JP5815494B2 - Vehicle control device - Google Patents

Description

  The present invention relates to a vehicle control device that controls the operation of a vehicle air conditioner (hereinafter referred to as an air conditioner) in which a compressor is driven by an internal combustion engine mounted on the vehicle.

  Generally, in a vehicle equipped with an internal combustion engine, a compressor for compressing a cooling medium of an air conditioner is driven by a driving force of the internal combustion engine. In such a vehicle, if the load on the internal combustion engine is large during driving of the compressor, the internal combustion engine may stall (so-called engine stall).

  In order to suppress the occurrence of the engine stall, Patent Document 1 discloses a negative pressure booster that boosts the operating force of the brake using the intake negative pressure of the internal combustion engine, and a negative pressure of the negative pressure booster. There is disclosed an air conditioner control technique that includes a negative pressure sensor that stops or restores the operation of an air conditioner based on a comparison result between a negative pressure value obtained by the negative pressure sensor and a predetermined negative pressure threshold.

JP 2003-104046 A

  However, in the air conditioner control technology according to Patent Document 1, if the negative pressure value is less than the predetermined negative pressure threshold value (the operation of the air conditioner is stopped) and the negative pressure value is stuck abnormally, the air conditioner operation is performed. Since it becomes impossible to return from the stop state, there is a possibility that the atmosphere in the passenger compartment cannot be maintained comfortably. In addition, the above-described problem occurs even when the generated negative pressure temporarily decreases due to an increase in the load of the internal combustion engine.

  The present invention has been made in view of the above circumstances, and for example, even when a sticking abnormality occurs in a state in which the negative pressure value is less than a predetermined negative pressure threshold, the atmosphere in the passenger compartment is comfortably maintained. The purpose is to be able to.

  In order to achieve the above object, the invention according to (1) obtains the negative pressure of a negative pressure booster that boosts the operating force related to braking using the intake negative pressure of an internal combustion engine mounted on a vehicle. Stops the operation of an air conditioner having a negative pressure acquisition unit and a compressor driven by the driving force of the internal combustion engine when a negative pressure value by the negative pressure acquisition unit is smaller than a first negative pressure threshold On the other hand, when the negative pressure value becomes smaller than the first negative pressure threshold value and then becomes larger than the first negative pressure threshold value, a control unit that performs control to restore the operation of the air conditioner And when the state in which the negative pressure value is smaller than the first negative pressure threshold value continues beyond a predetermined waiting time, the control unit determines that the first negative pressure threshold value is A second negative pressure threshold value that is smaller than the second negative pressure threshold value is used by switching. There are, performs control to return from the state of stopping the operation of the air conditioner, the most important feature that.

  According to the invention according to (1), even when a sticking abnormality occurs in the negative pressure value in a state that is smaller than the first negative pressure threshold, the second smaller than the first negative pressure threshold. Since the negative pressure threshold is switched and used, and the operation of the air conditioner is restored from the stopped state, the atmosphere in the passenger compartment can be maintained comfortably.

  The invention according to (2) is the vehicular control device according to (1), in which the control unit performs the first operation after the negative pressure value becomes smaller than the first negative pressure threshold. Control is performed to stop or restore the operation of the air conditioner using the second negative pressure threshold until it becomes larger than the negative pressure threshold of 1.

  According to the invention according to (2), in order to perform control to stop or return the operation of the air conditioner using the second threshold value until the negative pressure value returns to an appropriate range exceeding the first negative pressure threshold value. The operation of the air conditioner can be temporarily restored. Thereby, the atmosphere in a vehicle interior can be maintained as comfortably as possible.

  The invention according to (3) is the vehicle control device according to (1) or (2), in which the second negative pressure threshold is the negative pressure value at the time when the standby time has elapsed. It is characterized in that it is variably set in consideration of a smaller size.

