KR102000557B1 - Overload preventor - Google Patents

Abstract

The present invention relates to an overload prevention device. The overload prevention device is installed in a vehicle and is manufactured by comprising a load measuring device unit and an overload prevention device unit to prevent overload (excess of an axial load and a total weight) of a truck. So, the overload prevention device can reduce damage to a road and can prevent danger due to driving of a vehicle. A variable axis air spring pressure sensor and a sensor capable of measuring the load of the vehicle, such as a leaf spring angle sensor attached to a leaf spring, an air suspension pressure sensor, a load cell, a garage sensor, and a strain gauge, are installed in the vehicle to measure the pressure of a variable axis air spring, the axis load, and total weight. Also, a load measurement value by the load measuring device unit is received from a controller of the overload prevention device unit, and the load applied to the vehicle is calculated. The overload prevention device controls the variable axis for the variable axis to automatically descend by the controller of the overload prevention device unit when an axis load setting value is exceeded and, also, limits the output of an engine. The overload prevention device also can limit the output of the engine when a total weight setting value is exceeded. The overload prevention device can prevent arbitrary control (ascent of the variable axis or control of the pressure in the variable axis air spring) when operating in a descending state of the variable axis. The overload prevention device also indicates the axis load and total weight by using on-board diagnostics (OBD). The overload prevention device indicates an axial load excess warning, operation of a lamp and a buzzer, and the state of the variable axis when the axial load setting value is exceeded. The overload prevention device informs a vehicle driver of the excess of the total weight setting value by operating the lamp and the buzzer and indicating a cargo unloading phrase and includes a manual control function for escape from a steep path. The overload prevention device prevents the vehicle from starting when the overload prevention device is separated, by sensing whether the overload prevention device is arbitrarily separated. Or, the overload prevention device takes a measure when idling.

Description

{Overload preventor}

The present invention is made up of a load measuring device and an overload preventing device to prevent overloading (overloading and over the total weight) of a lorry vehicle and applying it to the vehicle, thereby reducing the damage to the road and preventing the risk It is equipped with a sensor that can measure the load of the vehicle such as a leaf spring angle sensor attached to a leaf spring, an air suspension pressure sensor, a load cell, a height sensor, and a strain gauge, and a variable shaft air spring pressure sensor, The total weight and the variable shaft air spring pressure are measured, the measured value by the load measuring device is received by the controller of the overload prevention device, and the load applied to the vehicle is calculated, and when the load is overshoot, It is possible to control the axis to fall automatically or limit the engine output. When the gross weight setting value is exceeded, (Variable Axis Elevation or Variable Axis Air Spring Pressure Adjustment) when operating in variable axis lowering state and display the axle load and gross weight through OBD (on-board diagnostics) If the load is over the set value, the load will be displayed. Warning message, lamp and buzzer operation, variable axis operation and status display are displayed. When the gross weight setting value is exceeded, The present invention relates to an overtight preventing apparatus which has a manual operation function for escape and detects whether or not the overtight preventing apparatus has been arbitrarily detached, thereby making it possible to prevent start-up of the detachment or to take an idling action.

Recently, in a freight vehicle, a variable shaft or a three-shaft is generally used as a suspension device. Further, the variable shaft includes a tag axle, a pusher axle, and a lifting axle, and is provided so as to be able to move up and down, thereby dispersing the entire load of the freight car if necessary.

For example, when there is no cargo loaded on the freight vehicle equipped with the variable shaft, that is, when the cargo is loaded, the variable shaft is raised to prevent the tire of the variable shaft from touching the ground, When the cargo is loaded, that is, when the cargo is loaded, the variable shaft is lowered so that the variable shaft tire supports the ground, so that the entire load of the freight car can be distributed in a balanced manner.

An air spring is mounted to move the variable shaft upward and downward. The air spring is located between the variable shaft and the vehicle body of the freight vehicle. The compressed air enlarges or conversely reduces the volume of the variable shaft, Up and down. At this time, a plurality of air springs including a rising air spring and a lowering air spring may be provided.

