JP5177544B2 - Vehicle idle stop start control device - Google Patents

Description

  The present invention relates to an idle stop start control device for a vehicle capable of cooperatively controlling an idle stop start mechanism and an interlock mechanism that mechanically detects a safe state at the time of engine start.

  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 a passenger and a vehicle-side transmission / reception device (on-vehicle device) mounted on the vehicle. When the ID code transmitted from the portable device is authenticated as a regular ID code on the vehicle side, the engine is allowed to start when the occupant presses the engine start button.

  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

  Normally, in SKE, after the ID code is verified, the occupant starts the engine by pressing a push-type engine start button. In other words, the start button performs a first operation of transmitting a vehicle power-on and an engine start command by a push operation when the vehicle is in a stopped state, and turning off the vehicle power and the engine by a similar push operation in a vehicle operation state. It is a highly convenient specification for executing the second operation for transmitting a stop command.

  In a vehicle including the ISS and SKE described above, for example, when a vehicle is parked in a parking lot, an occupant is automatically operated by an idle stop and then a vehicle that is operated by pushing a start button. The power is turned off (third operation), so-called complete stop of the vehicle is performed. However, in the case of a vehicle equipped with the function by the third operation, the following problem newly occurs.

  In other words, the ISS automatically stops the engine regardless of the occupant's operation when the automatic stop condition is satisfied. Therefore, the occupant who drives the vehicle that is not used or the idol stop function is not automatically When stopped, hurry to press the start button. Then, in the case of a vehicle equipped with the third operation, the power is turned off and the vehicle is completely stopped. Such a situation may interfere with smooth running including other vehicles when there is a following vehicle at the intersection, and the passenger may become more upset, such as pressing the start button again, which may cause safety problems. There is.

  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 engine is allowed to start only when the engine is operated, and the MT vehicle is configured to permit the engine to start only when operated in the clutch cut state.

  In order to ensure the safety of the vehicle, it is desirable to perform cooperative control by mounting the interlock system on a vehicle equipped with the ISS described above. However, normal engine start and restart from idle stop have different environments when executed even when the same engine is started, and it is difficult to perform coordinated control by balancing the two. .

  Specifically, in a vehicle equipped with an ISS and an interlock system, when the engine is automatically stopped from the idling stop as described above, when the start button is pressed, the power is turned off. The engine start is interlocked by the operation of the interlock system. In other words, since the automatic stop condition is an execution condition with one travel range, even if the power of the vehicle can be turned off by operating the start button, the travel range is the P range or N range, so-called normal engine start. The engine cannot be restarted unless an operation for switching to the state is performed. Such complicated operation addition during traveling leads to a decrease in traveling safety.

  An object of the present invention is to provide an idle stop start control device for a vehicle that can improve both safety at the time of starting and traveling while maintaining improvement in fuel consumption.

  The idle stop start control device for a vehicle according to the present invention includes a first operation for transmitting a vehicle power supply and an engine start command by a predetermined operation of the occupant in a vehicle stop state, and a predetermined operation of the occupant in the vehicle operation state by the predetermined operation of the vehicle power source. An engine start switch capable of executing a stop and a second operation for transmitting an engine stop command, an interlock detection means for detecting a safe state at the time of starting the vehicle, a detection of a safe state by the interlock detection means, and the engine Starter control means for permitting engine start on the condition of the engine start command by the first operation of the start switch, and when the predetermined automatic stop condition is satisfied, the engine is automatically stopped and the predetermined automatic restart condition is And automatic stop / restart control means for automatically restarting the engine when established.

The invention of claim 1, wherein the engine start switch, when the occupant when the engine is stopped by the automatic stop condition is satisfied has performed the predetermined operation, the third operation is feasible to perform the stop of the vehicle power source, the starter control means have a restart control means for permitting the restarting of the supply and the engine of the vehicle power supply based on the occupant of the predetermined operation after the third operation of the engine start switch, the restart control means, said It is characterized by having a switching means capable of switching to an interlock release pseudo state in which the detection state of the interlock detection means is invalidated and the vehicle is in a safe state .

  In the first aspect of the invention, the third operation can be executed by the engine start switch, so that the vehicle can be smoothly stopped from the idle stop. Further, since the restart control means is provided, after the third operation of the engine start switch, it is possible to supply the vehicle power and restart the engine based on the predetermined operation by the occupant without using the interlock detection means.

