JPH08100748A - Engine remote starting system - Google Patents

Abstract

PURPOSE: To determine the suitable value of the starter driving time, so as to enable accurate remote starting by measuring the time in which an ignition switch is maintained in the starter starting position in manual starting of an engine, and correcting the time in which electric power is supplied to the starter in remote starting of the engine. CONSTITUTION: An engine remote starting system E is constituted of a portable equipment K carried by a user and an on-board equipment C assembled to an automobile. In a control circuit 5 of the on-board equipment C, a memory control unit 52 reads out storing of the maintaining time, into an E<2> PROM6, in which an ignition switch SW is maintained in the starter starting position to an E<2> PR or the stored maintaining time in manual starting of the engine. A measuring unit 56 measures the maintaining time in which the ignition switch SW is maintained in the starter starting potion. A correction unit 57 corrects the starter driving time on the basis of the mean value of the maintaining time of the past times stored in the E<2> PROM6 in manual starting of the engine and the retry times.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a remote engine starting system.

[0002]

2. Description of the Related Art An engine remote start system is capable of remotely starting the engine of a car parked in a cold room outdoors from a warm room or the like, and therefore has a great need in cold regions.

The remote engine starting system of Conventional Example 1 is
The engine started a portable device that has a start switch that issues a command signal to start the engine, transmits a radio wave carrying the command signal, a receiving circuit that receives the radio wave, a common contact of the ignition switch and a starter drive contact. Relay circuit that bypasses until it is determined, a start determination circuit that determines that the engine has started when the output voltage of the alternator exceeds a predetermined value, and a control circuit that operates the relay circuit based on the demodulated command signal. And a vehicle-mounted device having.

The conventional engine remote starting system of the second example is as follows.
Bypassing the portable device that has a start switch that issues a command signal to start the engine and that transmits the radio wave carrying the command signal, the receiving circuit that receives the radio wave, the common contact of the ignition switch and the starter drive contact for a predetermined time. In-vehicle device having a relay circuit, a start determination circuit for determining whether or not the engine is started based on the battery voltage after completion of bypass, and a control circuit for operating the relay circuit based on a demodulated command signal If it is determined that the engine has started, warm-up operation is performed, and if it is determined that the engine has not started, the control circuit operates the relay circuit and retries.

[0005]

In the technique of Conventional Example 1,
It is necessary to connect a lead wire for detecting the output voltage of the alternator to the power generation terminal of the alternator, which has a drawback that the mounting work takes time and labor. Further, the technique of Conventional Example 2 has the following problems. The predetermined time suitable for starting the engine varies slightly depending on the type of vehicle, battery status, outside temperature, etc., so the number of retries increases (if it is shorter than the optimum value) or the starter deteriorates (if it is longer than the optimum value). }.

A first object of the present invention is to provide an engine remote starting system in which the starter drive time is determined to a value suitable for the vehicle type, the state of the battery, etc., and the engine remote starting can be reliably performed. A second object of the present invention is to provide an engine remote starting system capable of reliably performing remote engine starting with a small number of retries even if the engine remote starting fails for the first time.

[0007]

In order to solve the above problems, the present invention adopts the following configurations. (1) A portable device for sending an electromagnetic wave superposed with a command signal for starting and stopping an engine to the air, a detecting means for capturing the electromagnetic wave and demodulating the command signal, and a specific contact point of an ignition switch. A vehicle-mounted device having a bypass means for setting the ignition switch to the same state as when the ignition switch is switched to the starter start position or the engine operation maintaining position, and a control means for operating the bypass means based on a demodulated command signal. In a remote engine starting system provided with, when the engine is manually started, a measuring means for measuring the maintenance time for which the ignition switch is maintained at the starter starting position, and storing the measured maintenance time in a storage element or A memory means for reading the stored maintenance time, and an engine remote by the portable device. A correction for correcting the starter drive time for bringing the specific contacts into conduction so as to be in the same state as when the ignition switch is switched to the starter starting position during operation based on the plurality of read maintenance times. And means are provided.

