JP2606381B2 - Engine start state detecting device by starter and automatic starter of starter using the device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine start state detecting device using a starter and a starter start / start device using the device.

"Related art and its problems" A starter for starting an engine of a vehicle or the like, after the engine is ignited and started, retracts a pinion gear meshing with the ring gear of the engine to prevent overrun of the starter. . For this reason, it is necessary to detect the starting state of the engine. As a means for detecting the starter voltage, for example, as disclosed in Japanese Patent Publication No. 49-44682, a method for detecting a starter voltage, and as disclosed in Japanese Utility Model Publication No. 52-6737. In some cases, the ignition state of the engine is detected from the voltage generated by the alternator.

However, in the case of detecting the starting state of the engine from the starter voltage, the voltage pulsation at the time of driving the engine is large, and further, the starter voltage is greatly influenced by the capacity and charging state of the battery or the electric load state other than the starter, and the detection is not performed. There was a risk of becoming stable.

In addition, when the alternator is based on the generated voltage, there is a problem that the engine cannot be employed in an engine having no alternator.

On the other hand, Japanese Patent Publication No. 60-10187 discloses a method and an apparatus for automatically starting a starter, in which a detection signal of an engine rotation sensor is inputted to a microcomputer, and a start condition of the engine is determined according to a predetermined program. It is shown.

However, the means for determining the starting state of the engine is incorporated in a series of software for controlling the automatic starting of the engine by a computer, and is not versatile as a means for detecting the starting state of the engine. There is a problem that it cannot be applied to a non-type engine automatic starter.

"Problems to be Solved by the Invention" The present invention has been made in order to solve the above problems, and is used for a starter protection device for preventing overrun of a starter, an automatic engine start device, and the like. An object of the present invention is to provide an engine start state detecting device using a starter capable of reliably detecting a start state, and to provide an automatic starter for a starter with a simple configuration and reliable operation by using the starter. is there.

"Means for solving the problem" As specific means for achieving the above object, a voltage detection means for detecting a voltage between motor terminals of a starter started by a power-on operation of a start switch, and an armature voltage; One of the detected motor terminal voltage and the armature voltage is used as a reference value, and the other is used as a comparison value. The reference value / comparison value is determined when the armature voltage is used as a reference value or the voltage between motor terminals. And a comparison means for outputting an engine start state detection signal when the value exceeds a predetermined value set at the time of comparison using the reference value as a reference value. .

Further, a timer means which starts simultaneously with a power-on operation of a start switch, a starter driving means for energizing a starter for a predetermined timer time of the timer means, a motor terminal voltage of the started starter and an armature voltage are detected. And comparing one of the detected voltage between the motor terminals and the armature voltage as a reference value and comparing the other as a comparison value, and the value of the reference value / comparison value uses the armature voltage as the reference value. When the time exceeds the predetermined value set at the time of the comparison using the voltage between the motor terminals as a reference value, a comparison unit that outputs an engine start state detection signal,
There is provided an automatic starter for a starter, wherein the power supply to the starter driving means is interrupted by an engine start state detection signal output by the comparing means.

[Operation] According to the engine start state detecting device using the starter described above, the voltage between the motor terminals of the starter and the armature voltage are detected by the voltage detecting means, and either one of the two voltages is used as a reference value and the other is used as the reference value. When the reference value / comparison value is input to the comparison means as a comparison value, and exceeds a predetermined value set at the time of comparison using the armature voltage as the reference value or the voltage between the motor terminals as the reference value. The comparison means outputs an engine start state detection signal.

According to the automatic starter starter described above, the starter that has been energized to the starter driving means for a predetermined timer time is started by the timer means that starts simultaneously with the power-on operation of the start switch, and the starter is started by the voltage detection means. Motor terminal voltage and armature voltage are detected,
One of these two voltages is set as a reference value and the other is input as a comparison value to the comparison means. When the reference value / comparison value is the armature voltage as the reference value or the voltage between the motor terminals is the reference value. If the values exceed the predetermined values set at the time of comparison, the comparison means outputs an engine start state detection signal, and the power supply to the starter driving means is cut off to deactivate the starter. When the engine start state detection signal is not output, the power to the starter driving means is automatically cut off when the timer expires, and the starter is deactivated.

