JPH0633253Y2 - Automatic transmission for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic transmission for a vehicle, and more specifically, a gear-type transmission is provided with an actuator and is operated according to a control signal applied from the outside. The present invention relates to an automatic vehicle transmission, which is configured to drive an actuator and position a shift lever of a transmission at a desired shift position.

2. Description of the Related Art A conventional automatic transmission for a vehicle of this type is configured so that a transmission can be positioned at a desired shift position by moving a shift lever in a shift direction or a select direction by a required actuator. Therefore, it is required in control to always know where the position of the shift lever is. Therefore, a position detection switch called a position switch is provided, and the position of the shift lever in the select direction and / or the shift direction can be detected based on the open / closed state of these position switches. Alternatively, as disclosed in Japanese Patent Laid-Open No. 58-180327, a position sensor that outputs an electric signal indicating the position of the gear shift lever is connected to each actuator.

However, the operating range of the gearshift lever and the operating range of the position switch do not completely match, and normally the operating range of the gearshift lever is better than the operating range of the position switch. It has been adjusted to be wider. Therefore,
Since the gear shift lever is positioned at the desired gear shift position, when the gear shift lever is moved by the actuator, the gear shift lever goes out of the operating range of the position switch, and the control device temporarily grasps the gear shift lever position. This often causes an inconvenience that the gear cannot be controlled, and as a result, there is a problem that the shift control cannot be performed stably.

An object of the present invention is to provide an automatic transmission device for a vehicle capable of performing stable gear shift control by preventing the gear shift lever from deviating from the operating range of the position switch during positioning operation of the gear shift lever. To provide.

Means for Solving the Problems A feature of the present invention for solving the above problems is that in a vehicle automatic transmission including a gear type transmission, a transmission lever of the transmission is provided in a required shift passage. To move the shift lever in the shift direction to the desired shift position in the shift passage and the speed change lever in the select passage to move in the select direction. A gear shift unit including a second actuator for positioning the shift lever, and for detecting the shift lever position within a predetermined position detecting operation range in each of the shift and select passages. Position switch, a command signal indicating a desired gear change position, and a detection signal indicating the operation result of the position switch. An arithmetic unit for outputting a drive control signal for driving the first and second actuators required to position the shift lever at a position according to the command signal, the drive control signal and the detection signal In response to the detection unit for detecting the passage through which the shift lever driven by the first or second actuator moves at any given time, and the movement detected by the detection unit in response to the detection unit. A signal for generating an operation control signal necessary for limiting the movement of the shift lever within the operating range in the moving passage by the first or second actuator when the shift lever moves in the passage. An output unit is provided, and the gear shift unit is controlled in response to the drive control signal and the operation control signal.

When the shift lever is moved to the target gear change position along the shift passage and the select passage in response to the action drive control signal, the passage in which the shift lever moves is detected by the detection unit. The signal output unit controls the speed change lever so that when the speed change lever is moved along the moving path, the speed change lever moves within the operation range for the position switch, that is, the detection zone, in the path where the speed change lever moves. It outputs the actuation control signals necessary to limit the movement of the. This operation control signal is given to the first or second actuator. That is, the shift lever is, for example, the first
When positioned by the actuator, the actuation control signal is applied to the second actuator to prevent the shift lever from moving out of the actuating range in the path currently traveled. Therefore, when the shift lever is moved in the shift direction by the first actuator in the shift path, the shift lever does not deviate from the required operating range of the position switch. Similarly, when the shift lever is moved in the select direction by the second actuator, the shift lever is similarly pushed into the predetermined position in the shift direction. As a result, during the position control of the speed change lever, the current position of the speed change lever can always be reliably detected by the position switch, so that the speed change control by the operation of the speed change lever can be stably performed, and reliability,
The safety can be significantly improved.

Embodiment Hereinafter, the present invention will be described in detail with reference to an illustrated embodiment.

FIG. 1 shows an embodiment of an automatic transmission for a vehicle according to the present invention. The automatic vehicle transmission 1 includes a parallel shaft gear type transmission 2 and a gear shift unit 4 configured to perform a gear change operation of the transmission 2 by a pressure fluid supplied from a pressure source 3. .

