KR20110018132A - Electrical control device for the vehicle using the inertial sensor - Google Patents

Abstract

PURPOSE: An electric controller for a vehicle using an inertial sensor is provided to reduce the load of an engine when a vehicle is started or driven on a slope by temporarily stopping a compressor of an air conditioner. CONSTITUTION: An electric controller for a vehicle using an inertial sensor comprises a sensor unit(110), a control unit(120), a driving unit(130), an operation unit(140), and a main adjusting unit(150). The sensor unit detects the acceleration of a progressed direction and a slope of a vehicle. The control unit calculates a total acceleration value and controls a compressor of an air conditioner. The driving unit reduces the load of an engine by selectively driving and stopping the compressor based on the total acceleration value. The operation unit supplies power to the control unit and the driving unit. The main adjusting unit adjusts the value of the control unit by stages.

Description

Electrical control device for the vehicle using the inertial sensor

The present invention relates to an air conditioner and an electric control device of a vehicle, and more particularly, based on a signal detected from a sensor, a high load driving device such as an air conditioner compressor of a vehicle is controlled by a method of turning on / off the vehicle during acceleration and ramp driving. The present invention relates to an electric control device for a vehicle using an inertial sensor that enables to reduce the load on the engine to a minimum, thereby reducing fuel consumption and maximizing the acceleration performance of the engine.

In general, an air conditioner that performs a cooling function is installed in a car to supply cool wind to a hot summer vehicle, so that the occupant can maintain a stable condition.

The air conditioner performs cooling by using the property of absorbing the surrounding heat when the liquid evaporates. The air conditioner sends the refrigerant from the condenser to the expansion valve by the compressor, and the refrigerant sent to the expansion valve flows into the evaporator. The refrigerant sent to the evaporator absorbs heat around the pipe of the evaporator and actively evaporates.

Thereafter, the air deprived of heat from the evaporator is forced to flow into the interior of the vehicle through the duct by the blower, the cool air is supplied to the interior of the vehicle.

At this time, the air conditioner control device used in the conventional vehicle is configured to control the air conditioner compressor only by the set temperature difference, without having a high or low engine load of the car, to drive the compressor and the blower, etc. to operate the air conditioner. Since the engine power of the vehicle tends to drop significantly while the air conditioner is operating, the average of 15% of medium and large cars and 20 to 25% of light and small cars add on average depending on the use of air conditioners when driving the car in summer. Was consumed as.

That is, the air conditioner compressor is continuously driven to reach the set temperature value by the power of the engine, so that the load of the air conditioner compressor directly affects the engine, and in order to overcome the engine load (compressor power source) and obtain acceleration propulsion when the vehicle is accelerated. Since a lot of fuel is injected into the engine, the output of the engine is greatly reduced and the fuel consumption is relatively high.

In order to solve this problem, as shown in FIG. 1, in-vehicle temperature, outside air temperature, coolant temperature, refrigerant temperature, amount of sunlight, and the like, through various sensors and input keys of the detector 10 in a state where the driver selects the operation of the air conditioner, as shown in FIG. 1. And various data such as the humidity and the set temperature in the vehicle are input to the controller 20 for controlling the air conditioner and controlling the air conditioner driving unit 30 according to a value calculated by a predetermined calculation formula inside the controller 20. ) And the compressor 32 and the like are used.

In addition, the compressor 32 may be turned on / off according to the refrigerant temperature in order to prevent freezing. That is, the upper limit value and the lower limit value of the refrigerant temperature are set in advance, and when the temperature of the refrigerant reaches the upper limit value (approximately 3 to 6 ° C.), the compressor 32 is turned on. (32) is turned off to prevent freezing.

However, according to the prior art as described above, since the high and low load of the engine during cooling operation is not taken into consideration, when the vehicle is going uphill or when a large torque is required, such as when starting, that is, the engine load is When the compressor for the automotive air conditioner is operating in a high state, the original problem of relatively low engine power cannot be solved, and thus there is a problem such that fuel economy is increased and the engine is overloaded.