  According to the invention according to (3), the operation of the air conditioner is stopped using the second negative pressure threshold that is variably set in consideration of being smaller than the negative pressure value at the time when the predetermined standby time has elapsed. Alternatively, since the control for returning is performed, the operation of the air conditioner can be reliably returned.

  Moreover, the invention which concerns on (4) is a vehicle control apparatus as described in any one of (1)-(3), Comprising: The said 2nd negative pressure threshold value is the said 2nd negative pressure threshold value. When the control for stopping or returning the operation of the air conditioner is performed, the operation force related to the braking is continuously boosted until the wheels of the vehicle tend to be locked and the ABS device is activated. It is set in consideration of being possible.

  According to the invention according to (4), it is variably set in consideration that the operation force related to braking can be continuously boosted until the wheels of the vehicle become locked and the ABS device operates. Since the control of stopping or returning the operation of the air conditioner is performed using the second negative pressure threshold, sufficient boosting is ensured even with the second negative pressure threshold, thereby reducing the burden on the driver during braking. can do.

  Moreover, the invention which concerns on (5) is a vehicle control apparatus as described in any one of (1)-(4), Comprising: The said negative pressure value is a said 1st negative pressure threshold value as for the said control part. Alternatively, when the operation amount related to braking of the vehicle exceeds a predetermined threshold value, the braking of the vehicle is assisted according to the operation amount related to the braking. It is characterized by performing control for operating a braking assist device.

  According to the invention according to (5), in addition to the effect of maintaining a comfortable interior atmosphere, the negative pressure value is smaller than either the first negative pressure threshold value or the second negative pressure threshold value, and Even when the amount of operation related to braking of the vehicle exceeds a predetermined threshold, an appropriate braking force can be ensured.

  According to the present invention, the atmosphere in the passenger compartment can be maintained comfortably even when a sticking abnormality occurs in a state where the negative pressure value is less than the predetermined negative pressure threshold.

It is a functional block diagram of the control device for vehicles concerning the embodiment of the present invention. It is a state transition diagram with which it uses for operation | movement description of the control apparatus for vehicles which concerns on embodiment of this invention. It is explanatory drawing showing the relationship of the time transition of the negative pressure value which concerns on the negative pressure chamber of a booster, the 1st and 2nd negative pressure threshold value, the on-off operation of an air-conditioner, and the time transition of an intake manifold pressure.

Hereinafter, a vehicle control device 11 according to an embodiment of the present invention will be described in detail with reference to the drawings.
In the description of the embodiment of the present invention, “negative pressure” refers to the pressure on the vacuum side with reference to atmospheric pressure. When expressing the degree of “negative pressure”, the negative pressure near the atmospheric pressure is expressed as “small negative pressure”, and the negative pressure near the vacuum is expressed as “large negative pressure”. To do.

[Configuration of the vehicle control device 11 according to the embodiment of the present invention]
First, the configuration of the vehicle control device 11 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a functional block diagram of a vehicle control device 11 according to an embodiment of the present invention.

  A vehicle control device 11 according to an embodiment of the present invention is provided in a vehicle (not shown) together with an internal combustion engine 13 such as a reciprocating engine and a brake device 15.

  As shown in FIG. 1, the internal combustion engine 13 includes an intake manifold (intake pipe) 17 for introducing air and fuel into the internal combustion engine 13, and an exhaust that guides exhaust gas from the internal combustion engine 13 to a muffler (not shown). A pipe (exhaust pipe) 19 is connected in communication.

  As shown in FIG. 1, the brake device 15 includes a brake pedal 21, a booster 23 corresponding to the “negative pressure booster” of the present invention, and a master cylinder 25.

  The brake pedal 21 is an operation member used when a driver who tries to brake the vehicle performs a stepping operation. The booster 23 has a function of using the intake negative pressure of the internal combustion engine 13 to boost and input to the master cylinder 25 the force by which the driver depresses the brake pedal 21 (operation force related to braking). The master cylinder 25 has a function of converting an operation force related to braking boosted by the booster 23 into hydraulic pressure and inputting the hydraulic pressure to a hydraulic system (not shown) that generates brake fluid pressure for each wheel.

