JPH11241736A - Half clutch learning vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a deficiency that an individual difference is generated on a learning value per person who operates the learning, and reliability is reduced, since the learning is carried out by an operator conventionally, in a half clutch learning vehicle which is provided with a half clutch learning value in a controller for controlling the vehicle, and which is used for judging whether a half clutch operation is carried out or not. SOLUTION: An engine rotating speed reducing rate is set in a controller 5 for judging whether a half clutch operation is carried out or not. A half clutch learning is carried out by a command from the controller 5 while driving a clutch hydraulic actuator 19 in a gradually connecting direction. The half clutch condition is judged when the engine rotating speed is reduced for the engine rotating speed reducing rate, and a clutch stroke detected by a clutch position sensor 22 is set as a learning value. Only when nearly same clutch stroke is obtained by carrying out a plurality of learning operations, the learning value is set as learning success, and thereby reliability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a half-clutch learning vehicle having a half-clutch learning value used in a controller for vehicle control to determine whether the clutch has been half-clutched. It is about.

[0002]

2. Description of the Related Art When a vehicle is started, a clutch is half-engaged to prevent engine stall. In a vehicle where the clutch can be controlled manually (clutch pedal) or automatically by the clutch actuator in response to a command from the controller, the half-clutch position is learned and the learned value is stored in the controller. It has been done. When automatically controlling the clutch, the clutch stroke detected by the clutch position sensor is compared with a learned value to determine whether or not the clutch is half engaged. In the present invention, such a vehicle is referred to as a "half-clutch learning vehicle" for convenience of description.

FIG. 3 is a diagram showing an example of a conventional half-clutch learning vehicle. In FIG. 3, 1 is a lever, 2 is a clutch control changeover switch, 3 is a brake switch,
Is a brake pedal, 5 is a controller, 6 is a clutch pedal sensor, 7 is a clutch pedal, 8 is a master cylinder, 9 is an accelerator opening sensor, 10 is an accelerator pedal,
11 is an engine, 12 is an engine rotation sensor, 13 is a clutch, 14 is a gear position sensor, 15 is a release fork, 16 is a transmission, 17 is a transmission rotation sensor, 18 is a hydraulic pipe, 19 is a clutch hydraulic actuator, and 20 is a slave cylinder. , 21 is a rod, 22 is a clutch position sensor, and 23 is a half clutch data read switch.

A brake switch 3, a clutch pedal sensor 6, and an accelerator opening sensor 9 detect whether or not each corresponding pedal has been operated or the degree of depression. The detection signal is sent to the controller 5. The gear position sensor 14 detects a current gear position in the transmission 16, and the clutch position sensor 22 detects a clutch position (clutch stroke) between clutch disconnection and clutch engagement. Transmission rotation sensor 17
Detects the rotation speed of the counter shaft of the transmission 16. The vehicle speed can be determined by performing a conversion process on the rotation speed in consideration of the gear ratio and the like. The detection signals of these sensors are also sent to the controller 5.
The controller 5 is configured as a computer.

[0005] The clutch hydraulic actuator 19 is an actuator that controls disconnection and connection of the clutch based on a control signal from the controller 5. Here, an example has been shown in which the clutch 13 can be automatically controlled by a signal from the controller 5 or can be controlled by the clutch pedal 7. Therefore, a clutch hydraulic actuator 19 is interposed in the middle of the hydraulic pipe 18 from the master cylinder 8 of the clutch pedal 7 to the slave cylinder 20 of the clutch 13.

[0006] The clutch control changeover switch 2 is a switch for switching whether to control the clutch 13 automatically or manually (by the clutch pedal 7). When the mode is switched to the manual side, the hydraulic pressure from the clutch pedal 7 is transmitted to the slave cylinder 20. When switching to the automatic side, a pump or the like (not shown) in the clutch hydraulic actuator 19 is operated by a signal from the controller 5, and the hydraulic pressure is transmitted to the slave cylinder 20 (in this case, the clutch pedal 7 is depressed). However, the hydraulic pressure is not transmitted to the slave cylinder 20).

The shift lever 1 has a built-in switch in the knob. When a driver applies a force to the shift lever to shift a gear, the switch is first turned on to sense the driver's intention to shift. . When the controller receives the switch-on signal, the clutch is disconnected in preparation for gear-in. After doing so, the gear is shifted.

By the way, when learning the half-clutch in such a vehicle, the driver actually operates the clutch. That is, while the engine 11 is rotating, the driver operates the clutch pedal 7 to gradually engage the clutch, and presses the half clutch data read switch 23 when it is determined that the clutch is half engaged. At this time, the clutch stroke detected by the clutch position sensor 22 is read and stored in the controller 5 as a learning value of the half clutch. The determination that the clutch has been half-engaged may be made while observing a change in the engine speed. For example, it may be determined that the clutch is half-engaged when the rotational speed is reduced by about 50 rpm from the rotational speed before the clutch is started to be engaged (that is, when the clutch is disconnected).

