JPH0297732A - Learning device of amount of engagement for clutch control device - Google Patents

Abstract

PURPOSE:To improve the operational efficiency by providing a travelling control means for stopping control for travelling until an operating means for indicating completion of the preparation of a standard amount of operation is operated after the preparation of the standard amount of operation is completed by a standard amount of operation-preparing means. CONSTITUTION:When data of a standard amount of operation stored in RAM23 is eliminated by replacing batteries, etc., CPU21 automatically performs learning- treating operation for newly calculating the standard amount of operation of a clutch 2. When a new standard amount of operation is determined, CPU21 waits for movement to an usual control mode until switching operation of an ignition switch 30 is confirmed. Further, CPU21 allows a check lamp 25 provided in a driver's cab to go on and off at high speed during forced learning- treating operation, and indicates that the forced learning is continued. Mode- conversion of a controller is easily confirmed, and usual cargo handling and travelling operations are thus rapidly started.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connection amount learning device for a clutch control device.

[Prior Art] In a vehicle equipped with an automatic transmission and a dry clutch, each time a gear change of the automatic transmission is performed, the clutch automatically performs a shifting operation at a predetermined timing before and after the gear change. Furthermore, in industrial vehicles equipped with an inching pedal, the clutch is automatically disengaged based on the operation of the inching pedal. A hydraulic cylinder is used as a driving means for reciprocating the clutch between a fully engaged position (completely engaged position) and a completely disengaged position (completely disengaged position). By the way, the clutch plate of the clutch wears out every time it is cut off, so even if the stroke amount of the piston rod of the hydraulic cylinder remains the same, the connection state will gradually change. It becomes impossible to control the situation. Therefore, in the past, the stroke amount of the piston rod with respect to a certain engagement state of the clutch that was preset during driving (for example, near the clutch engagement start point, that is, the engagement state where the input shaft of the automatic transmission starts rotating due to the engine output) (
(normal learning mode), the piston rod of the hydraulic cylinder is operated based on the updated learning point, and the clutch is controlled to a predetermined connected state.

The learning point data is stored and updated in the storage means.

Also, the learning data stored in the storage means is not erased even if the key switch is turned off by the backup power source, but the learning data will be erased if, for example, the battery that serves as the backup power source is replaced. Ru. If the learning data is erased in this way, it is determined that there is no learning data in the storage means, and the task of forcibly operating the piston rod of the hydraulic cylinder to find the learning point before driving the vehicle (forcibly learning mode). Then, clutch connection control is performed based on this learning point.

[Problems to be Solved by the Invention] However, in the above-mentioned forced learning mode, when the controller finishes calculating the learning points, it automatically returns to the normal control mode such as driving, so the operator does not notice this and cannot use the normal control mode. The start of cargo handling and driving operations may be delayed, reducing work efficiency.

The first and second inventions of the present application have been made to solve the above-mentioned problems, and the first purpose is that the vehicle suddenly changes from the forced learning mode to the normal control mode without the operator noticing. In order to prevent the controller from starting to move, it is possible to change the controller mode by displaying a message indicating that the controller is in forced learning mode, and once forced learning is completed, turning off the ignition key to make the operator aware that the control mode has changed. It is an object of the present invention to provide a connection learning device for a clutch control device that can be easily checked, can quickly start normal cargo handling work or traveling work, and has excellent work efficiency.

[Means for Solving the Problems] In order to achieve the above object, the device is interposed between the engine and the automatic transmission, and is reciprocated between a fully engaged position and a fully engaged position to disconnect the engine and automatic transmission. a clutch that engages, a clutch drive means that drives the clutch back and forth, a storage means that stores a reference actuation amount of the clutch drive means for a preset reference connection state of the clutch that is updated and determined from time to time; When the clutch is connected to a predetermined connected state, actuation amount calculation means calculates the actuation amount of the clutch based on the reference actuation amount, and control for driving and controlling the clutch drive means based on the calculation result of the actuation amount calculation means. means for determining whether or not the reference operating amount stored in the storage means has been erased; A connection amount learning device for a clutch control device comprising a reference actuation amount creation means for driving a clutch drive means to newly obtain a reference actuation amount and storing it in the storage means,
The first invention of the present application is provided with travel control means for stopping control for traveling after the reference operation amount creation means has finished creating the reference operation amount until an operation means for instructing the completion of the creation work is operated. This is the gist of the present invention, and the gist of the second invention is that the reference actuation amount creation means is provided with a display means for indicating that the reference actuation amount creation means is in progress.