(2) A portable device for sending an electromagnetic wave superposed with a command signal for starting and stopping the engine to the air,
Detection means for capturing the electromagnetic wave and demodulating the command signal, bypass means for electrically connecting the common contact COM-starter start position contact ST of the ignition switch or the common contact COM-engine operation maintaining position contact IG, and In an engine remote starting system comprising an on-vehicle device having a control means for operating the bypass means based on a demodulated command signal, a voltage detection means for detecting a battery voltage, an ignition system voltage, and a starter system voltage. When the engine is manually started, when the detected ignition voltage V _IG is at the high level and the detected battery voltage V _B becomes less than the starter drive determination value Vth, the measurement of the maintenance time is started and the detected ignition voltage V _IG is at the high level. there are detection starter voltage V _ST is final measurement of the keeping time at a low level Measuring means, a memory means for storing the measured maintenance time in a storage element and a reading of the stored maintenance time, and a common contact COM-starter for the ignition switch when the engine is remotely started by the portable device. The starter drive time for bringing the start position contacts ST into conduction is provided based on the plurality of read maintenance times.

(3) A portable device for sending an electromagnetic wave superposed with a command signal for starting and stopping the engine to the air,
Detection means for capturing the electromagnetic wave and demodulating the command signal, bypass means for electrically connecting the common contact COM-starter start position contact ST of the ignition switch or the common contact COM-engine operation maintaining position contact IG, and In an engine remote starting system comprising an on-vehicle device having a control means for operating the bypass means based on a demodulated command signal, a voltage detection means for detecting a battery voltage, an ignition system voltage, and a starter system voltage. , Engine start determination means for determining whether or not the engine remote start has succeeded, and the detected battery voltage V _B is less than the starter drive determination value Vth when the detected ignition voltage V _IG is at a high level during manual engine start. the starts measuring the maintenance time, the detection ignition voltage V _IG is high There are detected starter voltage V _ST
Low level, the measuring means for ending the measurement of the maintenance time, the memory means for storing the measured maintenance time in the storage element and reading the stored maintenance time, and the remote start of the engine by the portable device. In this case, the common contact COM-starter start position contact S of the ignition switch
The starter driving time for bringing the Ts into the conductive state is corrected based on the plurality of read maintenance times and the number of retries.

[0010]

[Action]

{Operation of Claim 1} The measuring means measures the maintenance time during which the ignition switch is maintained at the starter starting position when the engine is manually started, and the memory means stores the measured maintenance time in the storage element. The memory means reads out a plurality of maintenance times stored in the storage element, and the starter drive time during which the starter is energized when the engine is remotely started,
The correction means corrects based on the read plurality of sustain times. When the user operates the portable device when remotely starting the engine, an electromagnetic wave superposed with a command signal is emitted into the air. The detection means of the vehicle-mounted device captures the electromagnetic wave and demodulates the command signal.

The control means operates the bypass means on the basis of the demodulated command signal to bring the specific contacts of the ignition switch into the conductive state for the corrected starter driving time, so that the ignition switch is set to the starter starting position. In the same state as when switched, the starter operates and the engine starts, and after the starter drive time has elapsed,
The same state as when switched to the engine operation maintaining position is maintained, the operation of the engine is maintained, and the starter stops operating.

(Operation of Claim 2) When the detected ignition voltage V _IG is at the high level during manual engine start, the detected battery voltage V _B is the starter drive judgment value Vt.
When it is less than h, the measuring means starts measuring the maintenance time,
When the detected ignition voltage V _IG is at the high level and the detected starter voltage V _ST is at the low level, the measurement of the sustain time is ended. The memory means stores the measured maintenance time in the storage element. The memory means reads the plurality of maintenance times stored in the storage element, and the correction means corrects the starter drive time for energizing the starter when the engine is remotely started based on the read plurality of maintenance times.

When the user remotely starts the engine,
When the portable device is operated, the electromagnetic wave on which the command signal is superimposed is emitted into the air. The detection means of the vehicle-mounted device captures the electromagnetic wave and demodulates the command signal.