The shift position of the transmission 2 is, as shown in FIG.
A back position R and the first speed position I to sixth speed position VI, In addition, the neutral position N ₁ to 4 ₄ are determined.

As an actuator for moving the speed change lever 2a of the transmission 2 in the select direction and the shift direction orthogonal thereto, the gear shift unit 4 has a first select operation.
A fluid pressure cylinder 5 and a second fluid pressure cylinder 6 for shift operation are provided. The operating rod 5b and the second rod which are integrally formed with the piston 5a of the first fluid pressure cylinder 5
The operating rod 6b, which is integrally formed with the piston 6a of the fluid pressure cylinder 6, is connected to the speed change lever 2a, and the speed change lever 2a is connected by these fluid pressure cylinders.
Can be positioned at a desired gear shift position.

The pressure fluid is supplied from the pressure source 3 to the chambers 7, 8 and 9 of the first fluid pressure cylinder 5 through the normally closed electromagnetic valves C, D and E, while the chambers of the second fluid pressure cylinder 6 are supplied. A fluid pressure circuit for each fluid pressure cylinder is configured so that the pressure fluid from the pressure source 3 is supplied to the solenoid valves 10 and 11 via the normally closed solenoid valves A and B. The position of the shift lever 2a can be controlled by the opening / closing operation.
That is, in the first fluid pressure cylinder 5, when the solenoid valve D is open and the solenoid valves C and E are closed, the speed change lever 2a is set to the select position, and hereinafter, the solenoid valves C and D are open and the solenoid valve E is closed. When the solenoid valves C and E are open and the solenoid valve D is closed, the select position is selected. When the solenoid valve C is open and the solenoid valves D and E are closed, the select position is selected. (See Figure 2).

On the other hand, in the second fluid pressure cylinder 6, when the solenoid valve A is open and the solenoid valve B is closed, the shift lever 2a is in the shift position, and when both solenoid valves A and B are open, the shift position is in the shift position, and the solenoid valve B is open. When the electromagnetic valve A is closed, the shift position is set.

As can be seen from the above description, the gear shift unit 4 can arbitrarily change the gear of the transmission 2 by selectively opening and closing these solenoid valves A to E.

A control unit 13 is provided to control the change operation by the solenoid valves A to E. The control unit 13 receives a command signal S ₁ indicating a desired gear change position.
Is input from the gear change command signal generator 14, and the first position signal S ₂ indicating the selected position selected by the first fluid pressure cylinder 5 and the shift position shifted by the second fluid pressure cylinder 6 are indicated. The second position signal S ₃ indicates that the select sensor 15 and the shift sensor 16
Have been input respectively.

The select sensor 15 includes four position switches P _{1 to} P ₄ operated by the shift lever.
The position switch P ₁ detects whether or not the shift lever is in the shift direction passage belonging to the neutral position N ₁ , and the operating rod 5b of the first fluid pressure cylinder 5 positions the shift lever at the select position. The gear change unit 4 is provided in the frame so that the gear change unit 4 is turned on in the case of doing so. The other position switches P _{2 to} P ₄ are similarly arranged on the frame in the gear change unit 4 so that the corresponding position switches are turned on when the shift lever is positioned in the select position or in the select position. ing.

The operating ranges of these position switches P _{1 to} P ₄ are shown in FIG. 2 by the widths of SR _{1 to} SR ₄ , respectively, and the operating ranges of the transmission actuators at the selected positions (indicated by solid lines in FIG. 2). It is set to be narrower than the range (shown), and therefore the corresponding position switch is turned on only when the position of the shift lever 2a is within the operating range shown by the dotted line.

On the other hand, the shift sensor 16 has three position switches P _{5 to} P ₇ operated by the shift lever. These position switch P ₅ to P _7, the shift lever is a switch element provided to detect whether the one of the shift position to have the same configuration as the select sensor 15 described above. That is, the position switch P ₅ is turned on when the speed change lever is within a predetermined operating range SC ₁ including the shift position, and the other position switches P ₆ and P ₇ are also operated by the speed change lever SC ₂ within the predetermined operating range SC _{2 respectively.} , it turned on when it entered the SC _3.

