CN118188799A - Traction seat control system and method - Google Patents

Abstract

The invention belongs to the technical field of vehicles, and discloses a traction seat control system and a traction seat control method. The method comprises the following steps: when the current vehicle speed is detected to be the preset vehicle speed and the current working state is detected to be the preset working state, the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat are obtained; determining the working mode of the first electromagnetic valve according to the current voltage and the unlocking state, and sending the working mode to the second controller, wherein the second controller feeds back the working mode of the first electromagnetic valve and the working mode of the second electromagnetic valve according to the working mode; determining the working mode of the second electromagnetic valve according to the working mode and the working mode; the working mode is sent to a second controller, and the second controller feeds back the working mode of the second electromagnetic valve according to the working mode; and controlling the target traction seat according to the working mode. Through the mode, the absolute safety of unlocking the traction seat is ensured based on the electric control unlocking mode adopting the double-controller interlocking safety protection.

Description

Traction seat control system and method

Technical Field

The invention relates to the technical field of vehicles, in particular to a traction seat control system and method.

Background

At present, a pneumatic unlocking traction seat basically adopts a cylinder piston as a power source of a mechanical structure, the cylinder piston is pushed by high-pressure gas of a main vehicle, the high-pressure gas is generally introduced and controlled by an electromagnetic valve, and the control of the electromagnetic valve is realized by a cab switch. According to the electric control scheme, although the control switch with the misoperation prevention function can be used, if a switch viscous short circuit or an electromagnetic valve pin short circuit to the ground occurs in driving, the control coil of the electromagnetic valve is electrified to open the air circuit, then high-pressure gas is introduced into the unlocking cylinder, finally the traction seat can execute unlocking action, and a trailer is separated from a main vehicle, so that a major traffic accident occurs.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention mainly aims to provide a traction seat control system and a traction seat control method, which aim to solve the technical problem of how to avoid unexpected unlocking of a traction seat.

To achieve the above object, the present invention provides a fifth wheel control system including: the device comprises a control switch, a first controller, a second controller, an instrument, a first electromagnetic valve and a second electromagnetic valve, wherein the first electromagnetic valve is connected with a gas path of the second electromagnetic valve in series, a first interface of the first electromagnetic valve is conducted by the first controller, a second interface of the first electromagnetic valve is conducted by the second controller, a first interface of the second electromagnetic valve is conducted by the second controller, and a second interface of the second electromagnetic valve is conducted by the first controller.

Optionally, the control switch is a two-gear rocker switch, and the control switch comprises a locking device.

Optionally, the meter is configured to calculate a vehicle speed signal and send the vehicle speed signal to the first controller and the second controller.

To achieve the above object, the present invention provides a fifth wheel control method applied to a first controller in a fifth wheel control system as described above, the method comprising:

When the current vehicle speed is detected to be the preset vehicle speed and the current working state is detected to be the preset working state, the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat are obtained;

Determining a first working mode of a first electromagnetic valve according to the current voltage and the unlocking state, and sending the first working mode to a second controller so that the second controller feeds back a second working mode of the first electromagnetic valve and a third working mode of the second electromagnetic valve according to the first working mode;

determining a fourth working mode of the second electromagnetic valve according to the second working mode and the third working mode;

Sending the fourth working mode to the second controller so that the second controller feeds back a fifth working mode of the second electromagnetic valve according to the fourth working mode;

And controlling the target traction seat according to the fifth working mode.

Optionally, when the current vehicle speed is detected to be the preset vehicle speed and the current working state is detected to be the preset working state, acquiring the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat includes:

Detecting a first interface state of a first interface in the first electromagnetic valve and a second interface state of a second interface in the second electromagnetic valve when the current vehicle speed is detected to be a preset vehicle speed and the current working state is detected to be a preset working state;

when the first interface state and the second interface state are both preset states, acquiring a first line voltage of a line corresponding to a first interface in the second electromagnetic valve and an unlocking state of a target traction seat;

and determining the current voltage of the second electromagnetic valve according to the first line voltage.

Optionally, the determining the first working mode of the first electromagnetic valve according to the current voltage and the unlocking state includes:

when the current voltage is a preset high voltage and the unlocking state is an unlocking completion state, determining that the working state of a first interface in the first electromagnetic valve is an electrified state;

Determining the conduction instruction state of a second interface in the first electromagnetic valve according to the conduction state of the first interface in the first electromagnetic valve;

And determining a first working mode of the first electromagnetic valve according to the energizing state of the first interface in the first electromagnetic valve and the conducting instruction state of the second interface in the first electromagnetic valve.