In addition, it is also possible to provide a pressure switch capable of controlling the upward / downward movement of the variable shaft by the air spring or the pressure of the air spring by providing the variable shaft switch so that the driver of the freight vehicle can arbitrarily adjust the pressure of the air spring Respectively.

The driver of the freight vehicle can not accurately know the load actually applied, so that the freight can be unintentionally loaded in the overload state and the safety of the freight vehicle is threatened when traveling.

In addition, Article 22 (3) of the Road Traffic Act restricts the loading weight of freight vehicles to within 110% of the loading weight according to the structure and performance, and Article 79 (2) In order to preserve the structure and to prevent the danger caused by driving the vehicle on the road, vehicles with a weight exceeding 10 tons or a total weight exceeding 40 tons are restricted from driving the roads. Of the total number of passengers in the country, the roads will be damaged like a passenger car of 110,000 passengers.

However, the total repair cost of the road was 2,882,983 million won in 2016, and 777,171 million won was spent on packaging. However, the shippers and cargo transportation companies are required to pay overtime (exceeding the total weight) for the purpose of economic benefit (reduction of transportation cost, reduction of fuel cost, , Exceeding the weight of the load when the load weight is exceeded or loaded, or the variable shaft air suspension is fine adjusted to the appropriate pressure according to the loading amount, the shaft weight is exceeded), causing a large road accident due to increase in road breakage and decrease in braking force. This is urgent.

Therefore, in order to prevent the overload of the vehicle to reduce the damage of the road and to prevent the danger due to the running of the vehicle, the load of the vehicle such as the leaf spring angle sensor attached to the leaf spring, the air suspension pressure sensor, the load cell, the height sensor, And the load measured by the load measuring device is received by the controller of the overload preventing device to calculate the load applied to the vehicle, The engine output can be limited when the total weight is exceeded, and when the engine is operated in the variable shaft lowering state, it is possible to perform arbitrary operation (variable shaft elevation or variable shaft air spring pressure adjustment ), And a self-diagnosis module can be used to inform the driver of an overal warning, Development of an overload prevention device is urgently required.

KR 10-2013-0034567 (March 29, 2013)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an overload prevention device, And an object of the present invention is to provide an overtight preventive device capable of preventing overheating.

Another object of the present invention is to provide a vehicle load sensor capable of measuring a load of a vehicle such as a leaf spring angle sensor, an air suspension pressure sensor, a load cell, a height sensor, and a strain gauge attached to a leaf spring of a load measuring device, The total weight is measured, the measured value of the load measuring device is received from the controller of the overload prevention device to calculate the load applied to the vehicle, and the variable shaft is automatically lowered when the load is exceeded. If the variable shaft air It is possible to limit the engine output when the spring pressure is not adjusted to the proper pressure according to the load amount of the freight vehicle or if the overshoot setting value is exceeded due to an overload or the like, Prevention device.

Another object of the present invention is to display the congestion and gross weight of the vehicle measured by the load measuring device unit through on-board diagnostics (OBD) of the overload prevention device, and when the congestion exceeds the set value It provides a warning display, lamp and buzzer operation, variable axis operation and status display. It provides overload protection device to notify the driver of the vehicle through lamp indication and buzzer operation when the gross weight setting value is detected. have.

It is a further object of the present invention to provide a method and system for preventing overload if the pressure of the variable axis air spring is not adjusted to the proper pressure according to the load amount of the freight vehicle after the variable shaft automatic descent, In the controller of the unit, the resistance inside the controller is summed in parallel with the output resistance of the accelerator pedal, so that the low voltage corresponding to the output limiting step is proportionally transmitted to the vehicle ECU to limit the engine output, And to increase the resistance according to the elapsed time so that the output limit can be increased step by step.

