JP4058539B2 - vehicle - Google Patents

Description

  The present invention relates to a vehicle such as an automobile having a function of adjusting energy consumption.

Nowadays, automobiles are provided with various electrically driven devices. In particular, a vehicle to which a motor for driving an electric vehicle or a hybrid vehicle with high power consumption, an electric brake, an electromagnetic suspension, or the like is newly added has been developed.
JP-A-4-347536

However, when such devices with large energy consumption increase, the burden on the battery increases, and it is necessary to increase the capacity of the battery and the generator in order to cope with the energy supply, which increases the weight and cost of the vehicle. There was a problem to do.
The present invention relates to a vehicle that solves such a problem.

In the vehicle of the present invention, any one of a plurality of control targets of an electrically driven brake, steering, suspension, or drive system, consumption energy detection means for detecting each consumption energy, and a sensor for detecting the vehicle state of the vehicle, A control device that controls the plurality of control objects based on an output from the sensor, wherein the control device has a plurality of control situations for each of the plurality of control subjects, and has priority for each of the plurality of control situations. It has energy consumption control means for adjusting the energy supplied to the control target according to the priority when the order is determined in advance and it is determined that the detection of the energy consumption detection means has reached a set value. Features.
In the vehicle according to claim 1, the control object further includes a brake, and the control situation includes any one of a brake for stopping, a skid control, an antilock brake control, and a traction control. The priority is lowered in the order of control status.
In the vehicle according to claim 3, the control object further includes steering, and the control situation includes any one of steering, danger avoidance operation, and feedback control linked to a steering operation in the order of the control situation. It is characterized by low priority.
In the vehicle according to claim 4, the control object further includes a suspension, and the control situation includes any one of danger avoidance assist, active control, and semi-active control, and the priority order is in the order of the control situation. It is characterized by being lowered.

  As a result, the energy supply to the plurality of electrically driven devices is optimally controlled based on the output of the sensor that detects the vehicle state of the vehicle.

  In the vehicle of the present invention, when the energy supply to the plurality of electric drive devices becomes excessive, the control content that is highly necessary is based on the output from the sensor that detects the vehicle state of the vehicle. Energy can be prioritized according to

  Therefore, the increase in size of the battery and power generation can be suppressed.

  A first embodiment of the present invention will be described with reference to FIGS.

  A system of a plurality of devices in an automobile as a vehicle of the present invention will be described with reference to FIG.

  In FIG. 1, reference numeral 1 denotes various sensors provided on the vehicle body as vehicle state detecting means, a wheel speed sensor for detecting the rotational speed of each front, rear, left, and right wheels, a vehicle speed sensor for detecting the speed of the vehicle, and steering operation. Steering angle sensor that detects the angle, throttle sensor that detects the amount of depression of the accelerator pedal, brake sensor that detects the depression state of the brake pedal, vehicle height sensor that detects the distance between the vehicle body and the axle, front / rear / left / right / up / down of the vehicle body It consists of an acceleration sensor that detects acceleration.

  As other sensors of the vehicle state detection means, a GPS sensor that measures the position of the vehicle, a sensor that measures the in-house temperature, an inter-vehicle sensor that measures the inter-vehicle distance from the preceding vehicle, and the like can be considered. The state detection means may be any sensor as long as it is a sensor that measures the traveling state of the vehicle body, the operation state of the driving vehicle, the external state where the vehicle body is placed, and the like.

  Data detected by the various sensors 1 is connected to a network (CAN) line 2 formed in the vehicle, and the various detection data is input to the general control device 3 and various control devices 6 that request the data. Is done.

  The line 2 is shown as a single line in the figure for convenience, but is actually composed of a plurality of lines such as a line for supplying power to the sensor, a line for supplying a signal, and a ground. Further, those that require a lot of electric power (energy consumption) such as motors of various control objects 7 are directly connected to the battery 4 and supplied with electric power.

  Further, the battery 4 and the generator 5 are connected to the line 2, and signal data of the storage status of the battery 4 and the power generation status of the generator 5 are output to the line 2. Further, the battery 4 supplies power used by the various sensors 1, the general control device 3, the various control devices 6, and the various control objects 7.

  Next, various control devices 6 and various control objects 7 as a plurality of devices of the present invention will be described.

  The electromagnetic suspension as the control object 7 is disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-280417, and is roughly a cylinder provided between a vehicle body and a wheel provided with a coil and a permanent magnet. The suspension force can be controlled actively by changing the force generated according to the power supplied to the coil, and the cylinder can be expanded and contracted, and the resistance connected to the coil can be changed to change the resistance to expansion and contraction of the cylinder. To control the suspension semi-actively.

