device operation is produced in the following form:
was indicated, the connector block rotates solidary with the engine
while the eccentric makes it with the input shaft of the gearbox. When
one of these parts turns to different speed that the other, the
eccentric will slip on the skates of the pistons, pushing to some and
releasing to other successively. Then the pistons are displaced within
the cylinders, some toward within and other outward. This at the same
time provokes the pumping of oil between some cylinders and others. In
this way, the liquid that it is expelled of some cylinders passes
immediately to the others cylinders with less hydraulic pressure (by not
to act on its pistons the eccentric), applying to its pistons against
the eccentric. The hydraulic compensation of the circuit maintains at
all times the skates in touch with the eccentric. The three centrifugal
valves are put between the cylinders, on equal position that these on
within the connector block. They are located on the centre of each
hydraulic channel for control the flow that goes through they.
valve is composed of a valve body, and a spring that pushes it to the
more internal position.
the engine rotates to ralenti speed, the bodies G are maintained in the
position more internal due to the pressure of the springs, and letting
pass all the liquid flow that pump the pistons. In these conditions the
torque transmitted by the connector block on the eccentric is very small,
therefore both parts are decoupled.
the number of revolutions of the engine rises by above of the ralenti,
the valves are expelled progressively outside of the connector block for
the centrifugal force, defeating the opposition that exercise the
springs. Then the valves begin to cover progressively the hydraulic
channels, and reduce the flow until cutting it thoroughly when reach the
position more external. This provokes a fort hydraulic overpressure
within the cylinders that pump, something, which prevents that increase
the slippage speed. Then it starts the gradual coupling between the
eccentric and the connector block that finishes with the eccentric and
the connector block rigidly coupled.
This situation will stay while the speed of both will be superior to the
ralenti. When this speed falls so much that is about to the ralenti, the
bodies of the valves return gradually to the interior position, opening
again the flow of the hydraulic liquid. This provokes the gradual
decoupling between the eccentric and the connector block. Both bodies
remain thoroughly decoupled when the engine speed, and by so much the
connector block speed, falls until the idle.
Antonio Sánchez 1997-2007. Málaga (Spain).