Another object of the present invention is to prevent a variable shaft arbitrary operation (variable shaft elevation or air spring pressure adjustment) when operating in a variable shaft falling state and to prevent a temporary change of the variable shaft when the manual operation switch is input for escape, When the variable shaft manual override function is released to allow manual operation and the measured value of the variable shaft air spring pressure sensor is memorized and the set speed or set time is reached and when the drive shaft load exceeds 130% And when the front and rear axes are heard from the ground, the variable shaft manual operation function is canceled, the variable shaft is automatically lowered, and the variable shaft pressure switch is automatically returned to the stored value have.

It is another object of the present invention to provide an overtravel device capable of forcibly turning off a cruise mode switch when an output limiting function is activated by connecting a cruise mode switch to a controller of the overtravel prevention device.

It is another object of the present invention to provide an overtravel apparatus that detects whether or not an overtravel preventive apparatus has been arbitrarily detached, and makes it possible to prevent start-up from taking off or to take an idling action.

It is another object of the present invention to provide an overtravel preventing device applicable to a freight vehicle equipped with a variable shaft.

In order to achieve the above object, according to a preferred embodiment of the present invention, there is provided an overtravel preventing device comprising a sensor capable of measuring a load of a vehicle such as a leaf spring angle sensor, an air suspension pressure sensor, a load cell, A load measuring device including a pressure sensor for measuring an axial air spring pressure and a cable connecting the sensors and the controller to transmit the measured data from the sensors to the controller of the overload prevention device; Receives a measured value from a sensor of the load measuring device unit and calculates a load applied to the vehicle, receives vehicle speed data from an electronic control unit (ECU) of a vehicle or a GPS, a vehicle speed sensor, a wheel speed sensor, When the measured value of the axial load by the measuring unit exceeds the set value, the variable shaft of the vehicle can be automatically lowered or the engine output can be restricted, the engine output can be limited when the gross weight set value is exceeded, A controller of an overtraveling device which can prevent arbitrary operation (variable shaft elevation or variable shaft air spring pressure adjustment) during operation and shut off the cruise control function when the output limiting function is operated, And gross weight. If the load exceeds the set value, the load is overloaded. Warning display, lamp, buzzer, It informs the driver of the over-weight status through the display of the load-off message, the lamp and the buzzer when the gross weight setting value is exceeded, (OBD), which transmits the operation of the output limiting function to the driver through a warning phrase, a lamp and a buzzer, and a CAN signal An overtight preventing device portion including a wire harness connecting the wire harness; .

In the present invention, the self-failure diagnosis module (OBD) of the overload prevention device includes a weight re-measurement switch for re-measuring the axial load and the total weight when the driver desires, , Error information, and the like.

In the present invention, the controller operating condition of the overload protection device controls the variable shaft to be automatically lowered when the pre-start axial load exceeds a set value, and the pressure of the variable axial air spring is controlled according to the load amount of the freight vehicle If the adjustment is not made at the proper pressure or the overload setting value is exceeded due to overload, the output of the variable shaft pressure is induced and the engine output is limited. If the gross weight exceeds the set value, the engine output is limited. If the operation of the output limiting function is continued by shutting off the variable axis operation (variable axis rising, variable axis air spring pressure adjustment) and operating in the state of full load or gross weight exceeding, .

In the present invention, when the variable shaft is to be elevated for an escape of the obstacle due to the manual operation of the variable shaft in the descending operation of the variable shaft, the variable shaft arbitrary operation (variable shaft elevation or variable shaft air spring pressure adjustment) A case in which the measured value of the variable shaft air spring pressure sensor is memorized and reaches the set speed or the set time, the case where the drive shaft load exceeds 130% of the design allowable load, And automatically controlling the variable shaft pressure switch so that the variable shaft manual operation function is released, the variable shaft is automatically lowered, and the variable shaft air spring pressure is returned to the stored value.

