JPS61157445A - Clutch control device - Google Patents

Abstract

PURPOSE:.To eliminate losses upon engaging and disengaging operation of a clutch, by determining the operating range of the cluatch before starting of a vehicle even if a learning value of initiating point of engagement of the clutch vanishes. CONSTITUTION:Normally, a determination routine for a clutch operating range is taken only when the gear is at its neutral position while a select lever is set at its neutral position, and therefore, clutch operation is carried out. However, when a stroke signal memory data which indicates the initiating point of engagement of the clutch, a select position signal is automatically st to be neutral even if a select lever is shifted to its travel range.

Description

[Detailed description of the invention] (#Usage field of element) Perform latch judgment operation to find the joint start point and complete contact point,
The present invention relates to a clutch control device that determines (learns) the operating range of a clutch.

(Prior Art) In recent years, vehicles equipped with automatic transmissions have been widely used in order to make vehicle driving operations more convenient. It has been proposed that such a vehicle uses an automatic clutch and operates a friction clutch (for example, a dry single-plate clutch) by a fluid actuator that is controlled at 1 g by an electronic control device.

FIG. 2 is a schematic diagram of the automatic clutch control device. In the figure, 1 is the flywheel of the engine, 2 is the clutch driven plate, 3 is the clutch pressure plate, and 4 is the pressure plate 3 as the flywheel! The clutch spring 5 that presses the clutch lever 16 operates the pressure plate 3 to the right in the figure against the force of the clutch spring 4. The clutch lever 16 operates the clutch release bearing 5 that operates the clutch lever 5. An adjustment interval S is provided between the engagement portion 51 and the engagement portion 51 .

7 is a clutch release fork that operates the release bearing 6; 8 is a lever whose one end is fixed to a fork vehicle 9 to which the release fork 7 is attached; lO is a clutch actuator that operates the lever 8; The piston 10b is movably disposed within the piston 10b, a piston rod foe whose one end is connected to the piston and whose other end is connected to the other end of the lever 8, and a return spring 10d.
11 indicates the oil chamber 10e and oil tank 12 of the clutch actuator 10! ! Hydraulic pump arranged in piping 13a to lA6, 14 is piping 13 near hydraulic pump ll
15 is an electromagnetic supply valve arranged in the pipe 13a, and 16 is an accumulator connected to the oil chamber foe of the clutch actuator and the oil tank 12. !
Pulse control is performed by an electromagnetic discharge valve disposed in the connecting pipe 13b. 17 is an accelerator pedal; 18 is an accelerator pedal sensor (for example, potentiometer, meter) that detects the operating position of the accelerator pedal 17; 19 is an engine rotation sensor disposed opposite to the flywheel l;
20 is a clutch stroke sensor (for example, a potentiometer) that detects the operating position of the piston rod 10c of the clutch actuator 10, and 21 is an input shaft rotation sensor disposed opposite to the in-boot shaft 22 of the transmission.

Reference numeral 23 denotes an electronic control unit composed of a microcomputer, which controls the accelerator pedal sensor 18, engine rotation sensor:
・S19. 4. In order to input signals from the clutch stroke sensor 20, input shaft rotation sensor 21, etc., and control the operation of the clutch 7 actuator lO according to the driving state of the vehicle. m controls the supply valve 15 and the electromagnetic discharge valve 16.

In such an automatic clutch, the magnetic supply valve 15
By opening, pressure oil is supplied to the oil chamber foe of the clutch actuator 10, and the piston 10b and piston rod 10c are actuated to the left in the figure. As a result, the lever 8 rotates around the shaft 9.

The clutch release fork 7 is rotated counterclockwise around the shaft 9 to move the release bearing 6 to the left in the figure, and the clutch lever 5 is actuated to operate the clutch pressure plate 3 to the right in the figure. As a result, the clutch is disengaged.

From this clutch disengaged state, when the electromagnetic supply valve 15 is closed and the electromagnetic discharge valve 16 is opened, the oil chamber 10e of the clutch 7 actuator 10 is connected to the tank 12. The clutch engagement operation is performed by operating the parts in the opposite manner to the operation when the clutch is disengaged. In this clutch engagement operation, the pulse duty for controlling the electromagnetic exhaust valve 16 is controlled according to the driving state of the vehicle, and the speed thereof is set to M'dl.

(Problems to be Solved by the Invention) Incidentally, the clutch engagement content relative to the operation amount of the clutch actuator 10 changes due to variations in manufacturing errors or wear of the clutch driven plate 2. In order to cope with this change, this type of conventional automatic clutch control device memorizes the connection start point and complete contact point of the two clutches, and also learns the clutch operation range as appropriate. (For example, Japanese Patent Application No. 58-119166) has been proposed by the applicants. Namely.

