JP2010116892A - Idle stop-start control device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an idle stop-start control device for a vehicle, capable of improving both fuel economy and safety simultaneously while maintaining a theft prevention performance. <P>SOLUTION: The electrical conduction to a first coil section 26b is enabled by the command of a second control unit 6, resulting in start of a starter 3 at the automatic restart after idling is stopped even when an interlock switch 24a is turned off, since a second switch 27 is constructed with an interlock relay drive line 27a whose one end is connected with a second control unit 6 and whose other end is connected with the other end of the first coil section 26b, and a first switch 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention cooperates an idle stop start mechanism, an interlock mechanism that mechanically detects a safe state at the time of engine start, and an authentication code verification mechanism that controls startability by comparing an authentication code of a portable device carried by a passenger. The present invention relates to a controllable idle stop start control device for a vehicle.

  Conventionally, an idle stop start system (ISS) is known in order to improve fuel consumption, reduce exhaust emissions, prevent vibration and noise, and the like. When the vehicle is stopped, the ISS automatically stops the engine when a predetermined engine stop condition, for example, the vehicle speed is zero, the travel range and the brake switch are turned on, and a predetermined restart condition, for example, When the traveling range and the brake switch are turned off, the engine is automatically restarted.

  An authentication code verification system (SKE: Smart Keyless Entry System) is also known for preventing theft of vehicles. The SKE performs wireless communication between a portable transmission / reception device (portable device) such as an electronic key carried by an occupant and a vehicle-side transmission / reception device (on-vehicle device) mounted on the vehicle, and the ID transmitted from the portable device. The engine is allowed to start when the code is authenticated as a regular ID code on the vehicle side.

  In Patent Document 1, in a vehicle equipped with ISS and SKE, it is determined whether the occupant can take the portable device out of the vehicle, and when it is determined that there is no possibility of taking out, the engine is automatically checked without checking the authentication code. When it is determined that there is a possibility of taking it out again, a technology is proposed in which verification of the authentication code is used as a condition for automatic restart of the engine. According to Patent Document 1, it is possible to avoid the problem that the restart cannot be performed due to the occurrence of the ID authentication failure of the portable device during the automatic restart of the engine without reducing the anti-theft performance.

JP 2006-214357 A

  On the other hand, an interlock system that mechanically guarantees a safe state at the time of starting the vehicle is known. The interlock system is intended to mechanically prevent the vehicle from jumping out due to control system runaway during normal engine startup. For example, an AT vehicle is operated in the P range or N range state. The vehicle can be started only when the vehicle is operated, and the MT vehicle is configured to be able to start the vehicle only when operated in the clutch cut state.

  Normal engine start, so-called engine start from a completely stopped state (first start) and automatic engine start from idle stop, so-called auxiliaries are in operation and only engine operation is stopped. This is different from the engine start (second start) in that the environment when the engine is started is different. That is, the first start is, for example, an engine start in a parking lot, and the second start is, for example, an engine start at a driving intersection.

  In Patent Document 1, when there is no possibility of taking out the portable device, the second start can be performed without verifying the authentication code. Therefore, although anti-theft performance and fuel efficiency improvement are compatible, safety at the time of the first start No consideration has been given to improving the performance. In addition, although it is conceivable to combine an interlock system with the technique proposed in Patent Document 1, at the second start from the idle stop at the intersection, the engine is switched to the P range or the N range, and the engine start operation is further performed. From the viewpoint of smooth running, there is a problem in terms of safety.

  An object of the present invention is to provide an idle stop start control device for a vehicle that can achieve both fuel efficiency improvement and safety improvement while maintaining antitheft performance.

  An idle stop start control device for a vehicle according to the present invention includes an authentication code verification means for determining whether or not an authentication code of a portable device carried by an occupant matches an authentication code stored on the vehicle side, and safety when starting the vehicle An interlock detection means for detecting a state, a starter control means for permitting the engine to start on condition that the safety state is detected by the interlock detection means and the authentication code is matched by the authentication code verification means, and a predetermined automatic stop condition When the above condition is satisfied, the engine is automatically stopped, and when a predetermined automatic restart condition is satisfied, an automatic stop / restart control means for automatically restarting the engine is provided.

