KR100422621B1 - Apparatus and method for controlling suspension of vehicles - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a suspension control device for a vehicle and a control method thereof, wherein the suspension control device includes: a switching element for designating a number of suspension devices whose lift is to be controlled according to switching between a plurality of switching positions; ; A plurality of suspension control switch units for designating a degree of elevation of the suspension device designated as the control target by the switching element; A control signal for detecting whether the switching element, the plurality of suspension control switch units, the ignition key of the vehicle, and the transmission of the vehicle are respectively instructed to instruct whether to supply power for driving at least one of the suspension devices; A central control unit for outputting; A suspension driver for driving the suspension device up and down according to the power determined by the control signal of the central controller; A storage power supply unit configured to store power for supplying power to the suspension driver according to a control signal of the central controller; It includes an electronic control unit for increasing the engine speed in accordance with the control signal of the central control unit for supplying the electric power to the storage power supply unit, by selectively controlling each suspension of the vehicle to replace the tire or jackless tire It is possible to increase the starting stability when loading.

Description

Suspension control device of vehicle and its control method {APPARATUS AND METHOD FOR CONTROLLING SUSPENSION OF VEHICLES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension control apparatus for a vehicle and a control method thereof, and more particularly, to a suspension control apparatus for a vehicle and a control method thereof for appropriately adjusting the rising height of the suspension apparatus according to the driver's will.

In general, the suspension of the vehicle is responsible for preventing the impact to the functional portion of the vehicle according to the state of the road surface and the load load, and improves the ride comfort of the passenger or driver.

When the suspension is loaded on the vehicle, such a suspension device is biased to the rear with a slight increase in the center of gravity of the vehicle compared to the tolerance state according to the loading state of the cargo.

However, the prior art described above is inconvenient to use a lever or jack to replace a flat tire. In particular, in the case of a vehicle on which cargo is loaded, the step of unloading the cargo of the loading box should be performed before lifting the body and the tire using a jack. Therefore, there are inconveniences in that the cargo unloading, tire replacement, and cargo loading must be performed in order.

In addition, in the case of lifting the vehicle body and the tire by using the jack has a disadvantage that the height of the jack up (Jack Up), which is the maximum height that can be lifted by the jack is low, it may not be able to lift the tire sufficiently.

In addition, when the vehicle starts or starts uphill when the heavy cargo is loaded in the loading box, the phenomenon of being inclined toward the back of the weight of the cargo may be caused by the stop inertia. At this time, the action point between the stop inertia caused by the load of the vehicle and the power transmitted to the tire in order to advance the vehicle forward and the front inertia does not coincide with each other, which may cause a phenomenon that the front tire of the driver is lifted.

The present invention was created to solve all the problems of the related art, and an object of the present invention is to adjust the lift height of the suspension system appropriately according to the driver's will, thereby relieving the driver's anxiety at the start of the load state. The present invention provides a suspension control device for a vehicle and a suspension control method that can be applied to a suspension control device for the vehicle.

1 is a block diagram of a suspension control apparatus for a vehicle according to the present invention.

2 is a flowchart of a suspension control method for a vehicle according to the present invention;

3a is a flow chart of the step of controlling the left suspension in FIG.

3b is a flow chart of the step of controlling the right suspension in FIG.

3C is a flow chart of the steps of controlling both suspensions in FIG.

Figure 4 is an application example when replacing the tire of the present invention.

Figure 5 is an application example of adjusting the vehicle attitude of the present invention.

