JP2018119665A - Warning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a driver from driving in a state of putting his/her leg on a clutch pedal.SOLUTION: A warning device includes: a vehicle speed sensor 52 configured to detect a vehicle speed; a shift position sensor 53 configured to detect whether a manual transmission 40 is set into a predetermined gear stage; sensors 50, 51, 54 configured to detect whether a clutch 20 is in a semi-clutch state; a determination unit 110 configured to, when the vehicle speed exceeds a predetermined vehicle speed and the manual transmission 40 is set into the predetermined gear stage, determine an operational state where driver's leg is put on a clutch pedal in a case where the clutch 20 has been kept in the semi-clutch state for a predetermined time; and warning units 80, 120 configured to, when it is determined to be the above operational state, notify the driver of the fact.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a warning device, and more particularly, to a warning device for a clutch that is interposed between a drive source mounted on a vehicle and a transmission and is switched from contact to disconnection by a depression operation of a clutch pedal.

  As this type of warning device, for example, in Patent Document 1, a state where a difference between the input rotational speed and the output rotational speed of the clutch is determined as a half-clutch state, and the accumulated time of the half-clutch state reaches the upper limit threshold Then, a technique for warning is disclosed.

Japanese Utility Model Publication No. 2-2532

  By the way, some drivers have a habit of driving with their feet on the clutch pedal, even though they are in a traveling state that does not require a shifting operation. In such a case, the clutch pedal is slightly depressed beyond play, and the master cylinder is stroked. As a result, there is a possibility that an abnormal wear may occur due to the clutch being in a half-clutch state in spite of the situation in which the speed change operation is not performed.

  On the other hand, in the technique described in Patent Document 1, all states in which a difference occurs in the input / output rotational speed of the clutch are counted as half clutches. For this reason, all normal half-clutch operations such as when the vehicle is traveling at a low speed or starting are counted, and there is a problem that the driver is uncomfortable due to frequent warnings.

  The technology of the present disclosure aims to effectively prevent the driver from stepping on the clutch pedal.

  The technology of the present disclosure is a clutch warning device that is interposed between a drive source mounted on a vehicle and a manual transmission and is switched from contact to disconnection by a depression operation of a clutch pedal. Vehicle speed detecting means for detecting the gear, gear in detecting means for detecting whether or not the manual transmission is geared into a predetermined gear stage, and half clutch detecting means for detecting whether or not the clutch is in a half clutch state. Driving when the vehicle speed exceeds a predetermined vehicle speed, and the clutch is maintained in a half-clutch state for a predetermined time while the manual transmission is geared into a predetermined gear stage. Determining means for determining a footrest driving state in which a person is driving with a foot on the clutch pedal without a shifting operation while the vehicle is traveling; and determining the footrest driving state , Characterized in that it and a warning means for informing the information to the driver.

  In addition, the clutch includes a master cylinder that supplies an operating hydraulic pressure that switches the clutch from contact to disconnection in response to an operation of depressing the clutch pedal, and the half-clutch detection means calculates a stroke amount of the rod of the master cylinder. A stroke sensor for detecting, wherein the determining means continues the predetermined stroke amount for a predetermined time in a state where the vehicle speed exceeds a predetermined vehicle speed and the manual transmission is geared into a predetermined gear stage. It may be determined that the vehicle is in the footrest driving state when the stroke amount is equal to or greater than the stroke amount.

  Further, the predetermined stroke amount may be set as a stroke amount of the master cylinder corresponding to an amount of depression by which the clutch pedal exceeds play to bring the clutch into a half-clutch state.

  The half-clutch detection means includes an input rotation speed sensor that detects an input rotation speed of the clutch, and an output rotation speed sensor that detects an output rotation speed of the clutch, and the determination means has a predetermined vehicle speed. When the vehicle speed is exceeded and the manual transmission is geared into a predetermined gear stage, the rotational speed difference between the input rotational speed and the output rotational speed is continuously greater than or equal to a predetermined value for a predetermined time. You may determine with a footrest driving state.