  The invention according to claim 1 includes starter circuit means connected to the starter control means and provided with an operation switch for operating the starter motor in an on state. The starter circuit means is a detection result of the interlock detection means. And a second switch for turning on the operation switch when an automatic restart condition for the engine is satisfied even if the first switch means is in an off state. Means.

  According to the first aspect of the present invention, the starter circuit means having the operation switch for operating the starter motor has the first switch means for turning on the operation switch, the first switch means, and the second switch means having different operating conditions. The starter motor can be operated by two systems. In addition, since the second switch means is preferentially operated with respect to the first switch means, it is possible to use control of different operating conditions in combination.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first switch means is constituted by a relay means for turning on the operation switch.

  According to a third aspect of the present invention, in the first or second aspect of the invention, there is provided an automatic brake control means for maintaining the stop state of the vehicle. When the automatic brake control means is operating, the second switch means. Turns on the operation switch.

  The invention of claim 4 has an authentication code collating means for judging whether or not the authentication code of the portable device carried by the occupant matches the authentication code stored on the vehicle side, and the safety state at the time of starting the vehicle is detected. A first control unit for starting the starter motor of the engine when the authentication code is matched by the authentication code collating means, and when the predetermined automatic stop condition is satisfied, the engine is automatically stopped and the predetermined automatic restart is performed. A second control unit that automatically restarts the engine when the condition is satisfied, and when the automatic restart condition of the engine is satisfied, the first control controls the automatic restart by the second control unit. It is characterized by giving priority to control by the unit.

  In the invention of claim 4, since the automatic restart by the second control unit is prioritized over the control by the first control unit, the control of different operating conditions can be used together.

  According to the first aspect of the present invention, it is possible to achieve both fuel efficiency improvement and safety improvement while maintaining theft prevention performance.

  That is, the starter motor is operated under the respective operating conditions by the first switch means that operates based on the detection result of the interlock detection means for improving safety and the second switch means that is operated by the automatic stop / restart control means for improving fuel efficiency. Can be activated. Moreover, since the second switch means is prioritized over the first switch means at the time of automatic restart, it is possible to automatically restart without performing the interlock release operation. Safety can be ensured.

  According to the invention of claim 2, since the first switch means is a relay means for turning on the operation switch, a pseudo state of interlock release can be formed with a simple configuration.

  According to invention of Claim 3, it has an automatic brake control means to maintain the stop state of a vehicle, and when this automatic brake control means is operating, the second switch means is for turning on the operation switch. Further, it is possible to prevent the vehicle from jumping out and shocking due to the creep force accompanying the engine start.

  According to the invention of claim 4, when the automatic restart condition of the engine is satisfied, the automatic restart by the second control unit is prioritized over the control by the first control unit, so that the antitheft performance is maintained. It is possible to achieve both improved fuel efficiency and improved safety.

  That is, the starter motor can be operated under the respective operating conditions by the first control unit and the second control unit. Moreover, since the second control unit is prioritized over the first control unit at the time of automatic restart, automatic restart is possible without performing an interlock release operation. The safety of time can be secured.

  Hereinafter, the best mode for carrying out the present invention will be described.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of the present idle stop start control device, and FIG. 2 shows a principal circuit diagram of the present idle stop start control device.

  As shown in FIG. 1, the engine 2 of the vehicle 1 drives the vehicle 1 via a power train including a torque converter and an automatic transmission (not shown). The engine 2 is coupled to the starter motor 3 via a belt, and is started by the rotation of the starter motor 3. Fuel injection and ignition of the engine 2 are controlled by a second control unit 6 that forms part of the integrated controller 4.

  The integrated controller 4 that controls the operation of the vehicle 1 includes a first control unit 5, a second control unit 6, and a third control unit 7. Each of the units 5 to 7 is connected to a CAN 8 (communication line). Connected so that signals can be sent and received.