In addition, according to the prior art, it is made using a variety of sensors, but the structure is complicated, the parts cost and manufacturing cost is high, the situation is not used in small and medium sized cars.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to simplify the structure by using a simple two-axis acceleration sensor and a simple component electromagnet (relay, switch), a number of existing It is an object of the present invention to provide an electric control device for a vehicle using an inertial sensor that can reduce the unit cost and manufacturing cost by using a single sensor that used various sensors.

The objects and advantages of the present invention will be described in more detail below, and will be further embodied by the examples. Further objects and advantages of the invention may be realized by the means indicated in the claims and combinations thereof.

In order to achieve the above object, the present invention provides a vehicle electric control device using an inertial sensor that can drive a compressor and a blower fan to perform cooling operation in a vehicle. It includes the front-rear (X-axis) sensor or the up-down (Z-axis) sensor that can detect the acceleration of the vehicle in the forward-backward or up-down movement such as speed and tilt of the vehicle. Sensor unit for detecting acceleration and inclination acceleration in the direction, the total acceleration value transmitted through the sensor unit is calculated so that the air conditioner compressor can be stopped when the load of the engine is the most demanded and the output of the engine is most needed A control unit for reducing the load on the engine by selectively driving or stopping the air conditioner compressor based on the signal transmitted from the control unit The driving unit serves to supply power to the control unit and the drive unit, an operation unit provided with a reset button for initializing a switch and a setting value for selectively applying a voltage by a battery and a driver therein, the control unit It provides an electric control device for a vehicle using an inertial sensor including a main adjustment unit to adjust the set value of the step by step arbitrarily.

Further, in the present invention, the sensor detection formula at the time of driving up the ramp is characterized in that (X-axis detection value-center value) + (Z axis detection value-center value).

Further, in the present invention, the sensor detection formula at the time of driving down the ramp is characterized in that (X-axis detection value-center value) + (-Z axis detection value-center value).

Further, in the present invention, the driver is provided with a level meter (LED) and connected to the output value so that the driver can recognize the real-time acceleration situation.

In addition, in the present invention, when the X-axis and Z-axis value is lower than the predetermined value set in the control unit for a predetermined time or more to drive the air conditioner compressor by the drive current transmitted from the control unit so that the air conditioner can be operated It is characterized by one.

Therefore, the air conditioner and the electric control device for a vehicle using the inertial sensor according to the present invention is the air conditioner at the point of time when the load of the engine is most applied (acceleration section) such as when the vehicle starts or when driving on a slope, and when the output of the engine is most needed. The compressor is temporarily stopped to reduce the load on the engine. Accordingly, it is possible to maximize the performance of the engine, thereby increasing the output of the engine, reducing fuel consumption, and preventing the overload of the engine.

Hereinafter, the configuration and effect of the vehicle air conditioner and the electric control apparatus using the inertial sensor according to the present invention will be described in more detail with reference to the preferred embodiments and the accompanying drawings.

2 is a circuit diagram illustrating an air conditioner and an electric control apparatus for a vehicle using an inertial sensor according to the present invention, and FIGS. 3 and 4 are views schematically illustrating an analysis of total acceleration on a sloped road.

The in-vehicle air conditioner and electric control apparatus using the inertial sensor according to the present invention automatically stops the air conditioner compressor during acceleration and climbing acceleration of the vehicle, thereby reducing the load on the engine and reducing the amount of additional fuel consumed when using the vehicle air conditioner in the summer. It is characterized in that, as shown in Figure 2, consisting largely of the sensor unit 110, the control unit 120, the drive unit 130, the operation unit 140, the main adjustment unit 150.