Explanation of symbols on the main parts of the drawings

101: ignition key 103: transmission

105: switching element 107A, 107B: suspension control switch unit

109: central control 111: secondary clutch

113: secondary alternator 115A, 115B: actuator

117A, 117B: magnetic clutch 119, 121: condenser

123A, 123B: Relay 125: Electronic control unit

127: throttle opening degree detection unit 129: clutch

131: accelerator pedal

In order to achieve the above object, the suspension control apparatus of a vehicle of the present invention is a vehicle having an electronically controlled suspension, switching for designating the number of suspensions to be controlled whether or not to be raised as the switching between a plurality of switching positions. An element; A plurality of suspension control switch units for designating a degree of elevation of the suspension device designated as the control target by the switching element; A control signal for detecting whether the switching element, the plurality of suspension control switch units, the ignition key of the vehicle, and the transmission of the vehicle are respectively instructed to instruct whether to supply power for driving at least one of the suspension devices; Outputting, and when the switching element is switched to the first switching position, the rising height adjustment of all the suspension devices is blocked, and only for any one of the plurality of suspension devices when the switching device is switched to the second switching position. The rising height is adjusted, and when the switch is switched to the third switching position, the rising height is simultaneously adjusted for all of the suspension devices, and when any one of the plurality of suspension control switch units is switched to the first switching position. The suspension height adjustment of the suspension device is blocked, and any one of the plurality of suspension control switch units The suspension is raised by one-fourth of the maximum liftable value when the switch is switched to the latching position, and the suspension is raised by two times the maximum swingable value when any one of the plurality of suspension control switch units is switched to the third switching position. A central control unit which raises the suspension by 3/4 of the liftable value when the vehicle is raised by 4 and one of the plurality of suspension control switch units is switched to the fourth switching position; A suspension driver for driving the suspension device up and down according to the power determined by the control signal of the central controller; By storing power for supplying power to the suspension driver according to the control signal of the central control unit, the first capacitor for storing power supplied from the battery of the vehicle, and the power supplied from the alternator of the vehicle And a plurality of relay units configured to switch the on / off power of the first condenser or the second condenser on / off according to a control signal of the central control unit and transmit or cut off them to the plurality of suspension drivers. Stored power supply; And an electronic control unit for supplying the electric power to the electric power storage by increasing the engine speed in accordance with the control signal of the central control unit. In order to achieve the above object, the suspension control method of the vehicle of the present invention includes: If the ignition key is switched to the start position and the transmission is in the neutral position while the suspension control device is initialized, the central control unit detecting the switching position of the switching element; When the switching element is in the second switching position, driving, by the central control unit, any one of the plurality of suspension devices according to the switching positions of the plurality of suspension control switching units; When the switching element is in the third switching position, simultaneously driving the plurality of suspensions according to at least one switching position of the plurality of suspension control switch units.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram of a suspension control apparatus for a vehicle according to the present invention, Figure 2 is a flow chart of a suspension control method for a vehicle according to the present invention, Figure 3a is a flow chart of the step of controlling the left suspension in Figure 2, FIG. 3B is a flow chart of the step of controlling the right suspension in FIG. 2, FIG. 3C is a flow chart of the control of both suspensions in FIG. 2, FIG. Is an example of application in adjusting the vehicle attitude of the present invention.

As shown in Fig. 1, the central control unit 109 of the suspension unit includes an ignition key 101, a transmission unit 103, a switching element 105, and a plurality of suspension control switch units to control the suspension unit. The states of 107A and 107B are monitored respectively.

The switching element 105 has three switching positions of the first switching position, the second switching position, and the third switching position in order to limit the number of suspensions to be controlled, and may be implemented using a three-phase pushbutton or the like. Can be. When the switching element 105 is implemented as a push button, three switching positions are illustrated. The first switching position 'OFF', the second switching position 'ONE PART', and the third switching position 'BOTH' 'to be. Thus, it is determined which of the two suspensions is to be controlled according to each switching position of the switching element.

In addition, the suspension control switch unit 107A and 107B, which are provided with two, have four switching positions, and the four switching positions are 'OFF' as the first switching position and '1/4' as the second switching position. And '2/4' as the third switching position and '3/4' as the fourth switching position. The suspension control switch is composed of a left suspension control switch 107A and a right suspension control switch 107B so as to control the suspension on the left side and the suspension on the right side, respectively.

In addition, the central control unit 109 includes a suspension clutch 115A and 115B including a secondary clutch 111, a secondary alternator unit 113, two actuators 115A and 115B, and two magnetic clutches 117A and 117B. , 117A, 117B, storage capacitors 119, 121, 123A, 123B composed of two capacitors 119, 121, two relays 123A, 123B, throttle opening degree detector 127, and the like. To control.