Optionally, the sending the first operation mode to the second controller, so that the second controller feeds back the second operation mode of the first electromagnetic valve and the third operation mode of the second electromagnetic valve according to the first operation mode includes:

The first working mode is sent to a second controller, so that the second controller detects a third interface state of a second interface in the first electromagnetic valve and a fourth interface state of a first interface in the second electromagnetic valve according to the first working mode, detects a second line voltage of a corresponding line of the first interface in the first electromagnetic valve and a conduction instruction state of the second interface in the first electromagnetic valve according to the third interface state and the fourth interface state, determines a working state of the second interface in the first electromagnetic valve according to the second line voltage and the conduction instruction state of the second interface in the first electromagnetic valve, determines a conduction instruction state of the second interface in the second electromagnetic valve, determines a second working mode of the first electromagnetic valve according to the working state of the second interface in the first electromagnetic valve, feeds back, and determines a third working mode of the second electromagnetic valve according to the conduction instruction state of the second interface in the second electromagnetic valve and feeds back.

Optionally, the determining the fourth operation mode of the second electromagnetic valve according to the second operation mode and the third operation mode includes:

Detecting a fifth interface state of a second interface in the second electromagnetic valve according to the second working mode and the third working mode;

detecting a grounding state of a circuit corresponding to a second interface in the first electromagnetic valve and a conduction instruction state of the second interface in the second electromagnetic valve according to the fifth interface state;

Determining the grounding state of the second interface in the second electromagnetic valve according to the grounding state of the corresponding line of the second interface in the first electromagnetic valve and the conducting instruction state of the second interface in the second electromagnetic valve, and determining the conducting instruction state of the first interface in the second electromagnetic valve;

And determining a fourth working mode of the second electromagnetic valve according to the grounding state of the second interface in the second electromagnetic valve and the conducting instruction state of the first interface in the second electromagnetic valve.

Optionally, the sending the fourth operation mode to the second controller, so that the second controller feeds back the fifth operation mode of the second electromagnetic valve according to the fourth operation mode, including:

And sending the fourth working mode to the second controller, so that the second controller detects a sixth interface state of the first interface in the second electromagnetic valve according to the fourth working mode, detects a grounding state of a corresponding line of the second interface in the second electromagnetic valve and a conduction instruction state of the first interface in the second electromagnetic valve according to the sixth interface state, determines an electrifying state of the first interface in the second electromagnetic valve according to the grounding state of the corresponding line of the second interface in the second electromagnetic valve and the conduction instruction state of the first interface in the second electromagnetic valve, and determines a fifth working mode of the second electromagnetic valve according to the electrifying state of the first interface in the second electromagnetic valve and feeds back the fifth working mode.

Optionally, the controlling the target fifth gear according to the fifth operation mode includes:

detecting the current power-on state of the first electromagnetic valve and the current power-on state of the second electromagnetic valve according to the fifth working mode;

And when the current power-on state of the first electromagnetic valve and the current power-on state of the second electromagnetic valve are both preset states, controlling the target traction seat to be unlocked.

The traction seat control method is applied to a first controller in a traction seat control system, and when the current speed is detected to be the preset speed and the current working state is detected to be the preset working state, the current voltage of a second electromagnetic valve and the unlocking state of a target traction seat are obtained; determining a first working mode of a first electromagnetic valve according to the current voltage and the unlocking state, and sending the first working mode to a second controller so that the second controller feeds back a second working mode of the first electromagnetic valve and a third working mode of the second electromagnetic valve according to the first working mode; determining a fourth working mode of the second electromagnetic valve according to the second working mode and the third working mode; sending the fourth working mode to the second controller so that the second controller feeds back a fifth working mode of the second electromagnetic valve according to the fourth working mode; and controlling the target traction seat according to the fifth working mode. Through the mode, based on the electric control unlocking mode adopting the double-controller interlocking safety protection, the absolute safety of unlocking the traction seat is ensured, the possibility of unexpected unlocking of the traction seat caused by misoperation of a driver is avoided, and the accident risk of out-of-control trailer pulling in the driving process is greatly reduced.