  Then, the electromagnetic suspension control device as the control device 6 calculates the supplied power and the necessary resistance value corresponding to the force to be generated based on information from various sensors 1 such as the front / rear, up / down / left / right acceleration sensors, It is something to control. Thereby, steering stability and riding comfort can be obtained.

  In addition, the electromagnetic suspension control device outputs data relating to the operation status (control status) of the electromagnetic suspension and power consumption to the comprehensive control means 3. Therefore, the function of detecting the operating state of the electromagnetic suspension control device corresponds to the vehicle state detection means of the present invention, and the function of outputting data related to power consumption corresponds to the energy consumption detection means of the present invention.

  Next, the electric brake as the control object 7 is, for example, as shown in Japanese Patent Application Laid-Open No. 2001-343035. A motor for pressing the brake pad against the disc is provided on the caliper of the disc brake, and the electric power supplied to the motor is The brake force is controlled accordingly. And in the electric brake control device as the control device 7, the supply power corresponding to the brake force to be generated is calculated according to the output of various sensors 1 such as the brake sensor and the wheel speed sensor, and the electric power required for the electric brake Is to control. The electric brake control device also performs control such as anti-lock brake control (ABS), traction control (TRC), and side slip control (VDC) of the vehicle body.

  In addition, the electric brake control device outputs data relating to the operating state and power consumption of the electric brake to the comprehensive control means 3. Therefore, the function of detecting the operating state of the electric brake control device corresponds to the vehicle state detection means of the present invention, and the function of outputting data related to power consumption corresponds to the energy consumption detection means of the present invention.

  Furthermore, the electric steering as the control object 7 is so-called steering-by-wire as shown in, for example, Japanese Patent Laid-Open No. 2000-280925, and a motor for steering is provided in the steering mechanism of the front wheel of the vehicle, and this motor is controlled. Thus, steering control is performed. And in the electric steering control apparatus as the control apparatus 7, it is an apparatus which controls the electric power supplied to the said electric steering according to the output of a steering angle sensor.

  In addition, the electric steering control device outputs data relating to the operating state and power consumption of the electric steering to the comprehensive control means 3. Therefore, the function of detecting the operating state of the electric steering control device corresponds to the vehicle state detection means of the present invention, and the function of outputting data related to power consumption corresponds to the energy consumption detection means of the present invention.

  In addition to this, various light and light system control devices that control the lighting, light quantity, and optical axis angle, air conditioners and air conditioner control devices that control the air volume, temperature, etc. of this air conditioner, audio such as radio, CD, and car navigation system A control object 7 and a control device 6 are provided as in a device, an audio device control device that controls the audio device, and other devices and other control devices.

  Further, these various control devices 6 output data related to the operation status (control status) and power consumption of the various control objects 7 to the comprehensive control means 3. Therefore, the function of detecting the operating status of each control object 7 of each control device 6 corresponds to the vehicle state detection means of the present invention, and the function of outputting data relating to power consumption corresponds to the energy consumption detection means of the present invention. .

  Note that the above-mentioned data relating to power consumption refers to power consumption data actually supplied, power consumption peak value within a predetermined time, average power consumption value during a predetermined time, and predicted power consumption value according to the situation. Etc.

  Next, control performed in the power consumption control device that is provided in the general control device 3 and functions as energy consumption control means will be described with reference to FIGS.

  The power consumption control device 3 includes the program shown in FIG. It is initialized in step S1, and it is determined in step S2 whether the control cycle has been reached. Thereby, the following steps are executed for each control cycle.

  In step S3, the power consumption and operation status (control status) of various sensors 1 and various control objects 7 are read.

  In step S4, the total power consumption is calculated, and in step S5, it is determined whether the power consumption has reached the set value. Here, the total power consumption may be an instantaneous value, but may be a total value, an average value, or an integral value for a predetermined time.

  This set value is set below the limit value of the battery.

  In step S6, since there is no problem with the power consumption, an operation permission command is output to all the various control devices 6. The various control devices 6 execute the control contents of the various control devices 6 as they are, and the various control objects 7 Will continue to operate.

  In step S7, since the battery limit is near, priority determination is performed based on the priority determination criterion map shown in FIG. Then, the power consumption data of each control target is added in descending order of priority, and is distinguished into a priority control target that is each control target 7 in a range not exceeding the set value and a non-priority control target that exceeds the set value.

  In step S8, an operation permission command is output to the priority control target control device 6 determined in step S7. And in the permitted control apparatus 6, the control content of the control apparatus 6 is performed as it is, and the operation of the controlled object 7 is continued.

  Further, the operation prohibition command is output to the non-priority control target, and the prohibited control target 7 stops operating.