The half-clutch data reading switch 23 may be provided with a dedicated switch, but is often used in such a manner that it also serves as another switch. In addition, as literatures relating to a clutch automatic control vehicle in which a clutch can be manually and automatically controlled, for example, Japanese Unexamined Utility Model Publication No. 6-8825.
No. publication.

[0010]

(Problems to be Solved) However, in the above-described conventional half-clutch learning vehicle, there is an individual difference between a time point when it is determined that the half-clutch has been engaged and a method of pressing the half-clutch data read switch 23. There is a problem that the half-clutch learning value differs depending on the person who performed the test.

(Explanation of Problems) As described above, the time point at which it is determined that the clutch is half-engaged differs depending on how the learner feels or how the engine speed is read. Further, the time until the half-clutch data read switch 23 is pressed after the determination also varies depending on the learner. Therefore, the detection value of the clutch position sensor read into the controller 5 also differs depending on the person who performs the learning. An object of the present invention is to solve the above problems.

[0012]

According to the present invention, there is provided a friction clutch, a clutch actuator for driving the clutch, a clutch position sensor for detecting a stroke of driving the clutch, and a clutch. A controller for instructing an actuator to control the disengagement and connection of the clutch, and a half-clutch learning value used for determining whether the clutch is half-clutched is set in the controller by learning. However, in a half-clutch learning vehicle, when a predetermined half-clutch learning condition is satisfied, a half-clutch learning start switch for inputting a learning start signal to the controller, and an engine speed for determining that a half-clutch has been established. Engine speed reduction amount setting means in which the reduction amount is set, and half clutch learning A half-clutch detecting means for detecting that the engine speed has decreased by the engine speed reduction amount from the engine speed before the start of learning, and a storage means for storing a clutch stroke at the time of the detection. The clutch stroke stored in the storage means is set as a half-clutch learning value.

The half-clutch detecting means includes, for example, a pre-clutch control rotation speed memory for storing the engine speed before the start of the clutch control when learning the half-clutch.
Means for updating and storing the engine speed after the clutch control is started, means for storing the speed of the clutch after the start of the clutch control, and means for subtracting the value of the memory for the speed of the memory after the start of the clutch control from the value of the speed of the memory before the start of the clutch control. Is compared with a preset engine speed reduction amount.

Further, the learning performed before setting the half-clutch learning value is performed a plurality of times, and the storage means for storing the clutch stroke upon detection of the half-clutch can store the plurality of clutch strokes individually. Only when all of the stored values of the storage means are within a predetermined range that can be regarded as substantially the same, a half-clutch learning value can be set based on the stored value as learning success.

According to the present invention as described above, when the half-clutch learning value is set by learning, the controller automatically determines that the clutch is half-engaged. There is no room for individual differences among the performers. In addition, instead of setting a learning value by only one learning, when learning is performed a plurality of times and only when substantially the same value is obtained, the learning value is set based on the value. A learning value can be set.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a diagram showing an example of a half-clutch learning vehicle according to the present invention. Here, similarly to FIG. 3, a vehicle in which clutch control can be performed manually or automatically will be described as an example of a half-clutch learning vehicle. The reference numerals correspond to those in FIG. 3. 5-1 is a rotation speed memory before the start of clutch control, 5-2 is a rotation speed memory after the start of clutch control, 5-3 is a first clutch stroke memory, and 5-4 is a first memory of the clutch stroke. The clutch stroke second memory 24 is a half-clutch learning start switch. Those having the same reference numerals as those in FIG. 3 are the same as those in FIG.

In the present invention, the controller 5 determines the decrease in the engine speed due to the half-clutch so that the learning value does not differ between the learners. By doing so, individual differences can be eliminated. In order to further increase the reliability of the learning value, the learning is determined to be successful only when the learning value is obtained only by performing the learning multiple times and obtaining substantially the same value without setting the learning value only once. Then, a learning value is set based on the value.

The half-clutch learning start switch 24 is a switch for instructing the controller 5 to start half-clutch learning. The clutch is gradually controlled in the contact direction for learning the half-clutch. The pre-clutch control rotation speed memory 5-1 stores the engine rotation speed before the clutch control is started. It is. The clutch speed after starting clutch control memory 5-2 is a memory for storing the engine speed after clutch control for half-clutch learning is started, and the stored value reads the engine speed. Updated every time.