The control means operates the bypass means on the basis of the demodulated command signal to bring the common contact COM-starter start position contact of the ignition switch into a conductive state for the corrected starter driving time, whereby the starter is operated. After the engine has started and the engine has started and the starter drive time has elapsed,
The common contact COM and the engine operation maintaining position contact IG are in the same state as they are switched so as to be in a conductive state,
The engine continues to operate and the starter stops operating.

(Operation of Claim 3) When the engine is manually started, the detected battery voltage V _B is the starter drive determination value Vt when the detected ignition voltage V _IG is at a high level.
When it is less than h, the measuring means starts measuring the maintenance time,
When the detected ignition voltage V _IG is at the high level and the detected starter voltage V _ST is at the low level, the measurement of the sustain time is ended. The memory means stores the measured maintenance time in the storage element. The memory means reads out a plurality of maintenance times stored in the storage element, and the correction means corrects the starter drive time for energizing the starter when the engine is remotely started based on the plurality of read maintenance times and the number of retries. To do.

When the user remotely starts the engine,
When the portable device is operated, the electromagnetic wave on which the command signal is superimposed is emitted into the air. The detection means of the vehicle-mounted device captures the electromagnetic wave and demodulates the command signal.

The control means operates the bypass means on the basis of the demodulated command signal to bring the common contact COM-starter start position contact of the ignition switch into a conductive state for the corrected starter driving time, whereby the starter is operated. After the starter drive time has elapsed, the common contact COM and the engine operation maintaining position contact IG are in the same state as they were switched to be in the conductive state, and the starter stops operating.

The engine start discriminating means discriminates whether or not the engine remote start is successful. If it is determined that the operation has succeeded, the warm-up operation is started, and if it is determined that the operation has failed, the control means operates the bypass means again to try to start the engine.

[0019]

【The invention's effect】

{Effect of claim 1} In the remote engine starting system, the measuring means measures the maintenance time during which the ignition switch is maintained at the starter starting position when the engine is manually started, and the memory means stores the measured maintenance time. The correction means corrects the starter drive time for energizing the starter when the engine is remotely started based on the plurality of read maintenance times. For this reason, the starter drive time for energizing the starter at the time of remote engine start is determined to a value commensurate with the vehicle type, the battery state, etc., and the remote engine start can be reliably performed.

(Effect of Claim 2) In the remote engine starting system, when the detected ignition voltage V _IG is at the high level when the engine is manually started, and the detected battery voltage V _B becomes less than the starter drive determination value Vth, The measuring means starts measuring the maintenance time, and when the detected ignition voltage V _IG is at the high level and the detected starter voltage V _ST is at the low level, the measurement of the maintenance time is ended. Then, the measured maintenance time is stored in a storage element, and the starter drive time for energizing the starter when the engine is remotely started is
The correction means makes a correction based on the read plurality of sustain times. For this reason, the starter drive time for energizing the starter at the time of remote engine start is determined to a value commensurate with the vehicle type, the battery state, etc., and the remote engine start can be reliably performed.

(Effect of Claim 3) In the engine remote starting system, when the detected ignition voltage V _IG is at the high level when the engine is manually started and the detected battery voltage V _B becomes less than the starter drive determination value Vth, The measuring means starts measuring the maintenance time, and when the detected ignition voltage V _IG is at the high level and the detected starter voltage V _ST is at the low level, the measurement of the maintenance time is ended. Then, the measured maintenance time is stored in a storage element, and the starter drive time for energizing the starter when the engine is remotely started is
The correction unit makes a correction based on the plurality of read maintenance times and the number of retries. Therefore, even if the engine remote start fails in the first time, the starter drive time for energizing the starter is determined to a value commensurate with the number of retries, and the engine remote start can be reliably performed with a small number of retries.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention (corresponding to claims 1 to 3) will be described with reference to FIGS. As shown in FIG. 1, the engine remote starting system E is composed of a portable device K carried by a user and an on-vehicle device C mounted in a vehicle.