Drawings

FIG. 1 is a block diagram of a fifth wheel control system according to an embodiment of the fifth wheel control method of the present invention;

FIG. 2 is a block diagram of a prior art system in an embodiment of a fifth wheel control method of the present invention;

FIG. 3 is a flow chart of a fifth embodiment of the fifth wheel control method of the present invention;

FIG. 4 is a schematic overall flow chart of an embodiment of a fifth wheel control method according to the present invention;

fig. 5 is a flowchart of a fifth embodiment of the fifth wheel control method of the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a fifth wheel control system according to an embodiment of the present invention.

In this embodiment, the fifth wheel control system includes: the control switch 11, the first controller 12, the second controller 13, the instrument 14, the first electromagnetic valve 15 and the second electromagnetic valve 16 are connected in series, the first interface of the first electromagnetic valve 15 is conducted by the first controller 12, the second interface of the first electromagnetic valve 15 is conducted by the second controller 13, the first interface of the second electromagnetic valve 16 is conducted by the second first and second controllers, and the second interface of the second electromagnetic valve 16 is conducted by the first controller 12; the control switch 11 is a two-gear rocker switch, and the control switch 11 comprises a locking device; the meter 14 is used to calculate a vehicle speed signal and send the vehicle speed signal to the first controller 12 and the second controller 13.

It should be noted that, as shown in fig. 2, the control scheme of the existing pneumatic unlocking traction seat adopts the electric control scheme shown in fig. 2 to often cause unexpected unlocking of the traction seat, so as to solve the above problem, and in view of the safety of the whole vehicle electrical appliance, the system of the embodiment is provided.

It can be understood that the control switch of this embodiment is a two-gear rocker switch, and has a locking device, and has an anti-false touch function, and the instrument is responsible for calculating the vehicle speed signal, and sends the calculated vehicle speed signal to the first controller and the second controller, and 2 solenoid valves are configured in the traction seat control system of this embodiment and the gas circuit is connected in series. The electromagnetic valve 1+ is controlled to be conducted by the first controller, and the electromagnetic valve 1-is controlled to be conducted by the second controller; solenoid valve 2+ is controlled to conduct by the second controller, and solenoid valve 2-is controlled to conduct by the first controller. Under the unexpected working state, the first controller/2 can disconnect the internal circuits of the 4 control ports, so that the electromagnetic valves 1/2 are in a power-off state, and the fault state (whether the external circuits are short-circuited to the ground or the power supply) of the external circuits of the 4 control ports is recovered at any time. When the two electromagnetic valves are electrified, the whole air passage can be conducted, and the traction seat can be unlocked; if only 1 electromagnetic valve is adopted, when the coil of the electromagnetic valve is accidentally short-circuited to obtain electricity, the traction seat can be unlocked, the main trailer is separated to cause accidents, and the situation can occur only by adopting 2 electromagnetic valves and simultaneously short-circuiting 2 electromagnetic valves, so that the accident probability is greatly reduced. In this embodiment, solenoid valve 1+ is the first port of the first solenoid valve, solenoid valve 1-is the second port of the first solenoid valve, solenoid valve 2+ is the first port of the second solenoid valve, solenoid valve 2-is the second port of the second solenoid valve, solenoid valve 1 is the first solenoid valve, and solenoid valve 2 is the second solenoid valve.

In the specific implementation, the traction seat unlocking control is controlled by the first controller and the second controller in an electric control interlocking way, unlocking is allowed only when the electromagnetic valve 1/2 has no short circuit fault, and the control sequence of the pilot-operated electromagnetic valve 1+ -the electromagnetic valve 1-the electromagnetic valve 2-the electromagnetic valve 2+ is followed.

An embodiment of the present invention provides a fifth wheel control method, and referring to fig. 3, fig. 3 is a schematic flow chart of a fifth wheel control method according to a first embodiment of the present invention.

In this embodiment, the fifth wheel control method is applied to the first controller in the fifth wheel control system as described above, and the method includes the steps of:

Step S10: and when the current vehicle speed is detected to be the preset vehicle speed and the current working state is detected to be the preset working state, acquiring the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat.

The execution body of the present embodiment is a first controller in the fifth wheel control system, which can control the operation of each component and device, and can perform data processing and transmission, or can be other devices that can perform this function, which is not limited in this embodiment.

It can be understood that when the vehicle is detected to be powered on, the current working state of the vehicle is described as a preset working state, and in this embodiment, the preset working state refers to the vehicle powered on state, the current speed of the vehicle is detected at this time, and when the current speed is the preset speed, if the unlock switch of the target traction seat is detected to be pressed, the current voltage of the second electromagnetic valve and the unlock state of the target traction seat are obtained at this time. In the present embodiment, the preset vehicle speed is 0km/h.