In the present invention, when the vehicle is changed from OFF to ON, the control logic of the overload prevention device turns on the engine normally when the system is normally input. When the overload prevention device and the load measurement device are abnormal If the load sensor and the accelerator pedal position sensor (APS) are not input, the vehicle can not be started. If the vehicle is in a stopped state, the measured value of the load sensor indicates the total weight and the axial load When the measured value of the load sensor exceeds the set value of the axial load and the variable axis switch is in the rising state, the variable shaft is automatically lowered and the lamp & buzzer of the self-diagnosis module (OBD) Is set to On, the warning statement is output as overload and variable shaft fall operation, the vehicle speed is 0 km / h, and the measured value of the load sensor is the set value When the variable shaft switch is in the down state, the lamp & buzzer is on, the warning is in the warning state, and the variable shaft pressure is adjusted in the induction and the output limit is in the warning. If the vehicle is in the running state, If the value is less than the set value of the axial load and the variable axis switch is in the up position, it is output in normal operation. If the measured value of the load sensor before starting is less than the set value of the axial load and the variable axis switch is falling, the normal operation is output. If the measured value of the load sensor before starting exceeds the set value of the axial load, , Warning message is output with overshoot & variable axis pressure adjustment, engine output is limited, if the measured value of the load sensor before start is over the gross weight set value, lamp & buzzer is on, And the output of the engine is limited. In this case, the output limit of the engine is limited, and the cruise control switch is forcibly turned OFF.

In the overload protection device of the present invention, the controller of the overload prevention device compares the resistance inside the controller with the output resistance of the accelerator pedal in parallel, and a low voltage corresponding to the output restriction phase is proportionally transmitted to the vehicle ECU And an output limiting function capable of limiting the output of the engine and increasing the resistance inside the controller according to the elapsed time when the engine load and the total weight exceeded, thereby enhancing the output restriction step by step.

In the present invention, the overtravel preventing device is characterized in that the operation of the variable shaft and the variable shaft air spring pressure switch are interrupted when the vehicle is in operation, thereby preventing any arbitrary operation of the variable shaft of the driver during operation.

In the present invention, the overtravel prevention device may be applicable to a freight vehicle equipped with a variable shaft.

As described above, the overtaking prevention device of the present invention has the following effects.

First, according to the present invention, a load measuring device and an over-ride preventing device are installed and applied to a vehicle in order to prevent overload of the vehicle, thereby preventing the damage caused by over-travel of the vehicle and the over- .

Second, the present invention provides a load measuring device capable of applying a load sensor such as a leaf spring angle sensor, an air suspension pressure sensor, a load cell, a height sensor, and a strain gauge attached to a leaf spring And the load measured by the load measuring device is received from the controller of the overload prevention device to calculate the load applied to the vehicle. When the load on the vehicle is exceeded, the load is automatically adjusted through the controller of the overload prevention device And the engine output can be restricted when the pressure of the variable shaft air spring is not adjusted to a proper pressure according to the load amount of the freight vehicle or the overload setting value is excessively continued due to the overload, When the gross weight setting value is exceeded, the engine output can be restricted, and during operation, any operation (variable axis up, variable axis Spring pressure adjustment) can be prevented.

Third, the present invention displays the axial load and the gross weight measured by the load measuring device through on-board diagnostics (OBD) of the overload prevention device, and when the axial load exceeds the set value, Variable axis status display, variable ramp and buzzer operation, and variable shaft lowering, if overload setting value continues, Variable axis air spring pressure regulation display, ramp and buzzer operation can induce variable axis pressure adjustment, When the gross weight setting value is exceeded, it can display overload statement, ramp and buzzer to show the overload status to the driver so that overload can be prevented.

Fourth, the present invention includes a variable shaft manual operation function for escape from a rough road. When the manual operation switch is input, the variable shaft arbitrary operation interruption function is released so that the driver can temporarily operate the variable shaft manually. When the measured value of the spring pressure sensor is memorized, the set speed or set time is reached, the drive shaft load exceeds 130% of the design allowable load, and the whole shaft is heard from the ground, the manual operation of the variable shaft is released The variable shaft pressure switch can be automatically controlled to automatically lower the variable shaft and return the variable shaft air spring pressure to the stored value.