The stroke from the clutch start point to the complete contact point is:
This is about 1/4 of the movable stroke, and the operation time (300 msec) when performing disconnection/connection operations with a full stroke is four times the operation time of a stroke within the effective operation range only, resulting in wasted operation time. In response to this problem, the above-mentioned proposal by the applicants obtains a learned value for the clutch operation range, and even when the learned value cannot be obtained, it is possible to obtain a learned value for the clutch stroke and start the clutch stroke. A clutch control device that can perform efficient clutch control by setting the clutch operation range using the backup value of the point has been revealed. However, the clutch operation range is not learned or is not stored in memory. If data is lost for some reason, the clutch ftj1m is operated by relying on a backup value that is set to a certain value. It is not always possible to perform proper latch control in the operation after disconnecting the source cable at step S. In other words, in such a situation, start the car engine, set the select lever to neutral, and wait even for a few seconds. If you keep it warmed up, the starting point of clutch engagement will be automatically detected and the learned value will be memorized, but if you start the car and immediately put the select lever in the running position and start the car. , the clutch operation range is not learned, and clutch control is not performed based on the backup value.

Therefore, it is difficult to reliably deal with the wear condition of the 5-p hydride gin plate 2 or the non-uniformity of the clutch stroke for each vehicle, and when the wear is significant, the clutch control performed using the backup value is limited to the automatic clutch. There have been problems in that the control performance cannot be fully demonstrated and the operation feeling that is favorable to the driver is not provided.

(Means for Solving the Problems) The present invention was made in order to solve the problems of the conventional ones, and makes it possible to easily determine the operating range of the clutch, thereby ensuring stable automatic clutch performance. The purpose is to provide a clutch control double device that stores the clutch stroke signal, learns the reference value of clutch engagement content, and performs clutch disengagement and controllable operation.
In the control device, means for determining whether stroke signal data of the clutch is stored.

Means for outputting a select lever signal corresponding to the neutral position regardless of the position of the select lever when the clutch stroke signal data disappears, and a gear position signal and a select position signal both corresponding to the neutral position. The present invention is characterized in that it includes means for storing clutch stroke signal data corresponding to a signal transition start point and a complete contact point.

(Function) The present invention is capable of forcibly starting engagement after determining the driving condition of the vehicle when the position where a half-clutch starts, that is, the engagement start point, has not been detected and the corresponding data in the memory is O. I am trying to detect points.

(Example) An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows an electronic control device (control unit 7) 23 shown in FIG. 2 in an automatic clutch to which the present invention is applied.
FIG. 3 illustrates the relationship between the output (stroke signal) of the clutch stroke sensor 20 and the stroke of the clutch driven plate 2. FIG. 5 shows the flow of processing for determining (learning) the operating range by the control unit.

First, the conditions for starting the determination operation shown in FIG. 1 will be explained. When the power is turned on and the engine starts, the control circuit is initialized and the timer is set to T.
is set to O. First, a signal from the select lever switch corresponding to the operation of the select lever (control lever) is input.In step a), whether or not the select lever is in the neutral position is determined from the signal input (step
b).

When it is determined in step b above that the select lever is in the neutral position, the select position signal is unconditionally set to neutral (step f), and in step b
When it is determined that the select lever is not in the neutral position, the stroke signal data (hereinafter referred to as CUT: LE) indicating the starting point of clutch engagement is stored in the memory of the electronic control unit.
ARN) is detected and stored (step c), where CUT: LEA
When the RN is stored, a select position signal is supplied based on the signal from the select register switch (step e), and the select position is set. Also, when CUT:LEAR・N is not stored (C
UT: LEARN=00), it is determined whether the vehicle is stopped in the secondary step d, and when the vehicle is stopped, the select position signal is set to neutral regardless of the signal of the select lever switch t6 (step f). ).

If the vehicle is running, the input shaft is rotating, so normal learning cannot be performed, so proceed to step e to perform clutch control using the backup value as before, and select according to the signal from the select lever switch. A position signal is set.

After that, in step g, the signal corresponding to the amount of accelerator depression and the signal detecting the actual rotational speed of the engine are processed.
), output a shift command signal for the gear (step h), in which case, in step C, CUT: LEARN
If it is determined to be -0, even if the select lever is in the drive range, when the vehicle is stopped, the electronic control unit will perform the same control as when it is in the neutral range, and the shift operation command to the drive gear will not be issued. It is assumed that the shift has been completed with no output and the gear remains in neutral (Step I).

