JPH1162793A - Remote start system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform various treatments in remote start treatment by reducing the number of signal lines. SOLUTION: A remote start signal from a remote start transmitter is input into a remote start ECU 30 through a receiving antenna 10. When a regular remote start signal is received, the remote start ECU 30 starts an air conditioner ECU 44 for the control of various equipment, an engine ECU 46, and a body ECU 48 through an equipment bus 32, a bus buffer 34, and a body bus 36. When these ECUs are started, various signals are taken in and, based on them, it is decided whether the remote start is performed or not. In addition, the driving of a rear defogger 50 and a front defroster 52 is also controlled according to the conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote start system for starting a vehicle engine by remote control and performing a warm-up operation.

[0002]

2. Description of the Related Art If it is possible to perform warm-up operation of a vehicle engine by remote control before the driver gets on the vehicle, it is convenient to start the vehicle immediately after the driver gets on the vehicle. Therefore, a remote start system for such an engine has been conventionally known.

For example, by operating a portable transmitter,
When the engine start is instructed, a remote start signal including an ID code stored in advance is transmitted. Upon receiving the remote start signal, the vehicle-side receiver checks whether the ID code is correct, and starts the engine if the ID code is confirmed. When starting the engine, it is necessary to confirm that the shift lever is at the parking position. Therefore, a signal line for turning on the ignition, a signal line for turning on the starter, a signal line for sending a control signal to the engine ECU for engine control, and a shift lever for the receiver for remote start control on the vehicle side are provided. A plurality of signal lines had to be connected, such as a signal line for receiving a signal about the position.

Further, in Japanese Patent Application Laid-Open Nos. Hei 7-262931 and Hei 1-195974, the air conditioner is automatically started when the engine is remotely started.
A device that regulates the temperature inside the vehicle when a driver gets in has been proposed. According to such a device, when the driver gets on the vehicle, not only is the engine warmed up, but also
The interior of the vehicle is arranged in a comfortable state, and an environment suitable for the driver can be obtained.

[0005]

However, in the above conventional example, the receiver for remote start control has a signal line for detecting air temperature and a signal line for controlling an air conditioner such as an air conditioner to be controlled. Signal lines and the like must be further connected. Therefore, there is a problem that the number of signal lines is increased as the number of terminals of the receiver is increased, and the routing is complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a vehicle remote start system capable of easily controlling various devices by suppressing an increase in the number of signal lines. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION The present invention is a remote start system mounted on a vehicle and receiving an engine start remote start signal transmitted from a transmitter and starting the engine. Receiving a remote start signal, and receiving a signal from a plurality of sensors mounted on the vehicle, a remote start ECU that generates an engine start signal, an engine start unit that starts the engine in response to the engine start signal, A plurality of device control ECUs for controlling on-vehicle devices, and a multiplex communication bus line for transmitting a signal between the plurality of device control ECUs and the remote start ECU by multiplex communication; A device control EC using an engine start signal transmitted from the transmitter and a multiplex communication bus line. Based on the plurality of signal taken from and controls the generation of the engine start signal.

As described above, according to the present invention, the remote start ECU and the device control E using the multiplex communication bus line.
Communication with the CU is performed. Therefore, the equipment control ECU
A large number of signal lines are not required to capture various signals from the device, and various signals can be captured and control according to the state at that time can be easily performed.

Further, the present invention provides the remote start E
The CU fetches, via a multiplex communication bus line, the detected value of the outside air temperature sensor fetched by any of the plurality of device control ECUs, and generates a device control signal for controlling the operation of heating the window based on the detected value. It is characterized by doing.

As described above, defrosting of the window can be performed according to the state of the outside air temperature. Also,
Cooling of the vehicle interior can be performed as needed.

The present invention also provides the remote start E
The CU captures at least a shift lever position and an ignition key insertion detection signal captured by any of the plurality of device control ECUs, provided that the shift lever is in the parking position and the ignition key is not inserted. Generating an engine start signal.

As described above, by taking into account that the key is not inserted, that the shift range is parking, and the like, the engine is remotely started, thereby preventing malfunction and performing a reliable remote start. it can.

