JP3475179B2 - Clutch control device - Google Patents

Clutch control device

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Publication number
JP3475179B2
JP3475179B2 JP2001029955A JP2001029955A JP3475179B2 JP 3475179 B2 JP3475179 B2 JP 3475179B2 JP 2001029955 A JP2001029955 A JP 2001029955A JP 2001029955 A JP2001029955 A JP 2001029955A JP 3475179 B2 JP3475179 B2 JP 3475179B2
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JP
Japan
Prior art keywords
control
clutch
vehicle
control mode
coasting
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Application number
JP2001029955A
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Japanese (ja)
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JP2002227885A (en
Inventor
啓一 北沢
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日野自動車株式会社
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Priority to JP2001029955A priority Critical patent/JP3475179B2/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for improving the fuel consumption rate of an automobile and operating the vehicle economically. The present invention relates to a device for automatically controlling a clutch to an open state in accordance with a natural driving operation to prolong a time for coasting a vehicle to economically drive the vehicle. The present invention is an apparatus developed for implementation on a large truck or bus, but can be widely implemented on other vehicles.

[0002]

2. Description of the Related Art Fuel consumption rate required for driving an automobile (fuel consumption required for traveling a unit distance, for example: liter /
Improving engine performance in order to improve 100 km) is the most basic measure, but various improvements have been made to gasoline engine and diesel engine at present, and engine is extremely high performance. Therefore, it cannot be expected that the fuel consumption rate will be further improved in the future. In addition, the program control circuit is used to improve the driving control characteristics by rationalizing the automatic speed change control according to the running state. Improvements aimed at reducing the difference in fuel consumption rates are also approaching the limit.

On the other hand, when the vehicle enters the steady running state, the clutch is opened or the transmission gear is set to the neutral state to reduce the influence of the friction of the engine for coasting to reduce the fuel consumption rate. Economicization of has been studied for a long time. For example, there is known a technique of automatically controlling the clutch to be in an open state to perform coasting according to a traveling condition, or a technique of automatically returning from the coasting state (Japanese Patent Laid-Open No. 7-237468, Japanese Patent Laid-Open No. 7-237468). (Kaihei 10-131779 publication).

[0004]

[Problems to be Solved by the Invention] For environmental protection or due to speed limitation of large vehicles on highways,
For large vehicles that consume a large amount of fuel, it is required to further improve the fuel consumption rate. The inventors of the present application have investigated how much the fuel consumption rate can be improved by performing coasting such as traveling with a clutch open by using a large vehicle, or traveling with a shift gear in neutral. Tested. As a result, in the state of high-speed driving on the highway for hundreds of kilometers, frequent overrunning by coasting will cause an additional 5% to 1%.
It was found that the fuel consumption rate could be improved by 0%.
Also, through this test, it is possible to maintain a vehicle speed within a certain range for a considerably long time during a period in which inertial running is performed by disconnecting the engine with the clutch or speed change gear, especially for large vehicles with large loads and passengers. Was also confirmed.

The main cause of improving the fuel consumption rate by analyzing the results of the coasting test on the highway is as follows.
When the clutch is opened or the transmission gear is set to neutral after entering the coasting state, the vehicle traveling and the engine rotation are separated from each other, and energy consumption due to engine friction is reduced. I also understood that.

Even when the automatic control is adopted, it is not appropriate to set the clutch open mode automatically regardless of the driver's intention in order to travel with the clutch open. However, it is not appropriate to perform a complicated or unnatural driving operation to set the clutch opening mode. For example, an operation of depressing the clutch while traveling is not an appropriate operation as a normal driving operation. Of course, safe driving operation must be performed even while the clutch open mode is set. Then, it is preferable that the mode of clutch opening during traveling can be released by some simple operation of the driver. Further, while the clutch is in the open state and the vehicle is coasting, for example, if the vehicle speed rises (downhill) or falls (uphill) beyond the limit value, the steered wheels are operated accordingly, When approaching a vehicle, it is not appropriate to continue traveling with the clutch open, and in such a case the control mode is automatically released without any specific driving operation. Good to do.