  The integrated controller 4 includes an authentication code signal of a portable transceiver (portable device) 9 carried by a passenger, a signal of an engine speed sensor 10 that detects the speed of the engine 2, a signal of a vehicle speed sensor 11 that detects a vehicle speed, A signal of the brake switch 12 that is turned on when the brake pedal is depressed and a range signal of the inhibitor switch 13 that detects the travel range based on the operation position of the shift lever of the automatic transmission are input.

  The integrated controller 4 also includes a signal from a water temperature sensor 14 that detects the coolant temperature of the engine 2, a signal from an oil temperature sensor 15 that detects the oil temperature of the automatic transmission, and a hydraulic sensor 16 that detects the hydraulic pressure of the automatic transmission. Signal, signal of the battery remaining amount sensor 17 for detecting the remaining amount of the power supply battery 21 to the electric load such as the air conditioner or the starter motor 3, the signal of the booster negative pressure sensor 18 for detecting the brake booster negative pressure, the brake fluid pressure A signal from the brake fluid pressure sensor 19 for detecting the signal, a signal from the accelerator switch 20 that is turned on when the accelerator pedal is depressed, and the like are input.

  The first control unit 5 has an authentication code verification unit 51 inside, and is configured to function as a vehicle-side transmission / reception device (on-vehicle device) capable of wireless communication with the portable device 9. The vehicle 1 is provided with an outdoor transmission antenna and an indoor transmission antenna in order to transmit a request signal from the in-vehicle device 5 to the portable device 9. A receiving antenna that receives a unique authentication code signal (ID code) as a response signal from the portable device 9 is installed in the vehicle interior.

  Further, the first control unit 5 is configured to input information from a start button, a door request switch, a receiving antenna, etc. of the vehicle 1 (not shown), and to output a control signal to a door lock actuator, a meter unit, an external buzzer, etc. is doing. The first control unit 5 is connected to an engine start switch 22 that is interlocked with the push operation of the start button by the occupant.

  The authentication code verification unit 51 is configured to determine whether or not the authentication code returned from the portable device 9 matches the authentication code stored on the vehicle side. Since the verification method of the authentication code is a known technique, detailed description thereof is omitted.

  The portable device 9 carried by the occupant has a portable device control unit 91, a reception antenna and a transmission antenna (not shown) and the like. The portable device control unit 91 inputs information from the receiving antenna and outputs a control signal to the transmitting antenna, thereby receiving the request signal from the in-vehicle device 5 and authenticating it as a response signal for the in-vehicle device 5 Code signal transmission. The portable device 9 includes a battery as a driving source and an emergency key that can forcibly start the vehicle 1 when a system failure occurs.

  The second control unit 6 includes a starter control unit 61 that controls the operation of the starter 3 and an automatic stop / restart control unit 62 that controls idle stop and restart of the engine 2, such as fuel injection and ignition of the engine 2. Is controlling.

  The starter control unit 61 is electrically connected to the starter circuit unit 23. The starter control unit 61 starts the engine 2 on the basis of detection of a safe state by the interlock detection unit 24 and matching of the authentication code by the authentication code verification unit 51. A signal to be permitted is configured to be transmitted to the starter circuit unit 23.

  The starter circuit unit 23 includes an operation switch 25 that operates the starter motor 3 in the on state, a first switch 26 that activates the operation switch 25 based on the detection result of the interlock detection unit 24, and the first switch 26 is off. Even when the engine is in the state, the engine is automatically restarted from the idle stop, that is, the engine start (second start) condition is established from the state in which only the operation of the engine 2 is stopped while the auxiliary machinery is operating. In this case, the second switch 27 is configured to turn on the operation switch 25.

  As shown in FIG. 2, the operation switch 25 has a relay structure including an operation switch portion 25a and an operation coil portion 25b. One end of the operation switch unit 25 a is connected to the battery 21, the other end of the operation switch unit 25 a is connected to the starter motor 3, and one end side line 25 c of the operation coil unit 25 b is connected to the first control unit 5. When the operation coil unit 25 b is energized, the operation switch unit 25 a is turned on and power is supplied from the battery 21 to the starter motor 3.