  The brake pedal 21 is provided with, for example, a brake sensor 26 on the rotation shaft portion 21b of the arm 21a. The brake sensor 26 has a function of detecting an operation amount and an operation direction of the brake pedal 21 and sending the detected brake operation signal to the vehicle control device 11.

  The intake manifold (intake pipe) 17 and the negative pressure chamber 23 a of the booster 23 are connected to each other via a pipe 27. A check valve 29 and a negative pressure sensor 31 are provided in the middle of the pipe 27.

  The check valve 29, which is a one-way valve, closes when the booster pressure, which is the internal pressure of the negative pressure chamber 23a, is larger than the intake manifold pressure generated in the intake manifold (intake pipe) 17, thereby increasing the booster pressure to a large negative value. While maintaining the pressure, the opening operation is performed when the booster pressure is smaller than the intake manifold pressure, so that the intake manifold pressure is introduced into the booster 23 and the booster pressure has the same function as the intake manifold pressure.

  The negative pressure sensor 31 is provided between the check valve 29 and the negative pressure chamber 23 a in the pipe 27. The negative pressure sensor 31 has a function of detecting a booster pressure that is an internal pressure of the negative pressure chamber 23 a and sending the detected booster pressure signal (negative pressure value) Pvs to the vehicle control device 11.

  As shown in FIG. 1, an air conditioner 33 and a VSA (Vehicle Stability Assist) device 41 are connected to the vehicle control device 11.

  The air conditioner 33 has a function of adjusting the atmosphere in the vehicle interior by blowing out air of a preset temperature toward the vehicle interior. The air conditioner 33 includes members such as an evaporator 37, a compressor 39, a condenser 41, and an expansion valve 43 that constitute a known refrigeration cycle. The evaporator 37 has a function of absorbing heat by vaporizing and expanding a low-temperature and low-pressure liquid refrigerant. The compressor 39 has a function of discharging a high-temperature / high-pressure gas refrigerant by compressing the low-temperature / low-pressure gas refrigerant. The condenser 41 has a function of cooling the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 39 to remove heat and liquefy it. The expansion valve 43 has a function of reducing temperature and pressure by rapidly adiabatically expanding a high-temperature / high-pressure liquid refrigerant. The liquid refrigerant that has become low temperature and low pressure in this manner is returned to the evaporator 37.

  The VSA device 35 has a function of supporting the stabilization of the behavior of the vehicle based on the deviation between the target yaw rate and the actual yaw rate, the brake fluid pressure, and the like.

  As shown in FIG. 1, the vehicle control device 11 according to the embodiment of the present invention includes a negative pressure acquisition unit 45 and a control unit 47.

  The negative pressure acquisition unit 45 has a function of acquiring the negative pressure value Pvs related to the booster pressure from the negative pressure sensor 31.

  When the negative pressure value Pvs related to the booster pressure from the negative pressure sensor 31 becomes smaller than the first negative pressure threshold value Pth1, the control unit 47 stops the operation of the air conditioner 33, while the negative pressure value Pvs. Has a function of performing control to restore the operation of the air conditioner 33 when it becomes smaller than the first negative pressure threshold value Pth1 after becoming smaller than the first negative pressure threshold value Pth1.

  In addition, when the state in which the negative pressure value Pvs is smaller than the first negative pressure threshold value Pth1 continues beyond the predetermined standby time Tth_chg, the control unit 47 compares the first negative pressure threshold value Pth1 with the first negative pressure threshold value Pth1. The small second negative pressure threshold value Pth2 is switched and used, and with this, control for returning the operation of the air conditioner 33 from the stopped state is performed.

  The first negative pressure threshold value Pth1 is set in advance considering that the negative pressure in the negative pressure chamber 23a of the booster 23 is a negative pressure sufficient to obtain a braking force necessary for braking the vehicle. Specifically, for example, the first negative pressure threshold value Pth1 is written in a storage area of the control unit 47 so as to be readable as necessary.