"Example" (First Example) An example of an engine start state detecting device using a starter according to the present invention will be described as a first example in a form applied to a starter protection device for preventing starter overrun.

In FIG. 1, reference numeral 1 denotes a battery, 2 denotes a key switch, and comprises an ignition switch 2a and a start switch 2b for starting the starter 3. Reference numeral 3 denotes a known starter, and reference numerals 31 and 32 denote suction and holding coils for causing a pinion gear (not shown) meshing with a link gear (not shown) of the engine to advance and closing the normally open contact 33.
Reference numeral 34 denotes a field winding, and 35 denotes an armature, which constitutes a motor unit 3a of the starter.

A point B is a terminal B connecting the starter 3 and the battery 1, a point M is an M terminal connecting the normally open contact 33 and the motor section 3a, and a point A is a field winding 34 and a winding of the armature 35. A to connect
Indicates terminals. 4 is an input terminal of the coils 31 and 32.
Reference numeral 5 denotes a relay, which is a normally open relay contact 51 and a suction coil 52.
It is composed of One end of the relay contact 51 is connected to the B contact, and the other end is connected to the input terminals 4 of the coils 31 and 32.

Reference numeral 6 denotes an engine start state detecting device using the starter of the present invention.

Reference numeral 61 denotes a voltage detection circuit connected to the M terminal, which detects a voltage between motor terminals. Reference numeral 62 denotes a voltage detection circuit connected to the terminal A for detecting an armature voltage. Each of them corresponds to the voltage detecting means of the present invention.

In the case of FIG. 1, the voltage between the motor terminals can also be detected from the battery terminal or the terminal of the start switch 2.

The voltage detection circuit 61 has resistors R1 and R2 interposed in series, and also connects a connection point between the resistors R1 and R2 to an inverting input terminal of the comparator 63 via a resistor R3. As a result, the voltage between the motor terminals is divided by the ratio of the resistances R1 and R2 and input to the comparator 63 as a comparison value. The voltage detection circuit 62 is connected to the resistor R4
To input the armature voltage to the comparator 63 as a reference value. Reference numeral 64 denotes a relay drive circuit which is connected to the start switch 2b and has a suction coil 52 of the relay 5 and a transistor Tr1 for driving the relay interposed in series. The relay drive circuit 64 includes the suction coil 52
And a flywheel diode D1 is connected in parallel to detect the induced voltage of the attraction coil 52. Reference numeral 65 denotes a switching circuit which branches from the relay drive circuit 64, connects a resistor R5 to the base of the transistor Tr1 for driving the relay, and connects the resistor R6 and the transistor Tr2 for switching in parallel. I do. Output circuit 66 of the comparator 63
Is connected to the base of the switching transistor Tr2 while interposing resistors R7 and R8. 67 is the feedback resistor R
9 is a feedback circuit connected to the non-inverting input terminal of the comparator 63 via 9.

The operation of the above configuration will be described. When the driver performs a power-on operation of turning the key switch 2 into the start switch 2b side, the power supply voltage is applied by the switching circuit 65 to the base of the transistor Tr1 for driving the relay via the resistor R5, and the transistor Tr1 is turned on. The suction coil 52 of the relay 5 operates to close the normally open relay contact 51. When the relay contact 51 is closed, the coils 31 and 32 are operated through the B terminal and the input terminal 4 and the normally open contact 33 is closed and the starter 3 is operated, and the pinion gear of the starter 3 advances as is well known. The engine meshes with the ring gear of the engine to drive the engine, and the engine is ignited.