[0013]

Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

[Overall Configuration] FIG. 1 is a block diagram showing the overall configuration of a remote start system for a vehicle according to this embodiment. The receiving antenna 10 receives a signal transmitted wirelessly from the transmitter, and supplies the obtained high-frequency signal to the high-frequency receiving circuit 12. The high-frequency receiving circuit 12 performs a receiving process such as demodulation on the high-frequency signal received by the receiving antenna 10. The signal from the high-frequency receiving circuit 12 is subjected to waveform shaping in the waveform processing circuit 14 and is input to the CPU 16 as a digital signal.

A hood switch 20 is connected to the CPU 16 via an input circuit 18 so that the CPU 16 can receive a signal for opening and closing the hood. Further, a hazard relay is connected to the CPU 16 through an output circuit 22 so that the operation of the hazard lamp can be controlled by the CPU 16.

The CPU 16 has a relay circuit 26
Are connected, and the ignition signal IG,
A start signal ST is output. This ignition signal IG turns on the ignition switch and enables ignition of the engine. Further, the start signal ST enables the operation of the starter. Therefore, the engine can be started by turning on the ignition signal IG and the start signal ST and supplying fuel to the engine. Note that + B is a battery voltage, which is input to the relay circuit 26.

Further, a multiplex input / output circuit 28 is connected to the CPU 16 so that multiplex communication with the outside can be performed. That is, the CPU 16 uses the multiplexed input / output circuit 28 to
It takes in various signals from outside and outputs various control signals.

The high frequency receiving circuit 12, the waveform processing circuit 14, the CPU 16, the input circuit 18, the output circuit 22, the relay circuit 26 and the multiplex input / output circuit 28 constitute a remote start ECU 30.

A bus buffer 34 is connected to the multiplex input / output circuit 28 via a product bus 32 which is one of multiplex communication buses. This bus buffer 34 is used for the product bus 32.
And a body bus 36 to which various ECUs are connected on the vehicle side. Bus buffer 3
4 is a first communication circuit 38 connected to the body bus 36
And a second communication circuit 40 connected to the article bus 32, and a CPU for transmitting signals between the first and second communication circuits
It consists of 42. Therefore, between the product bus 32 and the body bus 36, signal interference in both buses can be prevented, and reliable communication can be performed.

The body bus 36 includes various device control ECs.
Although U is connected, in this example, three ECUs of an air conditioner ECU 44, an engine ECU 46, and a body ECU 48 are connected. Thereby, these three ECUs 4
Multiplex communication using the body bus 36 can be performed between the four ECUs 4, 46, 48 and the remote start ECU 30.

The air conditioner ECU 44 includes a rear defogger 5.
0, a front defroster 52 and an air conditioner blower 54 are connected, and an air conditioner ECU 44 controls these operations. A shift position switch 56, an outside air temperature sensor 58, and a water temperature sensor 60 are connected to the engine ECU 46, and the engine ECU 46 takes in signals from these switches and sensors. This engine ECU
Reference numeral 46 also performs engine ignition timing control, fuel supply control, and the like.

A receiving antenna 64 is connected to the body ECU 48 via a receiver 62. The receiving antenna 64 is for receiving a wireless lock / unlock signal of the door from the transmitter of the keyless entry system. The received door lock / unlock signal is supplied to the body ECU 48. The body ECU 48 includes a courtesy switch 66 for detecting door opening / closing, a door lock relay 68 for controlling door lock / unlock, and a headlight relay 7 for controlling on / off of the headlight.
0 is connected. Accordingly, the body ECU 48 detects the open / closed state of the door, controls the unlocking of the door, and controls the turning on / off of the headlight. In particular, in this example, an illuminance sensor 72 for detecting ambient brightness is also connected to the body ECU 48, and the body ECU 48 performs lighting control for automatically turning on and off headlights based on the ambient brightness.

Here, various types of multiplex communication can be adopted for the multiplex communication performed on the article bus 32 and the body bus 36. For example, a CSMA / CD system or the like is used. In this method, each ECU monitors whether or not a bus is empty, and performs communication when the bus is empty. In this case, the bus is a serial communication bus, and the transmission speed is 10 kbp.
s is common. In this method, multiple ECs
If U transmits data at the same time and collides, the transmission is stopped from low priority data, and the data is transmitted again after a lapse of random time. In addition, various methods used in a LAN, such as a token passing method and a master / slave method, can be used. In addition, CSMA / CD
The communication in the vehicle by the system is disclosed in
No. 128542 and the like.