  On the other hand, the second negative pressure threshold value Pth2 is variably set based on the negative pressure value Pvs at the time when the predetermined standby time Tth_chg has elapsed (see time t3 in FIG. 3). Specifically, for example, the control unit 47 takes into consideration that the negative pressure value Pvs at time t3 (see FIG. 3) is used as a reference and shifts to the atmospheric pressure side by a predetermined value Pmg. Pth2 is variably set.

  When the second negative pressure threshold value Pth2 is variably set to the atmospheric pressure side with reference to the negative pressure value Pvs at time t3 (see FIG. 3) as described above, the driver's braking operation may be hindered. must not. Therefore, a lower limit value is set for the second negative pressure threshold Pth2. The lower limit value related to the second negative pressure threshold value Pth2 is the ABS when the wheel of the vehicle tends to be locked when the control of stopping or returning the operation of the air conditioner 33 is performed using the second negative pressure threshold value Pth2. (Antilock Brake System) It is set as appropriate in consideration that the operation force related to braking can be continuously increased until the device is activated.

  Further, the control unit 47 sets the second negative pressure threshold value until the negative pressure value Pvs becomes larger than the first negative pressure threshold value Pth1 after the negative pressure value Pvs becomes smaller than the first negative pressure threshold value Pth1. Control for stopping or returning the operation of the air conditioner 33 is performed using Pth2.

  Further, the control unit 47 determines that the negative pressure value Pvs is smaller than either the first negative pressure threshold value Pth1 or the second negative pressure threshold value Pth2, and the operation amount related to braking of the vehicle detected by the brake sensor 26. When the value exceeds a predetermined threshold value, control is performed to activate the VSA device 35 (corresponding to the “braking assist device” of the present invention) 35 that assists the braking of the vehicle in accordance with the operation amount related to the braking.

  The predetermined threshold value related to the operation amount related to vehicle braking is appropriately set in consideration of, for example, the operation amount of the brake pedal 21 (operation amount related to vehicle braking) when the driver suddenly applies the brake. .

  A vehicle control device 11 according to an embodiment of the present invention includes a microcomputer (not shown) (hereinafter referred to as “microcomputer”) including, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. .). The microcomputer reads and executes a program stored in the ROM, and operates to perform execution control related to various functions including a negative pressure acquisition function, an air conditioner control function, and a braking control function of the vehicle control device 11. .

  When the vehicle control device 11 according to the embodiment of the present invention configured as described above selectively sets whether to enable or disable the air conditioner control function or the braking control function. A changeover switch (not shown) used is provided. In the following description, unless otherwise specified, the description will proceed assuming that the changeover switch for enabling the air conditioner control function and the brake control function is set.

[Operation of the vehicle control device 11 according to the embodiment of the present invention]
Next, operation | movement of the control apparatus 11 for vehicles which concerns on embodiment of this invention is demonstrated with reference to FIG. 2 and FIG. FIG. 2 is a state transition diagram for explaining the operation of the vehicle control apparatus according to the embodiment of the present invention. FIG. 3 shows the time transition of the negative pressure value Pvs related to the negative pressure chamber 23a of the booster 23, the first and second negative pressure thresholds Pth1 and Pth2, the on / off operation of the air conditioner 33, and the time transition of the intake manifold pressure. It is explanatory drawing showing a relationship.

  When an ignition switch (not shown) is turned on, the vehicle control device 11 is activated, and the first negative pressure threshold value Pth1 is set as the negative pressure threshold value Pth to the vehicle control device 11 in step S11 shown in FIG. (See FIG. 3) is initialized.