  According to a second aspect of the present invention, in the first aspect of the invention, there is provided an authentication code verification means 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. The starter control means starts the engine when the vehicle is stopped on the condition of detection of a safe state by the interlock detection means, coincidence of the authentication code by the authentication code verification means, and an engine start command by the first operation. It is characterized by permission.

  The invention of claim 3 has the brake operation detection means for detecting the operation of the brake pedal by the occupant in the invention of claim 1 or 2, and when the brake operation is detected by the brake operation detection means, The restart control means operates.

According to a fourth aspect of the present invention, there is provided the automatic brake according to any one of the first to third aspects, wherein a predetermined brake pressure is applied to the vehicle and the vehicle is kept stopped when the engine is stopped when the automatic stop condition is satisfied. It has a control means, and when the brake pressure of this automatic brake control means is more than a predetermined value, the restart control means operates.

The invention according to claim 5 is the invention according to claim 4 , wherein the automatic brake control means increases the brake pressure when the brake pressure is less than a predetermined value.

The invention of claim 6 has the start operation detecting means for detecting the start operation of the vehicle by the occupant according to the invention of claim 4, and when the start operation of the vehicle is detected by the start operation detecting means, The automatic brake control means releases the brake pressure that maintains the stop state of the vehicle.

  According to the first aspect of the present invention, it is possible to improve both the safety at the time of starting and the time of traveling while maintaining the improvement in fuel consumption.

In other words, after the third operation of the engine start switch, the vehicle power can be supplied and the engine can be restarted based on a predetermined operation by the occupant without using the interlock detection means. Even if it does, engine restart becomes possible smoothly. That is, it is possible to ensure the safety at the time of start and the safety at the time of traveling by the interlock mechanism while maintaining the fuel efficiency improvement by the idle stop start mechanism.
In addition, since there is a switching means that can be switched to an interlock release pseudo state in which the detection state of the interlock detection means is invalidated and the vehicle is in a safe state, the interlock detection means can be easily changed without significant changes. With this configuration, the idle stop start mechanism and the interlock mechanism can be cooperatively controlled.

  According to the invention of claim 2, when the vehicle is stopped, the starter control means detects the safety state by the interlock detection means, matches the authentication code by the authentication code verification means, and starts the engine by the first operation. The engine is allowed to start on the condition that it is possible to achieve both theft prevention and safety while maintaining fuel efficiency.

  According to the third aspect of the present invention, when the brake operation is detected by the brake operation detecting means, the restart control means is operated, so that the engine can be restarted while ensuring safety.

According to the fourth aspect of the present invention, the engine has an automatic brake control means for applying a predetermined brake pressure to the vehicle and maintaining the stop state of the vehicle when the engine is stopped due to the establishment of the automatic stop condition. When the pressure is equal to or higher than a predetermined value, the restart control means operates, so that the engine can be restarted while ensuring safety.

According to the invention of claim 5 , since the automatic brake control means increases the brake pressure when the brake pressure is less than a predetermined value, the engine can be restarted with further safety.

According to the invention of claim 6 , when the start operation of the vehicle is detected by the start operation detecting means, the automatic brake control means cancels the brake pressure for maintaining the stop state of the vehicle. The engine can be restarted while ensuring safety.

  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 connected to the starter motor 3 through 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 of a brake fluid pressure sensor 19 for detecting the engine, an accelerator switch 20 which is turned on by depressing an accelerator pedal, an engine start switch 22 for detecting an operation of a start button 22a pushed by a passenger when the engine 2 is started, a door A signal of the door opening / closing switch 29 for detecting opening / closing of the door is input.

  The first control unit 5 includes an authentication code verification unit 51 (authentication code verification unit) and a start switch determination unit 52 inside. The 1st control unit 5 is comprised so that it may function as a vehicle side transmission / reception apparatus (vehicle equipment) in which radio | wireless communication between the portable devices 9 is possible.

  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 inputs information from the engine start switch 22, the door opening / closing switch 29, the door request switch (not shown), the receiving antenna, and the like, and sends control signals to the door lock actuator, the meter unit, the vehicle outside buzzer, and the like. It is configured to output.