The operating power of the two actuators 115A and 115B in the suspension drive unit is supplied by two capacitors 119 and 121, and each of these capacitors 119 and 121 is stored in a battery by the battery 133 or the alternator. To be supplied.

A suspension control method applied to a suspension control apparatus for a vehicle according to the present invention configured as described above will be described.

In Fig. 4, the suspension control device is set to have a constant initial state. This initial state shall be automatically reset when the control phase for the suspension system is completed and returns to a normal state such as a driving state or a stopping state.

If you explain the settings in the initial state,

Secondary clutch (SC): OFF,

2nd alternator (SA): OFF,

Left actuator (ACL): OFF,

Right Actuator (ACR): OFF,

Left magnetic clutch (MCL): OFF,

Right magnetic clutch (MCR): OFF,

Left suspension control switch (SCSL): OFF,

Right suspension control switch (SCSR): OFF,

3-phase pushbuttons (3PB): OFF

Same as

When the ignition key 101 is switched to the start position in the initial state, the central control unit 109 detects the state of the transmission 103 (ST121 to ST122).

Thus, when the state of the transmission is in a position other than neutral, the driving state is switched to the driving state, and when the ignition key 101 is turned OFF, the respective function units of the suspension control apparatus are reset to the initial state values shown above ( ST123-ST124).

Unlike the operating state, when the transmission is in the neutral position while the ignition key 101 is switched to the start position (ST122), the central control unit 109 detects the switching position of the three-phase pushbutton 105. (ST125, ST126).

The three-phase push button 105 has a state of 'OFF', 'ONE PART', 'BOTH', the 'OFF' state corresponds to the case that does not control the rising height of the suspension device, 'ONE PART' Corresponds to the case of controlling only one side suspension on the left or right side, and 'BOTH' corresponds to the case of controlling the left and right side suspension at the same time.

Therefore, when the three-phase pushbutton 105 indicates 'ONE PART' (ST125), the central control unit 109 detects the switching positions of the plurality of suspension control switch units 107A and 107B and which suspension device. It is determined whether to control (ST130, ST140).

In the preferred case, when the three-phase pushbutton indicates 'ONE PART', the left suspension control switch 117A and the right suspension control switch 117B should not be turned on at the same time. At this time, the ON state of each suspension control switch unit 117A or 117B is a collective term for a switching position other than OFF, and is used in the same sense below.

Thus, the left suspension control switch 117A is turned on so that the left suspension is controlled in more detail.

3A shows a flow chart in the case of controlling only the left suspension.

In FIG. 3A, when the left suspension control switch 107A indicates a state other than OFF, that is, 1/4 ',' 2/4 'or' 3/4 ', the switching position is' 1/4'. The determination of whether or not is made by the central control unit 109 (ST131).

When it is confirmed in step ST131 that the switching position is '1/4', the central control unit 109 controls the first condenser 119, but otherwise, the secondary clutch 111 and the secondary alternator 113 ) Are turned ON and the first capacitor 119 is controlled together with the second capacitor 121 (ST132 to ST135).

The reason for selectively controlling the first and second capacitors 119 and 121 according to the switching position of the left suspension control switch 117A is that the amount of power required to raise the suspension is different. In other words, because a larger output power is required to increase the tire lift height, two capacitors 119 and 121 are used at the same time. In order to store the second capacitor 121, an operation of turning on the secondary alternator 113 must be preceded.

After the central controller 109 adjusts the capacitor output, the left relay 123A is turned ON (ST136).

The left relay 123A transmits the electric power of the capacitors 119 and 121 to the left actuator 115A in the ON state to raise the height of the suspension device (ST137).

The control steps ST130 to ST137 for the left suspension described above may be applied to the same system even when the right suspension control switch 107B is turned on to control the right suspension.

More specifically, in FIG. 3B, when it is confirmed that the right suspension control switch 107B is ON when the three-phase pushbutton 105 is in the 'ONE PART' position, the central controller 109 controls the right suspension. It will be performed (ST140 ~ ST147).

At this time, the power of the condenser 119, 121 in the control of the right suspension should be transmitted to the right actuator 115B by the right relay (123B).