  A node N1 illustrated in FIG. 2 represents a state in which the air conditioner is normally on in the vehicle control device 11. The normal air conditioner on state is a state maintained when the negative pressure value Pvs satisfies the following continuation condition. That is, in the normal air conditioner ON state, at the edge E11 shown in FIG. 2, the negative pressure value Pvs is larger than the first negative pressure threshold value Pth1, or the negative pressure value Pvs is the first negative pressure threshold value Pth1. When the following condition is satisfied (see time t1 in FIG. 3), when the continuation condition that the continuation time Twt does not exceed the air conditioner cut-off time Tac_off (see FIG. 3) is satisfied (the normal conditioner is turned on) State is maintained.

A node N2 shown in FIG. 2 represents a state in which the air conditioner is normally off in the vehicle control device 11. The normal air conditioner off state is a state where the normal air conditioner on state is transitioned when the negative pressure value Pvs does not satisfy the continuation condition. That is, in the normal air conditioner on state, when the negative pressure value Pvs becomes equal to or less than the first negative pressure threshold value Pth1 at the edge E12 shown in FIG. Sometimes, transition to the normal air conditioner off state (see time t2 in FIG. 3).
Note that the air conditioner cut-off time Tac_off can be omitted, for example, when the negative pressure generated by the internal combustion engine 13 is lowered and a sufficient negative pressure cannot be secured. In this case, when the negative pressure value Pvs becomes equal to or less than the first negative pressure threshold value Pth1, a transition from the normal air conditioner on state to the normal air conditioner off state is made.

  However, the normal air conditioner off state transitions to the normal air conditioner on state when the negative pressure value Pvs becomes larger than the first negative pressure threshold value Pth1 at the edge E13 shown in FIG.

  In short, at the normal time when the negative pressure value Pvs is not abnormally fixed, the vehicular control device 11 repeats the state transition between the node N1 and the node N2 shown in FIG. 2 (see edges E12 and E13 shown in FIG. 2). .

  When the negative pressure value Pvs becomes equal to or less than the first negative pressure threshold value Pth1, if the duration Twt exceeds the threshold switching time Tth_chg (see FIG. 3) (see time t3 in FIG. 3), the steps shown in FIG. In S12, the second negative pressure threshold value Pth2 (see FIG. 3) is switched for the vehicle control device 11 as the negative pressure threshold value Pth. Thereby, as shown in FIG. 3, the negative pressure threshold value Pth is switched from the first negative pressure threshold value Pth1 to the second negative pressure threshold value Pth2 which is smaller than the first negative pressure threshold value Pth1.

  A node N3 illustrated in FIG. 2 represents a state in which the air conditioner is on during the abnormality in the vehicle control device 11. The abnormal air conditioner on state is a state that occurs when, for example, a sticking abnormality occurs in the negative pressure value Pvs, and when the negative pressure value Pvs becomes larger than the second negative pressure threshold value Pth2, This is a state in which the air conditioner is switched from the normal state. That is, the normal air conditioner off state transitions to the abnormal air conditioner on state when the negative pressure value Pvs becomes larger than the second negative pressure threshold value Pth2 at the edge E14 shown in FIG. 3 at time t3).

  A node N4 shown in FIG. 2 represents a state in which the air conditioner is off at the time of abnormality in the vehicle control device 11. The abnormal air conditioner off state is, for example, a state that occurs when a sticking abnormality occurs in the negative pressure value Pvs, and when the negative pressure value Pvs becomes equal to or less than the second negative pressure threshold value Pth2, This is a state where the air conditioner is turned on. That is, the abnormal air conditioner on state transitions to the abnormal air conditioner off state when the negative pressure value Pvs becomes equal to or lower than the second negative pressure threshold value Pth2 at the edge E15 shown in FIG.

  However, the abnormal air conditioner off state transitions to the abnormal air conditioner on state when the negative pressure value Pvs becomes larger than the second negative pressure threshold value Pth2 at the edge E16 shown in FIG.

  For example, when the negative pressure value Pvs is abnormal, the vehicle control device 11 uses the second negative pressure threshold value Pth2 tentatively set between the node N3 and the node N4 shown in FIG. The state transition at (see edges E15 and E16 shown in FIG. 2) is repeated.