FIG. 2, shows the change in the the start switch 2b is turned after the starter 3 of the motor terminal voltage V _M and the armature voltage V _A, the voltage V _M between the motor terminals by the solid line, the armature voltage V _A is indicated by a dotted line. Here, the following is noted. That is, the ratio between the motor terminal voltage V _M and the armature voltage V _A when the engine is driven is usually V _A / V _M ≒ 1/2 to 9/10, and the above voltage ratio after ignition of the engine is V _A ′ / V _M ′> 9/10.
Thus, in FIG. 1, the ratio of the resistance value between the resistor R1 interposed in series R2 to the voltage detection circuit 61 1: If set to 9, the voltage V _M between the motor terminals is detected 9/10 bisection Pressed, comparator
It is input as a comparison value to 63 inverting input terminals. On the other hand, the non-inverting input terminal, because the armature voltage V _A is input as a reference value, the comparator 63 (9/10) and a × V _M and V _A are compared. As described above, since the engine driving by the starter 3 is a reference value / comparison value _{= V A / V M ≒ 1} / 2~9 / 10, V A
≦ (9/10) V _M becomes comparator 63 outputs "0" state.
For this reason, the switching transistor Tr2 does not conduct, so that the relay driving transistor Tr1 continues to conduct and keeps driving the engine.

Next, when the engine ignites and the explosion is completed, it is shown in Fig. 2.
V _M ′, V _A ′ increases and V _A ′> (9/10) × V _M ′, and V _A ′ / V _M ′, that is, the reference value / comparison value exceeds 9/10 . Accordingly, the comparator 63 outputs a "1" state, and the transistor Tr2 is turned on, thereby turning off the transistor Tr1. When the transistor Tr1 is turned off, the attraction coil 52 of the relay 5 is deactivated, the relay contact 51 is opened, and no voltage is applied to the terminal 4. For this reason, the coils 31 and 32 are deactivated, and the starter 3 opens the contact point 33 and retracts the pinion gear meshing with the ring gear of the engine.

The return state of the starter 3 after the complete explosion of the engine is determined by the operation of the feedback resistor R9 of the feedback circuit 67.
It is maintained by keeping the state.

Also, as shown by the broken line in FIG. 1, the capacitor C10, the resistor R10,
If R11 is provided, when the start switch 2b is turned on, the non-inverting input terminal side of the comparator 63 is reliably kept at a low potential, and the operation becomes more stable with respect to chattering of the start switch 2b, and the M terminal and the A terminal A reliable operation can be exhibited even for superimposed noise. Although not shown,
On the inverting input terminal side, a capacitor can be added in parallel with the resistor R2 for the same reason.

FIG. 3 shows another embodiment of the starter protection device, in which the connection between the armature 35 of the motor unit 3a of the starter 3 and the field winding 34 is changed, Control the energization of input terminals 4 of coils 31 and 32 with transistor T
This is performed by a semiconductor switch S using r3. Engine start state detecting device 16 used in this embodiment
The engine start state detecting device 6 used in the first embodiment uses the resistor R12 Zener diode ZD to achieve a constant voltage, and the armature 35 and the field winding constituting the motor section 3a of the starter 3. The difference is that the connection with the 34 is reversed. Therefore, the operation of the comparator 63 is determined by the resistance values of the resistors R13, R14 and R15, R16 interposed in series with the voltage detection circuit 161 connected to the M terminal and the voltage detection circuit 162 connected to the A 'terminal, respectively. Let V _A ′ ≦ (1/10) V _M. The voltage detection circuit 161 is connected to the non-inverting input terminal of the comparator 63, together with the pressure component out of the V _M and the resistor R13 and R14, the resistor R4
As a reference value via. The voltage detection circuit 162 is connected to the inverting input terminal, divides V _A ′ by the resistors R15 and R16, and inputs the voltage as a comparison value via the resistor R3. After ignition of the engine, the potential of the A 'terminal decreases due to the complete explosion.
V _A ′ <(1/10) × V _M , that is, reference value / comparison value = V _M / V _A ′> 1
When the value becomes 0, the comparator 63 outputs a "1" state to turn on the transistor Tr2, cut off the transistor Tr1, and further cut off the transistor Tr3, so that the power is supplied to the input terminal 4 to the coils 31 and 32. No voltage is applied. Therefore, the coil
The starter 3 opens the contact point 33 and the pinion gear meshing with the ring gear of the engine is retracted. Other operations of the present embodiment are the same as those of the first embodiment, and thus detailed description is omitted.