After the suspension is raised, the flat tire can be replaced (ST148).

On the other hand, when the transmission 103 is in the neutral state and the switching position of the three-phase pushbutton 105 is 'BOTH' while the ignition key 101 is switched to the start position, both suspensions are simultaneously controlled ( ST126).

As shown in Fig. 5C, when the central control unit 109 detects a state in which one of the presenter control switch units 107A and 107B is turned on, the electronic control unit (ECU) 125 controls the throttle control unit (TPS). By adjusting the 127, the engine speed is increased (ST160 to ST162).

In this way, by increasing the engine speed, it is possible to supply power to the actuators 115A and 115B on both sides to increase the height of both suspensions at the same time.

The central control unit 109 increases the engine speed, and then turns on the secondary clutch 111 and the secondary alternator 113 (ST163 to ST164).

Subsequently, both the first and second capacitors 119 and 121 are controlled to output the stored power. Since the use of both capacitors 119 and 121 is to transfer the corresponding power because both suspensions must be controlled, both the left relay 123A and the right relay 123B should be turned ON ( ST165).

Then, the left actuator 115A and the right actuator 125B raise each suspension simultaneously. The height at which both suspensions simultaneously rise is limited by the switching positions of the suspension control switch units 107A and 107B sensed by the central control unit 109 (ST166).

As a result, each suspension coupled to the front tires of both sides is properly raised, and the vehicle is inclined to the front to stabilize the attitude of the vehicle having the load (ST167).

And in order to restore the suspension which controlled the height to the original state, the said suspension control switch part 107A (107B) is switched to the "OFF" state. Then, each functional unit that is turned ON to control the suspension of one side is turned off. At this time, the function unit to be turned off is the left actuator 115A, the right actuator 115B, the left magnetic clutch 117A, the right magnetic clutch 117B, and the like (ST150).

After the control of one suspension or the control of both suspensions described above is completed, the three-phase pushbutton 105 is returned to the 'OFF' state in order to return to the normal state in which driving is possible (ST127).

Subsequently, the clutch 129 and the accelerator 131 are switched to the ON state to enable driving, and the secondary clutch 111 and the secondary alternator 113 are switched to the 'OFF' state to correspond to the initial state. (ST128-ST129).

Therefore, the suspension control device returned to the initial state becomes a state capable of driving or parking when the shift position of the transmission 103 is out of neutral.

According to the present invention, when the tire needs to be replaced due to a puncture or the like as shown in FIG. Controlled lifting allows the tire to be spaced apart from the ground.

Then, there is an effect that the tire can be replaced even in the state without the help of jacks or levers without unloading the loaded cargo as shown in Figure 2 (b).

In addition, as the cargo is loaded as shown in FIG. It is effective to increase the stability of the vehicle attitude by reducing the difference between the operating point of the stop inertial force and the power for driving the vehicle.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the following claims.

Claims (11)