  It should be noted that the air conditioner on state at the time of abnormality is the same as that at the edge E17 shown in FIG. 2 when the negative pressure value Pvs becomes larger than the first negative pressure threshold value Pth1, similarly to the edge E13. Transition to the state.

[Operation and Effect of the Vehicle Control Device 11 According to the Embodiment of the Present Invention]
Next, the effect of the vehicle control device 11 according to the embodiment of the present invention will be described.
The vehicle control device 11 according to the embodiment of the present invention uses a negative pressure of a booster (negative pressure booster) 23 that boosts an operating force related to braking using an intake negative pressure of an internal combustion engine 13 mounted on the vehicle. And the compressor 39 driven by the driving force of the internal combustion engine 13 when the negative pressure value Pvs by the negative pressure acquisition unit 45 is smaller than the first negative pressure threshold value Pth1. The operation of the air conditioner 33 is stopped when the negative pressure value Pvs becomes smaller than the first negative pressure threshold value Pth1 and then becomes larger than the first negative pressure threshold value Pth1. And a control unit 47 that performs control to restore the.

  When the state where the negative pressure value Pvs is smaller than the first negative pressure threshold value Pth1 continues beyond a predetermined standby time (threshold switching time Tth_chg), the control unit 47, as shown in FIG. A second negative pressure threshold value Pth2 that is smaller than the first negative pressure threshold value Pth1 is used, and based on the second negative pressure threshold value Pth2, control for returning the operation of the air conditioner 33 from the stopped state is performed.

According to the vehicle control device 11 according to the embodiment of the present invention, even if a sticking abnormality occurs in the negative pressure value Pvs in a state smaller than the first negative pressure threshold Pth1, the first negative pressure The second negative pressure threshold value Pth2 that is smaller than the threshold value Pth1 is used, and based on the second negative pressure threshold value Pth2, the operation of the air conditioner 33 is restored from the stopped state. be able to.
Note that when the generated negative pressure temporarily decreases due to an increase in the load on the internal combustion engine 13, the second negative pressure threshold Pth2 that is smaller than the first negative pressure threshold Pth1 is the same as described above. Since the operation of the air conditioner 33 is returned from the stopped state based on the second negative pressure threshold value Pth2, the atmosphere in the passenger compartment can be maintained comfortably.

  Further, when the abnormality in fixing the negative pressure value Pvs is resolved, it is possible to appropriately perform control for stopping or returning the operation of the air conditioner 33. Similarly, when the temporary decrease in the generated negative pressure due to an increase in the load on the internal combustion engine 13 is resolved, it is possible to appropriately perform control for stopping or returning the operation of the air conditioner 33.

  In addition, the state in which the negative pressure value Pvs is smaller than the first negative pressure threshold value Pth1 indicates a predetermined standby time (threshold switching time Tth_chg; for example, a predetermined time length that can be changed as appropriate, such as 5 seconds). In the case of continuing beyond this, as shown in FIG. 3, the second standby pressure threshold Pth2 that is smaller than the first negative pressure threshold Pth1 is used to return the air conditioner 33 from the stopped state, so that the standby Until the time elapses, recovery of the negative pressure that has temporarily decreased (decreased) can be achieved, and the accuracy of returning the air conditioner 33 from the stopped state can be increased.

  In the vehicle control device 11 according to the embodiment of the present invention, the control unit 47 compares the negative pressure value Pvs with the first negative pressure threshold value Pth1 after the negative pressure value Pvs becomes smaller than the first negative pressure threshold value Pth1. A configuration is adopted in which control for stopping or returning the operation of the air conditioner 33 is performed using the second negative pressure threshold value Pth2 until it becomes larger.

  According to the vehicle control device 11 according to the embodiment of the present invention, the air conditioner 33 is used by using the second negative pressure threshold value Pth2 until the negative pressure value Pvs returns to an appropriate range exceeding the first negative pressure threshold value Pth1. By performing control to stop or return the operation, the operation of the air conditioner 33 can be temporarily returned. Thereby, the atmosphere in a vehicle interior can be maintained as comfortably as possible.