The sensor unit 100 uses the two-axis acceleration sensor that detects the output signal when the driver moves the air conditioner forward and backward or up and down, such as the current moving speed of the vehicle and the inclination of the vehicle. On the other hand, it serves to detect the slope acceleration of the vehicle.

In this case, as shown in FIGS. 3 and 4, the sensor unit 110 detects the acceleration in the direction of movement of the vehicle during the front-back (X-axis) or up-down (Y) movement by the X-axis sensor. The inclination acceleration of the Z-axis sensor detects the rising and falling acceleration values and transmits them to the controller to be described later.

The control unit 120 calculates the data (total acceleration value) transmitted through the sensor unit 110 to stop the air conditioner compressor at the point of time when the load of the engine is most applied (acceleration section) and at the point where the output of the engine is most needed. It plays a role in controlling so that it can be done. That is, the driving speed of the vehicle and the degree of inclination of the vehicle are input to control the driving unit 130 to be described below by comparing with a preset set value.

Here, as shown in FIG. 3, when the output value (X-axis) of the sensor unit 110 is input to the control unit 120 when the vehicle accelerates in starting or when driving on a slope, the output value of the total acceleration correcting the slope value ( Calculate X axis + Z axis). At this time, when the value exceeds a predetermined control value (X axis + Z axis), that is, when the inertia force acting on the vehicle is applied to a predetermined magnitude or more (more than a predetermined control value), the control unit 120 ) Stops the air conditioner compressor in operation by directing the air conditioner drive current to the drive unit 130 described later. Accordingly, the vehicle is traveling on the slope with the air conditioner turned off. At this time, even if the operation of the air conditioner compressor is stopped for about 15 to 30 seconds, there is no significant difference in the function of the air conditioner. This is because the air conditioner fan operates normally even if the air conditioner compressor is stopped, and the cool wind continues to come out through the coolant refrigerant.

Here, the inertia of the running vehicle is proportional to the acceleration, which is proportional to the sum of the X axis + (positive) axis acceleration force. In addition, the stop inertia is inversely proportional to the initial acceleration, and the force is proportional to the sum of the Z-axis + (positive) axis acceleration. (The acceleration value converges to 0 when the constant speed is reached after the initial acceleration is detected.)

The sum of the acceleration values of the X-axis and the Z-axis compensates for the gravity force acting on the vehicle, and when the vehicle accelerates on a slope and a driving force required when the vehicle accelerates on a flat surface. Since the driving force required by the vehicle is different, the amount of gravity acting on the vehicle is detected by the Z-axis acceleration sensor and summed to the detection value of the X-axis acceleration sensor, thereby correcting it as close as possible to the acceleration value detected on the plain.

The driving unit 130 serves to reduce the load of the engine by selectively driving or stopping the air conditioner compressor based on the signal transmitted from the control unit 120. As described above, a large acceleration force may be required or the slope may be inclined. In this case, when the air conditioner compressor is intermittent through the relay or the vehicle is accelerated and the moving speed reaches a constant speed and maintains the driving state, the air conditioner is normally operated by connecting the power of the air conditioner compressor.

That is, when the moving speed of the vehicle continues for a predetermined time or less than a predetermined predetermined value, the controller 120 determines that the driver of the vehicle is not willing to accelerate and connects power to the air conditioner compressor, thereby operating the air conditioner normally. To be possible.

On the other hand, when the vehicle goes down a sloped road, the acceleration detection value of the -Z axis sensor unit 110 is added to the negative (-) and the sum of the acceleration detection value of the X axis acceleration sensor is "total acceleration = X axis acceleration-Z. The axial acceleration "and the load on the engine are not so great that the air conditioner compressor is not stopped.

In other words, the force of inertia that the vehicle tries to stop is inversely proportional to the acceleration acceleration, and the formula for calculating the load on the engine of the vehicle according to the movement of the vehicle is as follows. (Acceleration means instantaneous acceleration that can be detected by sensor)

 Force that the weight of the vehicle (stop inertia) acts as a load on the engine

    = X-axis acceleration + Z-axis acceleration (when ramped up)

    = X-axis acceleration + (-Z) axis acceleration (when inclined)

The above formula is converted based on the voltage output of the sensor.