The first clutch stroke memory 5-3 includes:
This is a memory for storing a clutch stroke detected when it is determined that the clutch is half-engaged in the first learning. The clutch stroke second memory 5-4 is a memory for storing a clutch stroke detected when it is determined that the clutch is half-engaged in the second learning. In this example, only two memories for storing the detected half-clutch strokes are provided, because the number of times of learning until the learning value is determined is assumed to be two. The memory for storing the stroke of the half clutch is provided in the same number as the number of times of learning for determining the learning value. Therefore, if learning is performed A times to determine the learning value, A memories are provided up to the clutch stroke A memory. In short, a storage means having a capacity capable of storing all of the plurality of clutch strokes detected,
It is provided.

Next, the half clutch learning operation of the present invention will be described. FIG. 1 is a flowchart illustrating a half-clutch learning operation according to the present invention. When the learning is started, the controller 5 automatically controls the clutch and determines the learning value of the half clutch. Here, an example is shown in which learning is performed twice before the learning value is determined.

Step 1: Check whether learning conditions are satisfied. The learning condition is a kind of encryption condition, and the condition is determined in advance. For example, it is determined that some switches are operable, such as depressing the brake pedal 4, not depressing the accelerator pedal 10, and rotating the engine. Then, when the learning of the half clutch is started, by executing them, the controller 5 is made to recognize that the learning of the half clutch is started. The reason why the cryptographic operation condition is imposed on the start of the learning is that if the half-clutch learning can be easily started, the learning content may be inadvertently changed by the operation.

Step 2: If the learning conditions are satisfied, it is checked whether the half-clutch learning start switch 24 has been turned on. Step 3: If turned on, learning is started. First, the controller 5 reads the engine speed (N _S ). Since the read rotation speed is the rotation speed when the clutch control for learning the half clutch has not yet started,
The number of revolutions before clutch control is started is stored in the memory 5-1.

Step 4: The controller 5 issues a command to the clutch hydraulic actuator 19 to drive the clutch hydraulic actuator 19 in the contact direction by the minimum control amount capable of controlling the movement of the clutch. The minimum control amount is an amount predetermined by the controller 5. Step 5 ... When only driven into contact direction minimum control amount, reads the engine rotational speed N ₁ being detected by the engine rotation sensor 12, the clutch control after starting the rotational speed memory 5
-2.

Step 6: The difference (N) between the rotation speed N _S stored in the rotation speed memory 5-1 before the start of clutch control and the rotation speed N ₁ stored in the rotation speed memory 5-2 after the clutch control is started.
Seeking _S -N _1), checks larger than or the set rotational speed N _D that is set in advance (or _{N S -N 1> N D)} . Set rotation speed N _D
Is the amount of decrease in the engine speed that decreases when the clutch is half engaged, and this value is determined in advance with reference to the results of experiments and the like. The amount of decrease in engine rotational speed at the time of learning, the controller 5 is so judged that in the half-clutch as compared with the set rotation speed N _D, room for individual differences occur is eliminated. Yet, unless a larger than the set rotational speed N _D, only further minimum control amount of the clutch returns to Step 4 to drive the contact direction.

[0025] If a larger than Step 7 ... set rotational speed N _D, determines that in the half-clutch, then reads the clutch stroke C ₁ being detected from clutch position sensor 22, clutch stroke first memory 5
-3 is stored. This is the half clutch stroke obtained in the first learning. Steps 3 to 7 are the first learning. Step 8: The controller 5 instructs the clutch hydraulic actuator 19 to disconnect the clutch 13. This is the preparation for the second learning.

Step 9: The process from this to Step 13 is the second learning, and what is performed in each step is the first learning.
Since the learning is the same as the first learning, the description is simplified. In step 9, the engine speed _NM is read and stored in the pre-clutch control speed memory 5-1. Step 10: The clutch is driven in the contact direction by the minimum control amount. Step 11: The engine speed is read and stored in the speed memory 5-2 after the clutch control is started. Step 12: Rotational speed memory 5-1 before starting clutch control
(N _M −N ₂ ) between the rotation speed N _M stored in the rotation speed memory N ₂ and the rotation speed N ₂ stored in the rotation speed memory 5-2 after the clutch control is started.
But see if has become greater than the set rotational speed N _D.
If not, return to step 10.

Step 13: Difference in rotation speed (N _M -N ₂ )
But if a larger than the set rotational speed N _D, reads the clutch stroke C ₂ at that time is stored in the clutch stroke second memory 5-4. And Step 14: clutch stroke C ₁ stored in the clutch stroke first memory 5-3, the difference is set in advance within the controller 5 of the clutch stroke C ₂ stored in the clutch stroke second memory 5-4 investigate whether small or than the set error C ₀ you have. This is C
₁ and the C ₂ is to check whether similar. Therefore, the value of the setting error C ₀ is set to a value that can be regarded as the same between the two. If it is larger than the difference between the setting error C ₀ of C ₁ and C _2, both as not the same and considered, it is determined that the learning failure. In order to determine the learning value, it is necessary to start over from the beginning. If less than the difference between the setting error C ₀ in step 15 ... C ₁ and C _2, the learning is determined to be successful, formally determined learning value. The learning value is determined based on the clutch strokes C ₁ and C ₂ stored in each memory. For example, it may be adopted an average value of the two, it may adopt a value C ₂ of the newer second time.

