JPH0735145Y2 - Emergency transmission emergency switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an emergency switch attached to a mechanical automatic transmission that automates starting, transmitting, and shifting of a vehicle.
In particular, the present invention relates to an emergency switch of an automatic transmission capable of moving a vehicle forward and backward by switching a manual multi-stage switching switch for gear train switching and a toggle switch for clutch disengagement.

(Prior Art) In a mechanical automatic transmission, a clutch-type clutch actuator is used for engagement / disengagement of a clutch, and a gear train in a transmission is switched to an arbitrary gear stage by a gear shift unit. The automatic shift controller controls each of the actuator and the gear shift unit. One example of such a device is Japanese Patent Application No. 59-5074.
The technology is disclosed in the specification and drawings of No. 7.

However, if an abnormality occurs in the controller of this type of device, it becomes difficult to move the vehicle to the evacuation site thereafter. In order to deal with this, a vehicle equipped with an emergency switch capable of moving the vehicle forward and backward at a specific gear for emergency has been proposed.

This emergency switch is branched and connected to an opening / closing circuit of each solenoid valve connecting between the clutch actuator and the gear shift unit and the automatic transmission controller, and each solenoid valve can be driven at any time.

By the way, the switch board 27 of the emergency switch is constructed as shown in FIG. Here, the switch board 27 is provided with a rotary switch 60 and a toggle switch 61 as a manual multistage changeover switch. Further, the rotary switch 60 is capable of shifting to the second speed and the reverse speed as an emergency traveling stage.
Alternatively, 63 is turned on, the gear is disengaged at the second position, the second speed or the reverse gear select position is secured at the third position, the shift is completed at the fourth position, and the clutch is held immediately before the half clutch at the fifth position. After that, by turning on the toggle switch 61, the clutch is operated in the contact direction, and by turning it off, the clutch is operated in the disengagement direction and the vehicle is moved forward and backward.

By the way, the clutch actuator used here is the third
Air from the air source is supplied to the pressure chamber 53 of the cylinder 52 via the air supply on-off valve 4 on the air supply pipe 51 as shown in the figure.

Here, two solenoid valves 4 and 5 for clutch disengagement are connected in parallel on the air supply pipe 51, and two solenoid valves for clutch engagement that open the pressure chamber 53 to the atmosphere are connected to the air supply pipe 51. 6,
7 is connected. The air supply on-off valve 50 is always opened when the clutch is operated to enable the air supply.

(Problems to be solved by the invention) As described above, the conventional emergency switch has two control circuits for the clutch actuator and the gear shift unit.
As a system, the emergency electric circuit could operate when the main electric circuit failed.

However, in such a conventional device, when the clutch disengagement solenoid valves 4 and 5 on the clutch actuator are short-circuited, they continue to open, and if such a situation occurs, even when the clutch engagement process is performed, the clutch engagement solenoid valve 6, Even if 7 is turned on, the air from the air supply on-off valve 15 continues to be supplied to the pressure chamber 53, the release lever 58 on the clutch side does not move from the disengaged position to the contact position, and the vehicle is in an emergency state due to defective clutch engagement processing. There is a possibility that you may not be able to escape more, which is a problem.

It is an object of the present invention to provide an emergency switch for an automatic transmission that enables emergency travel by driving at least a hydraulic gear shift unit by an electromagnetic valve dedicated to an emergency in an emergency.

It is an object of the present invention to provide an emergency switch for an automatic transmission which is improved so that clutch engagement processing can be reliably performed in an emergency.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention selectively operates a clutch actuator by switching the air source side air between an air supply on-off valve and a solenoid valve for connecting and disconnecting the clutch. Is supplied to and discharged from the clutch to switch the clutch, the gear train of the transmission is switched by the gear shift unit, and the automatic transmission is attached to the automatic transmission that controls the switching of the clutch actuator and the gear shift unit by the automatic shift controller, and Instead of the automatic transmission controller, a solenoid switch for connecting and disconnecting the clutch actuator is operated by a toggle switch and a gear shift unit is switched by a manual multi-stage switch, especially when the clutch connection circuit of the toggle switch is turned on. Characterized in that it is configured to turn off the air supply on-off valve only And

(Operation) When the toggle switch is switched to the clutch connection, the clutch connection circuit turns off the air supply on-off valve, so the air supply to the clutch actuator is cut off and the clutch actuator completes the clutch disengagement operation in the air supply direction. Will be blocked by.