The portable device K includes an engine start switch 11 for instructing engine start, an engine stop switch 12 for instructing engine stop, an engine start lamp 13, an engine stop lamp 14, a transmitting circuit 16, a receiving circuit 17, an antenna 18, and a battery. (Not shown) and the like. The engine start switch 11 and the engine stop switch 12 are normally open push button switches, and when they are pressed, the engine start command signal S _{1 for} starting the engine and the engine for stopping the engine, respectively. Stop command signal S
_The radio wave 10 in which ₂ is superimposed is radiated from the antenna 18 into the air.

The engine start lamp 13 and the engine stop lamp 14 (each LED) are different when the radio wave 40 superposed with the engine start signal Sa and the engine stop signal Sb reaches the receiving circuit 17 through the antenna 18. It remains lit until a signal is received or the portable device K is turned off.

The vehicle-mounted device C comprises an antenna 2, a receiving circuit 3, a transmitting circuit 4, a control circuit 5, an E ² PROM 6, a RAM 7, and a relay circuit 8. The receiving circuit 3 receives the engine start command signal S from the radio wave 10 captured by the antenna 2.
₁ or engine stop command signal S _{2 for} stopping the engine
Is a circuit that demodulates. The transmission circuit 4 is a circuit that transmits the radio wave 40 on which the engine start signal Sa and the engine stop signal Sb are superimposed.

The control circuit 5 composed of a microcomputer or the like includes a digital conversion section 51 and a memory control section 5.
2, engine start determination unit 53, control unit 54, measurement unit 5
6 and a correction unit 57. The digital conversion unit 51
The A / D converter detects a battery voltage (detection battery voltage V _B ), an ignition system voltage (detection ignition voltage V _IG ), and a starter system voltage (detection starter voltage V _ST ) and converts it into a digital value. The memory control unit 52, when starting the engine by manual, store and to E ² PROM6 sustain time T _S) of the ignition switch SW is maintained in a starter starting position, E ² PROM
The sustain time T _S stored in 6 is read.

The engine start determination unit 53 displays the digital value V ₁ − of the detected battery voltage after the starter operation is stopped.
When the digital value V ₀ of the detected battery voltage before starting the starter is larger than the digital value (judgment value) relating to the judgment, it is judged that the engine has started. The control unit 54
Engine start command signal S demodulated by the receiving circuit 3
₁ or engine stop command signal S _{2 for} stopping the engine
Is input, and the relay circuit 8 and the like are operated based on these signals S ₁ and S ₂ . The measuring unit 56 measures the maintenance time T _S during which the ignition switch SW is maintained at the starter starting position ST when the engine is manually started as follows.

When the detected ignition voltage V _IG is at the high level, the detected battery voltage V _B is the starter drive judgment value V
When it becomes less than th (the detected battery voltage V _B drops significantly due to the inrush current to the starter), the timer TM for maintaining time measurement is started, and the detected ignition voltage V _IG is at the high level and the detected starter voltage V _ST is When it becomes low level, the timer TM is stopped {see FIG. 5}. In this embodiment, since the maintenance time T _S is measured in this way, it can be completely distinguished from the case where the shift lever is shifted.

The correction unit 57 uses the starter drive time T as the average value of the last eight maintenance times T _S , ... T _S stored in the E ² PROM 6 when the engine is manually started, and the number of retries. Correct based on. Memory element E ²
The PROM 6 is a non-volatile memory, and stores the past maintenance time T _S measured by the measuring unit 56, data on the times T1, T2, T3 corrected by the number of retries, and the like.

The relay circuit 8 includes a control section 54 of the control circuit 5.
The ignition switch SW is turned on by "ACC", "IG", by electrically connecting the specific contacts of the ignition switch SW outside the switch.
It is a circuit that brings the same state as when it is switched to the "ST" position.

Next, the operation of the control circuit 5 will be described with reference to the flow charts of FIGS. 2 to 4 and the time charts of FIGS. In step s1, the control unit 54 determines whether or not the engine start command signal S ₁ is input,
If no input is detected (NO), the process proceeds to step s2, and if it is detected (YES), the process proceeds to step s15.

