JPS6021892B2 - Automobile transmission switching device - Google Patents

Description

[Detailed Description of the Invention] In automobiles that are equipped with a torque converter or centrifugal clutch and do not have a safety mechanism for starting the engine (such as a safety mechanism that prevents the starter from operating unless the transmission is in the neutral position), The engine can be started even when the transmission is in the drive position.

At this time, if you carelessly open the throttle valve and increase the engine speed, the car may start unexpectedly, which is dangerous. The present invention attempts to prevent the above-mentioned danger by automatically switching the transmission to the neutral position when an attempt is made to start the engine with the transmission in the running position. That's right.

In FIG. 1, reference numeral 1 indicates a transmission operating unit, and reference numeral 2 indicates a hand (foot) operation unit. 3 is a fixed part of the transmission operating device, specifically a switching valve cylinder; 4 is a movable part of the transmission operating device, specifically a switching valve piston inserted into the cylinder 3; The rod 4a passes through a hole in the bottom wall of the cylinder 3 and is connected to the lever 5 via a fulcrum (pin) 25 on the outside of the cylinder 3.

15 is a fulcrum of the ladder bar; 16 and 17 are fulcrums for connecting the movable wires 11 and 20 to the bar, respectively;
pass through the insides of the protective tubes 12 and 21, respectively, and are connected to the hand (foot) operation lever 13 at fulcrums 18 and 19.

22 and 23 are wire plackets provided on the fixing member, to which both ends of the protection tubes 12 and 21 are fixed.

14 is the fulcrum of the ladder bar 13.

The operating lever 13 and the switching valve piston 4 in FIG. 1 are in the running position, and at this time the switching valve piston 4 forms a hydraulic circuit to a tarlatch for selecting, for example, a third-purpose gear train in the transmission.

By changing the position of the operating lever 13, the piston 4 can occupy a position corresponding to the first gear or the second gear, and in that case, hydraulic pressure is supplied to the clutch that selects the gear train for the first gear or the second gear. Drum making △ is done. In Figure 2, the operating lever I3
And the piston 4 is in a neutral position, in which case a hydraulic circuit is formed by the piston 4 so that the traveling gear train in the transmission is not selected. An electromagnetic coil 6 is attached to the open end of the cylinder 3, and a movable piece 7 made of a magnetic material is supported in a central hole so as to be movable.

8 is a return switch, and 9 and 10 are limit switches.

The limit switch 9 is closed when it is pressed by the flange 7a of the movable piece 7 as shown in FIG. 1, and when the flange 7a is separated as shown in FIG.
It is closed in FIG. 1 when it is separated, and it is closed in FIG. 2 when it is pushed by the tip of the rod 4a. The movable piece 7 is normally pulled by the spring 8 and supported by the stopper 26, and at this time, the tip reaches the joining surface of the cylinder 3 and the electromagnetic coil 6, and the coil 6
When excited, it is attracted into the cylinder 3, and the piston 4
The length is determined so that it can be moved to the neutral position shown in FIG. That is, the distance S between the end face of the electromagnetic coil 6 and the end face of the flange 7a is equal to the stroke S of the piston 4 within the cylinder 3. In FIG. 3, 51 is a power source, 52 is a main switch, 53 is a starter switch, 54 is a starter electromagnetic switch, and 55 is a starter motor.

When the transmission is in the running position (Fig. 1), when the starter switch 53 (Fig. 3) is pressed, the electromagnetic coil 6 is energized because the limit switch 10 is closed, and the magnetic movable piece 7 moves to the left. move, push the switching valve piston 4, and rotate the lever 5 clockwise about the fulcrum 15. Therefore, the wire 2 is pulled to the right via the fulcrum 17, and the operating lever 13 is also rotated clockwise about the fulcrum 14 via the fulcrum 19, reaching the neutral position shown in FIG. At this time, the limit switch 10 is pushed by the tip of the piston rod 4a and opened, the electromagnetic coil 6 is demagnetized, the movable piece 7 is returned to the right by the elasticity of the return ring 8, and the limit switch 9 is closed. The excitation circuit 50 for the electromagnetic switch 54 is formed, the starter motor 55 rotates, and the engine starts. At this time, the piston 4 of the transmission operating device is in the neutral position, so the transmission is also in the neutral position, and even if the engine rotation is increased, the vehicle will not start and is safe. When the transmission operating device (cylinder 3, piston 4) and operating lever 13 are in the neutral position (in the state shown in Fig. 2, and when the movable piece 7 is in the 7' position), the limit switch 9 is in the movable piece position. Since the limit switch 10 is pressed by the flange 7a and closed, and the limit switch 10 is pressed by the piston rod 4a, the electromagnetic coil 6 is not excited, and when the starter switch 53 is pressed, the starter electromagnetic switch 54 is activated immediately, and the starter motor is activated. 55 rotates and enters the normal starting state.