(Embodiment) The emergency switch 1 of the automatic transmission shown in FIG. 1 is mounted on a vehicle having an engine with an injection pump (not shown) and a power transmission system including a clutch and a transmission (not shown). Here, the automatic transmission is for starting the vehicle,
The vehicle can be started and shifted automatically, and when required, the vehicle can be started and run in accordance with a predetermined aging pattern by a manual switch-switching operation of the emergency switch 1. Since the clutch actuator 8, its air supply system, and the switch board 27 used in this device are the same as those shown in FIGS. 3 and 4, the same members are designated by the same reference numerals and their duplicate description will be omitted. .

Here, the automatic transmission has an accelerator sensor 2 that outputs an opening signal of an accelerator pedal (not shown), an electronic governor controller 3 that controls an electronic governor (not shown) directly connected to the injection pump, and a clutch engagement / disengagement operation 4 Two solenoid valves 4,5,
A well-known clutch actuator 8 of the air piston type including 6, 7 and a gear train in the transmission are pressed in the select system X (see FIG. 2) and the shift direction Y so as to be arranged at an arbitrary shift stage, and Air piston type well-known gear shift unit 14 provided with two solenoid valves 9, 10, 11, 12, 13 and an air supply pipe 51 (see FIG. 3) attached to the clutch actuator 8 and the gear shift unit 14 Opening / closing valve 15, automatic shift controller 16 for controlling the electronic governor controller 3, clutch actuator 8 and gear shift unit 14 based on the accelerator opening signal, engine rotation signal, etc. And an emergency switch 1 for enabling the above. Reference numeral 64 indicates a power supply circuit.

The gears in the transmission of this vehicle move forward 5 as shown in FIG.
It is possible to achieve a shift speed according to a shift pattern of one speed and one reverse speed.

The automatic shift controller 16 is a control circuit 16 including a microcomputer and a drive circuit for each actuator.
1 and four relay switches 19, 20, 21, 22 connected to the power supply 18 via the starter switch 17.

In addition to the accelerator opening signal and the engine rotation signal, the main control circuit 161 uses the automatic shift command and the manual shift command from the shift switch as a shift command unit (not shown) based on the manual shift command and the map in advance. The optimum shift stage is selected based on the processed shift stage data, each process of starting, starting, and shifting is performed, and the vehicle is controlled to run under appropriate conditions.

The first relay switch 19 includes a switching contact piece 191 for switching the clutch actuator 8 to the power source 18 side during normal operation and to the starter switch 17 side during excitation. The second relay switch 20 is provided with a series of five switching contact rows 201 for connecting and disconnecting the open / close circuits 25 of the five solenoid valves 9, 10, 11, 12, 13. The third relay switch 21 is a series of six switching contact rows for simultaneously connecting and disconnecting the switching circuits 23 of the four solenoid valves 4,5,6,7, the power supply circuit 24 of the gear shift unit 14 and the switching circuit 55 of the air supply switching valve 15. 211 is provided. The fourth relay switch 22 outputs an accelerator opening signal to the control circuit 301 in the electronic governor controller 3 via the control circuit 161 during normal operation, and a switching contact that switches to output the same signal directly to the control circuit 301 during excitation. The unit 221 is provided.

As shown in FIG. 3, the first of the clutch actuator 8
To the fourth solenoid valve (MVX1, MVX2, MVY1, MVY2) 4,5, 6, 7 are normally closed valves, and these are appropriately combined to perform clutch engagement, clutch disengagement, clutch slow engagement and clutch slow disengagement. Can be achieved.

Next, when the first to fifth solenoid valves (MVA, MVB, MVC, MVD, MVE) 9, 10, 11, 12, 13 in the gear shift unit 14 are all turned off, the air cylinder side in the gear shift unit is exposed to the atmosphere. High pressure air can be supplied to these air cylinders when they are opened and turned on. These are appropriately combined, and the gear train is arranged in a switching manner such that the gear train has five forward gears and one reverse gear.

