JP5814994B2 - Motorcycle lighting equipment - Google Patents

Description

  The present invention relates to a motorcycle lighting device, and more particularly, to a motorcycle lighting device capable of determining on / off of a headlight switch.

  2. Description of the Related Art Conventionally, there is known a vehicle lighting device that allows an ECU to determine whether a headlight switch is on or off.

  In Patent Literature 1, in a headlight switch of a headlight that is lit with a direct current, a direct current applied to the headlight switch is input to an A / D input port of an ECU (CPU), and this A / D input port is A configuration is disclosed in which the on / off state of the headlight switch is determined based on the H level or the L level.

JP 2009-259622 A

  However, in the technique described in Patent Document 1, when the current applied to the headlight switch is alternating current in a headlight that is lit with alternating current, alternating current cannot be directly input to the A / D input port of the ECU. Therefore, it is impossible to determine the state of the headlight switch.

  In this case, adding a configuration for converting the alternating current applied to the headlight switch to direct current increases the cost, and also converts the alternating current into a digital format (pulse signal) so that the ECU can easily process the alternating current. In the conversion method, the state determination of the headlight switch is performed every time a pulse signal is input, and there is a problem that a task that the ECU should originally perform may be delayed.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art, and to determine the state of a headlight switch to which an alternating current is applied, and to reduce the burden on the control unit while suppressing an increase in cost. Is to provide.

  In order to achieve the above object, the present invention provides a generator (2) that generates electric power by rotating an engine (1) and a half-wave current that supplies an alternating current of the generator (2) to a lamp (7). A regulator unit (3) for conversion, a lamp switch (6) interposed between the regulator unit (3) and the lamp (7), and a control unit (8) for determining the state of the vehicle; The input circuit (10) for generating a pulse signal (Pf) synchronized with the half-wave current converted by the regulator unit (3), and the state of the pulse signal (Pf) in advance A storage unit (12) that temporarily stores at a predetermined timing (T), and a conversion pulse (Pe) in the ECU is generated based on the state of the pulse signal (Pf) stored in the storage unit (12) A conversion pulse generator (11) And, the control section (8), on the basis of the state of the ECU in the conversion pulse (Pe), is first characterized in that to determine the on-off state of the lighting device switch (6).

  Further, the control unit (8) counts the count value of the timer (13) in response to the input of the ECU internal conversion pulse (Pe), and based on the result of the count, the lamp switch (6) The second feature is that the state is determined.

  Further, the control unit (8) starts a subtraction process for decrementing the counter value of the timer (13) from the initial value (MAX) every predetermined time in response to the input of the in-ECU conversion pulse (Pe). Thereafter, when the ECU internal conversion pulse (Pe) is input again before the counter value returns to zero, a reset is performed to return the count value to the initial value (MAX). There is.

  Further, the control unit (8) does not execute the counting by the timer (13) when the pulse width (W) of the input conversion pulse (Pe) in the ECU is shorter than a predetermined value. There are four features.

  Further, the control unit (8) is configured not to reset the counter value when the ECU conversion pulse (Pe) is input within a predetermined time from turning on the power of the motorcycle. There are features.

  According to the first feature, the input circuit that generates the pulse signal synchronized with the half-wave current converted by the regulator unit, the storage unit that temporarily stores the state of the pulse signal at a predetermined timing, A conversion pulse generation unit that generates an in-ECU conversion pulse based on the state of the pulse signal stored in the unit, and the control unit determines the on / off state of the lamp switch based on the state of the in-ECU conversion pulse Therefore, by detecting the state of the pulse signal, it is possible to determine the state of the lamp switch of the lamp that is lit with an alternating current. This eliminates the need for a device that converts the current applied to the lamp switch to direct current, thereby suppressing an increase in cost.

  In addition, the state of the pulse signal is temporarily stored in a storage unit such as a register, and then the control unit reads the status of the pulse signal at a predetermined timing to generate a conversion pulse in the ECU, and the conversion pulse in the ECU Since the state of the lighting device switch is determined based on this, it is possible to determine the on / off state of the lighting device switch after performing a task to be performed by the control unit, and to reduce load concentration on the control unit.

  According to the second feature, the control unit counts the count value of the timer according to the input of the conversion pulse in the ECU, and determines the state of the lighting switch based on the result of the count, so that it is synchronized with the AC waveform. The on / off state of the lamp switch can be appropriately determined based on the pulse signal thus obtained.

