(57) @ A throttle modulation mechanism (10) disposed between a throttle pedal (28) and
a fuel control device (12) varies speed and torque of an unshown engine. Mechanism
is operable during shifting modes of an unshown transmission driven by the engine
to dip and boost fuel delivery to the engine for synchronizing the transmission and/or
reducing shifting shocks. Mechanism (10), which is controlled by a transmission logic
(14), includes first and second levers (16, 20) interconnected for slaved movement
by a torsion spring and fluid actuated cylinders (38, 40) which respectively dip and
boost the throttle in response to logic signals applied to solenoid valves (50, 64).
A transducer (24), mechanically connected to first lever (16), provides an electrical
signal representative of throttle pedal position. Torsion spring (22) includes ends
(22b, 22c) preloaded toward each other and clamping levers (16, 20 or 106) into a
predetermined relationship.
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