[Operation] By employing the above-mentioned means, the reference actuation amount stored in the storage means is erased, and therefore, when creating a new reference actuation amount, the creation means uses the reference creation amount. After completing the creation, unless the operating means is operated, the traveling control means will not perform the control II for traveling.
Similarly, when the creation means is creating the reference operating amount, the display means displays that the creation is in progress.

[Embodiment] An embodiment in which the present invention is applied to a clutch control device for a forklift will be described below with reference to FIGS. 1 to 3.

In FIG. 1, the output of an engine 1 is transmitted to an automatic transmission 3 via a dry single-plate clutch 2.
The driving drive wheels 5 are driven forward and backward at a predetermined gear ratio via the differential gear mechanism 4.

The connected state of the dry single-plate clutch 2, which turns on and off the output of the engine 1, is adjusted in accordance with the stroke amount of a rod 6a that expands and contracts based on the drive of the clutch control actuator 6.

On the other hand, the automatic transmission 3 is operated by a forward/reverse switching actuator 2.
Gears can be changed to three positions (forward, neutral, and reverse) by driving No. 6, and gears can be changed to 1st (low speed) and 2nd by driving a shift changeover actuator (not shown).
speed (high speed).

The vehicle speed sensor 7 detects the rotational speed of the output shaft 3b of the automatic transmission 3 and outputs the detection signal to the human output interface 8. The rotational speed sensor 9 detects the rotational speed of the input shirt 3a of the automatic transmission 3, and outputs the detection signal to the interface 8. Further, the engine rotation speed sensor 10 detects the rotation speed of the output shaft of the engine 1 and outputs the detection signal to the interface 8.

The stroke detection sensor 11 is composed of a potentiometer and detects the stroke amount of the rod 6a of the clutch control actuator 6, that is, the clutch connection state, and the detection signal is converted into a digital signal by the A/D converter 12 and sent to the interface. 8 is output.

The accelerator sensor 13 is composed of a potentiometer and detects the amount of depression of an accelerator pedal 14 provided in the driver's cab, and the detected signal is converted into a digital signal by an A/D converter 15 and output to the interface 8.

The lever position sensor 16 detects the forward, neutral, and reverse positions of the forward/reverse switching lever 17 provided in the driver's cab, and the detection signal is converted into a digital signal by the A/D converter 19 and sent to the interface 8. Output.

The inching sensor 32 is composed of a potentiometer, and an inching pedal 33 provided at the driver's seat detects the amount of depression, and the detection signal is converted into a digital signal by the A/D converter 34 and output to the interface 8.

Further, the ignition sensor 31 is composed of a limit switch, detects the on/off position of the ignition switch 30 as an operating means associated with the operation of the ignition key, and outputs the detection signal to the interface 8.

Further, the forward/reverse switching sensor 27 is composed of a potentiometer and detects the three positions of forward, neutral, and reverse of the forward/reverse actuator in the automatic transmission 3, and the detection signal is converted into a digital signal by the A/D converter 2B. After that, it is output to the interface 8.

A central processing unit (hereinafter referred to as CPU) 21 serving as a creation amount calculation means, a judgment means, a reference operation amount creation means, and a travel control means is a read-only memory (hereinafter referred to as ROM).
22 and a readable and rewritable memory (hereinafter referred to as RAM) 23 as a storage means.
21 operates according to a control program stored in the ROM 22, and inputs detection signals from each of the sensors via the input/output interface 8.