  According to the third feature, the control unit starts a subtraction process for decrementing the counter value of the timer every predetermined time from the initial value in response to the input of the conversion pulse in the ECU, and then the counter value returns to zero. If the conversion pulse in the ECU is input again before, a reset is executed to return the count value to the initial value. Therefore, while the lamp switch is on, the counter value returns to reset and the decrement process continues. As a result, the on state of the lamp switch can be detected. Further, when a predetermined time elapses after the lighting device switch is turned off, the counter value returns to zero, thereby detecting the off state of the lighting device switch.

  According to the fourth feature, when the pulse width of the input ECU conversion pulse is shorter than a predetermined value, the control unit does not perform counting by the timer, so when the pulse width is shorter than the predetermined value, It is possible to reduce the burden on the control unit by judging that it is due to noise.

  According to the fifth feature, the control unit does not reset the counter value when the conversion pulse in the ECU is input within a predetermined time from the power-on of the motorcycle. Thus, when starting the vehicle, it can be determined that the lamp switch is turned on.

1 is a block diagram showing an overall configuration of a motorcycle lighting device according to an embodiment of the present invention. It is a comparison figure of a generator output signal, ECU input signal, and the conversion pulse in ECU. It is a time chart which shows the flow of the state determination of a headlight switch. It is explanatory drawing of the production | generation method of the conversion pulse in ECU by the conversion pulse production | generation part. It is a flowchart which shows the procedure of the state detection process of a headlight switch. It is a subflow which shows the procedure of light extinction determination. It is a subflow which shows the procedure of lighting determination.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a motorcycle lighting device according to an embodiment of the present invention. The generator 2 is an AC generator that generates electric power required by the motorcycle by rotating synchronously with the crankshaft of the engine 1 of the motorcycle. The alternating current generated by the generator 2 is input to the input unit 4 of the regulator unit 3 that performs rectification processing. The alternating current input to the input unit 3 is divided into a negative half-wave current supplied to a headlight 7 as a lighting device and a positive half-wave current used for charging an in-vehicle battery (not shown). . Then, the negative half-wave current output from the output unit 5 is supplied to the headlight 7 via the headlight switch 6 (lighting device switch). The headlight 7 can be composed of, for example, a 35 W position light bulb and a 35 W high / low bulb.

  The ECU 8 as the control unit includes an A / D input port 9, an input circuit 10 that converts a half-wave current input to the A / D input port 9 into a rectangular wave (ECU detection pulse Pf), and an input circuit 10. Based on the generated ECU detection pulse signal Pf, a conversion pulse generation unit 11 that generates an in-ECU conversion pulse Pe for determining on / off of the headlight switch, a storage unit 12 including a storage element such as a register, and a predetermined time Includes a timer 13 for measuring the on / off state, and a switch state detecting means 14 for detecting the on / off state of the headlight switch 6. The input circuit 10 can be constituted by a well-known analog circuit including a Zener diode, a comparator, and a resistor as shown in the figure.

  In the input circuit 10 according to the present embodiment, the voltage (Vcc · R2 / (R1 + R2)) obtained by dividing the voltage Vcc by the voltage dividing resistors R1 and R2 with respect to the inverting input terminal of the operational amplifier (op amp) is the reference value (Ref. ) And a voltage passing through the Zener diode is applied to one non-inverting input terminal.

  In this case, the input circuit 10 is used as a comparator, and outputs a High (for example, 5 V) signal when the voltage input to the non-inverting input terminal is higher than the voltage Ref input to the inverting input terminal. Otherwise, it is configured to output a Low (for example, 0 V) signal.

  FIG. 2 is a comparison diagram of a generator output signal, an ECU input signal, and a conversion pulse in the ECU. The “generator output signal” of the alternating current generated by the generator 2 is a sine wave having the same positive and negative amplitude as shown in the upper part of the graph. On the other hand, the “ECU input signal” after the rectification process in the regulator unit 3 is a negative half-wave whose voltage becomes zero at times t1 and t3 in synchronization with the sine wave in the upper part of the graph, as shown in the middle part of the graph. It becomes a waveform. That is, half-wave rectification is generated at the zero cross point of the generator output signal.

  In contrast, the “in-ECU conversion pulse Pe”, which is generated by the conversion pulse generation unit 11 and is a pulse signal for detecting the on / off state of the headlight switch 6, is after the time t1 when the half-wave waveform swings to the negative side. The pulse signal rises to voltage V1 at time t2 and falls to zero after time t4 after time t3 when the half-wave waveform returns to zero. In other words, the “in-ECU conversion pulse Pe” is generated at a timing that is always slightly delayed from the half-wave waveform, while the pulse width W is substantially the same as the length of the times t1 to t2. A method for generating the “in-ECU conversion pulse Pe” will be described later.