In step s2, the digital conversion unit 5
The control unit 54 determines whether or not the detected ignition voltage V _IG detected by 1 is at a high level, and if it is determined to be at a high level (YES), the process proceeds to step s3, and if it is determined to be at a low level ( If NO), the process returns to step s1 {see FIG. 5}.

In step s3, the digital conversion unit 5
The control unit 54 determines whether or not the detected starter voltage V _ST detected by 1 is at a low level. If it is determined to be at a low level (YES), the process proceeds to step s4, and if it is determined to be at a high level ( If NO, the process returns to step s2 {see FIG. 5}.

In step s4, the digital conversion unit 5
The control unit 54 determines whether or not the detected battery voltage V _B detected by 1 is less than the starter drive determination value Vth, and V _B <
If it is determined to be Vth (YES), step s5
If it is determined that V _B ≧ Vth (NO), the process proceeds to step s13 (see FIG. 5).

At step s5, the control section 54 starts the timer TM for measuring the maintenance time, and at step s6
Proceed to {see FIG. 5}. In step s6, the control unit 54 determines whether or not the detected ignition voltage V _IG detected by the digital conversion unit 51 is high level. If it is determined to be high level (YES), the process proceeds to step s7 and low level. If NO is determined (NO), the process proceeds to step s14 {see FIG. 5}.

In step s7, the digital conversion unit 5
The control unit 54 determines whether or not the detected starter voltage V _ST detected by 1 is at a low level. If it is determined to be at a low level (YES), the process proceeds to step s8, and if it is determined to be at a high level ( If NO, the process returns to step s6 {see FIG. 5}.

In step s8, the control section 54 stops the timer TM for measuring the maintenance time of the measuring section 56, and the process proceeds to step s9 (see FIG. 5). Step s9
Then, the memory controller 52 stores the maintenance time T _S measured by the timer TM in the E ² PROM 6, and proceeds to step s10 {see FIG. 5}. In step s10, E ² PRO
M6 stored in the past 8 times the sustain time T _S in (current Include the) content, the memory controller 52 reads from the E ² PROM6, an average value.

In step s11, the correction unit 57 corrects the average value obtained as described above in accordance with the number of retries (lengthens as the number of retries increases), time T1,
After obtaining T2 and T3, the process proceeds to step s12. Step s
In 12, the memory controller 52 stores the data corresponding to the obtained times T1, T2, and T3 in the E ² PROM 6,
It returns to step s1.

In step s13, the controller 54 determines whether or not the detected ignition voltage V _IG detected by the digital converter 51 is at a high level, and if it is determined to be at a high level (YES), the process returns to step s4. If it is determined to be the low level (NO), the process returns to step s1.

At step s14, the control section 54 clears the timer TM for measuring the maintenance time, and at step s1
Return to

In step s15, the control unit 54 executes the retry variable n = 1, and the process proceeds to step s16. In step s16, the control unit 54 instructs the relay circuit 8 to turn the ignition switch SW “OFF”.
From the "IG" position to the
Bypassing outside the ignition switch SW between the contact point and the IG contact point is started, and the process proceeds to step s17 {elapsed time 701 in FIG. 6}.

In step s17, the battery voltage V
_The control unit 54 waits for 3 seconds until _B becomes stable, and when the waiting time elapses {elapsed time point 702}, the process proceeds to step s18. In step s18, the battery voltage is digitally converted by the digital conversion unit 51 according to an instruction from the control unit 54 (elapsed time point 702), and the memory control unit 52 stores the digital value V ₀ of the detected battery voltage before starting the starter in the RAM 7. Then, the process proceeds to step s19.

At step s19, the retry variable n
The control unit 54 determines whether or not = 1. When n ≠ 1 (NO), the process proceeds to step s21, and when n = 1 (YE).
S) proceeds to step s20. In step s20, the starter drive time T is set to T1, and the process proceeds to step s24. Incidentally, when the manual 8 times the data about the time T _S maintains the ignition switch SW is maintained in a starter starting position when the engine start due is not stored in the E ² PROM6 is a T1 = 1.5 (sec) , T2 is set to 2 (seconds) and T3 is set to 2.5 (seconds).

