JP2008070193A - Instrument display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instrument display device capable of preventing display of a digital speedometer from being changed by performing racing of an engine, even in the case where actual vehicle speed is zero. <P>SOLUTION: In the state where 'zero' display of the speedometer 32 is continued as long as a prescribed time (for example, 0.5 second) or longer (step S10), a transmission 52 is in a neutral state (step S11), an engine rotational frequency is a prescribed value (for example, 5,000 rpm) or higher (step S14), and a pulse signal inputted from a vehicle speed sensor 21 into a control part 45 of a meter unit 30 is smaller than a prescribed value (for example, a value equivalent to 16 km/h) (step S15), the 'zero' display is maintained even when the pulse signal is inputted from the vehicle speed sensor 21 (step S16), to thereby prevent wrong display of the speedometer 32 caused by racing of the engine. Furthermore, when the transmission 52 is switched from the neutral state to an in-gear state, the 'zero' display of the speedometer 32 is maintained as long as a prescribed time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an instrument display device applied to a vehicle such as a motorcycle, and in particular, the display of a digital speedometer changes by emptying the engine even though the actual vehicle speed is zero. The present invention relates to an instrument display device that can prevent this.

  Conventionally, an instrument display device that detects a rotational speed of a predetermined gear of a transmission with a non-contact type vehicle speed sensor and displays a vehicle speed obtained from a signal of the vehicle speed sensor on a digital display type speedometer. Are known. However, a vehicle speed sensor that detects the rotation of a predetermined gear of the transmission may input a signal that is not a signal that detects a normal traveling state. Therefore, based on such a signal, the actual vehicle speed is It was necessary to prevent different vehicle speeds from being displayed.

Patent Document 1 discloses an instrument that maintains the display of the speedometer at “0” for a predetermined time when the transmission is switched from the neutral state to the in-gear state when the vehicle speed is zero, that is, when the vehicle is stopped. A display device is disclosed. According to such a configuration, a number other than “0” is displayed on the speedometer due to a shock at the time of shifting transmitted to the predetermined gear as described above, even though the actual vehicle speed is zero. Can be prevented.
JP 2006-98092 A

  However, the technique disclosed in Patent Document 1 has a problem that it cannot cope with a case where a signal is input from a vehicle speed sensor due to vibration generated by engine run-off being transmitted to a predetermined gear of the transmission.

  An object of the present invention is to solve the above-described problems of the prior art and to prevent the display of the digital speedometer from changing by emptying the engine even though the actual vehicle speed is zero It is to provide a display device.

  In order to achieve the above-described object, the present invention provides an instrument display device including a speedometer that digitally displays a vehicle speed based on a signal from a vehicle speed sensor, wherein the speedometer displays “0” for a predetermined time or more. If the transmission is in a neutral state and the engine speed is greater than or equal to a predetermined value, the speedometer displays “0” regardless of the signal input from the vehicle speed sensor. There is one feature.

  Further, in an instrument display device having a speedometer that digitally displays the speed of a vehicle based on a signal from a vehicle speed sensor, “0” display of the speedometer continues for a predetermined time or more, and the transmission is in a neutral state. Furthermore, when the engine speed is equal to or higher than a predetermined value, the second feature is that the display of “0” of the speedometer is maintained when the signal input from the vehicle speed sensor is smaller than the predetermined value.

  A third feature is that when the transmission is switched from the neutral state to the in-gear state, the "0" display of the speedometer is maintained for a predetermined time.

  Further, the vehicle speed sensor has a fourth feature in that the rotational speed of the output shaft of the engine is detected.

  According to the first invention, when the speedometer “0” display continues for a predetermined time or more, the transmission is in the neutral state, and the engine speed is equal to or higher than the predetermined value, it is input from the vehicle speed sensor. Since the speedometer displays “0” regardless of the signal, it is possible to determine that the signal input from the vehicle speed sensor under a predetermined condition is caused by engine idling. Even though the actual vehicle speed is 0, the speedometer can be prevented from displaying a number other than “0”. In addition, this makes it possible to increase the reliability of the display of the speedometer, and to enhance the high-class feeling and commerciality of the instrument display device.

  According to the second invention, when the speedometer “0” display continues for a predetermined time or longer, the transmission is in the neutral state, and the engine speed is equal to or higher than the predetermined value, the speed sensor inputs the vehicle speed sensor. When the signal is smaller than the predetermined value, the speedometer “0” display is maintained. This prevents the speedometer from displaying numbers other than “0” even though the actual vehicle speed is zero. When a signal greater than a predetermined value is input from the vehicle speed sensor due to inertial running or the like when the transmission is in a neutral state, the speedometer is adjusted to the actual vehicle speed without maintaining “0” display. Accurate speed display can be performed.