The present invention has been made against such a background, and an object thereof is to improve the fuel consumption rate of a vehicle (fuel consumption required for traveling a unit distance). An object of the present invention is to provide a device that can reduce fuel consumption and contribute to environmental protection. It is an object of the present invention to provide a device capable of setting a control mode in which a clutch is opened and a vehicle coasts according to a driver's intention by a simple and natural driving operation of the driver. The present invention, after the control mode for coasting the vehicle with the clutch in the open state is set, automatically releases this control mode by a specific driving operation,
An object is to provide a device that does not impair the stability and safety of vehicle travel. The present invention automatically releases this control mode when the state of the vehicle becomes a specific state even after the control mode for coasting the vehicle with the clutch in the open state is set, even if the vehicle is not driven. In addition, it is an object of the present invention to provide a device that does not impair the stability and safety of vehicle traveling. An object of the present invention is to provide a control device that allows a driver to correctly recognize that a control mode for coasting a vehicle has been entered. An object of the present invention is to provide a control device that allows a driver to correctly recognize that the control mode has been released from the state in which the vehicle is running in the control mode in which the vehicle coasts.

[0008]

SUMMARY OF THE INVENTION The present invention sets a control mode in which the clutch is opened and the vehicle coasts by being triggered by a sudden return of the accelerator pedal by a driving operation while the vehicle is traveling. Is the greatest feature.

That is, the present invention includes a control valve (3) for adjusting the fluid pressure for opening and closing the clutch (10) provided in the power transmission system for transmitting the rotational output of the engine to the drive wheels, and vehicle speed information. In a clutch control device provided with a control circuit (4) for controlling the control valve (3) by inputting vehicle state information and driving operation information, the control circuit (4) includes: a) the clutch is in a contact state. , And b) the speed change gear is set to a forward gear of a predetermined level or higher, c) the vehicle speed is higher than a predetermined value, and d) the accelerator pedal (5) is depressed from the state where the accelerator pedal (5) is depressed. And means for controlling the control valve (3) to open the clutch to set the control mode for coasting the vehicle according to the determination output of the determination means. Is characterized by.

The numbers in the above parentheses are the reference numbers of the embodiment drawings described later. This is a supplemental description for easy understanding of the configuration of the present invention, and is not for limiting the understanding of the invention to the embodiments.

The conditions for determining that the accelerator pedal has been suddenly released can be selected in various ways. Desirably, the displacement amount of the accelerator pedal is taken in, and the displacement amount is from a first predetermined value (α 1 ) to a second predetermined value (α 2 ) where the accelerator displacement (or accelerator opening) is smaller than the first predetermined value. ) to become until the time (t 1) a predetermined time (t 0)
It is preferable that the configuration includes a means for detecting the following. The inventor of the present application tested various conditions for determining that the accelerator pedal was suddenly released, and compared these conditions. It is also possible to take in the displacement of the accelerator pedal, obtain the displacement speed by differentiating this time, and determine that the accelerator pedal has been suddenly returned when the displacement speed is larger than a predetermined value. However, when a trial test was conducted, in this case, the time derivative of the displacement of the accelerator pedal contained a lot of noise due to vehicle vibration and other factors, and in order to make a stable determination by this method, a new noise removal circuit was used. Or it turns out that software is needed and not always the best way.

The driving operation of depressing the accelerator pedal to a certain degree and suddenly releasing the accelerator pedal is a simple operation, and is not an unnatural operation in a steady running state. Moreover, such a driving operation can be intentionally performed. Since this driving operation is not a manual operation, it is a driving operation that can be performed while gazing ahead of the road surface. Therefore, the safe driving operation can be executed without hindering it.

The above conditions a) to d) are conditions in which the vehicle is capable of traveling at a cruising speed, and when the accelerator pedal is suddenly released in this state, coasting is performed as a driving operation based on the driver's intention. Assuming that the mode is selected, the clutch is controlled to the open state and the coasting control mode is entered even if the clutch is not operated. Other conditions may be added in addition to the above a) to d). In the coasting control mode, the accelerator desirably has a minimum displacement (minimum opening). In the coasting mode, the engine can be automatically stopped when a predetermined time has elapsed.