The CPtJ21 always performs normal control for normal running of the vehicle, according to the control program stored in the ROM22.
A normal learning processing operation is performed to calculate the reference engagement amount (learning point) of the clutch 2 at any given time by operating a lever or the like. In addition, if the data of the reference actuation amount (reference stroke amount), which will be described later, stored in the RAM 23 is erased due to the battery as a backup power source being replaced, etc., the CPU 21 newly updates the reference actuation amount (reference stroke amount) of the clutch 2 Automatically performs forced learning processing operation that calculates the operating amount. Also, when a new reference operating amount is determined by forced learning processing, the ignition switch 3 is activated via the ignition sensor 31.
The CPU 21 waits for transition to the normal control mode until the 0-off operation is confirmed. Furthermore, the CPU 21 drives the lamp drive circuit 24 via the interface 8 during the forced learning processing operation, causes the check clamp 25 as a display means provided in the driver's cab to perform a high-speed blinking display, and during the calculation of the reference operating amount. , that is, it informs you that forced learning is in progress.

The CPtJ21 determines the connected state of the clutch 2 based on the stroke amount of the rod 6a of the clutch control actuator 6 and the reference actuation amount calculated according to the detection signal from the stroke detection sensor 11. . Moreover, the CPU 21 is connected to the accelerator sensor 13.
The amount of depression of the accelerator pedal 14 is calculated based on the detection number 18 from .

Then, the CPU 21 determines the engine rotation speed corresponding to the determined accelerator pedal depression amount based on the data stored in the ROM 22, and controls the engine 1 via the input/output interface 8 and the throttle actuator drive circuit 16a to achieve the determined rotation speed. It controls the rotation speed.

Further, the CPU 21 calculates the vehicle speed of the forklift based on the detection signal from the vehicle speed sensor 7, and calculates the rotation speed of the input shaft 3a based on the detection signal from the rotation speed sensor 9.

Further, the CPU 21 determines the switching operation position of the forward/reverse switching lever 17 based on the detection signal from the lever position sensor 16, and based on this, controls the forward/reverse actuator drive circuit 18 to switch the gear position of the automatic transmission 3. The forward and backward movement actuator 29 is driven and controlled through the control unit.

When the inching pedal 33 is depressed, the CPU 21 enters the inching control mode and controls the clutch control actuator 6 via the clutch actuator drive circuit 17a based on the signal from the inching sensor 32, and as the amount of depression increases, the clutch control actuator 6 is activated. 2 is moved within a range from a complete engagement position to a complete engagement position, and the vehicle is inched within that range.

Further, the CPU 21 determines that when the engine 1 is idling (the accelerator pedal is not depressed) and the vehicle speed is "0", that is, the forklift is stopped, the forward/reverse switching sensor 2
When it is determined that the automatic transmission 3 is in the neutral position based on the signal from 7, normal learning control is performed, that is, the reference stroke amount (learning point),
A processing operation is performed to store the data in the RAM 23 in place of the previously determined reference stroke amount.

Furthermore, if the reference stroke amount stored in the RAM 23 is erased due to battery replacement or the like, it becomes difficult to control the clutch 2 to a predetermined connected state via the actuator 6. Therefore, at the time of starting, that is, when the ignition key is turned on, the CPU 21 immediately checks whether the data of the reference stroke amount is stored in the RAM 23, and if the data has been deleted, executes a so-called forced learning mode. Then, create a new standard stroke amount. At the same time, while the reference stroke amount is being created, the CPU 21 controls the check clamp 25 to continue blinking at a high speed via the interface 8 and the lamp drive circuit 24.

In this state, the clutch 2 is fully disconnected, and based on the rotation of the output shaft of the engine 1 and the rotation of the input shaft of the automatic transmission 3, a preset reference connection state of the clutch 2 is determined, and the reference connection state is determined. Actuator 6 in the state
Find the stroke amount as the reference stroke amount.