  According to the third aspect of the invention, when the transmission is switched from the neutral state to the in-gear state, the “0” display of the speedometer is maintained for a predetermined time. In addition to the effect of preventing erroneous display, it is also possible to prevent erroneous display caused by a shift shock from the neutral state to the in-gear state.

  According to the fourth invention, since the vehicle speed sensor detects the rotational speed of the output shaft of the engine, the layout and mounting work of the vehicle speed sensor is easier than the configuration in which the vehicle speed is detected from the axle of the front wheels. become.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of an embodiment of a motorcycle to which the present invention is applied. A pair of left and right front forks 4 that rotatably support the front wheels WF are attached to the front side of the body frame 2 of the motorcycle 1 so as to be steerable by the handle 3. A fuel tank 8 and a seat 9 on which an occupant sits are attached above the body frame 2, and a seat cowl 10 is disposed on the rear side of the seat 9. Further, a front cowl 11 that rectifies traveling wind is attached to the front side of the vehicle body of the fuel tank 8, and the instrument display device according to the present invention is provided at a position covered by the front cowl 11 on the front side of the handle 3. Meter unit 30 is provided.

  An engine 5 as a drive source is disposed below the vehicle body frame 2, and the combustion gas is exhausted from the muffler 7 on the rear side of the vehicle body through the exhaust pipe 6. Further, the swing arm 12 that rotatably supports the rear wheel WR is pivotally supported by a pivot shaft 14 provided on the rear side of the vehicle body of the engine 5, and is also supported by the rear cushion 13 via a link mechanism. It is connected.

  The rotational driving force of the engine 5 is transmitted from a crankshaft (not shown) to a drive sprocket 16 attached to one end of the countershaft via a main shaft and a countershaft that is an output shaft. An endless drive chain 15 is wound around the drive sprocket 16, whereby the rotational driving force of the engine 5 is transmitted to the rear wheel WR. Note that the transmission 25 that is a constantly meshing manual 6-speed transmission has a known configuration in which the reduction ratio is selectively switched by a plurality of gear trains arranged between the main shaft and the counter shaft. Is. In the present embodiment, a non-contact type vehicle speed sensor 21 using a hall element or the like is disposed in the vicinity of the predetermined gear 20 that is rotatably supported by the counter shaft inside the engine 5. Based on the information from the vehicle speed sensor 21, the speed of the motorcycle 1 is displayed on a speedometer (see FIG. 3) provided in the meter unit 30.

  FIG. 2 is a partial cross-sectional view showing the mounting structure of the vehicle speed sensor 21. The vehicle speed sensor 21 according to the present embodiment inserts a sensor portion 22 integrally attached to a signal output connector 23 into a through hole formed in the crankcase 5a of the engine 5, thereby The front end is arranged close to the outer peripheral portion of the predetermined gear 20. The predetermined gear 20 may be a gear that is non-rotatably fitted to the countershaft, in other words, a gear that rotates at the same rotational speed as the countershaft and the drive sprocket 16 that are output shafts. Uses a 6-speed gear as the predetermined gear 20. A pulse signal output when the sensor unit 22 detects the passage of the gear teeth of the predetermined gear 20 is transmitted to the meter unit 30 via the connector 23.

  FIG. 3 is a front view of the meter unit 30 as seen from the occupant side seated on the seat 9 of the motorcycle 1. FIG. 4 is a block diagram showing the configuration of the meter unit 30 and its peripheral devices. The meter unit 30 has a configuration in which a plurality of instruments are disposed in a housing 31 formed of resin or the like. An analog display type tachometer 33 is disposed substantially at the center of the meter unit 30. The tachometer 33 is surrounded by a digital display type speedometer 32, information display panels 36L and 36R for displaying various information on a liquid crystal display, A warning light or the like that lights and flashes under a predetermined condition is provided.

  The analog display type tachometer 33 rotates the pointer 34 based on information from the crank angle sensor 50 that detects the rotation speed of the crankshaft, and indicates the current engine speed by the position indicated by the pointer 34. An operation light 35 of the anti-theft device is embedded in the dial on which the number of engine revolutions (× 1000 rpm) is displayed. The speedometer 32 above the tachometer 33 is a digital display type that displays the current vehicle speed on a 7-segment liquid crystal display based on a pulse signal input from the vehicle speed sensor 21 (see FIG. 2). The The speed display of the speedometer 32 can be arbitrarily switched between kilometer display (km / h) and mile display (mph). The display of the speedometer 32 may be a digital display using a dot matrix type liquid crystal display or the like.