In a specific implementation, the current voltage of the second electromagnetic valve refers to the voltage of a circuit corresponding to the second interface of the second electromagnetic valve, and the unlocking state of the target traction seat refers to the completion state of the unlocking action state CAN instruction of the target traction seat.

When the vehicle is not electrified, the first controller and the second controller do not perform any action, when the vehicle is electrified and the current speed of the vehicle is not 0, the first controller and/or the second controller send fault alarm identifiers (CAN) which correspond to the 4 interfaces and are short-circuited to the ground or to a power supply, meanwhile, the instrument displays faults, at the moment, the first controller and/or the second controller detects the short-circuited faults, or receives any line short-circuited fault alarm identifiers sent by the other controller on a CAN bus, the 2 controllers immediately control the first interface and the second interface of the first electromagnetic valve, the first interface and the second interface of the second electromagnetic valve, namely the internal circuits of the electromagnetic valve 1+/-, the electromagnetic valve 2+/-, and at the moment, any operation 2 controllers cannot conduct the control ports until the faults disappear, so as to ensure that the two electromagnetic valves are in a power-off state. At the moment, the first electromagnetic valve and/or the second electromagnetic valve are/is powered off, the air path is cut off, and the traction seat does not unlock.

It can be appreciated that, in order to accurately obtain the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat, further, when the current vehicle speed is detected to be the preset vehicle speed and the current working state is detected to be the preset working state, obtaining the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat includes: detecting a first interface state of a first interface in the first electromagnetic valve and a second interface state of a second interface in the second electromagnetic valve when the current vehicle speed is detected to be a preset vehicle speed and the current working state is detected to be a preset working state; when the first interface state and the second interface state are both preset states, acquiring a first line voltage of a line corresponding to a first interface in the second electromagnetic valve and an unlocking state of a target traction seat; and determining the current voltage of the second electromagnetic valve according to the first line voltage.

In specific implementation, when the current vehicle speed is detected to be the preset vehicle speed and the current working state is the preset working state, the first controller detects that the ON gear is electrified and the current vehicle speed is the preset vehicle speed, the first controller detects interface states of a first interface 1+ of the first electromagnetic valve and a second interface 2-of the second electromagnetic valve, when the first interface 1+ of the first electromagnetic valve and the second interface 2-of the second electromagnetic valve have no ground/power short circuit fault, the first interface states and the second interface states are both preset states, at the moment, the voltage of a circuit corresponding to the first interface of the second electromagnetic valve is acquired, the voltage of a first interface 2+ circuit of the second electromagnetic valve is the first circuit voltage, the unlocking state of the target traction seat is acquired, and the first circuit voltage is taken as the current voltage of the second electromagnetic valve.

Step S20: and determining a first working mode of the first electromagnetic valve according to the current voltage and the unlocking state, and sending the first working mode to a second controller so that the second controller feeds back a second working mode of the first electromagnetic valve and a third working mode of the second electromagnetic valve according to the first working mode.

When the current voltage does not exist and the CAN instruction of the target traction seat in the unlocking state is in an unlocking action state is incomplete, entering a next step to determine a first working mode of the first electromagnetic valve, wherein the first working mode is that a first interface 1+ of the first electromagnetic valve is electrified and a second interface 1-on CAN instruction of the first electromagnetic valve is sent as permission, and the duration time is 30s; or when the current voltage is high voltage and the CAN command of the target traction seat is in an unlocking action state, determining that the first working mode is that the first interface 1+ of the first electromagnetic valve is electrified and transmitting the second interface 1-on CAN command of the first electromagnetic valve is allowed, wherein the duration is 30s. In this embodiment, the first controller detects that the solenoid valve 2+ line is not voltage and the fifth wheel unlocking action state CAN command is incomplete (i.e., ensures that the solenoid valve 2 is not energized at this time); or the first controller detects that the high voltage of the solenoid valve 2+ line and the CAN command of the unlocking action state of the traction seat is finished, and then the first working mode of the first solenoid valve is determined.

