JP4010441B2 - Speed limiter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speed limiter provided with a vehicle speed limiting means for limiting a vehicle speed by limiting an injection amount so as not to exceed a predetermined target speed limit in a vehicle having an internal combustion engine equipped with an electronically controlled fuel injection device. Relates to the device.
[0002]
[Prior art]
As a speed limiter device (vehicle speed limit control device) for large vehicles, for example, in Japanese Patent Application Laid-Open No. 6-1444078, when it is detected that the vehicle speed is equal to or higher than a predetermined value, the vehicle speed is controlled by keeping the maximum engine speed low. Techniques for limiting are disclosed.
[0003]
However, in order to adjust the engine speed when downshifting in large vehicles, the clutch may be disengaged and the accelerator may be depressed. If this operation is performed while the vehicle speed limit is being executed, the maximum engine speed is kept low. Therefore, there was a problem that the rotation speed could not be adjusted well.
[0004]
In order to cope with the above problem, there is also known a technique for canceling the vehicle speed restriction when referring to the clutch signal when the vehicle speed restriction is performed and when power is not transmitted from the engine to the drive system.
However, the clutch signal is configured to detect the state in which the clutch disk is completely connected, and even when the clutch pedal is slightly depressed (for example, when it is half clutch or when it is fully depressed). The clutch disc is set to be disengaged. In such a state, the vehicle speed limit may be canceled even though the power is connected. Therefore, there is a problem that the driver can intentionally release the vehicle speed limit.
[0005]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above-described problems of the prior art. The speed limit can be temporarily canceled to adjust the rotation of the gear change, and after the clutch is completely connected, the clutch pedal is An object of the present invention is to provide a speed limiter device that enables vehicle speed limit control regardless of the amount of depression and prevents a driver from intentionally releasing the vehicle speed limit.
[0006]
[Means for Solving the Problems]
According to the present invention, an engine 2 including an electronically controlled fuel injection device 18, a clutch 4 having a clutch switch 12, a neutral switch 10 indicating a neutral position, and a transmission 16 having a vehicle speed sensor 14 is used as a vehicle speed limiter device. , An accelerator device 16 for changing the fuel injection amount according to the stroke amount of the neutral switch 10, the clutch switch 12, and the accelerator pedal, and vehicle speed limiting control means 20 for limiting the vehicle speed by a signal from the vehicle speed sensor 14, are provided. The means 20 determines whether or not the vehicle speed is equal to or lower than the speed limit based on a signal from the vehicle speed sensor 14, and if the vehicle speed is equal to or higher than the speed limit, sends a control signal to the electronically controlled fuel injection device 18 to restrict fuel supply. Output, then the shift lever enters the neutral position When the neutral position is entered, the throttle of the fuel supply of the electronically controlled fuel injection device 18 is released, and it is determined whether the clutch is engaged after the gear is engaged. If the gear is engaged and the clutch is engaged, the vehicle speed limit release is terminated. If the gear is engaged and the clutch is not engaged, the gear shift operation is performed. It has a function of determining whether or not a predetermined time has elapsed, and terminating the vehicle speed restriction release after the predetermined time has elapsed.
[0008]
According to the speed limiter device of the present invention having such a configuration, in the speed limit operation state, when it is detected that the neutral detection means (neutral switch 10) is switched from the geared state to the neutral state, the speed limit is performed. It is configured to release the gear change, and the gear change can be smoothly rotated while the speed limit is released in this way.
[0009]
Further, when the neutral detection means (neutral switch 10) detects that the gear is engaged and the clutch engagement / disengagement means (clutch switch 12) detects that the clutch is engaged after the speed limit is released, or the gear is engaged for a predetermined time or more. If it continues, the speed limit is always re-executed, so the driver intentionally releases the vehicle speed limit, that is, a state where the clutch pedal is stepped on a little (for example, a half-clutch or a state where the play is depressed). Can be maintained, and the vehicle can be prevented from continuing to run with the vehicle speed restriction released.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0011]
In FIG. 1, an engine 2 having an electronically controlled fuel injection device 18 includes a clutch 4 having a clutch switch 12 in the order of transmission of a driving force, a neutral switch 10 indicating a neutral position, and a vehicle speed sensor 14 at the rear end. The transmission 6, the propulsion shaft P, and the axle 8 are connected.
[0012]
The neutral switch 10, the clutch switch 12, the accelerator device 16 for changing the fuel injection amount according to the stroke amount of the accelerator pedal, and the vehicle speed sensor 14 are respectively set to predetermined target speed limits by input signal lines Li1 to Li4. Is connected to vehicle speed limit control means (hereinafter referred to as a control unit) 20 for limiting the vehicle speed by limiting the injection amount so as not to exceed.
[0013]
The control unit 20 is connected to the electronically controlled fuel injection device 18 by an output signal line Lo.
[0014]
Next, the control method will be described with reference to FIG.
The vehicle speed is always detected by the vehicle speed sensor 14, and in step S1, the control unit 20 determines whether or not the vehicle speed is equal to or higher than the speed limit.
[0015]
If the vehicle speed is equal to or higher than the speed limit (YES in step S1), the process proceeds to step S2 to start the speed limit. For example, even if the accelerator device (hereinafter referred to as an accelerator pedal) is depressed and the speed is further increased, the control unit 20 A control signal is sent to the electronically controlled fuel injection device 18 via the output signal line Lo so as to throttle the fuel supply so that the vehicle speed does not exceed the speed limit, and the process proceeds to the next step S3.
[0016]
If the vehicle speed is equal to or lower than the speed limit (NO in step S1), the control returns to the original and the above-described control is repeated again.
[0017]
In step S3, the control unit 20 operates a shift lever (not shown) and determines whether or not the gear is engaged (position) from the neutral position (position). In other words, the neutral switch 10 must be operated so that the shift lever passes through the neutral position when the driver shifts down to increase the speed. Detection of such a shift down operation is detected in step S3. Is going.
[0018]
If the gear enters the neutral position (position) (YES in step S3), the process proceeds to the next step S4. If the gear does not enter the neutral position (NO in step S3) ), The control returns to the original, and the above-described control is repeated again.
[0019]
In step S4, the control unit 20 releases the throttle of the fuel supply of the electronically controlled fuel injection device 18 so that the engine can be blown up when the accelerator pedal is depressed, for example, until the next step S5. It is also possible to shift down to pass a slow vehicle ahead and depress the accelerator pedal (accelerator device) to accelerate and complete the overtaking.
[0020]
In step S5, the control unit 20 determines whether or not the gear is engaged and the clutch is engaged.
[0021]
If the gear is engaged and the clutch is engaged (YES in step S5), the process proceeds to step S8. If the gear is not engaged and the clutch is disengaged (NO in step S5), the process proceeds to step S6. move on.
[0022]
In step S6, the driver performs a shift operation with a shift lever (not shown), and proceeds to step S7.
[0023]
In step S7, the control unit 20 determines whether or not a predetermined time has elapsed since the gear was engaged by the neutral switch 10, and if the predetermined time has not yet elapsed (NO in step S7), the control unit 20 returns to step S5. If the predetermined time has elapsed (YES in step S7), the process proceeds to step S8.
[0024]
In step S8, the control unit 20 ends the speed limit release. That is, for example, when the accelerator pedal (accelerator device) 16 is depressed so as to exceed the speed limit, a control signal is sent to the electronic fuel injection device 18 so as to throttle the fuel supply via the output signal line Lo. To start speed limit again.
And control returns to step S1 and repeats the above-mentioned control process.
[0025]
According to the vehicle speed limit control device according to the embodiment of FIGS. 1 and 2 having such a configuration, when it is detected that the neutral switch 10 is switched from the geared position to the neutral position in the speed limit operating state. It is configured to release the speed limit, and the gear change is performed while the speed limit is released in this way, so that the rotation can be smoothly aligned during the gear change.
[0026]
Also, when the neutral detection means (neutral switch 10) detects that the gear is engaged (position) and the clutch switch 12 detects that the clutch is engaged after the speed limit is released, or when the gear engaged state continues for a predetermined time or more. Since the speed limit is always re-applied, the driver deliberately releases the vehicle speed limit, that is, a state where the clutch pedal is depressed a little (for example, a state where the clutch is half-clutch, or a state where the pedal is depressed for play). It is possible to prevent the vehicle from continuing to travel while maintaining the vehicle speed limit.
[0027]
In addition, the above-described effects can be obtained only by rewriting the software without adding new hardware or adding a few sensors to the conventional electronic fuel injection device.
[0028]
【The invention's effect】
The effects of the present invention are listed below.
(1) It is configured to release the speed limit when it is detected that the neutral detection means has switched from the gear position to the neutral position in the speed limit operating state. Since the gear change is performed during this time, the rotation can be adjusted smoothly during the gear change.
(2) When the neutral detection means detects that the gear is engaged and the clutch engagement / disconnection confirmation means detects clutch engagement after the speed limit is released, or when the gear engagement state continues for a predetermined time or more, that is, at the time of shifting Since the speed limit is always re-performed during normal driving in a state where power is transmitted to the transmission side except for the driver, it is possible to prevent the driver from intentionally releasing the vehicle speed limit.
(3) The above-described effects can be obtained only by rewriting the software without adding new hardware to the conventional electronic fuel injection apparatus or adding a few sensors.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the configuration of a vehicle speed limit control device according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a flow of control by the vehicle speed limit control device according to the embodiment of the present invention.
[Explanation of symbols]
2 ... Engine 4 ... Clutch 6 ... Transmission 8 ... Axle 10 ... Neutral switch 12 ... Clutch switch 14 ... Vehicle speed sensor 16 ... Accelerator device 18 ... Injection pump 20 ... Control units Li1-Li4 ... Input signal line Lo ... Output signal line