  The information display panel 36 disposed on the right side of the speedometer 32 displays a bar graph type fuel gauge and a 7-segment water temperature gauge. The information display panel 36L disposed on the left side of the speedometer 32 Displays the clock and od / trip meter. In addition, operation buttons 37L and 37R are disposed below the information display panels 36L and 36R. By operating these operation buttons 37L and 37R, switching between kilometer display / mile display of the speedometer 32, Trip display switching, trip meter reset, time adjustment, etc. can be performed.

  On the right side of the tachometer 33, a hydraulic pressure warning light 38, a right side blinker operating light 39R, a headlight high beam operating light 41, and an ABS (anti-lock brake system) warning light 42 are arranged. Further, on the left side of the tachometer 33, a left-side blinker operation lamp 39L, a FI (fuel injection device) warning lamp 40, a neutral lamp 44, and an electronically controlled steering damper warning lamp 43 are arranged. The various warning lights described above are configured to light up when the corresponding auxiliary equipment is not in a normal state. The headlamp high beam operation lamp 41 is turned on when the headlight is switched to the upward beam, and the neutral lamp 44 is a shift drum (not shown) that performs a shift operation in accordance with the switching of the transmission 25 to the neutral state. When the neutral switch 51 attached to the switch or the like is turned on, it is lit.

  As shown in FIG. 4, information from the vehicle speed sensor 21, the crank angle sensor 50, the neutral switch 51, and the information processing unit 52 is input to the control unit 45 in the meter unit 30, and each instrument is supplied from the control unit 45. The display signal is transmitted to. The information processing unit 52 detects the time information for displaying on the information display panels 36L and 36R, the remaining fuel information detected by the fuel gauge, the cooling water temperature information detected by the water temperature sensor, the blinker relay, and the like. It has a role which inputs the lighting device operation information etc. to the control part 45.

  FIG. 5 is a flowchart showing a procedure of speedometer “0” display control according to the present embodiment. As described above, since the vehicle speed sensor 21 according to the present embodiment does not directly detect the rotational speed of the front wheel WF or the rear wheel WR of the motorcycle 1, the vehicle speed sensor 21 can be used even when the motorcycle 1 is stopped. 21 may receive a pulse signal. As an example, when the transmission 25 is in the neutral state, the rotation of the engine 5 is increased, that is, when the engine 5 is unloaded (no-load snap), the vibration of the engine 5 causes the A state in which the predetermined gear 20 vibrates is exemplified. When a pulse signal is input from the vehicle speed sensor 21 by this vibration, the speedometer 32 displays a number other than “0” even though the actual vehicle speed is zero. This erroneous display has a larger visual effect than when the speedometer is an analog display type. Therefore, in this embodiment, the speedometer “0” display control shown below is performed by the control unit in the meter unit 30. This is dealt with by executing at 45.

  In step S10, the predetermined time has elapsed after the speedometer 32 is displayed as “0”, and the “0” display of the speedometer 32 is 0.5 in order to determine whether or not the vehicle is reliably stopped. It is determined whether or not it has continued for more than a second. If an affirmative determination is made in step S10, in the subsequent step S11, it is determined whether or not the neutral switch 51 is on (ON), and if an affirmative determination is made, the process proceeds to step S12. If a negative determination is made in steps S10 to S11, the process proceeds to step S17, where the speedometer 32 is normally displayed, and the control is terminated. The determination in step S11 is to determine whether or not the transmission 25 is in a neutral state. Here, when the transmission 25 is not in the neutral state, that is, in the in-gear state, the control is terminated because the predetermined gear 20 vibrates due to the idling when the clutch is disengaged in the in-gear state. This is because the possibility is low. This is because even when the clutch is disengaged, a slight rotational driving force is always applied to the predetermined gear 20 by dragging the clutch plate due to the viscosity of the engine oil. In addition, engine emptying is usually performed in a neutral state, and an operation to increase the engine speed from a state where the clutch is disengaged and stopped in an in-gear state can be considered as an operation for starting. The reason.

  Returning to the flowchart, in step S12, it is determined whether the neutral switch 51 has changed from on (ON) to off (OFF), that is, whether the transmission 25 has been switched from the neutral state to the in-gear state. Then, the process proceeds to step S13. This is because the erroneous display of the speedometer 32 as described above may also occur due to a shift shock when switching from the neutral state to the in-gear state. Therefore, when an affirmative determination is made in step S12, the display of the speedometer 32 is maintained at "0" for 1 second in step S13 so as to prevent erroneous display.