  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 start switch determination unit 52 receives an on / off signal of the engine start switch 22 that detects a push operation of the start button 22a installed on the instrument panel. The start switch determination unit 52 is configured to control each of the control units 5 to 7, the starter motor 3 and the like, a radio (not shown), etc. In addition to supplying power to the ACC power supply related equipment, a first operation for transmitting a start command of the engine 2 to the second unit 6 is performed.

  In addition, the start switch determination unit 52 receives the off signal based on the push operation of the start button 22a in the driving state of the vehicle 1, and each member of the control units 5 to 7, the starter motor 3 and the ACC power supply related devices such as the radio. A second operation for transmitting a power supply stop to the engine and a command to stop the engine 2 is performed.

  Furthermore, the start switch determination unit 52 receives each of the control units 5 to 7, the starter motor 3, and other members of the ACC power source related to the radio and the like by receiving an off signal based on the push operation of the start button 22 a during the idle stop described later. The power supply to the device is stopped (third operation). In addition, after the third operation, when a push operation of the start button 22a is further performed, power is supplied to each control unit 5-7, each member such as the starter motor 3, and ACC power-related equipment such as a radio, After satisfying a predetermined execution condition, a fourth operation similar to the first operation for transmitting a start command for the engine 2 to the second unit 6 is performed.

  That is, as shown in FIG. 2, when the occupant pushes the start button 22a while the vehicle 1 is stopped, the engine start switch 22 is connected, resulting in the unit relay circuit R1, the ACC relay circuit R2, and the motor relay circuit R3. Is turned on, and power is supplied from the battery 21a via the power lines C1 to C3. Reference numerals 21b, 21c, and 21d denote power sources, respectively.

  Further, when the occupant pushes the start button 22a in the driving state of the vehicle 1, as a result of disconnection of the engine start switch 22, the unit relay circuit R1, the ACC relay circuit R2, and the motor relay circuit R3 are turned off, and the battery The power supply is stopped from the power supply line C1 to C3 from 21a. When only the ACC power supply is operated, the ACC relay circuit R2 is turned on, and the unit relay circuit R1 and the motor relay circuit R3 are turned off.

  The portable device 9 carried by the occupant includes 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 controller 61 (starter controller) that controls the operation of the starter 3 and an automatic stop / restart controller 62 (automatic stop / restart controller) that controls idle stop and restart of the engine 2. And controls the fuel injection and ignition of the engine 2.

  The starter control unit 61 is electrically connected to the starter circuit unit 23. The starter control unit 61 starts the engine 2 from the start switch determination unit 52 on the condition that the detection of the safe state by the interlock detection unit 24 (interlock detection means) and the coincidence of the authentication code by the authentication code verification unit 51 are satisfied. In response to the command, a signal indicating whether or not to start is 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, when the engine starting condition is satisfied from the state in which only the operation of the engine 2 is stopped while the auxiliary machinery is operating. The second switch 27 (switching means) is used 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 25a is connected to the battery 21a via the power supply circuit C3, and the other end of the operation switch unit 25a is connected to the starter motor 3. Further, one end of the operating coil portion 25b is connected to the battery 21a via the power circuit C3. When the actuating coil portion 25b is energized, the actuating switch portion 25a is turned on, and power is supplied to the starter motor 3 from the battery 21a.

  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 unit 26 a is connected to the other end of the operating coil unit 25 b, and the other end of the first switch unit 26 a is connected to the first control unit 6. One end of the first coil portion 26b is connected to the battery 21a via the power circuit C3. 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. 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.

  In addition, a restart control unit 63 is provided inside the starter control unit 61. The restart control unit 63 performs a push operation of the occupant start button 22a after a complete stop of the vehicle 1 by the third operation, for example, when the start button 22a is accidentally pressed during an idle stop. It is comprised so that the starting command of the engine 2 based on 4 operation | movement may be permitted.

  The start command permission of the engine 2 by the restart control unit 63 is established at the time of the third start that the brake pressure (described later) is equal to or higher than a predetermined pressure, the brake pedal is operated, and the start button 22a is pushed. This is possible. In other words, the start switch determination unit 52 supplies power by operating the brake pedal and pushing the start button 22a, but the start command for the engine 2 is not permitted until the brake pressure exceeds a predetermined pressure. . Note that selection of a travel range may be added to the execution condition.