  Further, the predetermined vehicle speed may be set at a speed when the vehicle is driven at a slow speed using a half clutch.

  According to the technology of the present disclosure, it is possible to effectively prevent the driver from stepping on the clutch pedal.

1 is a schematic overall configuration diagram of a vehicle equipped with a warning device according to an embodiment of the present invention. It is a flowchart figure explaining the warning process of the clutch footrest driving | operation which concerns on one Embodiment of this invention.

  Hereinafter, based on an accompanying drawing, a warning device concerning one embodiment of the present invention is explained. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a schematic overall configuration diagram of a vehicle 1 equipped with a warning device according to the present embodiment. An input shaft 42 of the manual transmission 40 is detachably connected to the crankshaft 11 of the engine 10 via the clutch device 20. In the transmission case 41 of the manual transmission 40, an input shaft 42, an output shaft 43, a counter shaft 44, a plurality of transmission gear trains 45 provided on these shafts 42 to 44, a synchronization mechanism (not shown), and the like are arranged. Yes. Left and right drive wheels are connected to the output shaft 43 of the manual transmission 40 through a propeller shaft 47, a differential device (not shown), left and right drive shafts, and the like.

  The vehicle 1 also includes an engine speed sensor (half-clutch detection means) 50 that detects the speed of the crankshaft 11 and a transmission input speed sensor (half-clutch detection means) 51 that detects the speed of the input shaft 42. Various sensors such as a vehicle speed sensor (vehicle speed detection means) 52 for detecting the speed of the vehicle 1, a shift position sensor (gear-in detection means) 53 for detecting the shift position of the shift operating device 72, a stroke sensor (half-clutch detection means) 54, etc. Kinds are provided. The sensor values of these various sensors 50 to 54 are input to an electronic control unit (hereinafter referred to as ECU) 100 that is electrically connected.

  The clutch device 20 is, for example, a dry / single-plate clutch device, and the crankshaft 11 of the engine 10 and the input shaft 42 of the manual transmission 40 are disposed in the clutch housing 21.

  A clutch disk 22 is provided at the input end of the input shaft 42 so as to be movable in the axial direction. The clutch disk 22 includes a damper spring (not shown) and a clutch facing 23.

  A flywheel 12 is fixed to the output end of the crankshaft 11, and a clutch cover 24 is provided on the rear side surface of the flywheel 12. A pressure plate 25 and a diaphragm spring 26 are arranged between the flywheel 12 and the clutch cover 24. Further, a release bearing 27 that contacts the inner peripheral end of the diaphragm spring 26 is provided on the output side of the input shaft 42 from the diaphragm spring 26 so as to be movable in the axial direction.

  The release fork 28 is provided so as to be swingable about the fulcrum 19, and one end side accommodated in the clutch housing 21 is brought into contact with the non-rotating wheel of the release bearing 27. Further, the release fork 28 has the other end protruding outside the clutch housing 21.

  A release cylinder 30 is provided outside the clutch housing 21. The release cylinder 30 is movably accommodated inside the cylinder body 31 and has a piston 32 that defines a hydraulic chamber, a push that has a proximal end fixed to the piston 32 and a distal end in contact with the release fork 28. A rod 33 and a spring 34 provided in the cylinder body 31 and holding the push rod 33 between the piston 32 and the release fork 28 are provided. The release cylinder 30 is connected to the master cylinder 60 via a pipe 35.

  The master cylinder 60 includes a reserve tank 61 that stores hydraulic oil, a piston 63 that is movably housed inside the cylinder body 62 and defines a hydraulic chamber, a base end side is fixed to the piston 63, and a front end side. Are connected to the clutch pedal 70, and a return spring 65 is provided in the hydraulic chamber and biases the piston 63. The master cylinder 60 is provided with a stroke sensor 54 that detects the stroke amount of the rod 64.