The forward gear having a predetermined speed or more as the speed change gear, which is the condition of b), is, for example, a sixth forward speed or a seventh forward speed in a freight vehicle having seven forward gears, For vehicles with 4 forward gears, the 4th forward gear, and for large tow vehicles with 16 forward gears, the 13th or higher forward gear, etc. arbitrarily and rationally according to the characteristics of the vehicle. Can be designed.

The vehicle speed above the predetermined value, which is the condition of c), can be arbitrarily designed according to the purpose of use of this device. For example, the driving speed can be set to 60 km / h or more, and the control mode for coasting can be set only while driving on a highway.
It is also possible to set a traveling speed of 0 km / h or more. Alternatively, this predetermined value can be sold by allowing the user to set a desired value according to the intended use. Further, the driver can be configured to set a predetermined value of the vehicle speed by an operation.

In the trial manufacture and the test for confirming the effect of the present invention, a clutch provided between the engine and the transmission gear, which has been conventionally known, is used, and the clutch pedal is used to control the opening / closing of the clutch. It was done by remodeling the one with the configuration. However, the clutch for coasting according to the present invention is not necessarily the one for torque conversion provided between the engine and the transmission gear. In principle, the position of the clutch may be provided anywhere in the rotary power transmission system for transmitting the rotational output of the engine to the drive axle. For the control mode of coasting according to the present invention, a dedicated clutch can be provided in addition to the conventionally known clutch. Further, the present invention can be implemented by using various types of clutches, instead of the so-called mechanical clutch that mechanically opens and closes.

When the control mode for coasting is set, it is preferable to equip a driver's seat with a display means for simultaneously producing an optical display and / or an acoustic display. The acoustic display is, for example, one chime sound. By listening to such an acoustic display, the driver can recognize that the control mode for coasting has been entered after performing the operation of suddenly returning the accelerator. In this case as well, it is possible to recognize the road ahead while keeping a close eye on it.
Further, it is possible to recognize that the control mode for coasting is continuing by the optical display.

When the coasting control mode is in a continuous state, this control mode can be automatically canceled by a driving operation.

When in the control mode for coasting, the means for canceling this control mode by a driving operation is:
When the accelerator pedal is pressed to a depth greater than a predetermined value, the brake pedal is pressed at a pressure higher than a predetermined value, the exhaust brake is operated to a braking state, the steered wheels are operated more than a predetermined angle, the clutch When the pedal is stepped to a predetermined depth or more, when the shift lever is operated, and the like. These are preferably configured to release the control mode for coasting by any one operation, but can also be configured to release the control mode when two or more operations overlap. The driving operation for releasing this control mode can be set to other than the above. Further, when any of the driving operations for canceling the control mode is performed, the condition for canceling the control mode is established before the control mode for coasting is set, so in principle, It is not possible to enter the control mode that causes inertial operation. Each driving operation will be described in more detail in the description of the embodiments.

Further, in the vehicle equipped with the inter-vehicle distance detecting device, when the inter-vehicle distance with the preceding vehicle becomes less than a predetermined value due to the detection output of the inter-vehicle distance detecting device in the control mode for coasting. It is desirable to release this control mode automatically without depending on the driving operation. When the vehicle speed exceeds a predetermined upper limit or lower limit in the coasting control mode, the vehicle is accelerated by traveling downhill, or is decelerated by traveling uphill or due to traveling resistance or wind pressure. Therefore, it is desirable that the control mode is automatically released at this time as well, without depending on the driving operation.

When the vehicle is running in the control mode in which the vehicle coasts, the engine is in the minimum rotation speed (idling) or in the engine stopped state. Therefore, when the control mode for coasting is released, if the relative speed difference of the clutch is large, the vehicle speed will change abruptly, so the engine speed will be adjusted automatically with the clutch open. It is desirable to generate a control signal to increase the engine rotation speed and control the clutch to be in the on state after the difference in the rotation speed of the clutch in the opened state becomes equal to or less than a predetermined value.