  In addition, when the control object 7 is operated only when the operation permission command is output, the operation prohibition command does not need to be output.

  Next, the priority determination reference map of FIG. 3 will be described.

  Various control objects 7 are arranged in the horizontal direction, and various control situations (contents of control) for the various control objects 7 are arranged in the vertical direction.

  The priority is higher in the upper part of the figure and lower in the lower part. In the case of the same height in the vertical direction, the priority order is higher on the left side, and the priority order is lower on the right side (sub priority order). Therefore, when the power is insufficient, the operation stops in the order of “optical axis adjustment”, “normal operation of the audio device”, “normal operation of the air conditioner”, and “back fog lighting”.

  As the priority order of FIG. 3, the priority order of the control related to danger avoidance is increased, and the priority order of the control related to comfort is decreased.

  Next, the contents of various control situations in FIG. 3 will be described.

  For electric brakes, sudden braking to stop is given the highest priority, followed by vehicle slip control (VDC) for avoiding danger, anti-lock braking control (ABS), and slow braking for deceleration. Traction control (TRC) has the lowest priority.

  In electric steering, steering in conjunction with steering operation has the highest priority. In order to give priority to the risk avoidance operation that reduces the tire grip, increases the steering angle again, and feeds back the input from the road surface to the driver, the feedback control for controlling the steering is set to the lowest priority.

  The electric drive system has a lower priority than the aforementioned brake and steering operations, and gives priority to the order of constant speed running, rapid acceleration, and slow acceleration.

  The electromagnetic suspension gives the highest priority to danger avoidance assistance, and the active and semi-active control functions as a passive damper even during non-control, so the priority is low.

The above-mentioned danger avoidance assist is controlled to stabilize the vehicle body by controlling the brake and steering when avoiding danger such as when turning a curve at an excessive speed. However, there is a case where the traction is greatly reduced due to the slipping of the wheels or the vehicle body being greatly inclined, and no effect can be obtained no matter how much the brake or steering is controlled.
In such a case, the risk avoidance assist is a control that controls the electromagnetic suspension so that a wheel that requires traction is pressed against the road surface, or that suppresses an abnormal inclination of the vehicle body and stabilizes the traction.

  The light has a higher priority in the order of necessity in the order of headlight, small, fog, and back fog, and the function to adjust the optical axis when the optical axis of the headlamp, which is an additional function, changes due to loading in the trunk Lowered the priority.

  As for air conditioners, priority was given only to the defroster that removes the windshield, which is a safety function, and low priority was given to normal operation.

  Audio equipment has no safety issues and is not the original function of a car, so it was given the lowest priority overall.

  Note that the above priority order is an example, and the order changes depending on the type of automobile.

  In the above embodiment, the electric brake, the electric steering, the electric drive device, and the like are all electrically operated. However, the present invention is not limited to this. For example, the hydraulic pressure is controlled as a hydraulic brake instead of the electric brake. The electric steering may be an electric power steering. Furthermore, the electric drive device may be a hybrid type combining a gasoline engine and an electric motor. Further, only a part of the controlled object may be electrified and the others may be mechanical non-control type.

  In the first embodiment, the example in which the control is performed according to the priority order depending on whether or not the power exceeds the set value is not limited to this, but the power generation state of the generator 5 and the battery By monitoring the power storage state and when the power generation state or the power storage state is high, it is possible to perform finer control by performing power control in consideration of the power generation state or the battery power storage state, such as increasing the set value. it can.

  In the above embodiment, the priority order is determined by the matrix of each control means and the control status. However, the priority order is not limited to this, and the priority order may be simply set in the order of the electric brake, the drive system, and the electromagnetic suspension. .

  Moreover, although the example which provided the power consumption control apparatus in the comprehensive control apparatus was shown in the said 1st Embodiment, it is not restricted to this, For example, you may provide a power consumption control apparatus in an electromagnetic brake control apparatus, The other control devices 6 may be provided.

  Next, FIGS. 4 and 5 show a second embodiment and will be described. Since this embodiment is a modification of the priority determination process in step S7 of FIG. 2 of the first embodiment, only the relevant part will be described and the remaining description will be omitted.

  In the first embodiment, when the total power consumption exceeds the set value, the priority is given and the operation permission / non-permission is controlled for each control target device. In the embodiment, the power reduction amount is weighted for each control state of each control object 7, the power corresponding to the weight is reduced, and power is supplied.

  FIG. 4 is a weighting map for determining the priority order for supplying energy to each control target 7, and the power weight value to be reduced is determined for each control content for each control target device. The higher the weight value, the higher the rate of power reduction. A weight of 0 means that power is not reduced.