Fifth, the present invention is to provide an overtravel preventing device which can force a cruise mode switch to be turned off when an output limiting function is operated by connecting a cruise mode switch to a controller of an overtravel prevention device.

Sixth, the present invention is equipped with a load re-measurement function, and it is possible to perform the re-measurement of the axle load and the gross weight by operating the re-measurement switch of the self-diagnosis device at the time of changing the shaft weight and gross weight due to loading / unloading, or when the driver desires.

Seventh, the present invention detects whether or not the device preventing the overload exceeding is arbitrarily removed, and makes it possible to prevent the start-up from taking off or to take an idling action.

Eighth, the present invention is applicable to a freight vehicle equipped with a variable shaft.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram for explaining a configuration of an overtravel preventing apparatus according to an embodiment of the present invention; Fig.
2 is a flow diagram of an overtaking device in accordance with an embodiment of the present invention.
3 is a flow diagram illustrating control logic in accordance with an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of related art or configuration may unnecessarily obscure the gist of the present invention, The description will be omitted, and the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator, and the like, It should be based on the contents of.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an overtaking device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flow chart of an overtaking apparatus according to an embodiment of the present invention, and FIG. 3 is a flowchart illustrating an overturn prevention apparatus according to an embodiment of the present invention. 1 is a flow diagram illustrating control logic according to an embodiment.

The overload prevention device according to the present invention includes a load measuring device part A composed of a load sensor 10, a pressure sensor 20 and a cable 30, a controller 40, a self-diagnosis diagnostic module (OBD) 50, An overturning prevention unit B including a starting switch 60, a starting switch 70, a variable shaft switch 80, a variable shaft pressure switch 90 and a cruise mode switch 100.

As shown in Fig. 1, the overload prevention device according to the present invention includes a load sensor 10 including a plate spring angle sensor, an air suspension pressure sensor, a load cell, a height sensor, and a strain gauge, A pressure sensor 20 capable of measuring the variable axis air spring pressure and a controller 40 for controlling the data measured from the load sensor 10 and the pressure sensor 20 to the controller 40 of the over- A load measuring device (A) including a cable (3) connecting the load sensor (10) and the pressure sensor (2) for transmission; Receives the vehicle speed data from the electronic control unit (ECU) of the vehicle, the GPS, the vehicle speed sensor, the wheel speed sensor, and the like, and the load measuring unit A receives the measured vehicle speed data, , The variable shaft of the vehicle is controlled to be automatically lowered when the measured value by the axial load setting value is exceeded and the pressure of the variable shaft air spring after the variable shaft descent is not adjusted to the proper pressure according to the load amount of the freight vehicle, The cruise control switch 10 is forcibly turned off when the output limiting function is activated, and the controller (not shown) is connected to the output resistance of the accelerator pedal 60 40), the low voltage corresponding to the output limiting step is proportionally transmitted to the vehicle ECU to limit the engine output, The output limit can be strengthened step by step by increasing the resistance inside the controller 40 according to the elapsed time, and it is possible to prevent any operation of the variable shaft during operation (variable shaft elevation, variable shaft air spring pressure adjustment) When the manual operation switch of the self-diagnosis module 50 is operated for escape of the obstacle, the arbitrary operation prevention function is released so that the driver can manually operate the variable shaft, and the measured value of the variable shaft air spring pressure sensor 20 When the set speed or set time is reached, when the drive shaft load exceeds the design allowable load by more than a predetermined value, or when the whole shaft is heard from the ground, the variable shaft manual operation function is released and the variable shaft is automatically lowered The variable shaft pressure switch 90 is automatically controlled so as to return the variable shaft air spring pressure to the stored value, A controller (40) for detecting whether or not the overload protection device is arbitrarily removed and shutting off the ignition switch at the time of any detachment so as to prevent start-up from occurring or to take an idling trip; When the axis weight setting value is exceeded, variable axis state and axial load excess warning phrase, lamp and buzzer operation are transmitted to the driver, and warning message after the automatic falling of the variable axis and variable axis When the output limit function is activated, the output limit warning message, the output limit step, the lamp and buzzer operation are transmitted to the driver, and when the total weight is exceeded, the load is displayed to the driver. It is equipped with a measurement switch to allow the operator to remeasure the axial load and the total weight when desired, (OBD) 50 capable of operating a manual operation function when a manual operation is required for an escape route or the like, and an overtravel prevention unit (B) 50 including a wire harness for connecting CAN and signal between vehicles ).