  The first switch 26 has a relay structure including a first switch part 26a and a first coil part 26b. One end of the first switch portion 26a is connected to the other end of the operating coil portion 25b, the other end of the first switch portion 26a is connected to the second control unit 6, and one end of the first coil portion 26b is connected to the battery 21. Connected. When the first coil part 26b is energized, the first switch part 26a is turned on, and the actuating coil part 25b can be energized.

  The other end of the first coil portion 26 b is connected to one end of an interlock switch 24 a of the interlock detection unit 24. The interlock switch 24a is turned on by the mechanical operation of the shift lever when the shift lever is operated to the N range or the P range in order to ensure a safe state at the time of the first start. It is configured to energize. In other words, the N range or P range state in which the driving force of the engine 2 is not transmitted to the wheels, that is, the so-called interlock release condition is detected by the interlock switch 24a linked to the mechanical operation of the shift lever.

  In this embodiment, the N range or the P range is set as the interlock release condition. However, when applied to the MT vehicle, the clutch cut state where the driving force of the engine 2 is not transmitted to the wheels or the gear position is neutral. It is also possible to set an interlock release condition.

  With the above configuration, when the authentication code matches at the time of the first start and the interlock release condition is satisfied, that is, when the so-called interlock switch 24a is in the on state, the first switch portion 26a is turned on. The control unit 6 and the operating coil portion 25b are electrically connected. Here, when the engine start switch 22 is turned on, the operation coil portion 25b is energized based on the command of the second control unit 6, and the operation switch portion 25a is turned on to supply power to the starter motor 3. .

  The second switch 27 is configured to turn on the operation switch 25 when the second start condition is satisfied even when the first switch 26 is in the OFF state. Specifically, the second switch 27 is configured by the interlock relay drive line 27a and the first switch 26, one end of which is connected to the second control unit 6 and the other end of which is connected to the other end of the first coil portion 26b. is doing. That is, even when the interlock switch 24a is in the OFF state, it is possible to energize the first coil portion 26b by a command from the second control unit 6, thereby forming a pseudo state of interlock release.

  The automatic stop / restart control unit 62 automatically stops the engine 2 when a predetermined automatic stop condition is satisfied while the vehicle 1 is traveling, and automatically restarts the engine 2 when a predetermined automatic restart condition is satisfied. It is configured to make it.

The predetermined automatic stop condition at the time of idling stop is satisfied when all of the following items are met.
-The detection value of the vehicle speed sensor 11 is zero.-The detection value of the brake switch 12 is turned on when the brake pedal is depressed.-The detection value of the shift position by the inhibitor switch 13 is the travel range.-The detection value of the engine water temperature sensor 14 is more than the predetermined value.-Automatic The detection value of the oil temperature sensor 15 of the transmission is greater than or equal to a predetermined value. The detection value of the hydraulic sensor 16 of the automatic transmission is greater than or equal to the predetermined value. The absolute value of the value is equal to or greater than a predetermined value. In this embodiment, all the items (1) to (8) are satisfied. However, with the aim of simplifying the control system, at least (1) to ( The establishment of 3) may be a basic condition, and (4) to (8) may be omitted based on the specifications of the vehicle 1.

The predetermined automatic restart condition at the time of the second start is that the establishment of the item (11) is an essential condition, and the automatic restart condition is established if any of the items (12) to (17) is met. It is determined.
(11) Detection value of shift position by inhibitor switch 13 is travel range (12) Detection value of brake switch 12 is off (13) Detection value of engine water temperature sensor 14 is less than predetermined value (14) Oil temperature sensor of automatic transmission The detected value of 15 is less than a predetermined value (15) The detected value of the battery remaining amount sensor 17 is less than the predetermined value (16) The absolute value of the detected value of the booster negative pressure sensor 18 is less than the predetermined value (17) The accelerator pedal is depressed and the accelerator is depressed The detection value of the switch 20 is on. Note that the automatic restart condition can be determined only by the items (11) and (12) with the aim of simplifying the control system.

  The automatic stop / restart control unit 62 determines an automatic stop condition, and when the automatic stop condition is not satisfied, in a so-called idle stop execution impossible state, an idle stop notification device (not shown) is operated to notify the occupant. When the automatic stop condition is satisfied, a command for stopping the fuel injection and ignition of the engine 2 is transmitted when the vehicle 1 is kept stopped for a predetermined time, for example, 3 seconds.