Next, the operation of the remote start ECU 30 when a remote start signal is transmitted from the transmitter and supplied to the CPU 16 via the receiving antenna 10 will be described with reference to FIGS.

First, the following operation is performed when the main switch of the remote system for determining whether to make the remote start function function is on. Therefore, when the main switch is off, the operation for remote start is not performed.

When the main switch is turned on, first, an initial routine shown in FIG. 2 is performed. That is, the receiving antenna 10
In step S1, it is detected whether a signal has been received. When the signal is received and supplied to the CPU 16, the remote start ECU 30 starts up from the power saving mode (sleep state) to the normal operation mode (S2). Then, it is determined whether the received signal is a remote start signal from an authorized transmitter (S3). This determination is based on the I
The determination is performed by determining whether the D code matches the registered identification code stored in the nonvolatile memory in the remote start ECU 30. If the result is not correct, the remote start ECU 30 returns to the sleep state (S4) and ends the process.

On the other hand, if the signal is a normal remote start signal, the IG relay in the relay circuit 26 is turned on,
The signal IG is turned on (S5). Next, a wake-up signal is output to the article bus 32 (S6). This wake-up signal is supplied to each of the ECUs 44, 46 and 48 via the bus buffer 34 and the body bus 36. As a result, each of the ECUs 44, 46, and 48 starts the start-up process. Then, after elapse of t seconds (S7), each EC
When U44, 46 and 48 rise, the normal operation is permitted (S8).

Thus, the normal processing shown in FIG. 3 is started. First, the remote start ECU 30 captures various state signals via the article bus 32 (S11). Then, it is determined whether the multiplex communication input data satisfies the remote start operation condition (1) (S12). In this example, (i) no key is inserted from the state of the key insertion detection switch provided on the key cylinder of the ignition key, (ii) all doors are closed from the state of courtesy switch 66, (iii) ) The bonnet is closed from the state of the bonnet switch 20, (iv)
That the IG signal is off is the operating condition (1).

If the determination is YES, a signal indicating that the remote start operation is being performed is output to the article bus 32 (S1).
3). This is performed by setting a predetermined specific bit (bit during remote start operation) of the serial data output from the remote start ECU 30 to 1. When the remote start ECU 30 periodically outputs a signal and sets the above bit in the signal to 1, each of the ECUs 44, 46, and 48 can confirm that the remote start operation is being performed.

Next, it is determined whether the operating condition (2) is satisfied (S14). The operating condition (2) is as follows: (i) the alternator L terminal (when the engine is stopped 1) is 1;
i) The shift lever is at the parking position. Here, it may be determined whether the charge lamp is on instead of the alternator L terminal.

If the determination is YES, the relay flag of the starter system in the relay circuit 26 is set to "1".
The ST signal is turned on (S15). Thereby, the starter is activated. Also, since the IG signal is on,
In the engine, ignition is performed at a predetermined timing,
Since the fuel is supplied by the rotation of the engine, the engine starts.

Next, it is determined whether the alternator output is H or the engine speed is 300 rpm or more (S
16) If YES, the relay flag of the starter system is set to "0" (S17).

Then, the warm-up operation is controlled (S1).
8). On the other hand, a preset time T seconds (for example, several seconds)
Is determined (S19), and if YES, starter retry control is performed (S20).

Here, in the warm-up operation, the engine is started for a preset time (10 or 20 minutes) at the same engine speed as during normal startup. The warm-up operation may be automatically terminated when the water temperature or the like reaches a predetermined state. In the retry, the same starting operation is performed several times, and if the engine still does not start, the process may be terminated. In addition, when the battery voltage is equal to or lower than the predetermined value, it is also preferable not to perform the retry.

As described above, the remote start ECU 30
Wakes up various ECUs and takes in vehicle status signals from various ECUs via a multiplex communication bus,
Only when a predetermined condition is satisfied, the remote start of the engine is performed. Therefore, appropriate engine start control can be performed while suppressing an increase in the number of signal lines.

Note that the ECU 30 does not receive the sleep NG bit for more than 3 seconds in the signal on the article bus 32,
If the user is in the sleep permission state, the apparatus enters a sleep standby state. When the sleep NG bit is not received for another three seconds, the sleep state is entered.