The function of each technical means constituting the overtaking device of the present invention will be described as follows.

The load measuring device A includes a load sensor 10, a pressure sensor 20, and a cable 30,

The load sensor 10 includes a sensor capable of measuring a load of a vehicle such as a leaf spring angle sensor, an air suspension pressure sensor, a load cell, a height sensor, and a strain gauge.

The pressure sensor 20 measures the air spring pressure when the manual operation switch is pressed and the variable shaft air spring pressure is measured to return to the variable shaft air spring pressure memory value when the manual operation function is released .

The cable 30 is connected to the load sensor 10, the pressure sensor 20 and the load sensor 10 in order to transmit data measured from the sensors of the load measuring device A to the controller 40 of the overload device B Controller 40 is connected.

The overload protection device A includes a controller 40, a self-diagnosis diagnostic module (OBD) 50, an accelerator pedal 60, a start switch 70, a variable shaft switch 80, a variable shaft pressure switch 90 And a cruise control switch 100,

The controller 30 receives the measured data from the load measuring unit A to calculate a load applied to the vehicle and calculates the load from the vehicle's electronic control unit (ECU) or GPS, vehicle speed sensor, wheel speed sensor, The vehicle speed data is received, and the measured value by the load measuring device (A) automatically activates the variable shaft when the axial load setting value is exceeded, the output of the vehicle is restricted, the output of the vehicle is limited when the total weight is exceeded, Axis manual operation, variable axis manual operation function, load remeasurement function, random detachment detection and can not start or idling.

Here, the variable shaft automatic operating condition in the controller 30 of the overtravel preventer A controls the variable shaft to be automatically lowered when the axial load before starting the vehicle exceeds the set value, If the pressure is not adjusted to the proper pressure according to the load capacity of the freight vehicle, or if the overload setting value continues due to overload, etc., the variable shaft pressure adjustment is induced and the engine output is limited. If the gross weight exceeds the set value, (Variable shaft elevation, variable shaft air spring pressure adjustment) while the vehicle is in operation, and the output limiting function is activated when the vehicle is running under congested or gross weight exceeded.

The output limiting function of the overload protection device is such that the resistance inside the controller is summed in parallel with the resistance of the output of the accelerator pedal in the controller of the overload protection device, and a low voltage corresponding to the output limiting step is proportionally transmitted to the vehicle ECU, In case that the load and the total weight exceeded, the resistance inside the controller can be increased according to the elapsed time, so that the output restriction can be strengthened step by step.

The self-diagnosis diagnostic module (OBD) 40 displays a warning message, a buzzer, a lamp, an axial load and a total weight in accordance with the load measured by the sensors of the load measuring device (A) If the driver wants to re-measure the axle load and the total weight, the manual operation function can be operated when the variable shaft needs to be elevated for the escape of the obstacle due to the manual operation switch. Also, , Variable axis state, vehicle speed, error information, and the like.

The wire harness connects CAN and signal between the controller 30 and the self-diagnosis diagnostic module (OBD) 40 and the vehicle.

The control logic of the overtight prevention device according to the present invention will be described first. In the first case, when the vehicle is changed from OFF to ON, the start-up is normally started when the system is normally input. The load sensor 10 and the pressure sensor 20 and the accelerator pedal position sensor APS of the accelerator pedal 60 are not signaled when the load sensor A and the overtravel preventer B are abnormally input. It is outputted as not possible to start. These cases are to prevent tampering.