When the control mode for coasting is released, the optical display is released and an acoustic display is generated on the driver's seat so that the driver can recognize that the control mode has been released. It is desirable to do.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a clutch control device according to an embodiment of the present invention. The device of this embodiment is of a form that utilizes the clutch 10 provided between the engine and the transmission as described above. The clutch 10 is configured to be controlled via a clutch booster 2 by a clutch pedal 1 provided in a driver's seat. Using this device, the clutch 10 can be controlled to be opened and closed by adjusting the hydraulic pressure supplied to the clutch booster 2 by the control valve 3 without operating the clutch pedal 1. This control valve 3 is an input / output interface (I / O)
It is controlled by the control circuit 4 via. This control circuit 4
Is a program control circuit.

The input information of the control circuit 4 is the displacement information of the accelerator pedal 5, the output information of the rotation sensor 6 indicating the vehicle speed, and the output information of the clutch displacement sensor 7. These are input to the control circuit 4 via an input / output interface (I / O). In addition to this, the control circuit 4 receives as input information the service brake state information from the pneumatic brake control system 11, the position information of the transmission gear selected from the transmission 12, and the steering angle information of the steered wheels from the steering system 13. , Exhaust brake operation information from the exhaust brake control system 14, vehicle-to-vehicle distance information from the inter-vehicle distance detection device 15, and engine status information from the engine control system 16 via an input / output interface (I / O). Take in. Further, the control circuit 4 is provided with means for controlling the engine rotation speed in the engine control system 16 via an input / output interface (I / O). This is to adjust the engine speed so that the speed difference of the clutch 10 becomes small when the control mode for coasting is released and the clutch 10 changes from the open state to the contact state. This will be explained in detail later. Further, from the control circuit 4 via the input / output interface (I / O),
The display output is sent to the display lamp 8 provided in the driver's seat and the chime 9 which is an acoustic display device.

FIG. 2 is a flowchart showing the operation of the main part of the control circuit 4. The control operation of the control circuit 4 will be described. When the vehicle is in a traveling state, this clutch control device controls the clutch 10 to be in the open state to disconnect the engine rotation from the drive axle and to coast the vehicle. The feature is that a mode is provided. That is, it means that the vehicle is in a traveling state, a) the clutch 10 is in the contact state, b) the transmission gear is in the sixth speed or the seventh speed, and c) the vehicle speed is equal to or higher than a set value v 0 (for example, 80 km / h). that's all)
D) The control circuit 4 recognizes that the four conditions that the displacement of the accelerator pedal 5 is at the position of α 1 (for example, 30% of the maximum opening) are simultaneously satisfied.

In this state, it is assumed that the displacement of the accelerator pedal 5 becomes small and becomes a displacement α 0 (for example, 10% of the maximum opening). FIG. 3 is a diagram showing the displacement of the accelerator pedal 5 on the time axis. When the displacement of the accelerator pedal measures an elapsed time t 1 for changing from the opening α 1 to the opening α 0 , and when this is a preset time t 0 (for example, 0.2 seconds) or less, a driving operation is performed. Thus, it is determined that the accelerator pedal is suddenly released, the clutch 10 is controlled to open, and the coasting control mode is set. At this time, the chime 9 in the driver's seat is sounded once to generate an acoustic display, and the driver is made aware that the control mode for coasting has been entered. At the same time, the display lamp 8 on the driver's seat is turned on to indicate that the control mode is continuing.

FIG. 4 is a characteristic diagram showing the effect of the control mode for coasting according to the present invention. Now, it is assumed that the accelerator pedal is operated as shown by the solid line labeled "accelerator" in FIG. 4 as time passes. Now time T 0
Then, it is assumed that the accelerator pedal is released. Then, the torque generated by the engine is reduced accordingly. In the conventional example, this torque becomes negative because of engine friction. That is, it acts to reduce the vehicle speed. However, in the embodiment of the present invention, since the engine is disconnected, the generated torque becomes substantially zero. That is, the generated torque is effectively used only in the shaded area.
This means making fuel consumption economical.

Furthermore, in the conventional device, the above-mentioned negative torque is applied.
Since the vehicle speed will decrease due to Luke, time T1 Then again
You will have to step on the cell pedal. This will
Fuel is used in the engine, torque is generated, and the vehicle speed is accelerated.
Be done. On the other hand, in the device of the embodiment of the present invention, the time T1 so
It is possible to continue coasting continuously.
Sexual driving is time T when time has passed further2 Continued until
It Time T2 Then the vehicle speed becomes slower and the accelerator pedal is depressed.
Get caught That is, in the device of the embodiment of the present invention, the time T 0 From
Time T2 Until the accelerator pedal is released.
Therefore, time T1 From time T2 Among the conventional equipment
The torque is equivalent to the shaded area compared to
It is no longer necessary to generate fuel
The amount of consumption will be economical.

