and 23 attached to the engine and front frame member 24 respectively whilst the rear end of the unit is supported by members 69 terminating in springs 70 connected to the rear axle through cushioning means 72. Fig. 14 shows a modified arrangement for preventing excessive displacements of the engine : the lengine, which is attached to the transverse spring 17 by means of a bracket with arms 79, carries a lug 73 located in a rubber lined opening 74 in a bracket 23<1> attached to the cross frame member 24, the arms 79 carry cushioning pads 721 and bolts 80 passing through holes in the lower flange of the frame member 24, thus the cushion 74 limits vertical and the pads 72<1> torsional displacements. The gear box may be separate from the engine and mounted on the frame 16 with cushioning supports 72 as shown in Fig. 4 ; in this case the tail end 44 of the engine may be pivoted on a transverse spring 45 with rubber mounting 72 or it may be supported on a rigid cross frame member through the intermediary of a rubber mounting such as shown in Fig. 7 or Fig. 9. The cushioning supports employed in other positions as at 72 in Figs. 4 13 and 14 may also be of the construction shown in Fig. 7 or Fig. 9. In Fig. 16 a support for the engine unit in a cross frame member 77 is shown comprising a spring 75 in conjunction with cushioning means 72. The clutch, brake and other controls may be on the frame with flexible &c. connections as in Fig. 8 (not shown) to the transmission units. Frictional, hydraulic or other forms of damping means may be provided between the engine unit and the frame.