JP2004270527A - Engine control unit for two-wheel vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine control unit for a two-wheel vehicle in which an engine can be easily started even in the case when an anti-theft device fails to function normally caused by reduced battery power. <P>SOLUTION: After the engine 1 is started, operation of the engine 1 is controlled by an ECU 8. After an elapse of a predetermined time, anti-theft signals are read from the anti-theft device 7 to the ECU 8 to conduct an authentication treatment. When the procedure is certified, operation control of the engine 1 is continued, while when it fails to be certified, the operation control of the engine 1 is stopped. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a motorcycle engine control unit having an anti-theft function.
[0002]
[Prior art]
Conventionally, as this kind of technology, for example, a technology described in the following document is known (see Patent Document 1 or Patent Document 2). According to the technology described in Patent Document 1, in a motorcycle anti-theft device, an anti-theft switch that operates mechanically in conjunction with a main switch, a resistor connected in parallel to the anti-theft switch, And a resistor connected between the power supply and the power supply, and only when power is supplied to each circuit by the main switch, the anti-theft switch is operated and the voltage dividing circuit composed of the two resistors is used. The obtained divided voltage is input to the microcomputer of the ignition device unit. Only when the divided voltage input to the microcomputer satisfies a certain reference range, it is determined that the engine has been normally operated and normal engine control is performed.
[0003]
On the other hand, in the technology described in Patent Document 2, when the main switch is turned on in the vehicle anti-theft device, the ignition unit that controls the ignition of the engine uses the ID of the inserted main key by communication between the antenna and the transponder. Is read and compared with the already registered ID. If the ID of the inserted key does not match the registered ID as a result of the comparison, an alarm process is performed to prevent theft.
[0004]
[Patent Document 1]
Japanese Utility Model Application Laid-Open No. 6-53771 [0005]
[Patent Document 2]
JP-A-2002-37028
[Problems to be solved by the invention]
As described above, in the technology disclosed in Patent Document 1, when the power of the battery is reduced and the anti-theft device does not function properly, the voltage dividing circuit that satisfies the specific reference range, which is a voltage dividing circuit, is used. Voltage may not be obtained. In such a case, even if an attempt is made to start the engine by, for example, a kick starter, there is a possibility that a signal for permitting ignition control of the engine is not provided to the microcomputer of the ignition device unit. As a result, the engine is difficult to start, and in the worst case, the engine cannot be started.
[0007]
On the other hand, in the technique disclosed in Patent Document 2, when the power of the battery is reduced and sufficient power is not supplied to the ignition unit, the anti-theft function of the ignition unit does not operate normally and the ID of the ID is not detected. There is a possibility that the collation processing cannot be performed. As a result, as described above, there have been disadvantages in that the engine becomes difficult to start, and in the worst case, the engine cannot be started.
[0008]
Therefore, the present invention has been made in view of the above, and it is an object of the present invention to easily start the engine even when the battery power is reduced and the anti-theft device does not function normally. It is an object of the present invention to provide an engine control unit for a motorcycle.
[0009]
It is another object of the present invention to provide a motorcycle engine control unit that can add an anti-theft function to a battery-less motorcycle system.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 includes an authentication unit that reads an anti-theft signal after the engine is started, performs authentication processing of the read anti-theft signal, and starts the engine by controlling the driving of the engine. Later, when the read anti-theft signal is authenticated, the control means for continuously performing the drive control of the engine which has been performed up to that time, and when not being authenticated, cancels the drive control of the engine which has been performed so far. And characterized in that:
[0011]
In the above configuration, after the start of the engine, the control means controls the drive of the engine. After a predetermined time has elapsed, the anti-theft signal is read and the authentication process is performed. If the authentication is successful, the drive control of the engine is continued. If it is not authenticated, the drive control of the engine is stopped.
[0012]
Thus, according to the first aspect of the present invention, even when the power supply cannot be received and the anti-theft device does not function normally, the engine can be easily started by the kick starter. In addition, since the anti-theft signal is read after a predetermined time has elapsed since the engine was started, reading error of the anti-theft signal can be prevented, and the authentication process can be performed reliably.
