Honda NSA700A DN-1 2009, Руководство по обслуживанию

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TECHNICAL FEATURE
OIL MOTOR SIDE SWASH PLATE AND TRANSMISSION RATIO
One of the functions of the oil m otor is to change the transm ission ratio by controlling the tilt angle of the motor side
swash plate, which changes the amount o f the oil supplied to the oil motor. The am ount of the oil supplied to the motor
side swash plate determines the difference of the revolution speed between the pump side swash plate and cylinder. When
the difference between the tw o speeds is at the m aximum, the transm ission is in the lowest ratio. When the speed differ­
ence is at the m inim um , the transm ission is in the highest ratio.
• Low ratio:
When the tilt angle of the m otor side swash plate is
great, large am ount of the oil is required to match the
m otor piston stroke.
To move the pum p piston rapidly, the difference of the
revolution speed between the pump side swash plate
and cylinder (integrated w ith the output shaft) is at the
maximum. Therefore the transmission ratio is lowest
when the tilt angle of the m otor side swash plate is at
the maximum.
• Middle ratio:
As the tilt angle becomes smaller, the amount of oil
required for piston stroke is reduced as well. The dif­
ference of the revolution speeds decreases as the rev­
olution
speed of the output shaft increases
continuously.
• Top ratio:
When the m otor side swash plate is not tilted, the
m otor pistons do not stroke and no oil is reeded.
The revolution speed of the pump side swash plate
and cylinder (output shaft) is the same (transmission
ratio is 1:1, theoretically).
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