  In the vehicle control device 11 according to the embodiment of the present invention, the second negative pressure threshold value Pth2 is the negative pressure at the time when the predetermined standby time (threshold switching time Tth_chg) has elapsed (see time t3 in FIG. 3). A configuration is adopted that is variably set in consideration of being smaller than the value Pvs.

  According to the vehicle control device 11 according to the embodiment of the present invention, the second negative pressure threshold value Pth2 that is variably set in consideration of being smaller than the negative pressure value Pvs at the time when the predetermined standby time has elapsed. Since the control for stopping or returning the operation of the air conditioner 33 is performed using this, the operation of the air conditioner 33 can be reliably returned.

  Further, in the vehicle control device 11 according to the embodiment of the present invention, the second negative pressure threshold value Pth2 is controlled to stop or return the operation of the air conditioner 33 using the second negative pressure threshold value Pth2. In this case, the configuration is set in consideration that the operation force related to braking can be continuously boosted until the vehicle wheels tend to be locked and the VSA device (ABS device) 35 is activated. Adopted.

  According to the vehicle control device 11 according to the embodiment of the present invention, the operation force related to braking is continued and boosted until the vehicle wheels tend to lock and the VSA device (ABS device) 35 operates. Since the control of stopping or returning the operation of the air conditioner 33 is performed using the second negative pressure threshold value Pth2 that is variably set in consideration of the possibility of being possible, sufficient boosting is ensured even with the second negative pressure threshold value Pth2. As a result, the burden on the driver during braking can be reduced.

  In the vehicle control device 11 according to the embodiment of the present invention, the control unit 47 has the negative pressure value Pvs smaller than either the first negative pressure threshold value Pth1 or the second negative pressure threshold value Pth2, and A configuration is adopted in which, when an operation amount related to vehicle braking exceeds a predetermined threshold, control is performed to activate a VSA device (braking assist device) 35 that assists vehicle braking in accordance with the operation amount related to braking. May be.

  According to the vehicle control device 11 according to the embodiment of the present invention, the negative pressure value Pvs is equal to the first negative pressure threshold value Pth1 or the second negative pressure threshold value Pth2 in addition to the effect of comfortably maintaining the atmosphere in the vehicle interior. Even when the operation amount relating to braking of the vehicle exceeds a predetermined threshold value, an appropriate braking force can be ensured.

[Other Embodiments]
The embodiment described above shows an embodiment of the present invention. Therefore, the technical scope of the present invention should not be limitedly interpreted by these. This is because the present invention can be implemented in various forms without departing from the gist or main features thereof.

  For example, in the embodiment of the present invention, when the state where the negative pressure value Pvs is smaller than the first negative pressure threshold value Pth1 continues for a predetermined waiting time Tth_chg, Although the configuration has been described in which the control for returning the operation of the air conditioner 33 from the stopped state is performed using the second negative pressure threshold Pth2 that is smaller than the negative pressure threshold Pth1, the present invention is limited to this example. Not.

  Instead of the above-described configuration, for example, the control unit 47 determines that the state in which the operation of the air conditioner 33 has stopped due to the negative pressure value Pvs becoming smaller than the first negative pressure threshold value Pth1 exceeds the predetermined standby time Tth_chg. When it continues, you may employ | adopt the structure which performs control which resets the operation | movement of the air conditioner 33 from the state which stopped operation | movement using the 2nd negative pressure threshold value Pth2 small compared with the 1st negative pressure threshold value Pth1.

  Further, in the embodiment of the present invention, the configuration in which the control of stopping or returning the operation of the air conditioner 33 is performed using the first negative pressure threshold value Pth1 has been described, but the present invention is not limited to this example. . For example, the first negative pressure threshold Pth1 is used as the negative pressure threshold when stopping the operation of the air conditioner 33, while the negative pressure threshold when returning the operation of the air conditioner 33 is compared with the first negative pressure threshold Pth1. You may employ | adopt the structure which uses the correlation value of the big 1st negative pressure threshold value Pth1.