[0013]
According to a second aspect of the present invention, in the first aspect of the present invention, after the engine is started, a detecting means for detecting whether or not the number of revolutions of the engine and the vehicle speed are equal to or lower than a predetermined specified value, Before the anti-theft signal is read, if the detection means detects that the engine speed is not less than the specified value or that the vehicle speed is not less than the specified value, the control means performs the operation up to that time. It is characterized in that the drive control of the engine that has been stopped is stopped.
[0014]
In the above configuration, before the anti-theft signal is read, if the detection means detects that the engine speed is not less than the specified value, or if the vehicle speed is detected not to be less than the specified value, the control means To stop the driving control of the engine.
[0015]
Thus, according to the second aspect of the present invention, even if the engine is started before the authentication processing of the anti-theft signal is performed, it is possible to prevent the motorcycle from running illegally and prevent theft.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a diagram showing a configuration around an engine control including an engine control unit for a motorcycle according to an embodiment of the present invention.
[0018]
In FIG. 1, an engine 1, an electric starter 2, a kick starter 3, an alternator 4, a battery 5, a main switch (SW) are shown around the engine control including the engine control unit (ECU) for a motorcycle according to this embodiment. 6, an anti-theft device 7 and an ECU (engine control unit) 8.
[0019]
The engine 1 is started by power supplied from the electric starter 2 or the kick starter 3 and is driven and controlled based on a control signal supplied from the ECU 8. After the engine 1 is started, its power is given to the alternator 4, and drive information of the engine 1 such as the number of revolutions is given to the ECU 8 and used for drive control of the engine 1.
[0020]
The electric starter 2 is a starting device that is supplied with electric power from the battery 5 and starts the engine 1 electrically. When the electric starter 2 is started, a starter signal is given to the ECU 8.
[0021]
The kick starter 3 is a starting device that allows the user to step down on the starter lever with his / her foot, transmit the torque of the starter to the crankshaft, and start the engine 1 directly. The power generated when the starter lever of the kick starter 3 is stepped down with a foot is given to the alternator 4. Further, when the kick starter 3 is activated, a starter signal is given to the ECU 8.
[0022]
The alternator 4 is an AC generator that generates AC power using the power generated by the engine 1 or the power generated by the kick starter 3 and converts the generated AC power into DC power. The DC power obtained by the alternator 4 is supplied to the battery 5.
[0023]
Battery 5 is charged by DC power supplied from alternator 4. The DC power stored in the battery 5 is supplied to the engine 1, the electric starter 2, the anti-theft device 7, and the ECU 8 via the main switch 6.
[0024]
The main switch 6 controls the supply of electric power from the battery 5 to the engine 1, the electric starter 2, the anti-theft device 7 and the ECU 8, and controls the engine by the ECU 8, the start of the engine 1 by the electric starter 2, and the operation of the anti-theft device 7. This is a switch for starting control.
[0025]
The anti-theft device 7 is a device that prevents the motorcycle from being stolen, operates by being supplied with power from the battery 5, and provides a preset anti-theft signal to the ECU 8.
[0026]
The ECU 8 includes an authentication unit that performs authentication processing of the anti-theft signal, and a control unit that determines whether to continue or stop driving the engine based on the result of the authentication processing. Further, after the engine 1 is started, a detection unit is provided for detecting whether or not the number of revolutions of the engine 1 and the vehicle speed are equal to or less than a predetermined specified value. The ECU 8 operates by being supplied with electric power from the battery 5 and is configured by a microcomputer that performs an operation process based on a program. The ECU 8 serves as a control center for controlling the driving of the engine. Based on this, the functions of the authentication unit, the control unit, and the detection unit are realized.
[0027]
When the main switch 6 is turned on and electric power is supplied from the battery 5 to the electric starter, the electric starter 2 is started, and when the engine 1 is started by the electric starter 2, the ECU 8 starts drive control of the engine 1. When the preset specified time has elapsed after the engine 1 is started, the anti-theft signal is read from the anti-theft device 7 and the anti-theft signal is authenticated. If the read anti-theft signal is verified to be a legitimate signal, the engine control is continued, and if not, the engine control is stopped.
