JPS608555A - Speed changing device of automatic speed changer - Google Patents

Abstract

PURPOSE:To prevent the quick advance of a car by prohibiting the transfer from a stop range to a travel range unless an accelerator is fully closed and brake operation conditions are satisfied when the speed change position of an automatic speed changer is at the stop range. CONSTITUTION:An AND circuit 52 is provided outputting a Low signal when signals corresponding to a parking range P or a neutral range N are outputted from a lighting control circuit 12 lighting and controlling LED elements corresponding to individual speed change ranges in a display unit 13 by a lighting control circuit 12. An AND circuit 50 is provided outputting a Low signal when an accelerator switch 44 is off to fully close an accelerator and a parking brake switch 45 or a foot brake switch 46 is turned on to operate the brake. When the outputs of both AND circuits 50, 52 are Low, the output of an OR circuit 51 is made High and guided to the R, D, second speed, first speed input terminals to block a command to the travel range.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a gear shift command to a controller by operating a push-button select switch.
The present invention relates to a transmission device for an automatic transmission in which an electromagnetic means is driven by a control command from the controller to switch a manual valve of the automatic transmission to each shift position.

(Prior Art) As disclosed in, for example, Japanese Utility Model Application Publication No. 57-25237, a transmission device for an automatic transmission having a push-button type select switch has been known.

This conventional automatic transmission transmission device is equipped with an electromagnetic means for switching the manual valve of the automatic transmission to each shift position, and a controller that controls the operation of this electromagnetic gear. When a command is given, the control finger of the controller operates the electromagnetic means to switch the manual valve of the automatic transmission to a shift position corresponding to the shift command.

As described above, in the conventional automatic transmission transmission, the manual/club gear can be switched to each shift position by operating the select switch, but the select switch may mistakenly give the desired shift command. If you operate a switch, for example, when you want to operate the forward drive range when moving from the stop range to the drive range, but you operate the reverse range select switch, the reverse start will suddenly occur. Resulting in.

(Object of the Invention) The present invention has been made in view of the problems of the above-mentioned prior art, and the first object is to provide an automatic transmission that can prevent the vehicle from suddenly starting when switching from the stop range to the drive range. The Company is committed to providing transmissions for aircraft.

(Structure of the Invention) 4. of the present invention. The ν characteristic is that when the shift position of the automatic transmission is in the stop range, the shift from the stop range to the drive range is permitted only when the accelerator is fully open and condition 1 of the brake operation is satisfied. A means for shifting the range is provided, so that unless the accelerator is fully closed and the brake operation conditions are satisfied, the vehicle will not be able to drive from the stop range even if the controller is given a drive range command by operating the select switch. The decision was made to prohibit the use of microwave ovens.

(Example) An example of a transmission device for an automatic transmission according to the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a select switch, 2 is a controller, and the select switch 1 is a pushbutton type, and includes a P range switch, an N range switch, an N range switch, a D range switch, and a 2-speed switch. It has a speed switch and a speed switch. The P range switch has the function of issuing a parking command as a stop range, and the N range switch has a function of issuing a reverse command as a reverse drive range.
The range switch has the function of issuing a neutral command for the stop range, the D range switch has the function of issuing a drive command for the forward range, and the 2nd speed switch has the function of issuing a drive command for the forward range. It has the function of issuing a command to change to 2nd speed, and the L speed switch has the function of issuing a command to change to 1st speed as the forward travel range, and each speed change command from the select switch L is input to the controller 2. It has become something that The controller 2 here includes a logic circuit section 3 and a travel range shift permitting means 4. Control signals such as an ignition signal, an engine rotational speed signal S, and an engine operation detection signal are input to the logic circuit section 3, and the logic circuit section 3
Each input terminal of P, R, N, D, 2nd speed, 1st speed, P, R
It has output terminals for IN, D, 2nd speed, and 1st speed. The logic circuit section 3 has a function of controlling the motor as the electromagnetic means 5 based on the speed change command from the select switch (2). Here, the control command of the logic circuit section 3 is the second
As shown in the figure, it is applied to the motor drive circuit 6. The electromagnetic means 5 has the function of switching the manual valve of the automatic transmission a7 to each transmission position, and in FIG. be. The shift position detecting means 8 here includes a potentiometer lO and a shift position display circuit 11. The potentiometer 10 roughly consists of a resistor 10a and a slider job.
The slider tab is configured to be interlocked with a motor as the electromagnetic means 5. The motor drive circuit 6 is provided with a servo circuit that servo-controls the electromagnetic means 5. This servo circuit is given a reference voltage corresponding to each shift position, and the servo circuit drives and controls the electromagnetic means 5 so that the difference between the detected potential of the potentiometer IO and the reference voltage of the servo circuit becomes small. It is supposed to be done. The shift position display circuit 11 has a function of lighting up to indicate which range the gear shift position is in, and is composed of a lighting display circuit 12 and an indicator 13 as shown in FIG. There is. The lighting control circuit 12 includes a switching transistor drive circuit 14 and a switching transistor group 15, and the switching transistor drive circuit 14 includes a voltage dividing circuit 16, a comparison circuit 17, and a logic circuit 18. The voltage dividing circuit 16 is the comparator circuit 17
The comparator 17a has a function of applying a reference voltage to each of the comparators 17a to 17f, and here, the reference voltage G1 is applied to the positive terminal of the comparator 17a, and the reference voltage G2 is applied to the positive terminal of the comparator 17b. is applied, reference voltage G3 is applied to the positive terminal of comparator 17c, reference voltage G4 is applied to the positive terminal of comparator 17d, reference voltage G5 is applied to the positive terminal of comparator 17e, and the comparison vessel 17f
A reference voltage G6 is applied to the positive terminal of the reference voltage G6, and the voltage decreases from the reference voltage Gl toward the reference voltage G6. The detection potential Gf of the potentiometer 10 is applied to the negative terminals of the comparators 17a-17f. Each comparator 17a-17f outputs a low signal to the logic circuit 18 when the detection potential Gf is higher than the reference voltage, and when the detection potential Gf is lower than the reference voltage, A high signal is output to the logic circuit 18. The logic circuit 18 selectively drives the switching transistors based on the output signal from the comparison circuit 17, and drives the switching transistors based on the output signal from the comparison circuit 17.
24 and NAND circuits 25-29. The switching transistor group 15 also includes switching transistors 30 to 35, and each of the switching transistors 30 to 35 is turned on when a high signal is input as a drive signal from the logic circuit 18.