  In the clutch device 20, when the driver depresses the clutch pedal 70, the piston 32 moves integrally with the push rod 33 by the hydraulic pressure supplied from the master cylinder 60 to the release cylinder 30, and the release fork 28 is counterclockwise in the figure. By rotating around and pressing the release bearing 27, it is possible to switch from “contact” to “disconnect”.

  The ECU 100 performs various controls of the engine 10 and the like, and includes a known CPU, ROM, RAM, input port, output port, and the like. In order to perform these various controls, sensor values of various sensors 50 to 54 are input to the ECU 100.

  In addition, the ECU 100 includes a footrest determination unit 110 and a warning processing unit 120 as some functional elements. Each of these functional elements will be described as being included in the ECU 100 that is an integral piece of hardware, but any one of these may be provided in separate hardware.

  The footrest determination unit 110 is a determination unit of the present invention, and a state in which the driver is driving with a foot on the clutch pedal 70 without a shift operation while the vehicle is traveling (hereinafter referred to as a footrest driving state). ).

More specifically, the footrest determination unit 110 detects (1) a vehicle speed that the vehicle speed sensor 52 is faster than a predetermined vehicle speed V _th (for example, a speed at a low speed using a half clutch), and (2) a shift position sensor. (3) The stroke sensor 54 continues for a predetermined time (for example, about 10 seconds) in a state where it is detected that the gear 53 is engaged in a predetermined gear (for example, forward gear), and reaches a predetermined stroke amount _Sth . When the three conditions for detecting the reached state are satisfied, it is determined as the “footrest driving state”. The predetermined stroke amount S _th corresponds to the stroke amount of the master cylinder 60 that _brings the clutch device 20 into a half-clutch state (for example, the depression amount of about 10 to 20% when the clutch pedal 70 is slightly depressed beyond play). The stroke amount to be set) may be set as a reference.

  The warning processing unit 150 is an example of a warning unit according to the present invention. When the footrest determination unit 110 determines the “footrest driving state”, the warning processing unit 150 outputs an instruction signal that causes the speaker 80 or the like in the cab to sound an alarm. Note that the warning method is not limited to the sound from the speaker 80, and may be performed by displaying on a display (not shown) or the like in the cab.

  Next, based on the flowchart of FIG. 2, the warning process of the clutch footrest operation according to the present embodiment will be described. This control is started simultaneously with the ignition key ON operation of the engine 10.

In step S100, based on the sensor value of the vehicle speed sensor 52, it is determined whether or not the vehicle speed V of the vehicle 1 exceeds a predetermined vehicle speed _Vth (for example, a speed during low speed travel). If the determination is affirmative, the control proceeds to step S110.

  In step S110, it is determined based on the sensor value of the shift position sensor 53 whether or not the manual transmission 40 is geared in to a predetermined gear stage (forward gear). If the result is affirmative, the control proceeds to step S120. move on.

In step S120, based on the sensor value of the stroke sensor 54, the stroke amount S of the master cylinder 60 whether has reached the predetermined stroke amount S _th for the clutch device 20 to the half-clutch state is determined. If the determination is affirmative, the present control proceeds to step S130, and timing by a timer (not shown) built in the ECU 100 is started.

  In step S140, it is determined whether or not the elapsed time counted by the timer has reached a predetermined time (for example, about 10 seconds). If the determination is negative, the control returns to step S100. If the determination is positive, the control proceeds to step S150.

  In step S150, in response to the establishment of the conditions in steps S100 to S140, it is determined that the vehicle is in a footrest driving state. In step S160, an audio warning is performed by the speaker 80, and then this control is returned. The

As described above in detail, according to the warning device of the present embodiment, the vehicle speed sensor 52 detects a vehicle speed faster than the predetermined vehicle speed _Vth , and the shift position sensor 53 is geared into a predetermined gear stage. When the stroke sensor 54 detects a state where the stroke sensor 54 has reached the predetermined stroke amount _Sth continuously for a predetermined time in a state where this is detected, it is determined as a “footrest driving state” and a warning is issued. . As a result, the driver is alerted to the footrest operation as appropriate, and abnormal wear of the clutch facing 23 can be effectively prevented.

