Engine Torque Transmission - Diagram; And Description - JAWA 210 Service Manual

4. Engine Torque Transmission - Diagram (Fig. 4)

and Description

Gearbox
The diagram of the two-speed automatic trans-
mission is shown in Fig. 4.
The torque is transmitted from the crankshaft
(1) to the gears (2—2') over the starting clutch
(B) by an indented belt.
1st-speed gearing:
It is formed by two pairs of involute spur gears
(3, 4, 5 and 6) meshing with the freewheel (D)
between the gears (4) an(5) on the layshaft. From
the gear (6), the torque is transmitted over a force
closed mechanism to the output shaft (7) and
the rear wheel by means of the secondary trans-
mission chain.
2nd-speed gearing:
Parts (3), (6), and (7) are coupled with the clutch
(C) so that they run at the same speed. The run-
ning of the layshaft gears (4) and (5) at different
speeds is enabled by the freewheel (D). The gear
change is effected by the automatic centrifugal
clutch (C) provided with two shoes of the leading
type. The operation of this clutch is controlled by
force closing between the parts (2'), (6) and (7)
From the output shaft (7), the torque is trans-
mitted to the rear wheel by means of secondary
transmission.
The force-closed clutch engages the respective
gear depending on the road speed, the drive taken
off the automatic transmission, the acceleration
and deceleration, and the rolling resistance of
the vehicle in terrain
The output shaft (7) with the gear-change me-
chanism runs in two ball bearings. The layshaft
is supported by two bronze bushes.
ZVL model 210 Workshop Manual Page 8
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