The display device 13 here includes a plurality of LED elements 36 to 4.
It consists of 1. LED element 36 corresponds to the parking range, LED element 37 corresponds to the reverse range, LED element 38 corresponds to the neutral range, and
The ED element 39 corresponds to the drive range, and the LED element 4
0 corresponds to the 2-speed range, and the LED element 41 corresponds to the 1-speed range, and is energized when each switching transistor group 5 is turned on. The output of the NAND circuit 25 has a detection potential Gf equal to the reference voltage G1. The output of the NAND circuit 26 is high only when the detection potential Gf is between the reference voltages G2 and G3, and the output of the NAND circuit 27 is high only when the detection potential Gf is between the reference voltages G3 and G3. The output of the NAND circuit 29 is high only when the detected potential Gf is between the reference voltages G4 and G5, and the output of the NAND circuit 29 is high only when the detected potential Gf is between the reference voltages G5 and G5. , G6. Therefore, the detection potential Gf is (ヰ;
When the voltage is higher than the voltage Gl, the LED element r36 lights up and the detected potential Gf becomes the reference voltage Gl.

When the detected potential Gf is between reference voltages G2 and G3, the LED element 37 lights up, and when the detected potential Gf is between the reference voltages G2 and G3, the LED element 37 lights up.
The D element 38 lights up and the detected potential Gf becomes the reference voltage G3, G
4, the LED element 39 lights up, and when the detection potential Gf is between the reference voltages G4 and G5, the LEI
The I-element 4o lights up, and the detected potential Gf becomes the reference voltage G5,
When the voltage is between G6, the LED element 41 lights up, and the collector terminals of each of the switching transistors 30 to 35 become low when energized.

The driving range transition permitting means 4 includes, as shown in Figure i1,
The output of the gear shift position detection means 8 and the accelerator are GI'J.
The output of the accelerator fully closed state detecting means 42 which detects whether the state m is in the operating state or not, and the output of the brake operating state detection r first stage 43 which detects whether the brake is in the operating state are inputted. ing.

As shown in FIG. 2, the accelerator fully closed state detection means 42 is composed of an accelerator switch 44.
When the accelerator is depressed and the accelerator is in the fully open state fE, this accelerator switch 44 is in the closed state, and when the accelerator is not depressed and the accelerator is in the fully closed state fE, this accelerator switch 44 is in the open state. It is. The brake v1 movement detection means 43 includes a parking brake switch 45, a foot brake switch 46, a stop indicator lamp 47, an inverter element 48, and an OR circuit 49.
It is composed of. Parking brake switch 4
5 and the foot brake switch 46 are in a closed state when the brake is applied and the brake is activated, and are in an open state when the brake is released and the brake is released. A high signal is output to the AND circuit 50 when either one of the foot brake and the foot brake is in an operating state. The AND circuit 50 is a driving range transition 51.
The output of the OR circuit 49 is input to one input terminal of the AND circuit 50, and the output of the accelerator switch 44 is input to its low input terminal. This AND circuit 50 outputs a high signal to the NOR circuit 51 only when the accelerator is fully closed and the brake is applied. The output of the AND circuit 50 is input to one input terminal of the NOR circuit 51, and the output of the AND circuit 52 is input to its low input terminal. AND circuit 52
This constitutes a part of the shift position detection means 8, and has a function of detecting whether the shift position of the automatic transmission is in the stop range. Here, the AND circuit 52 outputs a low signal when the shift position of the automatic transmission is in either the parking range or the neutral range. The output of the NOR circuit 51 is the OR circuit 5
It is input to the − input terminals of 3 to 56, and its OR circuit 53
~56 low input terminal is R1297 inch, 0179
2-inch, 2-speed range switch, and speed change command are input, and here, the logic circuit section 3 is set to P-1.
When there is low power at each input terminal, a control command Ij is sent to the motor drive circuit 6, and the OR circuit 53
-56 is when the shift position of the automatic transmission is in the stop range.