In the above example, when the half-clutch learning value is set, learning is performed twice, but the learning may be performed a plurality of times other than two. Although the reliability of the learning value is slightly weakened, it can be set by one learning. Even in that case, there is no room for individual differences to enter. Further, the learning in the present invention does not involve the clutch pedal, and can be applied to any vehicle as long as the vehicle is such that the friction clutch is driven under the control of the controller. . Therefore, the present invention can be applied not only to a vehicle equipped with the clutch pedal 7 as shown in FIG.

[0029]

According to the present invention as described above, the following effects can be obtained. (Effects of Claims 1 and 2) When the half-clutch learning value is set by learning, the controller automatically determines that the clutch is half-engaged, so that there is room for individual differences between the learners. Disappears. (Effect of the Invention of Claim 3) In addition to the same effect as the invention of claim 1, the following effect is obtained. Rather than setting a learning value only once, learning is performed a plurality of times and only when almost the same value is obtained is set based on that value, so a highly reliable learning value can be set. .

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a half-clutch learning operation according to the present invention.

FIG. 2 is a diagram showing an example of a half-clutch learning vehicle according to the present invention.

FIG. 3 shows an example of a conventional half-clutch learning vehicle.

[Explanation of symbols]

1: shift lever, 2: clutch control changeover switch, 3
... Brake switch, 4 ... Brake pedal, 5 ... Controller, 5-1 ... Rotation speed memory before starting clutch control, 5
-2: Revolution speed memory after starting clutch control 5-3: Clutch stroke first memory, 5-4: Clutch stroke second memory, 6: Clutch pedal sensor, 7: Clutch pedal, 8: Master cylinder, 9: Accelerator Opening sensor, 10 ... accelerator pedal, 11 ... engine, 12 ... engine rotation sensor, 13 ... clutch, 14 ... gear position sensor, 15 ... release fork, 16 ... transmission, 17 ... transmission rotation sensor, 18 ... hydraulic pipe, 19 ... clutch hydraulic actuator, 20 ...
Slave cylinder, 21 ... Rod, 22 ... Clutch position sensor, 23 ... Semi-clutch data read switch, 24 ...
Half clutch learning start switch

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhiko Kobayashi 4-1-1 Uedanaka, Nakahara-ku, Kawasaki City Inside Transtron Co., Ltd. (72) Inventor Hiroyuki Arai 4-1-1, Ueodanaka, Nakahara-ku, Kawasaki City Inside the company Transtron

Claims (3)

[Claims] 1. A friction type clutch, a clutch actuator for driving the clutch, a clutch position sensor for detecting a stroke of driving the clutch, and a controller for instructing the clutch actuator to control disconnection and connection of the clutch. In a half-clutch learning vehicle in which a half-clutch learning value used to determine whether the clutch is half-clutched is set by learning in the controller, a predetermined half-clutch learning condition is A half-clutch learning start switch for inputting a learning start signal to the controller in an adjusted state, and an engine speed reduction amount setting means for setting an engine speed reduction amount for determining that the clutch is half-engaged; , The engine speed during half clutch learning is earlier than the engine speed before the start of learning A half-clutch detecting means for detecting that the engine rotation speed has decreased by a reduced amount, and a storage means for storing a clutch stroke at the time of the detection. A half-clutch learning vehicle, which is set as a learning value. 2. The clutch control device according to claim 1, wherein the half-clutch detecting means includes a pre-clutch control speed memory for storing the engine speed before the clutch control is started during half-clutch learning, and a clutch control for updating and storing the engine speed after the clutch control is started. Means for subtracting the stored value of the rotational speed memory after the start of clutch control from the stored value of the rotational speed memory after the start and the rotational speed memory before the start of the clutch control, and comparing the subtracted value with a preset amount of decrease in the engine rotational speed. The half-clutch learning vehicle according to claim 1, comprising a comparison means. 3. A learning means for performing a plurality of learnings before setting a half-clutch learning value, and a storage means for storing a clutch stroke at the time of detecting a half-clutch, can individually store the plurality of clutch strokes; The half-clutch learning value is set based on the stored value as learning success only when all of the stored values of the storage means are within a predetermined range that can be regarded as substantially the same. Half-clutch learning vehicle.