When the control mode for coasting is continued, this control mode is canceled by a driving operation or automatically. In this embodiment, the control mode for canceling the control mode is not provided, but the control mode for coasting is automatically canceled by the normal driving operation. As configured.

That is, one condition for the release by the driving operation is when the accelerator pedal 5 is stepped to a displacement more than a predetermined value. The depression of the accelerator pedal 5 means that the driver is trying to accelerate the vehicle by a driving operation, and cancels this control mode on the assumption that it is meaningless to continue the inertia running. When the accelerator pedal 5 is stepped to a predetermined displacement or more, it means that the displacement α described above is used to detect the sudden release of the accelerator pedal.
It is independent of 1 or α 2 .

Another condition for canceling the coasting control mode by a driving operation is when the brake pedal is depressed with a pressure higher than a predetermined pressure. The stepping on of the brake pedal means that the driver is trying to decelerate the vehicle, and this control mode for coasting should be released. Further, another condition of the release is when the exhaust brake is operated in the braking state by the driving operation. This means that the driver is trying to decelerate the vehicle by using the exhaust brake by the driving operation, and at this time, the clutch must be in the engaged state.

Still another releasing condition is when the steered wheels are operated by a predetermined angle or more by a driving operation. It is necessary to steer in accordance with a small lane curve while traveling in one lane at a substantially constant speed. It is preferable that such a steering angle is set so as not to react as a condition for canceling the control mode for coasting. However, it is desirable to continue the coasting in order to stably perform the driving operation when a large steering is performed in an attempt to change lanes or when steering is performed at a large angle to prevent danger. Rather, the operating performance should be ensured with the clutch 10 in the engaged state. Therefore, when the steered wheels are operated by a predetermined angle or more, the coasting control mode is automatically released. The above-mentioned predetermined angle of the steered wheels should be variably set according to the characteristics of the individual vehicle or the size of the load.

Still another releasing condition is when the clutch pedal is depressed to a depth greater than a predetermined value by a driving operation.
At this time, the control mode for coasting is automatically canceled assuming that the driver has an intention to perform a driving operation such as a gear shifting operation following the operation of the clutch pedal. Further, the same applies when the shift lever is operated. That is, the operation of the shift lever is a driving operation for accelerating or decelerating the vehicle using the engine, and the control mode for coasting is not in a state to be continued. Here, the shift lever is a lever for instructing upshifting or downshifting, and is implemented on a device that automatically performs a shifting operation according to an instruction from the shift lever without operating a clutch.

Besides this, it is not due to the driving operation,
It was designed so that the control mode for coasting automatically is released depending on the vehicle condition. One of them is the case where this vehicle is equipped with an inter-vehicle distance detecting device, and when the inter-vehicle distance with the preceding vehicle becomes a predetermined value or less due to the detection output of this inter-vehicle distance detecting device, the driving operation is performed. Even if it is not performed, the control mode is released to operate so as to prompt the driver to actively drive. In such a situation, the chime is used to let the driver recognize that the coasting mode has been canceled, and the inter-vehicle distance detection device issues an alarm to slow down the vehicle speed and perform other appropriate driving operations. Will encourage others.

Further, when the vehicle speed exceeds a predetermined upper limit or lower limit in the control mode for coasting,
When the vehicle is accelerating on a downhill, or when the control mode for coasting is unable to maintain the vehicle speed for a long time, at this time, this control mode is automatically released and an acoustic display is given to the driver. By recognizing it, it is configured to prompt an appropriate driving operation. The predetermined upper limit or lower limit of the vehicle speed is also a numerical value to be selected according to the vehicle characteristics. As an example, the vehicle speeds when entering this control mode are + 5% and -15%.