That is, the CPU 21 gradually moves the clutch 2 in the connecting direction, and based on the movement of the clutch 2, the stroke amount (reference stroke amount) of the rod 6a of the clutch control actuator 6 when the input shaft 3a starts to rotate.
is determined as the half-clutch start position (reference connection state). In this embodiment, this operation is performed in 3 steps.
The average value of the three values is stored in the RAM 23 as a reference stroke amount. When the creation of the reference stroke amount is completed, the CPU 21 waits for the ignition switch 30 to turn off, and then ends the high-speed lighting of the CHIEF lamp 25 when the ignition switch 30 is turned off.

In the embodiment described above, the CPU 21 in the forced learning mode
Since the mode is shifted to the normal control mode by the driver's operation of the ignition key, the driver can reliably recognize this mode change.

Therefore, the driver can quickly start driving and cargo handling operations.

In addition, since the CPU 21 causes the check lamp 25 to blink at high speed in the forced learning mode, it can be determined whether forced learning is in progress based on the presence or absence of this blinking.

In addition, although the forklift was used in the above embodiment,
It may be embodied in a vehicle such as a passenger car or a truck.

Further, in the embodiment described above, the ignition key was turned off by the driver's operation, but it may be configured to turn off the ignition key automatically upon completion of the process. In this case, a drive means for driving the ignition key is provided, and after the CPU 21 stores the reference stroke amount in the drive means, the drive means is operated.

[Effects of the Invention] As detailed above, according to the first and second inventions of the present application, it is possible to easily confirm the mode conversion of the controller, and to quickly start normal cargo handling work or traveling work. ,
Demonstrates excellent work efficiency.

[Brief explanation of drawings]

FIG. 1 is a mechanical and electrical block circuit diagram of a forklift embodying the present invention, and FIG. 2 is a flowchart showing the processing of CPtJ. Engine 1, clutch 2, automatic transmission 3, clutch control actuator 6 as clutch drive means, CPU
(creation amount calculation means, judgment means, reference operation amount creation means,
21 as a travel control means, RAM as a storage means
23. Check clamp 25° as a display means Patent applicant Toyota Industries Corporation Fujitsu
Co., Ltd.

Claims (2)

[Claims] 1. a clutch interposed between the engine and the automatic transmission and reciprocating between a fully engaged position and a fully engaged position to connect and disconnect the engine and the automatic transmission; and a clutch driving means for reciprocating the clutch. , storage means for storing a reference actuation amount of the clutch driving means for a preset clutch reference connection state that is updated and determined from time to time; Actuation amount calculation means for calculating the actuation amount of the clutch as a reference; control means for driving and controlling the clutch driving means based on the calculation result of the actuation amount calculation means; and a control means for erasing the reference actuation amount stored in the storage means. determining means for determining whether or not the automatic transmission is in a neutral position; and when the determining means determines that the automatic transmission has been erased, the clutch driving means is driven with the automatic transmission held in a neutral position to newly obtain a reference actuation amount; In a clutch control device connection amount learning device comprising a reference actuation amount creating means stored in a storage means, after the reference actuation amount creating means finishes creating the reference actuation amount, an operating means for instructing the end of the creation work. A connection amount learning device for a clutch control device, which is provided with a travel control means that suspends control for travel until operated. 2. a clutch interposed between the engine and the automatic transmission and reciprocating between a fully engaged position and a fully engaged position to connect and disconnect the engine and the automatic transmission; and a clutch driving means for reciprocating the clutch. , storage means for storing a reference actuation amount of the clutch driving means for a preset clutch reference connection state that is updated and determined from time to time; Actuation amount calculation means for calculating the actuation amount of the clutch as a reference; control means for driving and controlling the clutch driving means based on the calculation result of the actuation amount calculation means; and a control means for erasing the reference actuation amount stored in the storage means. determining means for determining whether or not the automatic transmission is in a neutral position; and when the determining means determines that the automatic transmission has been erased, the clutch driving means is driven with the automatic transmission held in a neutral position to newly obtain a reference actuation amount; A connection amount learning device for a clutch control device comprising a reference actuation amount creation means stored in a storage means, the connection amount learning device for a clutch control device comprising a display means indicating that the reference actuation amount creation means is in the process of creating a reference actuation amount. .