  FIG. 3 is a time chart showing a flow of state determination of the headlight switch. In this time chart, the switch determination value (0, 1, 2) by the switch state detection means 14, the in-ECU conversion pulse Pe (H, L) shown in FIG. MAX) state.

  In the motorcycle lighting device according to the present invention, the state of the headlight switch 6 is obtained by combining the state of the conversion pulse Pe in the ECU and the timer count in which the counter value is subtracted from the predetermined MAX value as time elapses. Make a decision. If DC power is input to the A / D input port, the state of the headlight switch can be determined based on the fact that the H level or L level is maintained. However, in the pulse waveform based on the AC current, This is because the H level and the L level are alternately repeated, and determination by the same method cannot be performed.

  First, when the main switch (power switch) of the vehicle is turned on at time t1, counting of the “lighting determination timer A”, that is, decrement from the MAX value is started from the reset state. At this time, the setting of the switch determination value is at “0 (zero)” indicating the initial time, and is continued until the lighting determination timer A becomes zero regardless of the input of the in-ECU conversion pulse Pe. According to this setting, for example, even when an engine start by pushing is attempted immediately after the main switch is turned on, the switch determination value is not changed by the generator output based on this pushing, and the headlight switch Can be determined to be in the lighting state.

  Next, at time t2, the lighting determination timer A becomes zero, and the falling signal of the conversion pulse Pe in the ECU is input (change from H level to L level), so that the switch determination value is changed from 0 to 1. Switch. In response to this, the switch state detection means 14 detects the lighting state of the headlight switch 6 and the “light-off determination timer B” is started.

  The extinction determination timer B is reset and returns to the MAX value every time the falling signal of the in-ECU conversion pulse Pe is input. In this time chart, the in-ECU conversion pulse falls at time t3 and time t4, and the turn-off determination timer B is reset accordingly. In other words, as long as the pulse signal generated because the headlight switch 6 is turned on is inputted, the subtraction and reset of the extinction judgment timer B are repeated, and the switch judgment value is maintained at 1. .

  Then, after the time t4, the headlight switch 6 is turned off so that the conversion pulse in the ECU is not input. Then, the turn-off determination timer B has no opportunity to be reset and becomes zero at time t5. The switch state detection unit 14 switches the switch determination value from 1 to 2 with the turn-off determination timer B returning to zero as a trigger, and detects that the headlight switch 6 is turned off.

  When the headlight switch 6 is turned on after the initial state is finished, the control unit 24 sets the extinction determination timer B using the input of the ECU internal conversion pulse Pe as a trigger. Start, but if the pulse width W is shorter than a predetermined value (for example, 1 μs or less), this is judged as electric noise, and the counter value is not counted or reset, affecting the state determination of the headlight switch. Not to give.

  FIG. 4 is an explanatory diagram of a method for generating the in-ECU conversion pulse Pe by the conversion pulse generation unit 11. In this figure, the ECU detection pulse Pf converted by the input circuit 10 (see FIG. 2), the timer processing timing T, and the in-ECU conversion pulse Pe generated by the conversion pulse generator 11 are shown in order from the top.

  The ECU 8 originally processes a task for controlling the fuel injection device, the ignition device, and the like based on various sensor signals. For this reason, for example, if it is attempted to execute the count process every time a falling pulse of the ECU detection pulse Pf is input, there is a possibility that it interferes with the execution timing of other tasks and affects other tasks.

  Therefore, in the present invention, the fact that the falling signal of the ECU detection pulse Pf has been input (changed from the H level to the L level) is stored in the storage unit 12 including a register or the like, and predetermined during a series of tasks. When the timer processing timing T secured at the given timing arrives, the state of the ECU detection pulse Pf is read from the storage unit 12 to generate the in-ECU conversion pulse Pe, thereby executing other tasks. So that it does not affect Note that the timing shift between the ECU input signal and the ECU detection pulse Pf shown in FIG. 2 is caused by this series of processes.

  Hereinafter, the procedure of the headlight switch state detection process will be confirmed with reference to FIGS. FIG. 5 is a flowchart showing a procedure of “AC load signal reception process” in which the ECU 8 performs the headlight switch state detection process based on the alternating current. In step S1, it is determined whether or not the headlight 7 is turned on. If an affirmative determination is made, the process proceeds to step S2 where a light extinction determination is performed. On the other hand, if a negative determination is made in step S1, the process proceeds to step S3 and a lighting determination is executed.