At step s21, the retry variable n
= 2, the control unit 54 determines whether n ≠ 2 (NO) proceeds to step s23, and when n = 2 (YE
S) proceeds to step s22. In step s22, the starter driving time T is set to T2, and the process proceeds to step s24. In step s23, the starter drive time T is set to T3, and the process proceeds to step s24.

In step s24, the relay circuit 8 is instructed by the control unit 54 to turn on the ignition switch S.
Bypass outside the ignition switch SW between the COM contact and the ST contact so that W is switched from the “IG” position to the “ST” position.
3, 709} and proceeds to step s25.

In step s25, it is determined whether or not the starter drive time T (T1, T2, T3) has elapsed, and if it has elapsed (YES), the process proceeds to step s26. It should be noted that the starter driving time T is limited to a maximum of 3 seconds in order to prevent deterioration of the starter regardless of the values of the times T1, T2 and T3. In step s26, the relay circuit 8 is instructed by the control unit 54 to turn on the ignition switch S.
The bypass outside the ignition switch SW between the COM contact and the ST contact is canceled so that W is switched from the “ST” position to the “IG” position (the elapsed time 70
4, 710} and proceeds to step s27.

In step s27, the control unit 54 waits for 2.5 seconds until the battery voltage V _B stabilizes, and the waiting time elapses {elapsed time points 705 and 711} and step s28.
Proceed to. In step s28, the battery voltage is digitally converted by the digital conversion unit 51 according to an instruction from the control unit 54 {elapsed time points 705 and 711}, and the memory control unit 52 outputs the digital value V ₁ of the detected battery voltage after the starter operation is stopped. Store in RAM7, step s2
Proceed to 9.

In step s29, the memory control unit 52 reads out from the RAM 7 the digital value V ₁ of the detected battery voltage after the starter operation is stopped and the detected battery voltage value V ₀ before the starter drive according to an instruction from the control unit 54. Then, according to the instruction from the control unit 54, the engine start determination unit 53 determines whether or not (V ₁ −V ₀ )> the determination value is satisfied. If the determination value is satisfied (YES), the process proceeds to step s30, and if not satisfied ( (NO) advances to step s33.

In step s30, the controller 54 determines whether or not the engine stop command signal S ₂ is input. If no input is detected (NO), the process proceeds to step s31, and if input is detected (YES). It proceeds to step s32.

In step s31, it is determined whether or not the warm-up timer has counted up, and if it has counted up (Y
ES) proceeds to step s32. In step s32, the control unit 54 instructs the relay circuit 8 to switch the ignition switch SW from "IG" to "OFF".
The bypass outside the ignition switch SW between the COM contact and the IG contact is released so that the state is switched to the position, and the process returns to step s1.

At step s33, the retry variable n
The control unit 54 determines whether or not ≧ 3. If n ≧ 3 (YES), the process proceeds to step s32, and if n <3 (N).
O) advances to step s34. In step s34, retry variable n = retry variable n + 1 is executed, and the process proceeds to step s35. In step s35, the control unit 54 instructs the relay circuit 8 to switch the ignition switch SW from the "IG" position to the "OFF" position so that the ignition is switched between the COM contact and the IG contact. The bypass outside the switch SW is released, and the process proceeds to step s36. In step s36, the control unit 54 sets 1
After waiting for a second, when the waiting time has elapsed, the process returns to step s16.

Next, advantages of the engine remote starting system E of this embodiment will be described. [A] The driver who manually starts the engine keeps the ignition switch SW in the "ST" position for a necessary and minimum time to start the engine. And
The engine remote start system E measures the maintenance time (≈maintenance time T _S ) during which the ignition switch SW is maintained at the starter start position “ST” during manual engine start, and the measured maintenance time T _S is controlled by a memory. Part 52 is E
² Stored in PROM6, CO
Starter drive time T to bypass between M contact and ST contact
The (first time) is the read-out maintenance time T _S for the past eight times
The average value of x is 1.3.