Next, the control for adjusting the rotational speed of the clutch when the control mode for coasting is released will be described. When the clutch is controlled to change from the open state to the contact state when the control mode for coasting is released, the engine has been in the idling state (or stopped state) until then, so the clutch suddenly changes to the contact state. It will be accelerated. This will cause shock or vibration to the vehicle. In order to avoid this, when the control mode is released, the control of the clutch is temporarily waited. That is, the control circuit 4 automatically sends a control signal to the engine control system 16 to increase the rotation speed of the engine and control the clutch to be in the engagement state after the rotation speed difference between both sides of the clutch 10 in the opened state becomes small. To do. When a test was conducted by the device of this example, when the rotational speed difference between the both sides of the clutch was within a rotational speed range of ± 10% or less, for example, the clutch was controlled to be in the contact state, so that the clutch 10 was in the contact state. Almost no shock or vibration can be felt when it becomes.

[0037]

As described above, according to the present invention, it is possible to improve the fuel consumption rate associated with vehicle travel by extending the time during which the engine rotation is disconnected from the drive axle. Fuel consumption can be reduced and it can contribute to environmental conservation. The device of the present invention can set the control mode in which the clutch is opened and the vehicle coasts according to the intention of the driver by a simple and natural driving operation of the driver. In addition, even after the control mode for coasting the vehicle with the clutch in the open state is set, this control mode is automatically released by a specific driving operation, and the stability and safety of vehicle traveling are not impaired. . The device of the present invention automatically sets the state of the vehicle to a specific state after the control mode for coasting the vehicle with the clutch in the open state is set, even if the vehicle is not driven intentionally. The control mode is not released and the stability and safety of vehicle traveling are not impaired. Further, the device of the present invention enables the driver to correctly recognize that the control mode for coasting the vehicle is entered, and the control mode is released from the state where the vehicle is traveling in the control mode for coasting. The driver can correctly recognize the fact.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a control flowchart of a main part of the control circuit according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a configuration for recognizing a driver's operation intention from a displacement characteristic of an accelerator pedal.

FIG. 4 is a diagram for explaining economic effects according to the present invention.

[Explanation of symbols]

1 clutch pedal 2 clutch booster 3 control valve 4 control circuit 5 accelerator pedal 6 Rotation sensor (for vehicle speed detection) 7 Clutch displacement sensor 8 indicator lamp (optical display) 9 Chime (acoustic display) 10 clutch 11 Pneumatic brake control system 12 gearbox 13 Steering system 14 Exhaust brake control system 15 Distance detection device 16 Engine control system

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-236932 (JP, A) JP-A-10-129305 (JP, A) JP-A-55-123529 (JP, A) JP-A-61-1 287827 (JP, A) JP 55-136624 (JP, A) JP 4-257739 (JP, A) JP 11-48823 (JP, A) JP 11-13787 (JP, A) Actually open 59-62036 (JP, U) Actually open 60-131429 (JP, U) Actually open 57-166943 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) F16D 48/02 B60K 35/00 B60K 41/00 F16H 61/00

Claims (13)