[0028]
On the other hand, when the electric power of the battery 5 decreases, the ECU 8 cannot receive sufficient electric power from the battery 5 because the electric starter 2 and the antitheft device 7 and the ECU 8 cannot receive sufficient electric power from the battery 5. 2. If the anti-theft device 7 and the ECU 8 do not function, and the engine 1 is started by the kick starter 3, the anti-theft signal is read from the anti-theft device 7 to perform the authentication process before the engine 1 is started. Drive control is performed.
[0029]
In such a case, after a predetermined time has elapsed after the engine 1 is started, the ECU 8 charges the battery 5 with the electric power obtained by the alternator 4 and stably supplies the electric power from the battery 5 to the anti-theft device 7. After being supplied to the ECU 8, the anti-theft signal is read, the above-described authentication processing is performed, and it is determined whether or not to continue the drive control of the engine 1.
[0030]
When the drive control of the engine 1 is performed before the authentication process is performed, the ECU 8 determines whether the drive control of the engine 1 is to be continuously performed based on the result of the above-described authentication process. After a predetermined time has elapsed after the start of the engine 1, the rotation speed of the engine 1 and the vehicle speed from a vehicle speed sensor (not shown) are read from the engine 1, and the rotation speed and the vehicle speed of the engine 1 are set in advance. If it is equal to or less than the specified value, the drive control of the engine 1 that has been performed until then is continuously performed. On the other hand, when the rotation speed or the vehicle speed of the engine 1 is not lower than the predetermined value, the drive control of the engine 1 is stopped.
[0031]
If the anti-theft signal is not supplied from the anti-theft device 7 to the ECU 8 after the engine 1 is started, even if the preset anti-theft signal has elapsed after the engine 1 is started, the drive control of the engine 1 is stopped.
[0032]
Next, the operation of this embodiment in the above configuration will be described with reference to the flowchart shown in FIG. 2 showing the procedure of drive control of the engine 1 by the ECU 8.
[0033]
First, the main switch 6 is turned on (step S200). When the power is sufficiently stored in the battery 5, the power is supplied from the battery 5 to the engine 1, the electric starter 2, and the ECU 8 via the main switch 6. , The electric starter 2 is driven (step S201). As a result, the engine 1 is started, and the drive control of the engine 1 is performed by the ECU 8 (step S202).
[0034]
On the other hand, when the electric power is not sufficiently accumulated in the battery 5 and the electric starter 2 cannot be driven by the electric power of the battery 5, the kick starter 3 is driven by the user (step S201), and the power obtained by the kick starter 3 is obtained. To start the engine 1, and the ECU 8 controls the drive of the engine 1 (step S202).
[0035]
After the start of the engine 1 and the drive control, it is determined whether or not a predetermined time (for example, a time of about several ms) has elapsed (step S203). Then, it is determined whether or not the rotation speed of the engine 1 is equal to or less than a predetermined value (step S204). If the determination result indicates that the rotation speed of the engine 1 is equal to or less than the specified value, then it is determined whether the vehicle speed is equal to or less than a predetermined value (step S205). If the result of determination in step S203 is that the specified time has not elapsed, the processing of step S205 is performed.
[0036]
If the result of determination in step S205 is that the vehicle speed is equal to or lower than the prescribed value, it is next determined whether an anti-theft signal has been read into the ECU 8 from the anti-theft device 7 (step S206). If the anti-theft signal is read by the ECU 8, an authentication process is performed to determine whether or not the anti-theft signal read by the ECU 8 is a legitimate signal (step S207). If the signal is confirmed and authenticated, the drive control of the engine 1 which has been performed until then is continuously performed (step S208).
[0037]
On the other hand, if the result of the determination in step S207 is that the anti-theft signal read by the ECU 8 is not confirmed to be a legitimate signal and is not authenticated, it is determined that the engine 1 has been started illegally, The drive control of the engine 1 that has been performed is stopped (step S209).