The select sensor 15 includes position switches P _{1 to} P _1.
Each on the _4, from the off state, detecting whether the shift lever 2a is in any selected position, and outputs a signal S ₂ indicating the detection result. 'S shift sensor 16, each on the position switch P ₅ to P _7, from the off state, detecting whether the shift lever 2a is in any shift position, and outputs a signal S ₃ indicating the detection result. These signals S ₁ ,
S ₂ and S ₃ are processed in the control unit 13 and control signals S _{a to} S for selectively opening and closing the solenoid valves A to E so that the desired gear change indicated by the command signal S ₁ is performed. S _e is output from the control unit 13. The control signals S _{a to} S _e are supplied to the solenoid valves A to E via the amplifiers 17 to 21 provided correspondingly.
Are supplied to the respective exciting coils 22 to 26.

FIG. 3 shows the configuration of the control unit 13 in a block diagram. A block indicated by reference numeral 30 detects a gear change position at each time by the first position signal S ₂ and the second position signal S _3, and puts the transmission 2 into a desired gear change state indicated by the command signal S ₁ . Is a calculation unit that performs calculation for a series of solenoid valve opening and closing operations necessary for
Control signals T _a and T for performing opening / closing control of E to E, respectively.
_b , T _c , T _d and T _e are output. These control signals T _{a to} T _e are applied to one input of each of OR gates 31 to 35 provided corresponding to the solenoid valves A to E.

When the shift lever 2a is moved in the shift direction or the select direction by either the first fluid pressure cylinder 5 or the second fluid pressure cylinder 6 according to the control signals T _{a to} T _e , the shift passage of the shift lever 2a at that time is moved to the shift passage. In order to keep the speed change lever 2a within the operating range of the position switch so that the speed change lever 2a does not deviate from the operating range of the corresponding position switch, it is necessary to drive the other fluid pressure cylinder 1 A set of control signals U _{a to} U
A signal generator 36 for calculating and outputting _e is provided.

As shown in FIG. 4, the signal generator 36 receives the control signals T _{a to} T _e and the second and third signals S ₂ and S _{3, and} changes from the level state of these input signals at that time. Detection unit 37 for detecting the moving path of the speed change lever 2a
Corresponding to the detection data D ₁ indicating the detection result of the detection unit 37, an electromagnetic valve to be driven for pushing the speed change lever 2 _a into the operating range of the position switch provided corresponding to the movement path. And a selecting unit 38 for selecting. The selection data D ₂ indicating the solenoid valve to be driven is output from the selection unit 38, and the selection data D ₂ is input to the decoder 39 having the output lines a to e corresponding to the solenoid valves A to E. The decoder 39 decodes the content of the selection data D _{2 and} sets only the level of the output line corresponding to the solenoid valve according to the selection data D ₂ to “H”. In this way, the "H" level or "L" level signal is outputted from the output line a to e of the decoder 39 is output as the control signal U _a to U _e, these control signals U _a to U _e, As shown in FIG. 3, the signals are input to the other input terminals of the corresponding OR gates 31 to 35.

Therefore, a from the operation unit 30 is necessary in order to sequentially move the shift lever 2 _a to shift position in accordance with a command signal S ₁ 1
A set of solenoid valve drive signals are output one after another, and these signals are output via the OR gates 31 to 35. On the other hand, in order to hold down the speed change lever 2a within the operating range of the position switch corresponding to the passage through which the speed change lever 2a moves, that is, within the detection zone, the electromagnetic valve to be driven to perform this pressing operation is the selector 38. The decoder 39 outputs _a set of control signals U _{a to} U _e selected in step S1 and required to drive the selected solenoid valve. These control signals U _{a to} U _e are also output via the OR gates 31 to 35 and finally a set of control signals S _{a to} S _e.
Are obtained and applied to the corresponding solenoid valves A to E, respectively.

As a result, when the gear shift lever _2a makes _a required movement along the passage of the transmission actuator, _a predetermined solenoid valve is pushed so that the gear shift lever _2a is pushed into the operating range of the position sensor provided corresponding to the movement passage. The gear shift lever _2a always moves to a predetermined gear shift position through the range of the dotted line in FIG.

Therefore, the calculation in the calculation unit 30 is stably performed, and the control function of the transmission can be significantly improved.