  FIG. 5 is a flowchart of the second embodiment, which is a subroutine of step S7 in the follow chart of FIG.

  In step S10, a usable power value (set value) is subtracted from the total power consumption (expected) of control in the various control targets 7 that are currently generated, and the amount of power to be reduced is obtained.

  In step S11, the weighting for each control object 7 is obtained from the weighting map of FIG.

  Next, in step S12, the amount of power to be reduced obtained in S10 is divided by the weighting ratio obtained in S11, the value is subtracted from the power consumption (expected) of each control device, and the value is obtained for each control object 7. Set and obtain the maximum power consumption value.

  Thereafter, in step S8 of FIG. 2, the maximum power consumption value for each control target device is output as an operation permission command.

  The operation of the second embodiment will be described.

  For example, when the travel lamp, the air conditioner, and the audio device are suddenly stepped on during normal operation and the danger avoidance assist of the electromagnetic suspension is activated, the weights are the light 10, the air conditioner 90, the audio device 90, the electric brake 0, the electromagnetic suspension. 10

  If the total power consumption (estimated) at this time is 1500 W and the usable power consumption (set value) is 1200 W, the power consumption must be reduced by 300 W.

  Here, when the power consumption (expected) of the light is 100 W, 300 W × 10 / (10 + 90 + 90 + 0 + 10) = 15 W is reduced, and 85 W is the maximum value of the light power consumption. Similarly, the maximum power consumption of other devices is required. In this case, since the weight of the electric brake is 0, there is no power reduction from the power consumption of the electric brake, and the maximum capacity is generated.

  Therefore, in the second embodiment, all the control objects 7 do not lose control completely, and the driver feels uncomfortable.

  In each of the above embodiments, the output of the sensor 1 is not directly used as the vehicle state detection means of the present invention, and the control status of various control objects 7 obtained by the output of the sensor 1 (indirectly in the output of the sensor 1). In the example shown in FIG. 6, the power consumption is controlled by using a map corresponding to each of the control objects 7 according to the output of the sensor 1 (vehicle state detection means). A weighting map that determines the priority for supplying energy may be used.

In FIG. 6, as an example, the brake sensor output, the steering angle sensor output time rate of change (steering operation speed), and the throttle sensor output time rate of change for the three control objects 7 of the electric brake, the electric steering, and the electric drive system. The weighting is determined according to (the throttle depression speed), and the others are controlled in the same manner as in the second embodiment.

  Although the above embodiments have been described with respect to automobiles, they may be motorcycles or railways.

  Moreover, although each said embodiment showed the example using one map, not only this but a some map may be provided and a driver | operator may be selectable. Further, the map may be changed by learning according to the driving situation of the driver. In particular, the large, medium, and small determination threshold values of the map shown in FIG. 6 are preferably changed by learning individual differences because there are individual differences among drivers.

  Moreover, although the said embodiment showed the example which used electric power (W) as energy consumption, it is not restricted to this, You may use electric current value (A) instead of electric power.

It is a figure showing the control system system of vehicles of a 1st embodiment of the present invention. It is a flowchart which shows the control content of the vehicle of 1st Embodiment of this invention. It is a map for determining the priority in step S7 of FIG. It is a map for determining the weight in 2nd Embodiment of this invention. It is a flowchart which shows the control content of the vehicle of 2nd Embodiment of this invention. It is a map for determining the weighting in other embodiment of this invention.

Explanation of symbols

1 Sensor (vehicle state detection means)
2 line 3 integrated control device (energy consumption control means)
4 Battery 5 Generator 6 Control device (energy consumption detection means, vehicle state detection means)
7 Control target (device)

Claims (4)

  Based on a plurality of control targets of electrically driven brake or steering or suspension or drive system, consumption energy detection means for detecting each consumption energy, a sensor for detecting a vehicle state of the vehicle, and an output from the sensor A control device that controls a plurality of control objects, wherein the control device has a plurality of control situations for each of the plurality of control subjects, and a priority order is predetermined for each of the plurality of control situations, and the consumption A vehicle having energy consumption control means for adjusting energy supplied to the control target according to the priority when it is determined that detection by the energy detection means has reached a set value.   The control object includes a brake, and the control situation includes any one of a brake for stopping, a skid control, an anti-lock brake control, and a traction control, and the priority is lowered in the order of the control situation. The vehicle according to claim 1.   The control object includes steering, and the control situation includes any one of steering linked to steering operation, danger avoidance operation, and feedback control, and the priority is lowered in the order of the control situation. The vehicle according to 1.   The control object includes a suspension, and the control situation includes any one of danger avoidance assist, active control, and semi-active control, and the priority is lowered in the order of the control situation. Vehicle.

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