The emergency switch 1, which is connected to the power supply 18 through the starter switch 17 together with the automatic transmission controller 16,
An emergency switch panel 27, which is mounted near the driver's seat (not shown), is provided, and there is a switch 1 similar to that shown in FIG.
A rotary switch 60 capable of selectively securing 5 positions as positions for switching to the speed and reverse R, a toggle switch 61 for switching between intermittent 2 positions, and an LED 62 or LED 63 lit at the 1st speed and the reverse gear position.

Here, the emergency switch 1 is provided with a changeover switch circuit 26 that can be changed over by the rotary switch 60, and the changeover switch circuit 26 is switched to 4 by the operation of the switch 2.
One relay switch 19,20,21,22 and four solenoid valves 9,10,
11, 12 and the air supply on-off valve (MVW) 15 and the two terminals 31, 32 on the clutch actuating circuit 57 side are selectively switchable.

A clutch disengagement timer 33, in which the time required to disengage the clutch is set, is connected to the terminal 32, and the output of the clutch disengagement timer 33 drives the clutch disengagement solenoid valves 4 and 5 via the OR circuit 34. Connected to the switch transistors 35 and 36.

A clutch contact timer that sets the time required to move the clutch from the disengaged position to the position immediately before the half-clutch at terminal 32
37 is connected through a NOR circuit 38, and its output is an OR circuit.
It is connected via 39 to switch transistors 40 and 41 which drive the solenoid valves 7 and 8 for clutch engagement.

The toggle switch 61 has its disconnection terminal 301 connected to the NOR circuit 42 as a clutch disconnection circuit and the clutch disconnection duty circuit 43 via this circuit, and its connection terminal 302 via the NOR circuit 44 as a clutch connection circuit and this circuit. Is connected to the clutch contact duty circuit 45. Where disconnection
A switching circuit 55 for the air supply on-off valve 15 is connected to the 301 via a clutch disengagement air supply circuit 56 with a diode.

Further, the other terminals of the NOR circuits 42 and 44 are connected to the terminal 32. The clutch disengagement duty circuit 43 is set with a duty ratio for stepwise disengagement of the clutch, and the clutch engagement duty circuit 45 is set with a duty ratio for stepwise disengagement of the clutch. Reference numeral 46 is a timer that regulates the continuous output time of the duty output, and is connected to both NOR circuits via an OR circuit 47, and its output is connected to AND circuits 48, 49.
Can be output respectively. The AND circuit 48 is connected to the clutch disconnection duty circuit 43 and the duty timer 46. The AND circuit 49 is connected to the clutch contact duty circuit 45 and the duty timer 46, and the respective outputs are OR circuits 34, 3
It is output to 9.

The automatic transmission having such a configuration starts driving when the starter switch 17 is turned on, and the clutch actuator and the gear shift unit are driven by the operation of the control circuit 161, so that the vehicle starts, starts and shifts.

Next, when traveling by the automatic transmission controller 16 becomes impossible, the rotary switch 60 and the toggle switch 61 in the emergency switch 1 are switched.

When the rotary switch 60 is switched to the forward side, the changeover switch circuit 26 is switched.

1. By operating the switching stage 1, as a pre-process, the clutch actuator 8 and the gear shift unit 14 are opened under the control of the main control circuit 161, and the control is switched to the emergency switch 1 and set by the clutch disengagement timer 33. T1 second clutch disconnection signal (MV
X1, MVX2) Turn on 4,5.

2. By operating the switching stage 2, the gear train is held in neutral (gear disengagement) neutral signal output (MVA, B on).

3. By operating the switching stage 3, the gear train outputs the select signal to M2 (MVA, B, C, E) 9, 10, 11, 13 on.

4. The gear shift signal output (MVB, C, E) 10, 11, 13 to the 1st gear is turned on by operating the switching gear 4.

5. By operating the switching stage 5, the clutch engagement signal output for T5 seconds set by the clutch engagement timer 37 (MVY1, Y2 on)
Hold the position just before the half-clutch.

During this process, the LED 62 lights up, and then waits for clutch process by operating the toggle switch 61.