The starter protection device of each of the above embodiments uses the starter-based engine start state detection device of the present invention, so that the starter 2 keeps the start switch 2b in the power-on state or the start switch 2b is caught. Even if a non-return failure occurs, the starter automatically disengages from the engine when the engine ignites and complete explosion occurs. Therefore, the starter can be protected by completely preventing the so-called overrun, in which the starter is driven by the engine.

(Second Embodiment) An embodiment of an automatic starter of a starter using an engine start state detecting device using a starter according to the present invention will be described as a second embodiment.

In FIG. 4, the components of a starter 3, a relay 5 and an engine start state detecting device 6 using a starter are the same as those of the first embodiment shown in FIG. Detailed description is omitted. The relay 5 corresponds to a driving means of the automatic starter for a starter according to the present invention.

Reference numeral 7 denotes a timer unit for automatically starting the starter 3. The non-inverting input terminal of the comparator 71 of the timer section 7 is supplied with the potential at the point P of the charging circuit 72 in which a capacitor C20 and a resistor R21 are interposed in series via a resistor R22. The terminal is connected to the start switch 2b so that the potential at the point Q of the voltage dividing circuit 73 in which resistors R23 and R24 are interposed is input via the resistor R25. Output circuit of comparator 71
74 is connected to the switching circuit 65 of the engine start state detecting device 6. 75 is a feedback circuit, and a feedback resistor R2
6 is connected to the non-inverting input terminal of the comparator 71. Further, it is connected to the M terminal so that the voltage at the point M is inputted to the comparator 71 via the diode D2.

The operation of the automatic starter starter including the timer section 7, the engine start state detector 6 and the starter 3 will be described.

When the driver performs a power-on operation of turning the key switch 2 into the start switch 2b, a charging current flows through the resistor R21 through the capacitor C20 to the charging circuit 72 of the timer unit 7.
Also, current flows through the resistors R23 and R24 in the voltage dividing circuit 73. The potential at the point P of the charging circuit 72 attenuates as shown in FIG. 5 (b), and the potential at the point Q of the voltage dividing circuit 73 becomes a value obtained by dividing the voltage by the resistors R23 and R24, and is compared by the comparator 71. . Potential at point P ≧ Q
During the predetermined time T at which the potential of the point is reached, the comparator 71 outputs the “1” state (FIG. 3C). Therefore, a current flows through the base of the transistor Tr1 for driving the relay via the resistor R5 of the switching circuit 65 connected to the output circuit 74 of the comparator 71, and the transistor Tr1 conducts to drive the relay 5. When the relay 5 is actuated, the starter 3 is started, and the engine start state detecting device 6 detects the voltage V _M between the motor terminals of the starter 3 and the armature voltage V _A until the engine is ignited and the explosion is completed. By the same operation as in the first embodiment, the comparison is made by the comparator 63. After the complete explosion of the engine, the relay 5 is shut off and the starter 3 is detached from the engine (FIG. 4 (d)).
~ (F)). Also, as shown by the broken line in FIG.
Even if the driver turns off the start switch before engine ignition (so-called choking), the M terminal voltage is supplied to the comparator 71 via the diode D2.
As described above, the starter 3 is started for a predetermined time T until the contact 33 of the starter 3 opens. Furthermore, when the ignition of the engine is poor and the explosion is not completed, the driver continues to operate the start switch 2b for a long time, but after a predetermined time T has elapsed as shown in FIG. The output becomes "0", the transistor Tr1 for driving the relay is cut off, no voltage is applied to the input terminals of the coils 31, 32 of the starter 3, and the starter 3 separates from the engine and returns. Therefore, at this time, the driver turns off the start switch 2b once and then starts it again, so that it is possible to prevent heat generation of the starter and burnout without using extra power.

Further, in the automatic starter of the starter of this embodiment, since the engine start state is constantly monitored by the engine start state detecting device 6, the starter 3 returns with the complete combustion of the engine and does not overrun. Further, since the M terminal voltage is supplied to the comparator 71 via the diode D2, the engine can be reliably started even when so-called choking is performed. For this reason, as shown by the broken line in FIG.
b 'can be used, and in this case, an automatic starter for the starter with further improved operability and simplicity can be obtained. Also, the power of the relay 5 can be obtained from the terminal of the ignition key 2a of the key switch 2 instead of the start switch 2b.