Next, from the second shift position II to the fifth speed position V, the shift lever 2
The above operation will be described more specifically by taking the case of moving a as an example. In this case, it is necessary to first move from the shift position to the arithmetic unit 30.
It is determined by, as a result, the solenoid valve A, B has to be both turned on, the signal T _a, only T _b becomes "H". In the signal generator 36, since only the signals T _a and T _b have become “H”, it is determined in the select signal that the shift lever is to be moved. Therefore, in order to fix the shift lever to the select position, only the signals U _c and U _d are set to the “H” level, and the electrodes C and D are energized by the signals U _c and U _d during this period. Accordingly, the shift lever 2a is moved from the second speed position II through the operating range SR ₂ to the neutral position N _2.

Next, in the calculation unit 30, only the control signal T _c is set to “H” in order to move the speed change lever _{2 a} from the neutral position N ₂ to the neutral position N ₄ . Then, since only the control signal T _c becomes “H”, it is determined in the signal generating unit 36 that there is movement in the select direction at the shift position.
In order to fix the shift position to the shift position, the signal generator 36 _sets only the control signals U _a and U _b to “H”. Consequently, without departing from the working range SC ₂ position switch P _6, the shift lever 2a may be moved to the neutral position N _4.

Finally, the arithmetic unit 30 determines that the shift lever 2a should be moved from the neutral position N ₄ to the fifth speed position V,
As a result, only the control signal T _a becomes “H”. By only a control signal T _a becomes "H" level, the signal generator 36, since the shift lever 2a in the shift direction in the select position is determined to move to secure the shift lever 2a to select position, Only the control signal U _c becomes “H”. As a result, the speed change lever 2 _a can reach the fifth speed position V through the operating range SR ₄ of the position switch P ₄ .

Although an example of the configuration of the control unit 13 has been described with reference to FIGS. 3 and 4, the configuration of the control unit 13 is not limited to this, and a microcomputer may be used to realize the above-described functions. You may comprise.

Effect According to the present invention, as described above, when the shift lever is moved,
An actuator other than the one used to move the gearshift lever is used to limit the movement of the gearshift lever to prevent it from escaping out of the required detection zone in its passage. Can be reliably prevented from deviating from the operating range of the position switch for detecting the position of the gearshift lever, so that gearshift control can be performed stably, and the gearshift lever operates the position switch by adjusting the operating range of each position switch. Compared with preventing deviation from the range, it has excellent effects such as high reliability and no need for adjustment cost.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing shift positions of a transmission shown in FIG. 1, operating ranges of shift levers and operating ranges of position switches, and FIG. FIG. 4 is a block diagram showing the configuration of the control unit shown in FIG. 1, and FIG. 4 is a detailed block diagram showing the configuration of the signal generator shown in FIG. 1 ... The vehicle automatic transmission, 2 ... transmission, 2 a _... shift lever, 4 ... gear shift unit, 5 ... first fluid pressure cylinder, 6: second fluid pressure cylinder, A to E ... solenoid valve, P ₁
To P ₇ ... Position switch.

Claims (1)

[Scope of utility model registration request] 1. An automatic transmission for a vehicle comprising a gear type transmission, wherein a shift lever of the transmission is moved in a required shift passage in a shift direction to a desired shift position in the shift passage. A gear shift unit including a first actuator for positioning and a second actuator for moving the speed change lever in a required select passage in the select direction to position the shift lever at a desired select position in the select passage. A position switch for detecting the shift lever position within a predetermined position detection operating range in the shift and select passages, a command signal indicating a desired gear change position, and the position In response to the detection signal indicating the operation result of the switch, the position of the shift lever is set to the position according to the command signal. An operation unit for outputting a drive control signal for driving the first and second actuators necessary for the purpose of controlling the operation, and being driven by the first or second actuator in response to the drive control signal and the detection signal. A detection unit for detecting a passage that the shift lever moves from time to time; and the shift lever when the shift lever moves in the moving passage detected by the detection unit in response to the detection unit. A signal output unit for generating an operation control signal necessary for limiting the movement of the vehicle by the first or second actuator within the operating range in the moving path, the drive control signal and the operation An automatic transmission for a vehicle, wherein the gear shift unit is controlled in response to a control signal.