  The state in which the brake pedal is operated refers to a state in which the brake switch 12 detects the depression of the brake pedal by an occupant and a brake pressure is generated. The detection of the brake pedal operation state may be performed as long as it can detect the operation of the occupant, and another sensor such as a brake pedal stroke sensor can be substituted.

  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 when a predetermined automatic restart condition is satisfied, The engine 2 is configured to automatically restart.

The predetermined automatic stop condition at the time of idling stop is satisfied when all of the following items are met.
(1) The detected value of the vehicle speed sensor 11 is zero (2) The brake pedal is depressed and the detected value of the brake switch 12 is turned on (3) The detected value of the shift position by the inhibitor switch 13 is the travel range (4) The engine water temperature sensor 14 (5) The detected value of the oil temperature sensor 15 of the automatic transmission is equal to or greater than the predetermined value. (6) The detected value of the hydraulic sensor 16 of the automatic transmission is equal to or greater than the predetermined value. The detected value is a predetermined value or more. (8) The absolute value of the detected value of the booster negative pressure sensor 18 is a predetermined value or more. In this embodiment, all the items (1) to (8) are satisfied. In order to simplify the control system, it is possible to set at least the establishment of (1) to (3) as 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 an automatic restart condition. When the automatic restart condition is satisfied, an operation command for the starter motor 3 is sent to the starter control unit 13 and to the engine 2. 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 at the time of idling stop and to maintain the stop state at the time of the third start. The braking by the ABS valve unit 28 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 timing to the start operation intention by the occupant, that is, the detection timing of turning on the accelerator switch 20 (start operation detecting means).

  The automatic brake control unit 71 controls the target braking force at the time of idling stop braking based on the detection value of the brake fluid pressure sensor 19 and a predetermined target pressure. 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. ing. Based on this target braking force, the ABS valve unit 28 performs adjustment control so that a predetermined brake pressure is applied to the vehicle 1 during idle stop.

Next, the maintenance of the stopped state of the vehicle 1 at the third start will be described.
When a push operation of the start button 22a is performed during idle stop braking, the start switch determination unit 52 executes the third operation, the vehicle 1 is turned off, and the braking operation by the ABS valve unit 28 is stopped. . When the start button 22a is pushed again in a state where the brake pedal is operated following the third operation, all the power sources of the vehicle 1 are turned on and an engine start command is transmitted.

  The automatic brake control unit 71 sets a target braking force in the same manner as when idling stop braking at the same time when the vehicle 1 is turned on, and applies a predetermined brake pressure to the vehicle 1. When the brake pressure reaches a predetermined target pressure, the restart control unit 63 allows the engine 2 to restart, and the engine is started. Note that the automatic braking by the automatic brake control unit 71 is continued until the on state is detected by the accelerator switch 20. The brake release condition only needs to reflect the occupant's intention to start, and can be substituted by detecting the brake switch 12 being turned off.

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

  First, various signals such as shift range position, vehicle speed, brake switch, etc. are read (S1). This control process is executed every several 100 mmsec when the vehicle 1 is traveling. Next, it transfers to S2 and it is determined whether the portable device 9 exists in a vehicle interior. If the result of the determination in S2 is that the portable device 9 is in the passenger compartment, the process proceeds to S3, and if the portable device 9 is not present in the passenger compartment, the procedure returns to S1. The presence of the portable device 9 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.

  If the idle stop condition is satisfied as a result of the determination in S3, the process proceeds to S4 to determine whether or not the vehicle 1 has completely stopped. Here, the idle stop condition is the establishment of the items (1) to (8) described above. As a result of the determination in S3, when the idle stop condition is not satisfied, the process returns to S1. The complete stop of the vehicle 1 is determined by the fact that the vehicle speed zero has continued for a predetermined time.

  As a result of the determination in S4, when the vehicle 1 is completely stopped, the process proceeds to S5, and the ABS valve unit 28 is operated to execute automatic brake control. If the vehicle 1 is not completely stopped, the determination is continued until the vehicle 1 is completely stopped. After adjusting and controlling the brake fluid pressure of each wheel to the target braking force by the ABS valve unit 28, an idle stop is executed (S6), and the process proceeds to 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.