Secondly, when the measured value of the load sensor 10 is equal to or less than the set value of the gross weight and the axial load when the vehicle is in a stopped state, When the variable shaft switch 60 is in the up state, the ramp & buzzer is on, the overload state and the variable shaft state are outputted in the warning statement, and the variable shaft is automatically down operated. When the vehicle speed is 0 km / h, If the measured value exceeds the axial load setting value, the ramp & buzzer is on when the variable shaft switch is in the down position, the overload and variable shaft pressure adjustment is induced in the warning message, and the output limit is outputted as warning.

Thirdly, when the vehicle is in a running state, when the measured value of the load sensor 10 before starting is below the axial load set value, the vehicle speed is> 0 km / h, and the variable shaft switch 60 is ascending, & Buzzer is output as Off. When the measured value of the load sensor 10 before starting is equal to or less than the axial load set value, the vehicle speed is> 0 km / h, and the variable shaft switch 60 is in the downward state, the lamp & buzzer is turned off and the variable shaft switch 60 (Variable axis elevation) of the driver.

Fourth, in the case where the vehicle is in a running state, when the measured value of the load sensor 10 before starting exceeds the set value of axial load and the vehicle speed is> 0 km / h, the lamp & buzzer is On, & Output limit, the output limit is applied when the variable axis air spring pressure is not adjusted to the proper pressure according to the load capacity of the freight vehicle after the automatic fall of the variable shaft, or if the overload setting value continues due to overload , The cruise control switch is forcibly turned off at the time of operation of the output limiting function, and the step output limit is strengthened by the elapsed time period.

Also, when the measured value of the load sensor 10 exceeds the gross weight setting value, the lamp & buzzer is turned on, and the warning statement is outputted when the gross weight exceeds the total weight and the load gets off, and the output limitation is activated.

As described above, the overtravel preventing device can be applied to freight vehicles equipped with a variable shaft, and thus the object of application is wide.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

A: Load measuring device part 10: Load sensor
20: Pressure sensor 30: Cable
B: overload prevention device 40:
50: self diagnosis module (OBD) 60: accelerator pedal
70: Start switch 80: Variable axis switch
90: variable shaft pressure switch 100: cruise mode switch

Claims (6)