  FIG. 6 is a sub-flow showing a procedure for turning off the light in step S2 of FIG. In step S10, it is determined whether or not the ECU internal conversion pulse Pe has fallen. If an affirmative determination is made in step S10, the process proceeds to step S11, and the extinction determination timer B is reset. In step S12, in response to the reset of the extinction determination timer B, it is determined that the headlight switch is on and the headlight is on. On the other hand, if a negative determination is made in step S10, the process proceeds to step S13 in the figure to determine whether or not the extinction determination timer B has expired (becomes zero). If an affirmative determination is made in step S13, it is determined that the headlight switch is in an off state and the headlight is in an extinguished state. If a negative determination is made in step S13, the series of control is terminated and the process returns to the main flow in FIG.

  FIG. 7 is a subflow showing the procedure of lighting determination in step S3 of FIG. In step S20, it is determined whether or not the ECU internal conversion pulse Pe has fallen. If an affirmative determination is made in step S20, the process proceeds to step S21 to determine whether or not the lighting determination timer A has expired. If an affirmative determination is made in step S21, that is, it is determined that the lighting determination timer A has expired, the process proceeds to step S22, and the headlight state is determined to be lighted. On the other hand, if a negative determination is made in step S20, the process proceeds to step S23, the extinction determination timer B is reset, the headlight state is determined to be extinguished in step S24, and the process returns to the main flow in FIG.

  The form of the vehicle, the configuration of the engine and generator, the configuration of the regulator unit, the shape and structure of the headlight and headlight switch, the input circuit in the control unit, the conversion pulse generation unit, the storage unit, the timer, and the switch state detection means The structure, the setting of the timer processing timing, the setting of the MAX value at the time of timer reset, etc. are not limited to the above embodiment, and various changes can be made. For example, the intra-ECU conversion pulse may be generated with reference to the rising edge of the ECU detection pulse. The state detection method of the lighting device switch according to the present invention is not limited to a motorcycle, and can be applied to various vehicles that turn on a headlight with an alternating current.

  DESCRIPTION OF SYMBOLS 1 ... Engine, 2 ... Generator, 3 ... Regulator part, 6 ... Headlight switch (lighting device switch), 7 ... Headlight (lighting device), 9 ... A / D input port, 10 ... Input circuit, 11 ... Conversion Pulse generation unit, 12 ... storage unit, 13 ... timer, A ... lighting determination timer, B ... extinction determination timer, T ... timer processing timing, Pf ... ECU detection pulse, Pe ... conversion pulse in ECU

Claims (2)

A generator (2) that generates electricity by rotation of the engine (1), a regulator unit (3) that converts an alternating current of the generator (2) into a half-wave current that is supplied to a lamp (7), and the regulator unit (2) In a lighting device for a motorcycle having a lighting device switch (6) interposed between the lighting device (7) and a control unit (8) for determining the state of the vehicle,
An input circuit (10) for generating a pulse signal (Pf) synchronized with the half-wave current converted by the regulator unit (3);
A storage unit (12) for temporarily storing the state of the pulse signal (Pf);
A conversion pulse generator (11) for generating an in-ECU conversion pulse (Pe) based on the state of the pulse signal (Pf) stored in the storage unit (12),
The controller (8) determines the on / off state of the lamp switch (6) based on the state of the ECU internal conversion pulse (Pe),
The control unit (8) secures a predetermined timer processing timing (T) during a series of tasks including at least control of a fuel injection device and an ignition device of a vehicle,
The conversion pulse generation unit (11) outputs the state of the pulse signal (Pf) temporarily stored in the storage unit (12) when the timer processing timing (T) arrives. An in-ECU conversion pulse (Pe) is generated ,
The control unit (8) counts the count value of the timer (13) in response to the input of the in-ECU conversion pulse (Pe), and determines the state of the lamp switch (6) based on the count result. It includes a turn-off determination timer (B) for determining,
The extinction determination timer (B) determines that the lamp switch (6) is in an on state in response to the input of the ECU internal conversion pulse (Pe), and sets the counter value of the timer (13) to an initial value. (MAX) starts a subtraction process for decrementing every predetermined time, and then when the ECU conversion pulse (Pe) is input again before the counter value returns to zero, the count value is set to the initial value. While executing the reset to return to (MAX), when the counter value returns to zero, it is determined that the lamp switch (6) is in the off state,
The controller (8) is a lighting determination set so as not to reset the counter value when the in-ECU conversion pulse (Pe) is input within a predetermined time from turning on the power of the motorcycle. With a timer (A),
The motorcycle lighting device, wherein the turn-off determination timer (B) is started in response to the end of the turn-on determination timer (A) . The control unit (8) does not execute the counting by the timer (13) when the pulse width (W) of the input conversion pulse (Pe) in the ECU is shorter than a predetermined value. The motorcycle lighting device according to claim 1 .