Next, when the signal that the gear shift switch 28 has been switched from the neutral to the reverse stage is received, the gear is disengaged by the same processing as the above-mentioned 1.2.3.

4. By operating switching stage 4, gear shift signal output (MVB, C) 10, 11 to R stage is turned on.

5. By operating the switching stage 5, the clutch engagement signal output for T5 seconds set by the clutch engagement timer 37 (MVY1, Y2 on)
Hold the position just before the half-clutch.

During this process, the LED 63 lights up and then waits for clutch process by operating the toggle switch 61.

Next, when the gear train is switched to the first gear or the R gear and the clutch reaches the position immediately before the half-clutch, the toggle switch 61 starts the clutch connecting / disconnecting process.

Here, it is assumed that the toggle switch 61 is switched to the contact 302.

In this case, the NOR circuit 44 and the OR circuit 47 are turned on, the clutch connection duty circuit 45 and the duty timer 46 are turned on, the AND circuit 49 and the OR circuit 39 are both turned on, and the solenoid valves MVY1 and MVY2 for clutch connection are driven. Then, the clutch is joined to the clutch for removal, whereby the vehicle can be moved. At this time, even if one of the solenoid valves MVX1 and MVX2 for clutch disengagement is short-circuited, the on-off valve 15 for air supply is turned off at this time, air supply is cut off, and the clutch is disengaged. Movement in any direction is completely blocked, ensuring movement of the vehicle.

On the other hand, the toggle switch 61 disconnects the contact 30 to stop the vehicle.
It is assumed that it has been switched to 1.

In this case, the NOR circuit 42 and the OR circuit 47 are turned on, the clutch disconnection duty circuit 43 and the duty timer 46 are turned on, the AND circuit 48 and the OR circuit 34 are both turned on, and the clutch disconnection solenoid valves MVX1 and MVX2 are driven. Then, the clutch is disengaged and actuated to prevent engine stalling when the vehicle is stopped.

(Effect of the Invention) As described above, according to the present invention, the clutch disconnection air supply circuit opens the air supply on / off valve only when the toggle switch is switched to the clutch disengagement, and the air supply on / off valve is opened when the clutch is switched to the clutch connection. Since it is closed and the air supply to the clutch actuator is cut off, even if the solenoid valve for clutch disconnection on the air supply side is short-circuited, the clutch disengagement operation can be completely blocked, and the clutch connection process can be performed reliably in an emergency. The vehicle can escape from an emergency.

[Brief description of drawings]

FIG. 1 is a schematic connection diagram of an emergency switch of an automatic transmission according to an embodiment of the present invention, FIG. 2 is a shift pattern diagram of a vehicle equipped with the same switch, and FIG. 3 is an automatic system equipped with a conventional emergency switch. FIG. 4 is a front view of an emergency switch board used by a conventional emergency switch, and FIG. 4 is a clutch actuator used by the transmission and its air supply pipe system diagram. 1 ... Emergency switch, 60 ... Rotary switch, 61 ... Toggle switch, 8 ... Clutch actuator, 14 ... Gear shift unit, 15 ... Air supply opening / closing valve, 161 ... Automatic transmission control circuit, 2
8 …… Gear shift switch, 26 …… Changeover switch circuit, 4
2,44 …… Noah circuit, 43 …… Clutch disengagement duty circuit, 45 …… Clutch contact duty circuit, 56 …… Clutch disengagement air supply circuit, 57 …… Clutch operation circuit.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F16H 63:40

Claims (1)

[Scope of utility model registration request] 1. A gear train of a transmission, wherein air on the air source side is selectively supplied to and discharged from a clutch actuator by switching between an air supply on-off valve and a solenoid valve for connecting and disconnecting the clutch. Of the clutch actuator and the gear shift unit are attached to an automatic transmission that controls the switching of each of the clutch actuator and the gear shift unit by an automatic transmission controller, and instead of the automatic transmission controller, the clutch actuator is connected and disconnected. In an emergency switch of an automatic transmission in which the solenoid valve is switched by a toggle switch and the gear shift unit is switched by a manual multistage switch, the air supply on-off valve is turned off only when the clutch connection circuit of the toggle switch is on. Automatic transmission characterized by Emergency switch.