  (X axis-center value) + (Z axis-center value) = On ramp

  (X axis-center value) + (-Z axis-center value) = When descending the ramp

(There is no-(minus) output value of acceleration sensor, so the range of low value and high value is set based on the center value.) For example, the output voltage range of acceleration detection value is -X = 1.7 Volt-> center value is 2.6Volt- > X = 3.6 Volt, -Z = 1.7 Volt-> center value is 2.6Volt-> Z = 3.6 Volt) And if the setting value to activate the relay is 0.5V or more (Threshold value-Ts) When setting up,

Example 1) When 3.0V is detected on the X axis of the acceleration sensor and 3.2V is detected on the Z axis when driving up the slope, => (3.0-2.6) + (3.2- 2.6) = 0.4 + 0.6 = 1.0 V.

            => (X axis detection value-center value) + (Z axis detection value-center value) = 1.0V

Therefore, 1.0V> Ts (0.5V) <= drive relay is driven to stop the air conditioner compressor.

Example 2) When driving down the slope, 3.0V is detected on the X axis of the acceleration sensor and 2.0V is detected on the Z axis => (3.0-2.6) + (2.0-2.6) = 0.4-0.6 = -0.2 V.

          => (X axis detection value-center value) + (-Z axis detection value-center value) = -0.2V

Therefore-0.2V <Ts (0.5V) <= drive relay is not driven.

Therefore, since the set value for operating the relay is 0.5V or more, the vehicle drives the relay when driving up the slope and does not drive the relay when driving down.

In addition, the driver 130 may be connected to the output value after installing the level meter (LED) to enable the driver to recognize the real-time acceleration situation. This is to induce driving at constant speed (high fuel efficiency) by recognizing the rapid acceleration situation through the level meter.

The operation unit 140 serves to supply power to the control unit 120 and the drive unit 130, and therein, a switch and a set value for selectively applying a voltage by a battery and a driver may be initialized therein. A reset button is provided.

The main adjusting unit 150 is a step-by-step adjustment of the set value of the sensor unit 110 and the control unit 120 can be arbitrarily adjusted, by adjusting the detected acceleration detection value to a variable resistor applied to the control unit, according to the driving habits The stop section of the air conditioner compressor can be selectively adjusted according to the driver's habit.

Looking at the operation method and the effect of the vehicle electrical control device using the inertial sensor according to the present invention having such a configuration as follows.

5 is a flowchart schematically illustrating a method of turning off the air conditioner of the vehicle electrical control apparatus using the inertial sensor according to the present invention.

First, the current driving state of the vehicle is checked through the sensor unit 110 installed in the vehicle. That is, after checking the moving speed and the slope of the vehicle through the sensor unit 110 to detect the X-axis and Z-axis values (S10).

Thereafter, the sum of the X-axis and Z-axis values detected by the sensor unit 110 transmits the output value of the total acceleration to the control unit 120. Accordingly, the controller 120 compares the output value with a preset designated value (S20).

Subsequently, when the output value compared by the controller 120 is higher than a predetermined value, the driving current is transmitted to the driving unit 130 so that the driving unit 130 is driven to stop the air conditioning compressor by the air conditioning connection relay ( S30). At this time, when the output value is lower than the predetermined predetermined value, the air conditioner compressor is not stopped and the air conditioner is continuously operated.

Thereafter, the moving speed and the tilt state of the vehicle are re-measured through the sensor unit 110, and the detected X and Z axis values are transmitted to the controller 120, and then the detected value and the designated value are compared (S40). At this time, when the X-axis and the Z-axis value is lower than the predetermined value set in the controller 120 for 3 seconds or more, the driving current is transmitted to the driver 130, and when it is 3 seconds or less, it is not transmitted to the driver 130. (In the present invention, the duration is specified as 3 seconds, which may be 5 seconds or 10 seconds in some cases, and the designated time is changeable.)