In an overtight prevention device,
A load sensor capable of measuring a load of a vehicle such as a leaf spring angle sensor, an air suspension pressure sensor, a load cell, a height sensor, a strain gauge, a pressure sensor capable of measuring the variable shaft air spring pressure, A load measuring unit including a cable for connecting the sensors and the controller of the overload protection unit to transmit data to the controller of the overload protection unit;
Receives the measured data from the load measuring device unit, calculates the load applied to the vehicle, receives the vehicle speed data from an electronic control unit (ECU) or GPS, a vehicle speed sensor, a wheel speed sensor, When the measured value by the device unit (A) is controlled so that the variable shaft of the vehicle is automatically lowered when the axial load setting value is exceeded, the pressure of the variable shaft air spring after the variable shaft descent is not adjusted to the proper pressure according to the load amount of the freight vehicle, , Limit the engine output when the overload setting value continues to be exceeded, limit the engine output when the gross weight setting value is exceeded, forcibly turn OFF the cruise control switch when the output limit function is activated, And the low voltage corresponding to the output limiting step is proportionally transmitted to the vehicle ECU to limit the engine output In case of overheating, overshooting and over-weighting, the output limit can be increased step by step by increasing the resistance inside the controller according to the elapsed time. When the manual operation switch of the self-diagnosis module is operated for the escape of the obstacle, etc., the arbitrary operation prevention function is released so that the driver can operate the variable shaft manually. The measured value of the variable shaft air spring pressure sensor is memorized, When the speed or set time is reached, when the drive shaft load exceeds the design allowable load by more than a certain value, or when the whole shaft is heard from the ground, the manual operation of the variable shaft is released and the variable shaft is automatically lowered, The variable shaft pressure switch 9 is automatically controlled so as to return the pressure to the stored value, A controller of an overrunning device which can detect whether or not the overrunning device has been arbitrarily disconnected to shut off the ignition switch to shut off the ignition switch during start-up or idling, When the set value of axial load exceeds the set value, variable shaft status and overloading warning message, lamp and buzzer operation are transmitted to the driver. After the automatic falling of the variable shaft, warning message and variable shaft pressure adjustment When the total weight setting value is exceeded, it indicates to the driver by the display of the load getting off, the lamp and buzzer operation. When the output limit function is activated, the output limit warning word, the output limit step, the lamp and buzzer operation are transmitted to the driver, The operator can re-measure the weight and total weight when he / she wants, (OBD) capable of operating a manual operation function when a manual operation is required for an escape route or the like, and a wire harness for connecting CAN and signals between vehicles; And an overturning prevention device. The method according to claim 1,
Wherein the self-failure diagnosis module (OBD) of the overload prevention device stores data such as an axle load, a variable shaft state, a vehicle speed, and error information. The method according to claim 1,
The automatic operation condition in the controller of the overtravel prevention device part automatically controls the variable shaft to descend when the pre-start axial load exceeds the set value, and the pressure of the variable axial air spring is set to a proper pressure according to the load amount of the freight vehicle In the event that the adjustment value is exceeded due to no adjustment or overload, the output of the variable shaft is induced and the output of the engine is limited. When the gross weight exceeds the set value, the engine output is limited. During the operation of the vehicle, The output limitation function is activated when operation is carried out under congested load or when the total weight is exceeded, and the output is limited step by step according to the elapsed time period. The overturning prevention device being characterized by comprising: The method according to claim 1,
The control logic of the overload protection device is such that when the vehicle is changed from the start to the OFF state, the start-up is normally started when the system is normally input. If the load measurement device and overload prevention device are abnormally input, When the load sensor, the pressure sensor and the accelerator pedal position sensor APS of the accelerator pedal are inputted with no signal, they are outputted as not possible to start. These cases are to prevent tampering (arbitrary detachment) When the measured value of the load sensor is lower than the gross weight and the axial load set value, the normal output is outputted. If the measured value of the load sensor exceeds the axial load set value and the variable axis switch is in the rising state, The buzzer is on, the warning is that the load is overloaded and the variable shaft state is output and the variable shaft is automatically lowered, the vehicle speed is 0 km / h, When the measured value of the sensor exceeds the set value of the axial load and the variable axis switch is in the down state, the lamp & buzzer is on, the warning message is the overload and the variable axis pressure is adjusted, State, the lamp & buzzer is turned off when the measured value of the load sensor before starting is less than the set value of the axial load, the vehicle speed is > 0 km / h, and the variable shaft switch is in the up state. When the measured value of the load sensor before starting is less than the set value of the axial load, the vehicle speed is> 0 km / h, and the variable shaft switch 6 is in the down state, the lamp & buzzer is outputted as Off, When the measured value of the load sensor 10 before starting exceeds the set value of the axial load and the vehicle speed is greater than 0 km / h, the lamp & buzzer is turned on. , Warning message is output as overload & output limit, and if the variable axis air spring pressure is not adjusted to the proper pressure according to the load amount of the freight vehicle after automatic descent of the variable shaft, or if the overload setting value continues due to overload, When the output limit function is activated, the cruise control switch is forcibly turned off, and the step output limit is strengthened by the elapsed time. When the load sensor value exceeds the gross weight setting value , The lamp & buzzer is on, the warning is output in excess of the total weight and the load is off, and the output limit is activated. The method according to claim 1,
The overload protection device adds the internal resistance of the controller to the output resistance of the accelerator pedal in the controller of the overload protection device in parallel, so that the low voltage corresponding to the output restriction phase is proportionally transmitted to the vehicle ECU, Wherein the output limitation function is capable of increasing the resistance according to the elapsed time and increasing the output limit step by step when the weight and the weight exceed the total weight. The method according to claim 1,
Characterized in that the overtight preventive device includes one applicable to a freight vehicle equipped with a variable shaft.

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