  According to this configuration, when the control for stopping or returning the operation of the air conditioner 33 is performed using the first negative pressure threshold Pth1 (including the correlation value), the operation of the air conditioner 33 is performed between the stop and the return. It is possible to avoid the situation of falling into an unstable state that repeats in a short time.

  Similarly to the above, in the embodiment of the present invention, the second negative pressure threshold value Pth2 is used to control to stop or return the operation of the air conditioner 33. However, the present invention is not limited to this example. It is not limited to. For example, the second negative pressure threshold value Pth2 is used as the negative pressure threshold value when stopping the operation of the air conditioner 33, while the negative pressure threshold value when returning the operation of the air conditioner 33 is compared with the second negative pressure threshold value Pth2. A configuration that uses the correlation value of the large second negative pressure threshold Pth2 may be employed.

  With this configuration, when the control for stopping or returning the operation of the air conditioner 33 is performed using the second negative pressure threshold value (including the correlation value) Pth2, the operation of the air conditioner 33 is between the stop and the return. It is possible to avoid the situation of falling into an unstable state that repeats in a short time.

DESCRIPTION OF SYMBOLS 11 Control apparatus for vehicles 13 Internal combustion engine 23 Booster (negative pressure booster)
33 Air conditioner 35 VSA device (ABS device, braking assist device)
39 Compressor 45 Negative Pressure Acquisition Unit 47 Control Unit Pvs Negative Pressure Value Pth1 First Negative Pressure Threshold Pth2 Second Negative Pressure Threshold Tth_chg Predetermined Standby Time

Claims (5)

A negative pressure acquisition unit that acquires a negative pressure of a negative pressure booster that boosts an operation force related to braking using an intake negative pressure of an internal combustion engine mounted on the vehicle;
When the negative pressure value obtained by the negative pressure acquisition unit becomes smaller than the first negative pressure threshold, the operation of the air conditioner having a compressor driven by the driving force of the internal combustion engine is stopped, while the negative pressure is A control unit for performing control to restore the operation of the air conditioner when the value becomes smaller than the first negative pressure threshold after the value becomes smaller than the first negative pressure threshold;
When the state in which the negative pressure value is smaller than the first negative pressure threshold value continues beyond a predetermined standby time, the control unit determines that the second negative pressure value is smaller than the first negative pressure threshold value. The negative pressure threshold is switched and used, and based on the second negative pressure threshold, control is performed to return the air conditioner from a stopped state.
A control apparatus for a vehicle. The vehicle control device according to claim 1,
The control unit sets the second negative pressure threshold value until the negative pressure value becomes larger than the first negative pressure threshold value after the negative pressure value becomes smaller than the first negative pressure threshold value. Control to stop or restore the operation of the air conditioner using,
A vehicle control device characterized by the above. The vehicle control device according to claim 1 or 2,
The second negative pressure threshold is variably set in consideration of being smaller than the negative pressure value at the time when the waiting time has elapsed.
A vehicle control device characterized by the above. The vehicle control device according to any one of claims 1 to 3,
When the second negative pressure threshold is controlled to stop or restore the operation of the air conditioner using the second negative pressure threshold, the ABS of the vehicle is activated because the vehicle wheel tends to lock. Until it is set in consideration that the operation force related to the braking can be continuously boosted,
A control apparatus for a vehicle. The vehicle control device according to any one of claims 1 to 4,
When the negative pressure value is smaller than either the first negative pressure threshold value or the second negative pressure threshold value, and the operation amount related to braking of the vehicle exceeds a predetermined threshold value, the control unit In accordance with an operation amount related to the braking, control is performed to activate a braking assist device that assists braking of the vehicle.
A control apparatus for a vehicle.

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