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.
|Automatic, infinitely variable mode|
|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.
|Manual shifting mode|
|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.|
|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.|