  In S7, it is determined whether or not the start button 22a is pushed during idle stop. If the push operation is not performed as a result of the determination in S7, the process proceeds to S8, and it is determined whether or not an idle stop restart condition is satisfied. 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, when the idle stop restart condition is not satisfied, the process proceeds to S9, and it is determined whether or not the door is opened and closed. As a result of the determination in S8, when the idle stop restart condition is satisfied, the process proceeds to S11, and the ABS valve unit 28 is operated to execute the automatic brake control.
If the door is opened or closed as a result of the determination in S9, the process proceeds to S10, and it is determined whether or not the portable device 9 is in the vehicle interior. If the result of determination in S9 is that there is no door opening / closing, processing returns to S6.

  As a result of the determination in S10, when the portable device 9 is not in the vehicle interior, the process proceeds to S11. As a result of the determination in S10, when the portable device 9 is in the vehicle interior, the process returns to S6. S9 and S10 are steps for enabling engine restart by a driving occupant assuming that another occupant gets off with the portable device 9 during an idle stop.

  As a result of the determination in S11, when the brake pressure is equal to or higher than the target braking force, the process proceeds to S12, and the automatic stop / restart control unit 62 sends an operation command for the starter motor 3 to the starter control unit 61, and the second switch 27 Is turned on, and a command for executing fuel injection and executing ignition is transmitted to the engine 2. After the starter motor 3 is started (S13), the process proceeds to S14. If the result of determination in S11 is that the brake pressure is less than the target braking force, the ABS valve unit 28 is operated to increase the brake pressure to the target braking force (S17), and the process proceeds to S12.

  As a result of the determination in S14, when the restart of the engine 2 is completed, the process proceeds to S15, and it is determined whether or not the occupant is willing to start. 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. If the engine 2 is not restarted as a result of the determination in S14, the restart is continued.

As a result of the determination in S15, if there is a start intention, the automatic brake control is canceled (S16), and the process returns, and if there is no start intention, the determination of the start intention is continued.
In the present embodiment, the determination of the occupant's intention to start is determined by turning on the accelerator switch 20, that is, a so-called stepping operation. Note that it is also possible to make a determination by determining the operation state from the depression of the brake pedal to the release of the depression.

  If the start button 22a is pushed as a result of the determination in S7, the start switch determination unit 52 stops the power supply to the power supply circuits C1 to C3 (S18), and the vehicle 1 is completely stopped.

In S19, it is determined whether the start button 22a is pushed under a predetermined condition following the third start, that is, the complete stop of the vehicle from the idle stop.
As a result of the determination in S19, when the start button 22a is pushed while the brake pedal is operated, the start switch determination unit 52 supplies power to the power supply circuits C1 to C3 (S20), and the process proceeds to S11. To do. If the result of determination in S19 is No, the process returns to S18.

  In the determination of S19, even when the travel range is selected, if the start button 22a is pushed while the brake pedal is being operated, the process proceeds to S20 and the power can be turned on. In the case of the P range or the N range, since the interlock condition is released, the power is turned on as described above.

Next, the operation and effect of the present idle stop start control device according to the present embodiment will be described.
After the third operation, the vehicle power can be supplied and the engine 2 can be restarted based on the push operation of the occupant start button 22a regardless of the detection result of the interlock detection unit 24. Even if the engine is completely stopped, the engine can be smoothly started without performing the interlock release operation.

  Further, when the vehicle is stopped, the starter control unit 61 detects the safety state by the interlock detection unit 24, matches the authentication code by the authentication code verification unit 51, and the engine start command by the first operation. Since the start is permitted, it is possible to achieve both anti-theft and safety while maintaining fuel efficiency improvement.

  Further, when the brake operation is detected by the brake switch 12, the restart control unit 63 is operated, so that the engine can be restarted while ensuring safety. The restart control unit 63 includes the second switch 27 that switches the detection state of the interlock detection unit 24 to a state in which the safety state of the vehicle 1 is detected, that is, a pseudo state in which a so-called P range or N range is detected. The idling stop start mechanism and the interlock mechanism can be cooperatively controlled with a simple configuration without significantly changing the unit 24.

  When the engine is stopped due to the establishment of the automatic stop condition, an automatic brake control unit 71 is applied to apply a predetermined brake pressure to the vehicle 1 to maintain the stopped state of the vehicle 1, and the brake pressure of the automatic brake control unit 71 is equal to or higher than a predetermined value. At this time, since the restart control unit 63 operates, it is possible to restart the engine while ensuring safety. Furthermore, since the automatic brake control unit 71 increases the brake pressure when the brake pressure is less than a predetermined value, the engine can be restarted with further safety.

