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Reduction
ratio control and running modes of Hondamatic
Various
input signals of the throttle opening, vehicle speed, engine
revolutions, motor swash plate angle, gear position, selected
shifting mode, etc. are computer-processed for the control of
reduction ratio. The target engine revolutions determined from
the map is compared to the actual engine revolutions, and depending
on the variance, the direction (to increase or decrease swash
plate angle) and the speed (of changing swash plate angle) of
the control motor are determined. The following modes are provided
for reduction ratio control to allow the user to select one
depending on purpose. |
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Automatic, infinitely variable mode |
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D1 mode (shifting with a priority for power):
The performance-focused mode applicable to all ordinary running
conditions. This mode controls reduction ratio to allow use
of engine revolutions that provide the maximum power when the
throttle is fully opened.
D2 mode (shifting with a priority for torque): This mode
is suitable for running on low traction surfaces such as on
snow or when towing, allowing running with the engine revolutions
kept low. It is easy-to-ride, torque-focused mode. When the
throttle is fully opened, shifting takes place while using
engine revolutions that provide maximum torque.
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Manual shifting mode |
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ESP (electric shift program) mode: This is the
manual shifting in that the rider manually selects one of the
prescribed 5 reduction ratios. By pressing the shift button
located on the left hand lever bracket, the rider can select
a reduction ratio. The swash plate angle is determined by the
shifting up/down operation by the rider. Unlike the conventional
manual shifting including disengagement of the clutch, there
is no shock from shifting. |
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Engine brake |
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When engine brake is required like when coasting
down a slope, the power comes in reversely from the wheel to
the engine. Under such a situation, there occurs a reversal
of function i.e., the power comes in from the motor shaft and
the output occurs from the pump swash plate. Even under such
conditions, this mode permits power transmission in the same
manner as during acceleration, producing engine brake effects
full of “direct” feeling. |
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