On the other hand, if the X-axis and Z-axis value is lower than the specified value for a predetermined time to drive the drive unit 130 by the drive current transmitted through the control unit, the air conditioning compressor is driven by the air conditioning connection relay. S50)

Therefore, if the vehicle electric control device using this inertial sensor is used for commercial LPG vehicles with low engine power and high short-range driving distance, it can reduce the additional consumption of fuel due to the use of air conditioner, and the engine during frequent acceleration / deceleration and ramp operation It is possible to reduce the driving stress caused by the power drop.

In addition, during rapid acceleration of a vehicle or driving on a slope, the sensor is continuously operated in the same manner as described above to repeatedly turn on / off the air conditioner compressor, thereby saving fuel economy and effectively exhibiting engine performance.

So far, the present invention has been described in detail with reference to embodiments of the present invention, but the scope of the present invention is not limited thereto, and it will be included to substantially equivalent ranges with the embodiments of the present invention.

In addition, in the present invention, the air conditioner as an example to help the understanding of the present invention has been mainly described, but is not limited to this is installed in the portion where the high load drive device is used can be selectively turned on / off the drive device.

And, as shown in the above description, the technology of the vehicle electric control apparatus using the inertial sensor according to the present invention is very simple, but the technical advantages of the present invention will be very clear in that the technical effect is very large.

1 is a control block diagram showing an air conditioner control apparatus of a conventional vehicle;

2 is a circuit diagram showing an electric control apparatus for a vehicle using an inertial sensor according to the present invention;

3 and 4 schematically show the analysis of the total acceleration on a sloped road;

5 is a flowchart schematically illustrating a method of turning off the air conditioner of the vehicle electrical control apparatus using the inertial sensor according to the present invention.

<Code Description of Main Parts of Drawing>

110: sensor unit 120: control unit

130: driving unit 140: operating unit

150: main control unit

Claims (5)

In the vehicle electrical control apparatus using an inertial sensor to drive the compressor and the blowing fan to perform the cooling operation in the vehicle, Before and after (X-axis) sensor or up-down (Z-axis) sensor that can detect the acceleration of the vehicle when the driver moves forward, up, or down, such as the current moving speed of the vehicle and the tilt of the vehicle while the air conditioner is turned on. An axis) sensor, the sensor unit detecting acceleration and inclination acceleration in a vehicle traveling direction; A control unit for controlling the air conditioner compressor to be stopped at a point in time when the load of the engine is most applied and a point in which the output of the engine is most needed by calculating a total acceleration value transmitted through the sensor unit; A driving unit for selectively reducing the load of the engine by driving or stopping the air conditioner compressor based on the signal transmitted from the control unit; An actuating unit for supplying power to the control unit and the driving unit, the operation unit having a reset button for initializing a switch and a set value for selectively applying a voltage by a battery and a driver therein; An electric control device for a vehicle using an inertial sensor including a main adjustment unit for arbitrarily adjusting the set value of the control unit. The method of claim 1, wherein the sensor unit The sensor detection formula for driving uphill is (X-axis detection value-center value) + (Z-axis detection value-center value). The method of claim 1, wherein the sensor unit The sensor detection formula when driving down a ramp is (X-axis detection value-center value) + (-Z axis detection value-center value). The method according to claim 1, The drive unit is installed in the level meter (LED) and connected to the output value, the vehicle electric control device using an inertial sensor, characterized in that the driver can recognize the real-time acceleration situation. The air conditioner of claim 1, wherein the driving unit drives the air conditioner compressor by a drive current transmitted from the control unit when the X-axis and Z-axis values are lower than a predetermined value preset in the control unit. Electric control device for a vehicle using an inertial sensor, characterized in that.

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