(57) [Claims]
1. A control valve for adjusting a fluid pressure for opening and closing a clutch provided in a power transmission system for transmitting a rotation output of an engine to driving wheels, and vehicle state information including vehicle speed information and driving operation information. A clutch control device comprising a control circuit for controlling this control valve as an input, wherein the control circuit comprises: a) the clutch being in a contact state, and b) a shift gear set to a forward gear of a predetermined stage or more, And c) a means for determining that the vehicle speed is equal to or higher than a predetermined value, and d) a sudden release of the accelerator pedal from a state where the accelerator pedal is depressed, and the control valve is controlled by the determination output of the determining means. controlling and means for setting a control mode for coasting the vehicle to the clutch in an open state, means for determining that the accelerator pedal is returned abruptly
Takes in the displacement of the accelerator pedal, and
The accelerator displacement is smaller than the first predetermined value from the first predetermined value.
The time to reach the second predetermined value is less than the predetermined time
A clutch control device, characterized in that it includes means for detecting the fact that
2. The control mode for coasting is set.
The driver's seat with an optical and / or audible
The clutch control device according to claim 1, further comprising display means for generating an indication .
3. The control circuit controls the coasting.
In the control mode, the accelerator pedal
This control mode is released when the
The clutch control device according to claim 1 , further comprising means for removing the clutch.
4. The control circuit, when in the control mode for coasting, controls the brake pedal by a driving operation.
The clutch control device according to claim 1, further comprising means for canceling the control mode when the pedal is depressed with a pressure of a predetermined value or more .
5. Transmission of engine rotational output to drive wheels
For opening and closing the clutch provided in the power transmission system
A control valve that controls the fluid pressure and the vehicle condition including vehicle speed information.
This control valve is controlled by inputting condition information and operation information.
In a clutch control device including a control circuit for controlling, a) the clutch is in a contact state, and b) a shift gear is set to a forward gear of a predetermined stage or more, and c) a predetermined value or more. The vehicle speed is equal to, and d) means for determining that the accelerator pedal is suddenly released from the state where the accelerator pedal is depressed.
And the control valve is controlled by the judgment output of this judgment means.
Control to open the clutch to coast the vehicle.
And a means for setting a control mode, wherein the control circuit operates the exhaust brake to a braking state by a driving operation when in the control mode for coasting.
A clutch control device comprising means for canceling this control mode when the clutch control device is actuated.
6. The control circuit, when in a control mode in which the coasting is performed, causes the steered wheels to move at a predetermined angle by a driving operation.
The clutch control device according to claim 1, further comprising means for canceling the control mode when operated more than once .
7. The clutch pedal is operated by a driving operation when the control circuit is in the control mode for coasting.
The clutch control device according to claim 1, further comprising means for canceling the control mode when the vehicle is stepped on to a predetermined depth or more .
8. The engine rotational output is transmitted to driving wheels.
For opening and closing the clutch provided in the power transmission system
A control valve that controls the fluid pressure and the vehicle condition including vehicle speed information.
This control valve is controlled by inputting condition information and operation information.
In a clutch control device including a control circuit for controlling, a) the clutch is in a contact state, and b) a shift gear is set to a forward gear of a predetermined stage or more, and c) a predetermined value or more. The vehicle speed is equal to, and d) means for determining that the accelerator pedal is suddenly released from the state where the accelerator pedal is depressed.
And the control valve is controlled by the judgment output of this judgment means.
Control to open the clutch to coast the vehicle.
And a means for setting a control mode, wherein the control circuit includes means for canceling the control mode when a shift lever is operated by a driving operation when in the control mode for coasting. Clutch control device.
9. Transmission of engine rotational output to drive wheels
For opening and closing the clutch provided in the power transmission system
A control valve that controls the fluid pressure and the vehicle condition including vehicle speed information.
This control valve is controlled by inputting condition information and operation information.
In a clutch control device including a control circuit for controlling, a) the clutch is in a contact state, and b) a shift gear is set to a forward gear of a predetermined stage or more, and c) a predetermined value or more. The vehicle speed is equal to, and d) means for determining that the accelerator pedal is suddenly released from the state where the accelerator pedal is depressed.
And the control valve is controlled by the judgment output of this judgment means.
Control to open the clutch to coast the vehicle.
And a means for setting a control mode, the inter-vehicle distance detecting device is equipped, and the control circuit detects the inter-vehicle distance when in the control mode for coasting.
Distance from the preceding vehicle is set to a specified value by the detection output of the output device
A clutch control device comprising means for releasing this control mode when the following occurs .
10. The control circuit, when in the control mode for coasting, controls the vehicle speed to a predetermined upper or lower limit.
2. The clutch control device according to claim 1, further comprising means for canceling the control mode when exceeding the limit.
11. The control circuit opens the clutch when the control mode for coasting is released.
Control signal for automatically adjusting the engine speed
The speed difference between the clutch and the clutch that is open.
Control the clutch in the engaged state until it falls below a specified value.
The preceding claims 3 and means for waiting a clutch control device according to any one of 1 0.
12. The control circuit releases the optical display when the control mode for coasting is released.
The clutch control device according to claim 2 , further comprising :
13. The control circuit generates an acoustic display on a driver's seat when the control mode for coasting is released.
Clutch control apparatus according to claim 1 2, further comprising means for.
JP2001029955A 2001-02-06 2001-02-06 Clutch control device Active JP3475179B2 (en)

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