Here, FIG. 4 shows an example of the logic of generation of the starter signal ST, that is, the logic of the operating conditions (1) and (2) in the flowchart of FIG. A signal indicating that the ignition key is not inserted and that the hood is closed is input to the AND gate 40. A signal indicating that all the doors are closed and the IG signal is off is input to the AND gate 42. Then, a signal (I) indicating that the outputs of the AND gates 40 and 42 and the remote start signal from the transmitter are normal.
D code match) is input to the AND gate 44. Therefore, "H" is output from the AND gate 44 only when all of these conditions are satisfied.

On the other hand, the signal indicating that the shift is in parking and the signal of the alternator L terminal are input to the AND gate 50. The outputs of the AND gates 44 and 50 are input to the AND gate 46. Here, the output from the alternator L terminal is passed through a delay circuit 48 to the AND gate 4.
6 is input. Therefore, when a predetermined time (for example, one second) has elapsed since the engine was started,
The starter signal ST becomes L. In addition, AND gate 44
Corresponds to the operating condition (1), and the output of the AND gate 50 corresponds to the operating condition (2).

Further, in the system of the present embodiment, the remote start ECU 30 determines the necessity of operating the air conditioner and controls the operation. For example, after the start of the engine, the outside air temperature is
6, take in via bus buffer 34, article bus 32,
It is determined whether the outside air temperature is equal to or lower than a predetermined value (for example, 5 ° C.). If the temperature is 5 ° C. or less, the rear defogger 5
0, the front defroster 52 and the air conditioner blower 54 are turned on. This removes frost from the window,
The temperature inside the vehicle cabin can be raised to a comfortable temperature. If there is a wiper dicer, it may be turned on to eliminate the freezing of the wiper. Further, when the outside air temperature is equal to or higher than a predetermined value (for example, 28 ° C.), it is also preferable to turn on the air conditioner and start cooling.

Further, it is also preferable that the door lock is locked / unlocked by using a remote start transmitter. In this case, the receiving antenna 10 receives the lock and unlock signals,
From the state of 6, it is determined whether all the doors are closed. Then, when all the doors are closed, the remote start ECU 30 transmits an instruction to lock and unlock the body ECU 48 via the article bus 32, the bus buffer 34, and the body bus 36. Thus, the body ECU 48 drives the door lock relay 68 to unlock the door. When a trunk open signal is transmitted from the remote start transmitter, the signal is taken into the remote start ECU 30 via the reception antenna 10. The remote start ECU 30 sends a trunk open output request to the body ECU 48 in the same manner as described above, and the body ECU 48 drives a relay (not shown) for opening the trunk to open the trunk.

Note that, even in such control, the remote start ECU 30 performs ID collation and operates only when a legitimate signal is sent.

Next, when the engine is turned on by remote start, the engine is stopped after a warm-up operation for a predetermined time (for example, 10 minutes). At this time, when the switch of the con light is on (the headlight is auto) and the illuminance sensor 72 detects that the surroundings are dark,
The body ECU 48 controls the headlight relay 70 to turn on the headlight. If the remote start ECU 30 simply turns off the engine after a lapse of a predetermined time, the headlights remain on. Therefore, when the engine is turned on by a remote start, the remote start ECU 30 generates a request for a light-off signal and supplies it to the body ECU 48. Then, the body ECU 48 is turned off. Thus, the above-described problem does not occur.

FIG. 5 shows an external view of an example of a remote start transmitter. As described above, the start / lock button 82, the stop /
Three buttons, an unlock button 84 and an engine button 86, are provided, and one indicator lamp 88 is provided. Note that the antenna 90 is for transmitting a radio signal.

To start the engine, the engine button 86 is pressed. As a result, the indicator lamp 88 blinks. If left as it is, the blinking of the indicator lamp 88 will continue for about 2 seconds. When the start / lock button 82 is pressed while the indicator lamp 88 is blinking, a remote start signal is transmitted from the antenna 90 of the transmitter 80. In the determination of the remote start ECU 30 on the vehicle side, if the above-described starting conditions are satisfied, the remote start ECU 30 drives the hazard relay 24 to turn on the hazard lamp (about 0.5 seconds). Then, in a normal case, the engine starts in three seconds thereafter.