  In addition, at the time of the second start, the automatic stop / restart control unit 62 determines the automatic restart condition, and when the automatic restart condition is satisfied, sends an operation command for the starter motor 3 to the starter control unit 61 and In response to this, a command for executing fuel injection and executing ignition is transmitted. The operation command for the starter motor 3 is continued until the engine speed reaches a predetermined speed or higher.

  The third control unit 7 controls the brake pressure of each wheel by the ABS valve unit 28 provided for each brake mechanism of each wheel, and controls the braking force of each wheel so that each wheel is not locked. The ABS valve unit 28 is provided between a disk (not shown) provided on each wheel and a master cylinder, and includes a motor-driven oil pump, a switching valve, and an accumulator. Since the structure of the ABS is a known technique, a detailed description is omitted.

  An automatic brake control unit 71 is provided in the third control unit 7. The automatic brake control unit 71 is configured to operate the ABS valve unit 28 in order to maintain the stop state of the vehicle 1 during idle stop. Braking by the ABS valve unit 28, so-called idle stop braking, is continued until the on-state is detected by the accelerator switch 20 from the establishment of the automatic stop condition.

  An AT vehicle equipped with an oil pump driven by the engine 2 has a hydraulic pressure source when the engine is stopped, and therefore the starting clutch is released. At the time of the second start, although the oil pump is driven, a sufficient discharge pressure may not be obtained as an engagement pressure of the starting clutch, and the oil pump is started in the inertia phase before the precharge phase is completed. When the discharge pressure is secured, the vehicle 1 jumps out and shocks. Therefore, the completion period of the precharge phase is ensured by setting the idle stop braking end time as the start operation by the occupant, that is, when the accelerator switch 20 is detected. In addition, priority can be given to improving the responsiveness, and it is also possible to set the brake switch 12 off detection as the braking end timing.

  The automatic brake control unit 71 controls the target braking force during idle stop braking based on the detected value of the brake fluid pressure sensor 19 and a predetermined target value. The target braking force is equal to the creep force generated when the engine 2 is started. When the road gradient is equal to or greater than a predetermined value, the target braking force is corrected so that the braking force increases in proportion to the gradient rate of the road gradient. The ABS valve unit 28 is adjusted and controlled.

  The automatic brake control unit 71 is configured such that the engine 2 can be restarted by turning on the engine start switch 22 during idling stop when the brake fluid pressure is equal to or higher than the target braking force. That is, at the time of idling stop, when the brake fluid pressure is equal to or higher than the target braking force and the engine start switch 22 is on, an on signal of the engine start switch 22 is transmitted to the second control unit 6, The second switch 27 is turned on. As a result, it is possible to restart the passenger by operating the start button during idle stop while maintaining safety.

  Next, the idle stop start control process will be described based on the flowchart of FIG. Si (i = 1, 2,...) Indicates each step.

  First, various signals such as travel range, vehicle speed, brake switch, etc. are read (S1). This control process is executed every several hundreds of milliseconds when the vehicle 1 is traveling. Next, the process proceeds to S2, and it is determined whether or not an idle stop condition is satisfied. Here, the idle stop condition is the establishment of the items (1) to (8) described above.

  If the idle stop condition is satisfied as a result of the determination in S2, the process proceeds to S3, and it is determined whether or not the portable device 9 is present in the vehicle interior. If the result of determination in S2 is that the idle stop condition is not satisfied, the routine proceeds to S1.

  As a result of the determination in S3, when the portable device 9 is present in the vehicle interior, the process proceeds to S4, where it is determined whether or not the vehicle 1 is completely stopped based on the vehicle speed. The presence of the passenger compartment is determined based on whether or not the authentication code returned from the portable device 9 to the in-vehicle device 5 matches the authentication code stored on the vehicle 1 side. As a result of the determination in S3, when the portable device 9 is not present in the vehicle interior, the process proceeds to S1.