  Further, when the occupant's intention to start is detected by the accelerator switch 20, the automatic brake control unit 71 releases the brake pressure that maintains the stop state of the vehicle 1, so that the engine can be restarted while ensuring safety. .

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 embodiment, the example having the first control unit, the second control unit, and the third control unit has been described. However, the idle stop start control, the authentication code verification control, and the automatic brake control can be performed by a single unit. It is also possible to configure.

  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 the above embodiment, an example of the push operation type engine start button has been described. However, the present invention can also be applied to a rotary type operation member.

  5) In the above embodiment, the example in which it is determined whether or not the start button has been pushed under a predetermined condition following the complete stop of the vehicle from the idle stop has been described. The third start can be performed for 10 minutes, and only the normal start can be permitted after a predetermined time.

  6) 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.

It is a block diagram of an idle stop start control device according to an embodiment of the present invention. It is a principal part circuit diagram of the idle stop start control apparatus which concerns on an Example. It is a part of flowchart of the idle stop start control process which concerns on an Example. It is the remainder of the flowchart of the idle stop start control process which concerns on an Example.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine 3 Starter motor 5 1st control unit 6 2nd control unit 7 3rd control unit 20 Accelerator switch 21a Battery 22 Engine start switch 22a Start button 23 Starter circuit part 24 Interlock detection part 25 Actuation switch 26 1st switch 27 Second switch 27a Interlock relay drive line 28 ABS valve unit 51 Authentication code verification unit 52 Start switch determination unit 61 Starter control unit 62 Automatic stop / restart control unit 63 Restart control unit 71 Automatic brake control unit

Claims (6)

A first operation for transmitting a vehicle power supply and an engine start command by a predetermined operation of the occupant in a vehicle stop state and a second operation for transmitting a stop of the vehicle power source and an engine stop command by the predetermined operation of the occupant in the vehicle operation state An engine start switch capable of executing the following: interlock detection means for detecting a safe state at the time of starting the vehicle; detection of a safe state by the interlock detection means; and an engine start command by the first operation of the engine start switch; Starter control means for permitting engine start on condition, and automatic stop that automatically stops the engine when a predetermined automatic stop condition is satisfied and automatically restarts the engine when a predetermined automatic restart condition is satisfied A vehicle idle stop start control device having a restart control means,
The engine start switch is capable of executing a third operation for stopping a vehicle power supply when an occupant performs the predetermined operation when the engine is stopped due to establishment of the automatic stop condition .
The starter control means have a restart control means for permitting the restarting of the supply and the engine of the vehicle power supply based on the occupant of the predetermined operation after the third operation of the engine start switch,
The restart control means includes a switching means capable of switching to an interlock release pseudo state in which the detection state of the interlock detection means is invalidated and the vehicle is in a safe state. Control device. An authentication code verification means for determining whether the authentication code of the portable device carried by the occupant and the authentication code stored on the vehicle side match,
The starter control means permits the engine to be started when the vehicle is stopped, on condition that the safety state is detected by the interlock detection means, the authentication code matches by the authentication code verification means, and the engine start command by the first operation. The vehicle idle stop start control device according to claim 1. Brake operation detection means for detecting the operation of the brake pedal by the occupant,
3. The idle stop start control device for a vehicle according to claim 1, wherein when the brake operation is detected by the brake operation detecting means, the restart control means is operated. An automatic brake control means for maintaining a stop state of the vehicle by applying a predetermined brake pressure to the vehicle when the engine is stopped due to establishment of the automatic stop condition;
The idle stop start control device for a vehicle according to any one of claims 1 to 3 , wherein the restart control means is activated when a brake pressure of the automatic brake control means is a predetermined value or more . 5. The vehicle idle stop start control device according to claim 4 , wherein the automatic brake control means increases the brake pressure when the brake pressure is less than a predetermined value . A start operation detecting means for detecting a start operation of the vehicle by the occupant;
5. The vehicle idle stop according to claim 4 , wherein when the start operation of the vehicle is detected by the start operation detecting means, the automatic brake control means releases the brake pressure for maintaining the stop state of the vehicle. Start control device.