Claims (1)

  An engine having an electronically controlled fuel injection device (18), a clutch (4) having a clutch switch (12), a neutral switch (10) indicating a neutral position, and a transmission (16) having a vehicle speed sensor (14) ( 2) In a vehicle speed limiter device, a signal from an accelerator device (16) and a vehicle speed sensor (14) that changes the fuel injection amount according to the stroke amount of the neutral switch (10), the clutch switch (12) and the accelerator pedal. A vehicle speed restriction control means (20) for restricting the vehicle speed is provided, and the vehicle speed restriction control means (20) determines whether the vehicle speed is equal to or lower than the speed limit based on a signal from the vehicle speed sensor (14). If it is above the speed, it outputs a control signal to throttle the fuel supply to the electronically controlled fuel injector (18). Next, it is determined whether or not the shift lever has entered the neutral position. When the shift lever has entered the neutral position, the throttle of the fuel supply of the electronically controlled fuel injection device (18) is released, and the clutch is engaged after the gear is engaged. If the gear is engaged and the clutch is engaged, the vehicle speed limit release is terminated, and if the gear is engaged and the clutch is not engaged, the gear shift operation is performed. The speed limiter device has a function of determining whether or not a predetermined time has elapsed from the gear-engaged state and terminating the release of the vehicle speed restriction after the predetermined time has elapsed.

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