  As a result of the determination in S4, when the vehicle 1 is completely stopped, the process proceeds to S5, and it is determined again whether or not the portable device 9 exists in the vehicle interior. As a result of the determination in S4, when the vehicle 1 is not in a complete stop, the determination is continued until the complete stop.

  As a result of the determination in S5, when the portable device 9 is present in the vehicle interior, the process proceeds to S6, where the ABS valve unit 28 is operated to execute automatic brake control. The reason for confirming the presence of the portable device 9 again is that a certain amount of time is required until the vehicle 1 stops, and an authentication failure occurs due to noise or the like depending on the traveling environment. As a result of the determination in S5, when the portable device 9 is not present in the vehicle interior, the process proceeds to S1.

  After adjusting and controlling the brake fluid pressure of each wheel to the target braking force by the ABS valve unit 28, idle stop is executed (S7). During idle stop, fuel injection and ignition of the engine 2 are stopped, but a predetermined electric load such as an air conditioner is operating.

  Next, as a result of the determination in S8, if the idle stop restart condition is satisfied, the process proceeds to S9. Here, the idle stop restart condition is that the establishment of the item (11) described above is an essential condition, and if any of the items (12) to (17) is met, the automatic restart condition is established. Judgment. As a result of the determination in S8, if the idle stop restart condition is not satisfied, the process proceeds to S7.

  In S <b> 9, the automatic stop / restart control unit 62 sends an operation command for the starter motor 3 to the starter control unit 13 to turn on the second switch 27, and commands to execute fuel injection and ignition to the engine 2. Send. After the starter motor 3 is started (S10), the process proceeds to S11.

  As a result of the determination in S11, when the restart of the engine 2 is completed, the process returns, and when the restart of the engine 2 is not completed, the determination is continued. Completion of restart of the engine 2 is determined by whether or not the explosion is complete and whether the rotational speed of the engine 2 is equal to or higher than a predetermined rotational speed. In this embodiment, the operation of the starter motor 3 is continued until the restart is completed.

Next, the operation and effect of the present idle stop start control device according to the first embodiment will be described.
Since the starter circuit unit 23 is provided, the first switch 26 that operates based on the detection result of the interlock detection unit 24 that improves safety and the second switch 27 that operates by the automatic stop / restart control unit 62 that improves fuel efficiency. The starter motor 3 can be operated under the respective operating conditions.

  In addition, since the interlock relay drive line 27a connected to the other end of the first coil portion 26b is provided, the operation of the second switch 27 is given priority over the first switch 26 that operates under the interlock condition at the time of automatic restart. Can be made. As a result, automatic restart can be performed without performing an interlock release operation, ensuring safety at start-up and driving safety, idle stop start control, interlock control, and authentication code verification control. Can be coordinated and controlled.

  Since the first switch 26 has a relay structure in which the operation switch 25 is turned on, the interlock release pseudo state can be formed with a simple configuration. In addition, an automatic brake control unit 71 for maintaining the stopped state of the vehicle 1 is provided, and the operation switch 25 is turned on by the second switch 27 in a state where the automatic brake control unit 71 is operated. The vehicle 1 can be prevented from jumping out and shocking by force.

In addition, since the automatic brake control unit 71 controls the ABS valve unit 28 so as to achieve the target braking force according to the road gradient, it can reliably maintain the stopped state.
Further, since the one end side line 25c of the actuating coil portion 25b is connected to the first control unit 5, the authentication code collation control and the idle stop start control become an independent control system, and the antitheft can be improved. .

  Next, Example 2 will be described with reference to FIG. FIG. 4 shows a circuit diagram of a main part of the present idle stop start control device. Moreover, the same code | symbol is attached | subjected to the structure similar to Example 1. FIG.

  As in the first embodiment, the engine 2 is coupled to the starter motor 3 via a belt, and is started by the rotation of the starter motor 3. The integrated controller 4 that controls the operation of the vehicle 1 includes a first control unit 5, a second control unit 6, and a third control unit 7. Each of the units 5 to 7 sends a signal to the CAN 8. It is connected so that it can send and receive.