As explained above, according to the present invention, the engine can be started even when the transmission is in the running position, and since the transmission is automatically returned to the neutral position immediately before the starter motor operates, the engine can be started even when the transmission is in the running position. Even if you inadvertently open the throttle valve and increase the engine speed, there is no danger of the car starting unexpectedly.

The present invention provides a method for closing an engine starter switch when the transmission is in the running position in an automobile having a power transmission device consisting of a combination of a transmission having a neutral position and a running position, and a torque converter or a centrifugal clutch. When
A transmission for an automobile, characterized in that it is provided with an actuator driven by a current flowing through a starter circuit so as to forcibly switch a transmission operating device connected to a hand (foot) operation part of a driver's seat to a neutral position. It is a switching device.

Therefore, the following effects are achieved. Even when the control lever 13 is in the running position, simply turning on the starter switch in that state will energize the electromagnetic coil 6 and bring the piston 6 to the neutral position, so there is no need to perform any operations prior to starting. This can also prevent the risk of the car starting unexpectedly.

Moreover, the piston 4 has wires 11 and 20 connected to the operating lever 13.
Since the levers 13 and 13 are connected to each other, the operating lever 13 can be automatically returned to the neutral position when the transmission is switched to the running position. In particular, the present invention provides a movable piece 7 that moves by the driving force of an actuator, and opens and closes the normally closed starter electromagnetic switch 54 so that the movable piece 7 can open and close the starter electromagnetic switch 54. A limit switch 10 for controlling energization of the actuator is provided in an excitation circuit 50 in parallel with the starter circuit so as to be opened and closed by the movable part 4 of the actuator, and the transmission operating device is in a neutral state. Since the starter circuit is closed only when the condition is present, the following effects are achieved. That is, the limit switches 9 and 10 are opened and closed by directly contacting the rod 4a of the movable part and the flange 7a of the movable piece 7 driven by the electromagnetic coil 6 which is an actuator, and the opening and closing operations of the limit switches 9' and 10 are ensured. become. Furthermore, the limit switches 9 and 10 are connected in parallel to the starter circuit that connects the starting motor 55 and the power supply 51 and in which a large current flows intermittently. does not flow, and there is no risk of burnout of the contacts of the limit switches 9 and 10.

When the engine starter switch is closed with the transmission in the running position, the means (actuator) for forcibly switching the transmission operating device to the neutral position may include the use of magnetic force as shown in the figure. An electric motor or the like may also be used. The operating lever 13 is normally biased toward the neutral position, and a ball spring type detent mechanism is provided to maintain each running position.When the engine starter switch is closed, the elasticity of the detent spring increases. A mechanism for releasing the operating lever 13 by reducing the amount of the operating lever 13 is also conceivable.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram showing an embodiment, FIG. 2 is a drawing showing an operating state, and FIG. 3 is an electrical control circuit diagram. 3, 4... Transmission operating device (switching valve cylinder, switching valve piston), 6... Electromagnetic coil (actuator), 54... Electromagnetic switch for starter, 55... Cell motor. Traditional figure 1 Fin 2 figure Traditional 3 figure

Claims (1)

[Claims] 1. In a motor vehicle equipped with a power transmission device consisting of a combination of a transmission with a neutral position and a running position, and a torque converter or a centrifugal clutch, when the engine starter switch is closed with the transmission in the running position. , an actuator driven by the current flowing through the starter circuit is provided to forcibly switch the transmission operating device connected to the hand (foot) operating part of the driver's seat to the neutral position. A limit switch 9 is provided in the excitation circuit 50 parallel to the starter circuit of the electromagnetic switch 54 so that the actuator can be moved. A limit switch 10 for controlling energization to the actuator is provided in parallel with the starter circuit so as to be opened and closed by the section 4, and the starter circuit is closed only when the transmission operating device is in a neutral state. Characteristic automobile transmission switching device.