When the engine button 86 is pressed and the stop / unlock button 84 is pressed while the indicator lamp is blinking, a signal for instructing stop of the engine is transmitted from the antenna 90. In response to the reception of this signal, the remote start ECU 30 turns on the hazard lamp (about 0.5 seconds) and stops the engine.

By pressing the start / lock button 82 without pressing the engine button 86,
The door can be locked, and the door can be unlocked by pressing the stop / unlock button 84. Further, when the start lock button 82 is pressed for 1.5 seconds or more, the remote start ECU 30
Check the door lock and blink the hazard lamp for about 3 seconds. Therefore, the lock can be confirmed.

The antenna 90 can be extended. When the antenna 90 is stored, communication can be performed at a distance of about several meters, so that door lock control and the like can be performed with the antenna 90 stored. On the other hand, in the case of remote start of the engine from a remote place, the antenna 90 is pulled out and used.

As described above, the engine remote start is performed by a combination of two button operations. Thus, it is possible to reliably prevent the engine from being started due to an erroneous operation.

Here, in an engine such as a diesel engine that requires a long warm-up time, it is desired to increase the warm-up time. Therefore, it is convenient if the user can change the warm-up time. FIG. 6 shows a flowchart for changing the warm-up time.

First, the user opens and closes the door within 5 seconds,
The IG is turned on by a key operation (S31), then the IG is turned off within 15 seconds, and the key is removed (S32). Then, the operation of inserting and removing the key is repeated five times within 10 seconds (S33).

When such a user operation is performed, the remote start ECU 30 changes the warm-up time (S34). That is, if the setting at that time is A minutes, the setting is reversed, such as B minutes, and if one setting is B minutes, the setting is A minutes. For example, A is 10 minutes and B is 20 minutes.

When an operation of inserting and removing a key is performed after the above operation, the setting change is notified by an indicator lamp (S35). For example, when switching to A, the indicator lamp is lit once for 0.5 seconds, and when switching to B, it is lit twice for 0.5 seconds (S3
6).

[0053] In this manner, by the operation of the user,
The set time of the warm-up operation in the remote start can be changed. In this flowchart,
S31, 32, 33, and 35 indicate user operations.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of a system.

FIG. 2 is a flowchart illustrating an initial routine of a remote start.

FIG. 3 is a flowchart showing a normal operation of a remote start.

FIG. 4 is a diagram showing a logic circuit for determining an engine operating condition.

FIG. 5 is a diagram illustrating an appearance of a remote start transmitter.

FIG. 6 is a flowchart showing a setting change of a warm-up operation.

[Explanation of symbols]

10 receiving antenna, 30 remote start ECU,
32 supply bus, 34 bus buffer, 36 body bus, 44 air conditioner ECU, 46 engine ECU, 4
8 Body ECU.

Claims (3)

[Claims] 1. A remote start system mounted on a vehicle and receiving an engine start remote start signal transmitted from a transmitter and starting an engine, comprising: receiving a remote start signal from a transmitter; A remote start ECU for generating an engine start signal; an engine start means for starting the engine in response to the engine start signal; and a plurality of sensors for taking in signals from a plurality of sensors mounted on the vehicle and controlling onboard devices. Device control ECU, and the plurality of device control ECUs and remote start ECU
And a multiplex communication bus line for transmitting a signal between the multiplex communication buses, and wherein the remote start ECU captures an engine start signal transmitted from the transmitter and a device control ECU using the multiplex communication bus line. A remote start system for a vehicle, wherein generation of the engine start signal is controlled based on a plurality of signals. 2. The system according to claim 1, wherein the remote start ECU controls the plurality of device controls E.
A vehicle control unit for receiving, via a multiplex communication bus line, a detection value of an outside air temperature sensor taken by one of the CUs, and generating a device control signal for controlling an operation of heating a window based on the detection value. Remote start system. 3. The system according to claim 1, wherein the remote start ECU controls the plurality of device controls E.
At least a detection signal of the shift lever position and the presence / absence of insertion of an ignition key taken by one of the CUs is taken, and an engine start signal is generated on condition that the shift lever is in the parking position and the ignition key is not inserted. A remote start system for vehicles.