  The integrated controller 4 includes a portable device 9, an engine speed sensor 10, a vehicle speed sensor 11, a brake switch 12, an inhibitor switch 13, a water temperature sensor 14, an oil temperature sensor 15, a hydraulic sensor 16, a battery remaining amount sensor 17, a booster negative pressure. Signals from the sensor 18, the brake fluid pressure sensor 19, the accelerator switch 20, and the like are input.

  The first control unit 5 has an authentication code verification unit 51 inside, and is configured to function as an in-vehicle device capable of wireless communication with the portable device 9. The authentication code verification unit 51 in the first control unit 5 is configured to determine whether or not the authentication code returned from the portable device 9 matches the authentication code stored on the vehicle side.

  The second control unit 6 includes a starter control unit 61 that controls the operation of the starter 3 and an automatic stop / restart control unit 62 that controls idle stop and restart of the engine 2, such as fuel injection and ignition of the engine 2. Is controlling. The starter control unit 61 is electrically connected to the starter circuit unit 23. The starter control unit 61 starts the engine 2 on the basis of detection of a safe state by the interlock detection unit 24 and matching of the authentication code by the authentication code verification unit 51. A signal to be permitted is configured to be transmitted to the starter circuit unit 23.

  The starter circuit unit 23 includes an operation switch 25 that operates the starter motor 3 in the on state, a first switch 26 that activates the operation switch 25 based on the detection result of the interlock detection unit 24, and the first switch 26 is off. Even in the state, the second switch 27 is configured to turn on the operation switch 25 when the second start condition is satisfied.

  The operation switch 25 has a relay structure including an operation switch portion 25a and an operation coil portion 25b. One end of the operation switch unit 25 a is connected to the battery 21, the other end of the operation switch unit 25 a is connected to the starter motor 3, and one end side line 25 c of the operation coil unit 25 b is connected to the second control unit 6.

  The first switch 26 has a relay structure including a first switch part 26a and a first coil part 26b. One end of the first switch portion 26a is connected to the other end of the operating coil portion 25b, the other end of the first switch portion 26a is connected to the first control unit 6, and one end of the first coil portion 26b is connected to the battery 21. Connected

  The other end of the first coil portion 26 b is connected to one end of an interlock switch 24 a of the interlock detection unit 24. The interlock switch 24a is turned on by the mechanical operation of the shift lever when the shift lever is operated to the N range or the P range in order to ensure a safe state at the time of the first start. It is configured to energize.

  The second switch 27 is configured to turn on the operation switch 25 when the second start condition is satisfied even when the first switch 26 is in the OFF state. Specifically, the second switch 27 is configured by the interlock relay drive line 27a and the first switch 26, one end of which is connected to the second control unit 6 and the other end of which is connected to the other end of the first coil portion 26b. is doing. That is, even when the interlock switch 24a is in the OFF state, it is possible to energize the first coil portion 26b by a command from the second control unit 6, thereby forming a pseudo state of interlock release.

  The automatic stop / restart control unit 62 automatically stops the engine 2 when a predetermined automatic stop condition is satisfied while the vehicle 1 is traveling, and automatically restarts the engine 2 when a predetermined automatic restart condition is satisfied. It is configured to make it. The automatic stop condition and the automatic restart condition are the same as those in the first embodiment.

  The third control unit 7 controls the brake pressure of each wheel by the ABS valve unit 28 provided for each brake mechanism of each wheel, and controls the braking force of each wheel so that each wheel is not locked. An automatic brake control unit 71 that controls the ABS valve unit 28 is provided in the third control unit 7.

  The automatic brake control unit 71 controls the target braking force during idle stop braking based on the detected value of the brake fluid pressure sensor 19 and a predetermined target value. The target braking force is equal to the creep force generated when the engine 2 is started. When the road gradient is equal to or greater than a predetermined value, the target braking force is corrected so that the braking force increases in proportion to the gradient rate of the road gradient. The ABS valve unit 28 is adjusted and controlled.

Next, the operation and effect of the present idle stop start control device according to the second embodiment will be described.
Like the first embodiment, since the starter circuit unit 23 is provided, the starter circuit unit 23 is operated by the first switch 26 that operates based on the detection result of the interlock detection unit 24 that improves safety and the automatic stop / restart control unit 62 that improves fuel consumption. The starter motor 3 can be operated under the respective operating conditions by the second switch 27.