Therefore, the starter drive time T for energizing the starter at the first remote engine start is set to a value corresponding to the vehicle type, the battery condition, etc., and the remote engine start can be reliably performed. .

[A] If the engine did not start remotely in the first try, T1 + 0.5 in the second try.
Since the starter driving time T is corrected to increase as the number of tries increases, such as T2 + 0.5 seconds in the second and third tries, the engine can be reliably started remotely.

The engine start determination unit 53 determines that the remote start has failed {NO in step s29}, and the step s
35 is configured to cancel the bypass between the COM contact and the IG contact outside the ignition switch SW for 1 second, so even if the engine is started by mistake, even if it is erroneously determined that it has not started, the COM contact-IG is determined in step s35. Bypass outside the ignition switch SW between contacts 1
Since it is released for a second, there is no problem such as the starter being driven while the engine is operating. In addition, the number of automatic retries is limited to 2 (up to 3 times in total).
Therefore, battery exhaustion can be prevented.

[C] In an automatic vehicle, a neutral start switch is usually connected as shown in FIG. 7 in order to prevent runaway. For this reason, if a method is adopted in which the starter is driven when the voltage of the ST system exceeds the judgment value and stopped when the voltage of the ST system falls below the judgment value, the ignition switch SW is maintained at the starter start position "ST". When measuring the maintenance time, even if the position of the shift lever is changed, the voltage of the ST system changes, so that it is indistinguishable from the drive of the starter motor.

However, the engine remote starting system E is
As shown in FIG. 2, when the engine is manually started, the ignition switch SW is maintained at the starter start position "ST" for a maintenance time (≈maintenance time T _S ), as shown in FIG.
~ Since the measurement is performed based on the flowcharts shown in steps s4 and s13, the maintenance time (≈ maintenance time T _S ) can be accurately measured even if the neutral start switch is mounted on the automatic vehicle connected as shown in FIG. it can. Further, since the output voltage of the alternator is not directly detected, it is not necessary to connect the lead wire to the power generation terminal of the alternator, and the installation work does not require much labor and time, and is excellent in mountability.

The present invention includes the following embodiments in addition to the above embodiments. a. In the above embodiment, the battery voltage, the IG system voltage, and the ST system voltage are converted into the digital conversion unit 51 (AD converter).
I converted it into a digital value and used it for various judgments.
An analog value may be used instead of the comparator.

B. If the first try fails and the second or third try succeeds when starting the engine remotely, as shown in FIG. 8 (also used in FIG. 2 and FIG. 3), the starter drive time at the time of success T may be changed to a configuration in which the T is stored in the E ² PROM 6 as the maintenance time T _S for m times (1 to 8 times). By doing this, the remote engine starting from the next time can be reliably performed once.

C. Taking advantage of the fact that the ACC voltage V _ACC becomes Lo level when the starter is driven, as shown in FIG. 9, step s4 of FIG. 2 is performed with V _ACC = Lo? The determination is changed to step s7, and V _ACC = Hi? Alternatively, the starter driving time may be measured instead of the judgment (corresponding to claim 1).

[Brief description of drawings]

FIG. 1 is a block diagram of an engine remote starting system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of an on-vehicle device of the engine remote starting system.

FIG. 3 is a flowchart showing an operation of an on-vehicle device of the engine remote starting system.

FIG. 4 is a flowchart showing an operation of an on-vehicle device of the engine remote starting system.

FIG. 5 is a time chart (engine start manually) showing waveforms of various parts of the vehicle-mounted device of the engine remote start system.

FIG. 6 is a time chart showing the waveform of each part of the vehicle-mounted device of the engine remote start system (successful remote start at the second try).

FIG. 7 is an electric circuit diagram illustrating connection of a neutral start switch in an automatic vehicle.

FIG. 8 is a flowchart showing an operation of the vehicle-mounted device in the modified example.

FIG. 9 is a flowchart showing the operation of the vehicle-mounted device of the engine remote starting system in the modified example.