[0038]
If the anti-theft signal has not been read into the ECU 8 in the determination processing in step S206, it is determined whether or not a predetermined time period has elapsed after the engine 1 was started (step S210). As a result of the determination, if the specified time has not elapsed, the process proceeds to step S203. If the specified time has elapsed, the anti-theft signal has not been read into the ECU 8, so that the engine 1 is illegally operated. It is determined that the engine has been started, and the drive control of the engine 1 that has been performed so far is stopped (step S209).
[0039]
On the other hand, in the determination process of step S203, when the rotation speed of the engine 1 is not less than the predetermined value, that is, when the rotation speed of the engine 1 is stabilized after the engine 1 is started, the rotation speed of the engine 1 If the value is equal to or greater than the value, it is determined that the motorcycle is about to be moved illegally, and the drive control of the engine 1 that has been performed up to that point is stopped (step S209). Further, in the determination processing of step S204, when the vehicle speed is not lower than the preset specified value, it is determined that the motorcycle is about to be illegally moved, and the drive control of the engine 1 that has been performed up to that point is stopped ( Step S209).
[0040]
As described above, in the above embodiment, even when the power of the battery 5 is reduced, the engine 1 cannot be started by the electric starter 2, and the ECU 8 and the anti-theft device 7 do not function normally, The engine 1 is started, the alternator 4 is started, the electric power obtained by the alternator is supplied to the battery 5, the battery 5 is charged, and the electric power is stably supplied from the battery 5 to the anti-theft device 7 and the ECU 8, so that the theft is obtained. After the anti-theft device 7 and the ECU 8 function normally, the authentication process of the anti-theft signal is performed. As a result, unlike the prior art, the authentication processing of the anti-theft signal is not performed in parallel with the start of the engine 1, so that the power of the battery 5 is reduced, and the anti-theft device 7 functions normally when the engine 1 starts. Even if not, the engine 1 can be easily started by the kick starter 3.
[0041]
Further, after the engine 1 is started, after the power is stably supplied from the battery 5 to the anti-theft device 7 and the ECU 8, the anti-theft signal is read from the anti-theft device 7 to the ECU 8. A reading error at the time of a voltage change can be prevented, and the authentication process can be performed reliably.
[0042]
Further, after a predetermined time has elapsed since the start of the engine 1, if the rotation speed and the vehicle speed of the engine are not below the specified values, the drive control of the engine 1 which has been performed so far is stopped. Even if the engine 1 is started before the authentication processing of the anti-theft signal is performed, it is possible to prevent the motorcycle from running illegally, thereby preventing theft.
[0043]
In the embodiment, when the engine 1 is started by the kick starter 3, if the accelerator opening is too wide, the engine 1 may stop immediately after the engine 1 starts. An accelerator lock mechanism may be provided so as not to become too large. Thus, malfunction of the engine 1 can be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration around an engine control including an engine control unit for a motorcycle according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a procedure of engine drive control.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Electric starter 3 ... Kick starter 4 ... Alternator 5 ... Battery 6 ... Main switch 7 ... Anti-theft device 8 ... ECU

Claims (2)

After the engine has been started and a predetermined time has elapsed, an authentication unit that reads an anti-theft signal from the anti-theft device and performs an authentication process as to whether the read anti-theft signal is a legitimate signal,
When the anti-theft signal read by the authentication means is authenticated after the engine is started by the drive control of the engine, the drive control of the engine which has been performed so far is continued, and the anti-theft signal read by the authentication means is continued. A control means for stopping the drive control of the engine which has been performed if the signal is not authenticated, the engine control unit for a motorcycle. After the start of the engine, a rotation speed of the engine, as well as detection means for detecting whether the vehicle speed is equal to or less than a preset specified value,
Before the anti-theft signal is read from the anti-theft device to the authentication means, if the detection means detects that the engine speed is not less than a specified value or detects that the vehicle speed is not less than a specified value. 2. The engine control unit for a motorcycle according to claim 1, wherein the control unit stops the drive control of the engine that has been performed up to that time.

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