  In addition, since the interlock relay drive line 27a connected to the other end of the first coil portion 26b is provided, the operation of the second switch 27 is given priority over the first switch 26 that operates under the interlock condition at the time of automatic restart. Can be made. As a result, automatic restart can be performed without performing an interlock release operation, ensuring safety at start-up and driving safety, idle stop start control, interlock control, and authentication code verification control. Can be coordinated and controlled.

  Further, since the one end side line 25c of the actuating coil portion 25b is connected to the second control unit 6, the circuit for starting the starter motor 3 is composed of the actuating switch 25 and the second control unit 6 independent of other mechanisms. And a simple circuit configuration.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above embodiment, the first switch has been described as having a relay structure. However, it is sufficient that the first switch has at least a relay function, and the first switch is configured by a transistor or an FET (Field Effect Transistor). May be.

2] In the above-described embodiment, an example in which the first control unit and the second control unit are provided has been described. However, the idle stop start control and the authentication code verification control may be configured by a single unit.

3] Although the example of the AT vehicle has been described in the above embodiment, the present invention can also be applied to the MT vehicle. When applied to an MT vehicle, the automatic stop condition includes all items of clutch-off, neutral gear, and zero vehicle speed, and the automatic restart condition is depression of the clutch pedal. Further, the interlock condition is that the clutch cut switch is turned on, that is, the clutch pedal is depressed.

4) In addition, those skilled in the art can implement the present invention in various forms added with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

1 is a block diagram of an idle stop start control device according to Embodiment 1 of the present invention. FIG. 1 is a circuit diagram of a principal part of an idle stop start control device according to Embodiment 1. FIG. 3 is a flowchart of an idle stop start control process according to the first embodiment. FIG. 6 is a circuit diagram of a main part of an idle stop start control device according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine 3 Starter motor 23 Starter circuit part 24 Interlock detection part 25 Actuation switch 26 1st switch 26a 1st switch part 26b 1st coil part 27 2nd switch 27a Interlock relay drive line 28 ABS valve unit 51 Authentication code Verification unit 61 Starter control unit 62 Automatic stop / restart control unit 71 Automatic brake control unit

Claims (4)

An authentication code verification means for determining whether or not the authentication code of the portable device carried by the passenger matches the authentication code stored on the vehicle side, an interlock detection means for detecting a safe state at the time of starting the vehicle, and this interlock Starter control means for permitting the engine to start on the condition that the safety state is detected by the lock detection means and the authentication code matching by the authentication code collating means, and when the predetermined automatic stop condition is satisfied, the engine is automatically stopped, An idle stop start control device for a vehicle having an automatic stop / restart control means for automatically restarting the engine when a predetermined automatic restart condition is satisfied,
A starter circuit means connected to the starter control means and provided with an operation switch for operating the starter motor in an ON state;
The starter circuit means includes a first switch means for turning on the operation switch based on a detection result of the interlock detection means, and an automatic restart condition of the engine even when the first switch means is in an OFF state. And a second switch means for turning on the operation switch when it is established.   2. The idle stop start control device for a vehicle according to claim 1, wherein the first switch means is constituted by relay means for turning on the operation switch. Having an automatic brake control means for maintaining the stop state of the vehicle,
3. The idle stop start control device for a vehicle according to claim 1 or 2, wherein when the automatic brake control means is in operation, the second switch means turns on the operation switch. An authentication code collating unit for determining whether or not the authentication code of the portable device carried by the occupant matches the authentication code stored on the vehicle side, and the safety state at the start of the vehicle is detected; When the authentication code matches, the first control unit that starts the starter motor of the engine, and when the predetermined automatic stop condition is satisfied, the engine is automatically stopped and when the predetermined automatic restart condition is satisfied, the engine An idle stop start control device for a vehicle having a second control unit for automatically restarting
An idle stop start control device for a vehicle, wherein when the automatic restart condition of the engine is satisfied, the automatic restart by the second control unit is prioritized over the control by the first control unit.