[Explanation of symbols]

3 reception circuit (detection means) 6 E ² PROM (storage element) 8 relay circuit (bypass means) 10, 40 radio wave (electromagnetic wave) 51 digital conversion section (voltage detection means) 53 engine start determination section (engine start determination means) 54 Control unit (control unit) 56 Measuring unit (measuring unit) 57 Correction unit (correction unit) 52 Memory control unit (memory unit) C On-vehicle device E Engine remote start system S ₁ Engine start command signal (command signal) S ₂ Engine stop Command signal (command signal) K Portable device SW ignition switch V _IG detection ignition voltage V _ST detection starter voltage V _B detection battery voltage Vth judgment value T starter drive time T _S maintenance time

Claims (3)

[Claims] 1. A portable device for sending an electromagnetic wave superposed with a command signal for starting and stopping an engine to the air, a detecting means for capturing the electromagnetic wave and demodulating the command signal, and a specific contact point of an ignition switch. And a control means for operating the bypass means based on a demodulated command signal, by bringing the ignition switch into the same state as when the ignition switch is switched to the starter starting position or the engine operation maintaining position. In an engine remote start system equipped with an on-vehicle device, when the engine is manually started, a measuring means for measuring the maintenance time for which the ignition switch is maintained at the starter start position, and a storage element for the measured maintenance time Memory means for storing and reading the stored maintenance time; Jin Correct the starter drive time that brings the specific contacts into conduction so that the ignition switch is in the same state as when the ignition switch was switched to the starter start position at the time of remote start, based on the plurality of read maintenance times. A remote starting system for an engine, characterized in that it is provided with a correcting means. 2. A portable device for sending an electromagnetic wave superposed with a command signal for starting and stopping an engine to the air, a detection means for capturing the electromagnetic wave and demodulating the command signal, and a common contact COM of an ignition switch. -An on-vehicle device having a bypass means for bringing a starter start position contact ST or a common contact COM-engine operation maintaining position contact IG into a conductive state, and a control means for operating the bypass means based on a demodulated command signal; In a remote engine starting system equipped with a battery, a voltage detecting means for detecting a battery voltage, an ignition system voltage and a starter system voltage, and a battery detecting battery when a detected ignition voltage V _IG is at a high level during manual engine starting. When the voltage V _B becomes less than the starter drive determination value Vth, the maintenance time starts to be measured and the detection ignition Measuring means Nisshon voltage V _IG is the detection starter voltage V _ST a high level to end the measurement of the maintenance time to a low level, the measured maintenance time stored and to the memory element, the stored maintenance time The starter drive time for bringing the memory means for reading out and the common contact COM-starter start position contact ST of the ignition switch into a conductive state at the time of remote start of the engine by the portable device is set to a plurality of read maintenance times. A remote engine starting system, characterized in that it is provided with a correcting means for making a correction based on the above. 3. A portable device for transmitting an electromagnetic wave superposed with a command signal for starting and stopping an engine to the air, a detection means for capturing the electromagnetic wave and demodulating the command signal, and a common contact COM of an ignition switch. -An on-vehicle device having a bypass means for bringing a starter start position contact ST or a common contact COM-engine operation maintaining position contact IG into a conductive state, and a control means for operating the bypass means based on a demodulated command signal; In a remote engine starting system equipped with, a voltage detecting means for detecting a battery voltage, an ignition system voltage, and a starter system voltage, an engine start determining means for determining whether or not the engine remote start is successful, and a manual operation during engine start, the detection battery voltage V _B when the detected ignition voltage V _IG is at the high level Starts measuring the maintenance time and the starter drive judgment value less than Vth, a measuring means for detecting ignition voltage V _IG is the detection starter voltage V _ST a high level to end the measurement of the maintenance time to a low level, it is measured And a memory means for storing the maintenance time in a storage element and reading the stored maintenance time, and a connection between a common contact COM and a starter start position contact ST of the ignition switch when the engine is remotely started by the portable device. A remote engine starting system, comprising: a correction means for correcting the starter drive time to be brought into a state based on a plurality of read maintenance times and the number of retries.