Thus, normally the gear is in the neutral position (step j
) and the select lever is in the neutral position (
Only in step k), the clutch operation is performed by moving to the step shown in FIG.
When the memory data of CUT: LEARN is erased, the electronic control unit automatically changes the select position signal to neutral even if the select lever is shifted to the driving range, provided the vehicle is stopped. So (step f), clara.

The operating range can be learned. As a result, learning is completed, CUT: LEARN is memorized, and step e
If the select lever OFF signal is generated in accordance with the operation of the select lever, the control cycle returns to normal control, that is, the control cycle moves from step j and step k to step standing.

Note that in step m, if the gear shift has not been completed, a stroke signal is output to keep the clutch in the disengaged state or to disengage it to a new disengaged position, and in step n
1 cycle (25 msec) is determined, and the process returns to the original step.

The following are the conditions for entering the flow of processing for determining (learning) the clutch operation range from step k above, and see FIG. 5 for the determination operation that is started when these conditions are satisfied. I will explain as I go along.

XT+ Check whether the car is stopped or not.

If Yes, process ■; if No, process (
Perform additional processing.

・′? ) The clutch is operated at high speed, and the point where the stroke signal change amount of the potentiometer becomes O is stored as a complete contact point (0th order) (return to process D).

・Check whether the φ complete contact point is stored or not.

If Yes, process ■; if No, process (
Returning to step 2, a complete contact point is detected and stored.

■ One process is performed at the 0th order of disengaging the clutch at high speed.

43. Check whether the clutch is in a disengaged state.

If Yes, process ■; if No, process ■
Process.

(Φ Performs 0th order 1st force processing to disengage the clutch at low speed.

■ Check to see if the input shaft has stopped rotating.

If Yes, process ■; if No, process (
Return to the processing of φ.

+a) Perform the process (2) in the 0th order, which performs clutch operation at low speed.

・Medium Check to see if the input shaft continues to stop rotating.

If 'fes', the process returns to (2), and if No, the necessary process is performed.

0 Input - Store the point at which the shaft begins to rotate as the splicing start point.

Through the following determination operations, the clutch engagement start point (anti-clutch start point) and complete contact point are learned and stored.

The absolute position of the clutch stroke is set as CLUTCHEAD, and the value converted to the relative position using a learning value based on CLUTCH:AD is set as CI, UTCH, and the relationship between the absolute position and relative position of the clutch stroke is shown in the following. This is Figure 4. Here, CNCT: LEARN is the learning value of the complete contact point stored by the process of above (■), and CNCT: 5T
RT is a relative value of CUT:LEARN, and the relative position CLUTCH is CLUTCH=CLUTCH:AD-CUT:LEARN+CNCT:5TRT.

(Effects of the Invention) As described above, the present invention makes it possible to always determine the clutch operation range before starting the vehicle even when the learned value of the clutch engagement start point disappears. By memorizing the stroke signal and learning the reference value of the clutch engagement amount, there is less waste when performing clutch disengagement and type control.

Moreover, the automatic clutch control performance can be fully demonstrated, and the driver can enjoy a favorable driving feeling.

[Brief explanation of the drawing]

Figure yA1 is a diagram showing the flow of operation for explaining one embodiment of the present invention, Figure 2 is a block diagram showing the configuration of a conventional automatic clutch control system, and Figure 3 is a diagram showing the clutch stroke and sensor. A diagram showing the relationship with the output, FIG. 4 is a diagram explaining the relationship between the absolute position and relative position of the clutch stroke,
FIG. 5 is a diagram showing the flow of processing for determining the operating range of the clutch. l... Engine flywheel 2... Clutch driven plate 3... Clutch pressure plate 4... Clutch spring 5... Clutch lever 6... Clutch release bearing 7... Clutch release fork 10... -Clutch actuator 15...Electromagnetic supply valve 16...Electromagnetic discharge valve 18...Accelerator pedal sensor 20...Clutch stroke sensor 21...Input shaft rotation sensor 23...Electronic igIm device. Patent applicant: IsuC Jichokusha Co., Ltd. (one other person) Representative: Minoru Tsuji, patent attorney Figure 3

Claims (1)

[Claims] In a clutch control device that stores a clutch stroke signal, learns a reference value of a clutch engagement amount, and performs clutch disengagement/disengagement control, means for determining whether or not the clutch stroke signal data is stored; Means for outputting a select position signal corresponding to the neutral position regardless of the position of the select lever when the clutch stroke signal data disappears, and when both the gear position signal and the select position signal are signals corresponding to the neutral position. 1. A clutch control device comprising means for storing stroke signal data of a clutch corresponding to a connection start point and a complete contact point.