  In addition, the half-clutch caused by the footrest operation that does not involve a speed change operation while the vehicle is running is counted as a warning target, and the half-clutch when the vehicle 1 is traveling at a low speed or at the start is excluded from the warning target. The frequent occurrence of warnings caused by counting all the half clutches can be effectively prevented.

  In addition, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably and can implement.

For example, the sensor used for the half-clutch determination of the “foot-operated driving state” is not limited to the stroke sensor 54, and the engine speed sensor 50 and the transmission input speed sensor 51 may be used. In this case, the sensor value (clutch) of the engine speed sensor 50 is detected in a state where the vehicle speed sensor 52 detects the predetermined vehicle speed _Vth and the shift position sensor 53 detects that the gear is in the predetermined gear stage. When the difference in rotation speed between the input rotation speed) and the sensor input speed sensor 51 (clutch output rotation speed) is equal to or greater than a predetermined value indicating a half-clutch state for a predetermined period of time, Can be determined.

DESCRIPTION OF SYMBOLS 10 Engine 11 Crankshaft 20 Clutch device 21 Clutch housing 22 Clutch disk 23 Clutch facing 24 Clutch cover 25 Pressure plate 26 Diaphragm spring 27 Release bearing 28 Release fork 40 Manual transmission 42 Input shaft 50 Engine speed sensor (half clutch detection means)
51 Transmission input rotation speed sensor (half-clutch detection means)
52 Vehicle speed sensor (vehicle speed detection means)
53 Shift position sensor (gear-in detection means)
54 Stroke sensor (half-clutch detection means)
80 Speaker (Warning means)
100 ECU
110 Foot rest determination unit (determination means)
120 Warning processing section (warning means)

Claims (5)

A warning device for a clutch, which is interposed between a drive source mounted on a vehicle and a manual transmission and can be switched from contact to disconnection by a depression operation of a clutch pedal,
Vehicle speed detecting means for detecting the vehicle speed of the vehicle;
Gear-in detection means for detecting whether or not the manual transmission is geared into a predetermined gear stage;
Half-clutch detection means for detecting whether or not the clutch is in a half-clutch state;
When the vehicle speed exceeds a predetermined vehicle speed and the manual transmission is geared into a predetermined gear stage, the clutch is maintained in a half-clutch state for a predetermined time. Determining means for determining a footrest driving state in which the vehicle is driving with a foot on the clutch pedal without shifting operation while the vehicle is running;
A warning device comprising: warning means for notifying the driver of the information when the footrest driving state is determined. The clutch includes a master cylinder that supplies hydraulic pressure that switches the clutch from contact to disconnection according to a depression operation of the clutch pedal;
The half-clutch detection means is a stroke sensor for detecting a stroke amount of a rod of the master cylinder;
The determination means is when the vehicle speed exceeds a predetermined vehicle speed and the stroke amount continues for a predetermined time and is equal to or greater than the predetermined stroke amount in a state where the manual transmission is geared into a predetermined gear stage. The warning device according to claim 1, wherein the warning device is determined to be in a footrest driving state. 3. The warning device according to claim 2, wherein the predetermined stroke amount is set as a stroke amount of the master cylinder corresponding to a stepping amount at which the clutch pedal exceeds play to bring the clutch into a half-clutch state. The half-clutch detecting means is an input rotational speed sensor for detecting an input rotational speed of the clutch and an output rotational speed sensor for detecting an output rotational speed of the clutch;
In the state where the vehicle speed exceeds a predetermined vehicle speed and the manual transmission is geared into a predetermined gear stage, the determination means determines that a difference in rotation speed between the input rotation speed and the output rotation speed is a predetermined time. The warning device according to claim 1, wherein the warning device is determined to be in a footrest driving state when continuously exceeding a predetermined value. The warning device according to any one of claims 1 to 4, wherein the predetermined vehicle speed is set at a speed when the vehicle is driven at a low speed using a half clutch.

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