Means is provided in the conditional travel range command block 1 for conditionally blocking the command to the travel range.

Next, the action will be explained.

(1) When the shift position of the automatic transmission is not in the stop range.

The output of the AND circuit 52 is high because both of its inputs are high, and the output of the NOR circuit 51 is low regardless of whether the output of the AND circuit 50 is high or low. The shift position can be changed between driving ranges by operating the 2nd speed range switch and 1st speed range switch.

(2) When the shift position of the automatic transmission is in one of the parking range and the neutral range (when the output of the AND circuit 52 is low).

(b) When the accelerator is fully closed* and conditions other than condition I for brake operation are satisfied.

Since the output of the AND circuit 52 is low and the output of the AND circuit 50 is low, the output of the NOR circuit 51 becomes high, and the outputs of the OR circuits 53 to 56 become high, resulting in R, D, and 2nd speeds. , Irrespective of whether or not the speed switch is operated, each R and D of the logic circuit section 3
Since the inputs to the , 2nd speed, and 1st speed input terminals become high, commands to the travel range are blocked.

(b) When the accelerator is fully open and the brake operation conditions are satisfied.

The output of the AND circuit 52 is low, but the output of the AND circuit 50 is high, so the NOR circuit 5
The output of 1 becomes low, and R as a driving range switch.
, D, 2nd speed, or L speed range switch, the output of the OR circuit corresponding to that operation becomes low, so a driving range command is input to the logic circuit section 3, and the accelerator is fully closed. The transition from the stop range to the drive range is made only when the brake operation conditions are satisfied.

Although the embodiments have been described above, the present invention is not limited thereto and includes the following.

(1) In the embodiment, when the shift position of the automatic transmission is in the stop range, the driving range command is not input to the logic circuit section except when the accelerator is fully closed and the brake operation conditions are fully open. However, even if the driving range command is input to the logic circuit section, the control command corresponding to the driving range command may not be outputted from the logic circuit section to the electromagnetic means.

(2) In the embodiment, the AND circuit 52 is connected to the shift position display circuit 11, but it can also be connected to the potentiometer 10.

(3) In the embodiment, the controller 2 includes a travel range transition permitting means that allows the transition from the stop range to the travel range. It is also possible to provide a separate driving range transition permitting means.

(Effects of the Invention) As explained below, the present invention provides that when the shift position of the automatic transmission is in the stop range, except when the accelerator is fully closed and the conditions for brake operation are satisfied, Since it is made impossible to shift from the stop range to the drive range, it is possible to prevent the vehicle from suddenly starting even if the select switch is erroneously operated and a drive range command is sent to the controller.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the overall structure of a transmission bag for an automatic transmission according to the present invention. FIG. 2 is a detailed circuit diagram of a transmission device of an automatic transmission detected by the present invention. FIG. 3 is a circuit diagram of a shift position detection means forming a part of the transmission device of the automatic transmission according to the present invention. l... Select switch 2nd controller 4 - φ driving range transition permitting means 5... Electromagnetic means 7... Automatic transmission 8... Shift position detection means 42... Accelerator fully closed state detection means 43 - Brake operation detection means :°C in'7・'

Claims (1)

[Claims] (1) An electromagnetic means for switching a manual valve of an automatic transmission to each shift position, a controller for controlling the operation of the electromagnetic means, a select switch for instructing the controller to change a gear, and detecting the shift position of the automatic transmission. a fully open accelerator state detecting means for detecting whether the accelerator is in a fully closed state; a brake operation detecting means for detecting whether the brake is in an operating state; and the above-mentioned shift position detecting means. , the output of the accelerator fully closed state detection means, and the output of the brake operation detection means, when the shift position of the automatic transmission is in the stop range, the accelerator is fully closed and the brake operation condition is determined. A driving range transition permitting means for allowing a transition from the stop range to the driving range only when the condition is satisfied. A transmission device for an automatic transmission having a