"Effect of the Invention" The engine start state detecting device using the starter of the present invention has the above-described configuration, and the voltage detecting means detects the voltage between the motor terminals of the starter and the armature voltage, and either one of the two voltages is detected. The reference value / comparison value is input to the comparison means, and the reference value / comparison value is set when the armature voltage is used as the reference value or when the voltage between the motor terminals is used as the reference value. If the predetermined value exceeds a predetermined value, the comparison means outputs an engine start state detection signal, and the detection of the engine start state is performed by comparing the motor terminal voltage, which is the internal voltage of the motor section of the starter, with the armature voltage. Because it is performed by comparison, it is not affected by the capacity and state of the battery or the electric load state other than the starter,
Stable and highly reliable detection becomes possible. In addition, the overall configuration is based on a circuit configuration using a starter and one comparator, and has excellent effects such as being simplified and being optimally applied to a starter protection device or an automatic starter of a starter. .

The starter automatic starter of the present invention is configured such that the starter is energized for a predetermined timer time by the timer means which starts simultaneously with the power-on operation of the start switch to start the starter, and the voltage between the motor terminal voltage of the starter and the voltage detection means. An armature voltage is detected, and either one of the two voltages is set as a reference value and the other is input to a comparison means as a comparison value. When the voltage exceeds a predetermined value which is set at the time of comparison using the voltage between terminals as a reference value, the comparison means outputs an engine start state detection signal, the power supply to the starter driving means is cut off, and the starter is deactivated. The use of the above-described engine start state detecting device using a starter makes it possible to simplify the configuration and to automatically start the starter. It has excellent effects such as can be performed dynamic reliably.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing the configuration of the first embodiment, FIG. 2 is a timing chart showing the operation of the first embodiment, and FIG. 3 is an electric circuit showing the configuration of another embodiment of the first embodiment. Figure, 4th
FIG. 5 is an electric circuit diagram showing the configuration of the second embodiment, and FIG.
6 is a timing chart showing the operation of the embodiment. 2 ... key switch, 2b ... start switch, 3 ...
Starter, 4 ... input terminal, 5 ... relay (starter driving means), 6, 16 ... engine start state detecting device by starter, 7 ... timer section (timer means), 33 ... normally open contact, 34 ... ... Field winding, 35 ... Armature, 61,161,62,16
2 ... voltage detection circuit (voltage detection means), 63 ... comparator (comparison means).

Continuing from the front page (72) Inventor Masahiro Seguchi 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (72) Inventor Takeshi Araki 1-1-1, Showa-cho, Kariya-shi, Aichi Nihon Denso Corporation (72 ) Inventor Taku Ito 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-B 60-10187 (JP, B2) JP-B 49-44682 (JP, B1) Sho-Jin 52-6737 (JP, Y1)

Claims (2)

(57) [Claims] 1. A voltage detecting means for detecting a motor terminal voltage and an armature voltage of a starter started by a power-on operation of a start switch, and one of the detected motor terminal voltage and armature voltage. The reference value / comparison value is set to a predetermined value which is set when the armature voltage is used as the reference value or when the voltage between the motor terminals is used as the reference value. An engine start state detecting device using a starter, comprising: a comparison unit that outputs an engine start state detection signal when the value exceeds the value. 2. A timer means which starts simultaneously with a power-on operation of a start switch, starter driving means for energizing a starter for a predetermined timer time of the timer means, a voltage between motor terminals of the starter to be started, and an armature voltage. And comparing one of the detected motor terminal voltage and the armature voltage as a reference value and the other as a comparison value, wherein the reference value / comparison value is based on the armature voltage. When the value exceeds the predetermined value set at the time of the comparison or when the comparison using the voltage between the motor terminals as the reference value,
An automatic starter for a starter, comprising comparison means for outputting an engine start state detection signal, wherein the power supply to the starter driving means is interrupted by the engine start state detection signal output by the comparison means.