Patent GB-1162010-A (GB)
Title: Motor Vehicle Transmissions
Inventor: MARSHALL PETER HENRY
IPC: F16H59/04
Filed: 1966-11-08
Abstract: 1,162,010. Change speed control. FORD MOTOR CO. Ltd. 8 Nov., 1966, No. 49874/66. Heading F2D. A change speed control for a motor vehicle having a main four- or five-speed and reverse gear in series with an auxiliary two-speed axle gear comprises a single control lever 21 movable in a gate 25 to operate switches controlling pneumatically operated cross-shift and ratio establishing servos (13, 14), Fig. 1 (not shown), for the main gear and a ratio establishing electric motor for the auxiliary gear. The control lever 21 is fast with a block 22 axially slidable and rotatable on a fixed shaft 23. Axial cross-shift movement of the block 22 actuates selector bars B1R, B23 respectively closing switches S1R, S23 controlling the cross-shift servo (13) whilst a projection 27 thereon actuates a selector bar BN which closes a switch SN to move the establishing servo (14) to its neutral position. Pivotal establishing movement of the block 22 and lever 21 actuates upper and lower selector bars BLA, BLB, BHA, BHB which close switches SL, SH controlling the auxiliary gear motor and actuates selector bars B2R4A, B2R4B, B135A, B135B which close switches S2R4, S135 which condition the servo (14) to establish the selected ratio. All the switches are microswitches having a central supply terminal which is connected to an upper terminal when the switch is closed and to a lower terminal when the switch is open. The switches S23, SH, S2R4, S135 are respectively supplied from the lower terminals of the switches S1R, SL, SN, S2R4 when the latter are open. Operation.-On movement of the lever 21 to the reverse RL position the block 22 actuates the selector bar B1R to close the switch S1R and energize a solenoid which conditions the servo (13) to crossshift a gear selector lever (12) to the (1-R) plane. The lever 21 actuates selector bars BLA, B2R4A which respectively close switches SL, S2R4 to condition the motor to select low ratio in the auxiliary gear and to condition the servo (14) to establish reverse ratio. For low forward drive the lever 21 is moved to the L1 position. During the crossshift the block 22 actuates the selector bar BN to close the switch SN and neutralize the main gear. In the L1 position the block 22 still actuates the selector bar B1R to retain the lever (12) in the (1-R) plane whilst the lever 21 actuates selector bars BLA, B135A which respectively close the switches SL, S135 for low ratio in the auxiliary gear and to establish first ratio in the main gear. Upshift to second ratio is effected by moving the lever to the H1 position in which it actuates selector bars B135B, BHB. The switches S1R, S135 remain closed to maintain low ratio in the main gear whilst the switch SL is opened and the switch HL closed to upshift the auxiliary gear. Third ratio is obtained by moving the lever 21 to the L2 position. During the cross shift the block 22 actuates the selector bar BN to close the switch SN and neutralize the main gear. The block 22 also releases the selector bar B1R to open switch S1R and actuates the selector bar B23 which closes the switch S23 to condition the servo (13) to bring the lever (12) into the (2-3) plane. In the L2 position the lever 21 actuates selector bars BLA, B2R4A to close switches SL, S2R4 which respectively shift the auxiliary gear to low ratio and establish second ratio in the main gear. Fourth, fifth and sixth ratios are obtained by moving the lever 21 to the H2, L3, H3 positions which effect shifts in the main and auxiliary gears in a similar manner to the above. For seventh to tenth ratios the lever 21 is moved to the positions L4, L5, H4, H5 in which the block 22 ceases to actuate the selector bar B23 and the switch S23 opens to condition the servo (13) to select the (4-5) plane and to energize a relay R45 which connects the lower terminal of the swtich S135 to the neutral selecting line LN so that as soon as the lever 21 is moved out of any of the positions L4 . . . H5 and both the switches S2R4, S135 are open neutral is selected. Selector lever linkage.-The upper end of the lever 21 may be provided with an operating knob or as shown the lever 21 may be operated from a remote control lever 71. The lever 71 is connected by a link 72 to the lower end of the lever 21 the upper end of which moves in the gate 25 to indicate the ratio engaged. The lever 71 pivots at 75 on a rod 73 to effect cross-shift movement of the lever 21 and the lever 71 and rod 73 pivot about an axis 77 aligned with the rod 23 to effect establishing movement of the lever 21. Details.-When a ratio is established the current supply to the circuit is cut and a touchsensitive switch MS in the knob 76 re-establishes the supply when the lever 71 is moved. A holding switch ORS in parallel with the switch MS maintains the supply until ratio shift is completed. The supply to the switches S1R, S23 is through a switch NS which is closed when the main gear is in neutral. Switches PS1, PS2 prevent energization of the solenoids controlling the servo (14) until the appropriate shift plane has been selected by the servo (13). Modifications.-With a four-speed and reverse main gear the L1-H1 shift positions are omitted. The lower terminal of the switch S135 may be permanently connected to the line LN and the selector bar BN and switch SN omitted.