(Correction) A vehicle equipped with an electronically controlled suspension device, A switching element for designating the number of suspensions to be controlled to be raised or not as switching between the plurality of switching positions; A plurality of suspension control switch units for designating a degree of elevation of the suspension device designated as the control target by the switching element; A control signal for detecting whether the switching element, the plurality of suspension control switch units, the ignition key of the vehicle, and the transmission of the vehicle are respectively instructed to instruct whether to supply power for driving at least one of the suspension devices; Outputting , and when the switching element is switched to the first switching position, the rising height adjustment of all the suspension devices is blocked, and only for any one of the plurality of suspension devices when the switching device is switched to the second switching position. The rising height is adjusted, and when the switch is switched to the third switching position, the rising height is simultaneously adjusted for all of the suspension devices, and when any one of the plurality of suspension control switch units is switched to the first switching position. The suspension height adjustment of the suspension device is blocked, and any one of the plurality of suspension control switch units The suspension is raised by one-fourth of the maximum liftable value in the case of switching to the latching position, and the suspension is raised by two times of the maximum liftable value when any one of the plurality of suspension control switch units is switched to the third switching position. A central control unit which raises the suspension by 3/4 of the liftable value when the vehicle is raised by 4 and one of the plurality of suspension control switch units is switched to the fourth switching position; A suspension driver for driving the suspension device up and down according to the power determined by the control signal of the central controller; By storing power for supplying power to the suspension driver according to the control signal of the central control unit, the first capacitor for storing power supplied from the battery of the vehicle, and the power supplied from the alternator of the vehicle And a plurality of relay units configured to switch the on / off power of the first condenser or the second condenser on / off according to a control signal of the central control unit and transmit or cut off them to the plurality of suspension drivers. Stored power supply; Suspension control device for a vehicle, characterized in that it comprises an electronic control unit for supplying the electric power to the storage power supply by increasing the engine speed in accordance with the control signal of the central control unit. (delete) (delete) (delete) (a) the central control unit detecting the switching position of the switching element when the ignition key is switched to the start position and the transmission is in the neutral position while the suspension control device of the vehicle is initialized; (b) when the switching element is in the second switching position, driving, by the central control unit, any one of the plurality of suspension devices according to the switching positions of the plurality of suspension control switching units; (c) when the switching element is in a third switching position, simultaneously driving the plurality of suspension devices according to at least one switching position of the plurality of suspension control switch units; Control method. The method of claim 5, wherein in the step (a) the initialization of the suspension control device, It is performed at the time of initial driving of the suspension control device or when the lifting height control operation for at least one suspension device is completed by the suspension control device, and the secondary clutch of the vehicle, the secondary alternator of the vehicle, and the suspension drive unit And, the switching element and the plurality of suspension control switch parts all return to a specific state. The method according to claim 5, wherein in the step (a), when the switching element is in the first switching position, Suspension control method for a vehicle, characterized in that the central control unit controls such that no power storage output to any suspension device. The method of claim 5, wherein step (b) (B1) checking, by a central controller, whether the switching element is in a second switching position; When it is confirmed in the step (b1) that the switching element is in the second switching position, the central control unit checks whether at least one element of the plurality of suspension control switch units is in a switching position other than the first switching position ( b2); If it is confirmed in step (b2) that only one of the suspension control switch unit other than the first switching position, (b3) adjusting the output power of the storage power supply according to the switching position of the suspension control switch unit; Suspension control method for a vehicle, characterized in that the. (delete). The method of claim 8, wherein step (b3), (B3a) outputting power by controlling a first capacitor by a central control unit when the suspension control switch unit is in a second switching position; When the suspension control switch unit is in the third or fourth switching position, the central control unit turns on the secondary alternator and the secondary clutch of the vehicle, and the electric power is stored by the storage power of the first condenser and the secondary alternator. (B3b) controlling the power storage of the second capacitor to be output; When the storage power is output by performing the step (b3a) or the operation (b3b), the central control unit turns on the relay unit to turn the storage power to the driving target by the suspension control switch unit at a switching position other than the first switching position. (B3c) delivering to the actuator of the designated suspension; The actuator receiving the electric power transmitted by the turned on relay drives the suspension device by the applied power to raise the suspension device to an extent specified by the switching position of the suspension control switch unit at a switching position other than the first switching position. Suspension control method of a vehicle comprising the step (b3d). 6. The method of claim 5, wherein the step (c) is in the on state when the plurality of suspension control switch units are located outside the first switching position. (C1) sensing, by the central control unit, the switching positions of the plurality of suspension control switch units when the switching element is in the second switching position; (C2) increasing the engine speed by adjusting a throttle valve by a central controller when at least one of the plurality of suspension control switch units is in an on state; (C3) turning on the secondary clutch and the secondary alternator of the vehicle by the central controller when the engine speed is increased by performing the step (c2); (C4) performing a step (c3) so that the secondary clutch and the secondary alternator are turned on, respectively, and a central control unit controls the first condenser and the second condenser to output axial power; In step (c4), the electric power output from the first and second capacitors is simultaneously transferred to the actuators of the respective suspension devices, thereby raising the height of each suspension device as specified by the suspension control switch in the on state. Suspension control method of a vehicle, characterized in that it comprises the step (c5).