JPS5854269A - Variable capacity torque converter - Google Patents

Abstract

PURPOSE:To provide both improvement of fuel consumption and prevention of creep at idling by mounting a movable wing between a pump and a turbine which is maintained in position of cutting off the flow passage by the force of a spring while the pump runs at a low speed and retracted from the flow passage as the pump speed is increased. CONSTITUTION:Movable wings 7 are pivotally supported by struts 8 on a plurality of bosses 6 which are projected on the radial interior part of a core ring 4 of a pump 1 in such a manner that said wings can be turned to come into and out of the clearance between the outlet 1b of the pump 1 and the inlet 2a of a turbine 2. The gravity center G of each movable wing 7 is shifted toward the rear end thereof and a pin 11 which is secured on a connecting ring 10 is slidably engaged with a slot 9 which is formed in the top area thereof so as to restrict the movement of the movable wing 7. As the pump 1 runs at a low speed the movable wings 7 cut off the fluid passage by the action of twisted coiled springs which are loosely fit to the struts 8 and engaged with the pins 11, thereby reducing the torque capacity.

Description

[Detailed description of the invention] According to the present invention, the capacity automatically changes according to the rotation speed of the tank.
Regarding Shi9F Rukupumpata.

Automotive 01lllIWh transmission torque converter Ks
During IP operation, the turbine may be brought to a halt while the pump is maintained at low speed operation (this state is called a stall state). It's a pigeon house where you put the microwave in drive mode and apply the brakes. In order to keep the engine connected to the pump in a certain state, the amount of fuel supplied must be reduced to a certain level. i! It is essential. Also, even though the turbine is stopped, enough power is transmitted to the turbine, so when the brake is released, the car starts moving, which is reminiscent of the so-called creep phenomenon. Furthermore, it also has the disadvantage of large vibrations that occur during idling.

The present invention has been made for the purpose of improving fuel efficiency during the above-mentioned idling operation, as well as preventing creep and reducing vibration.
The movable wing is located between the turbine of the torque converter and the pump, and is rotatably supported by the pump, and a spring force directed outward in the rearward direction is applied to the movable wing, thereby increasing the rotation speed of the pump O11. 4I that the movable lie y/ moves radially inward IK against the spring force to open the space between the turbine and the pump due to the centrifugal force caused by the lift.

Hereinafter, one embodiment of the variable capacitance filter according to the present invention will be described in detail with reference to the drawings.

No. 111 shows a vertical cross-section of the Company-Example O, and FIG. 2 shows the view from O Mumu in FIG. 1.

1 is a pump connected to the engine crankshaft〉, 1a
is the inlet of pump l, and lk is the outlet of pump 10. A turbine 2 is provided to cool the snow 1 from the pump 10, the outlet 1b, and the inlet 1b. ! b This is the 2nd exit of the roaring metal bin. Connect to the ζO turbine y3 whine main shaft. A core ring 4 of the pump 1 extends along the radial outside of the stator 3. Further, 6 is a core ring of the turbine 2.

A plurality of bosses 6 are protruded from the radially inner side 111 of the dovetail puffer 4011P of the pump 1 at equal intervals, and a movable wing 7 is supported by being positioned between the outlet 1 of the pump 1 and the inlet 2a of the turbine 2. There is a pivot point on each boss 6 at a rotation angle of 11:11. The movable wing 7KTh%/% is the tip 7 that goes in and out between the pump outlet 1b and the turbine population 2a and 0.
Since the thickness of the proximal end 7b is thicker than that of the movable wing 1, the center of gravity G of the movable wings 0 is biased toward the proximal end. The movable wing γ is provided with an elongated hole 9 near the tip of the center of gravity G, while a connecting ring 10 is rotatably provided outside the boss 6 along the movable wing 7. The connecting ring 10 is provided with a protruding pin 11 that loosely fits into the long diameter 9. The range of movement of the movable wing 70 is regulated by the engagement between its elongated hole 9 and the bin 11. A pull spring 12 (threaded) is fitted onto the support shaft 8, one end of which is engaged with the bottle 11, and the other end of which is engaged between the surfaces of the core ring 4 of the pump 10. . The tab p1 applies a radially outward spring force to the movable king 7.

In the torque converter having the above structure, when the pump 1 rotates at low speed, the multi-movable wing 7 is moved between the pump outlet 1b and the turbine inlet 2a by the spring force of the baffle 12, as shown by the two-dot chain line in FIG. , the flow path area is reduced, and the capacity is slightly reduced. Therefore, the torque capacity transmitted to the turbine 2 is reduced, and the load on the pump 1 in the stall condition 11 is also reduced, and the reduction in the load on the pump 1 reduces the amount of fuel consumed to maintain the rotation of the engine at a predetermined level. appear. Furthermore, since the torque capacity transmitted to the turbine 2 is small, even if the brake pedal is released in a stalled state, the vehicle will not creep as much as in the conventional case. In addition, to turbine 2
Since this reduces the transmission torque capacity, it is best to completely close the gap between the turbine and the pump to prevent fluid from flowing. When the rotation speed of the pump 10 increases, the centrifugal force acting on the center of gravity G of the movable wing 0 becomes large, and when it overcomes the spring force of the spring 12, the movable wing 7 rotates inward in the radial direction about a support shaft 8, and the flow passage area between the pump 1 and the turbine 2 increases. Movable wing 7 is pump 1
and the turbine 2 is completely opened, and is stopped by the engagement between the elongated body 9 and the bin 11. In FIG. 2, the position indicated by the solid line is the fully open state. Furthermore, if the movable wing 7 opens and closes in an uneven manner, vibrations may occur.
Problems such as damage or a decrease in torque capacity during acceleration may occur. Due to the presence of the I:I kicking ring 10, all the movable wings 7 are regulated in the same way, and the above-mentioned surface failure does not occur.

Further, in this embodiment, the movable wings are arranged in one row, but if the movable wings are arranged in two rows in the axial direction and alternately arranged in the circumferential direction, a larger variable capacity can be obtained.

As mentioned above, according to the variable torque converter according to the present invention, the capacity at low speed rotation can be reduced, so if used in an automatic transmission of a car, the pump will not be activated during low speed idling (stall state). By reducing the flow passage area, torque capacity decreases, improving fuel efficiency during idling, and sufficient flow passages are ensured during high speed rotation, so it is possible to maintain fuel efficiency (no slipping). Become. Furthermore, the transmission torque capacity to the turbine decreases in the stall state], and creep can be prevented.

Vibrations are also reduced.

[Brief explanation of drawings]

111a A vertical sectional view of an embodiment of the responsivity torque converter according to the present invention. In the drawings, 1 is the pump, 2 is the turbine, 3 is the stator, 4 is the core ring of the pump, 6 is the boss, 1 is the movable wing, 8 is the support shaft, is the long body, 10 is the connecting ring, and 11 is the bottle. , 1 Snow is a screw〉; Ill spring. Patent applicant Mitsubishi Motors Corporation Kinsha Fu Agent

Claims (1)

[Claims] The movable wing is located between the torque converter turbine and the pump, and the movable wing is pivotally supported by the pump under the a plate, and at the same time, it gives a half-pole direction external bending force to the rotor pumping ponder. , the movable t-pump is moved in a radial direction against the spring force (by centrifugal force due to an increase in pump rotational speed j10) to open the space between the turbine and the pump. variable capacity torque converter.