  If a negative determination is made in step S12, that is, if it is determined that the transmission 25 remains in the neutral state, the process proceeds to step S14, and whether or not the output value from the crank angle sensor 50 is 5000 rpm or more. Determined. Since the output from the crank angle sensor 50 is a pulse signal, the controller 45 calculates the number of revolutions per unit time, and the pointer 34 is driven based on the calculation result. The determination value of the engine speed in step S14 is set to a value that can be assumed to be an intentional vacancy by the occupant, and can be arbitrarily changed according to the engine displacement, the number of cylinders, and the like. . If a negative determination is made in steps S12 to S14, the process proceeds to step S17, where the speedometer 32 is normally displayed, and the control is terminated.

  If an affirmative determination is made in step S14, in the subsequent step S15, it is determined whether or not the output pulse from the vehicle speed sensor 21 is less than 16 km / h (10 mph), and if an affirmative determination is made, the process proceeds to step S16. The determination in step S15 is to determine whether or not the pulse signal output from the vehicle speed sensor 21 and input to the control unit 45 is generated due to the idling of the engine 5. Therefore, if it is less than the equivalent of 16 km / h set as the predetermined value, it is determined that it is a pulse signal generated due to the vibration of flying, and the process proceeds to step S16, and on the other hand, it is equal to or higher than 16 km / h. In this case, it is determined as a pulse signal due to an idle running state on a downhill or coasting before stopping, and the process proceeds to step S17. The vehicle speed determination value set in step S15 can be arbitrarily changed.

  If an affirmative determination is made in step S15, the speedometer 32 is displayed as “0” in step S16. The control unit 45 calculates the current vehicle speed based on the pulse signal input from the vehicle speed sensor 21, the reduction ratio to the rear wheel WR, and the outer diameter of the rear wheel WR, and the calculation result is sent to the speedometer 32. Although it is configured to output sequentially, if a pulse signal is input due to engine emptying by the processing of step S16, the display of “0” on the speedometer 32 is maintained. Although the actual vehicle speed is 0, the speedometer 32 can be prevented from displaying a number other than “0”.

  In the speedometer “0” display control described above, the “0” display of the speedometer 32 is continued for 0.5 seconds or longer, the transmission 52 is in the neutral state, the engine speed is 5000 rpm or higher, and the vehicle speed sensor 21. Is less than 16 km / h, it is determined that the input pulse signal is due to emptying, and the display of “0” on the speedometer 32 is maintained. As a result, erroneous display of the speedometer 32 can be prevented, reliability of the display of the speedometer can be improved, and the high-class feeling and commerciality of the meter unit can be increased.

  It should be noted that the mounting structure and mounting position of the vehicle speed sensor, the type of display device provided in the meter unit, each predetermined value shown in the flowchart, etc. are not limited to the above-described embodiments, and various modifications can be made. It is. For example, the control unit in the meter unit can be arranged in the engine control unit, or the meter unit according to one embodiment of the present invention can be applied to a four-wheeled vehicle, an ATV, or the like.

1 is a side view of a motorcycle according to an embodiment of the present invention. It is a partial cross section figure which shows the attachment structure of a vehicle speed sensor. It is a front view of a meter unit concerning one embodiment of the present invention. It is a block diagram which shows the structure of a meter unit and its peripheral device. It is a flowchart which shows the procedure of the speedometer "0" display control which concerns on one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 21 ... Vehicle speed sensor, 30 ... Meter unit (instrument display device), 31 ... Housing, 32 ... Speedometer, 33 ... Tachometer, 36L, 36R ... Information display panel, 44 ... Neutral lamp, 45 ... Control part, 50 ... Crank Angle sensor, 51 ... Neutral switch

Claims (4)

In an instrument display device equipped with a speedometer that digitally displays the speed of a vehicle based on a signal from a vehicle speed sensor,
When the speedometer “0” display continues for a predetermined time or more, the transmission is in a neutral state, and the engine speed is equal to or higher than a predetermined value, the speed is not affected by the signal input from the vehicle speed sensor. An instrument display device characterized by maintaining a "0" display of the meter. In an instrument display device equipped with a speedometer that digitally displays the speed of a vehicle based on a signal from a vehicle speed sensor,
When the speedometer displays “0” for a predetermined time or longer, the transmission is in a neutral state, and the engine speed is equal to or higher than a predetermined value, the signal input from the vehicle speed sensor is smaller than the predetermined value. And an instrument display device that maintains the "0" display of the speedometer.   3. The instrument display device according to claim 1, wherein when the transmission is switched from a neutral state to an in-gear state, the "0" display of the speedometer is maintained for a predetermined time.   The instrument display device according to claim 1, wherein the vehicle speed sensor detects a rotational speed of an output shaft of the engine.

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