It CAN be understood that when the ON gear is not satisfied and the current vehicle speed is the preset vehicle speed, the controller 1 back-draws the electromagnetic valve 1+/2-line and has no fault alarm identifier (CAN) to ground or power short circuit, the first controller detects the electromagnetic valve 2+ line and the traction seat unlocking action state CAN instruction is incomplete, the first controller detects the electromagnetic valve 2+ line high voltage and the traction seat unlocking action state CAN instruction is any one condition in being completed, the first controller controls the first interface 1+ of the first electromagnetic valve to be disconnected, and sends the second interface 1-ON CAN instruction of the first electromagnetic valve to be forbidden, the first controller and/or the second controller sends fault alarm identifiers (CAN) corresponding to the 4 interfaces and short-circuited to ground or power, meanwhile, the instrument displays faults, at the moment, the first controller and/or the second controller detects the short-circuited faults, or receives any line short-circuited fault alarm identifier sent by the other controller ON the CAN bus, the 2 controllers immediately control the first interface and the second interface of the first electromagnetic valve, the first interface and the second interface of the second electromagnetic valve, namely, the first interface 1+/2 interfaces of the electromagnetic valve are disconnected, and the electromagnetic valve is not controlled to be in a fault state until any two internal interfaces of the electromagnetic valve are disconnected, and the electromagnetic valve 2 is guaranteed to be in fault state. At the moment, the first electromagnetic valve and/or the second electromagnetic valve are/is powered off, the air path is cut off, and the traction seat does not unlock.

In a specific implementation, in order to accurately obtain the first working mode of the first electromagnetic valve, further, the determining the first working mode of the first electromagnetic valve according to the current voltage and the unlocking state includes: when the current voltage is a preset high voltage and the unlocking state is an unlocking completion state, determining that the working state of a first interface in the first electromagnetic valve is an electrified state; determining the conduction instruction state of a second interface in the first electromagnetic valve according to the conduction state of the first interface in the first electromagnetic valve; and determining a first working mode of the first electromagnetic valve according to the energizing state of the first interface in the first electromagnetic valve and the conducting instruction state of the second interface in the first electromagnetic valve.

When the solenoid valve 2+ line is high voltage and the traction seat unlocking action state CAN instruction is completed, the current voltage is preset high voltage and the unlocking state is unlocking completion state, at this time, the working state of the first interface 1+ of the first solenoid valve is determined to be the power-on state, the conduction instruction state of the second interface 1-of the first solenoid valve is determined to be the permission state, namely, the first working mode of the first solenoid valve is that the first interface 1+ of the first solenoid valve is powered on and the second interface 1-conduction CAN instruction of the first solenoid valve is sent to be permission, and the duration is 30s.

It CAN be understood that when the solenoid valve 2+ line is not voltage and the traction seat unlocking action state CAN instruction is incomplete, the first working mode of the first solenoid valve is that the first interface 1+ of the first solenoid valve is electrified and the second interface 1-on CAN instruction of the first solenoid valve is sent as permission, and the duration is 30s. In this embodiment, the first controller performs cycle diagnosis within 30 seconds, and if the first controller does not meet the control command at any time, the first controller exits the control command.

In a specific implementation, after determining the first operating mode of the first solenoid valve, the second controller performs diagnosis while feeding back the second operating mode of the first solenoid valve and the third operating mode of the second solenoid valve. In this embodiment, the second operating mode is the second interface 1-ground of the first solenoid valve, the third operating mode of the second solenoid valve is the second interface 2-on CAN command of the second solenoid valve as enabled, and the duration is 30s.

Step S30: and determining a fourth working mode of the second electromagnetic valve according to the second working mode and the third working mode.

When the second operating mode is the second interface 1-grounding of the first electromagnetic valve, the third operating mode of the second electromagnetic valve is the second interface 2-on CAN command of the second electromagnetic valve as permission, and the duration is 30s, the first controller performs diagnosis and determines the fourth operating mode of the second electromagnetic valve based on the diagnosis result. In this embodiment, the fourth operation mode is that the second interface 2 of the second electromagnetic valve is grounded and the first interface 2+ turn-on CAN command of the second electromagnetic valve is transmitted as permission, and the duration is 30s.

It may be appreciated that, in order to accurately obtain the fourth operation mode of the second electromagnetic valve, further, the determining the fourth operation mode of the second electromagnetic valve according to the second operation mode and the third operation mode includes: detecting a fifth interface state of a second interface in the second electromagnetic valve according to the second working mode and the third working mode; detecting a grounding state of a circuit corresponding to a second interface in the first electromagnetic valve and a conduction instruction state of the second interface in the second electromagnetic valve according to the fifth interface state; determining the grounding state of the second interface in the second electromagnetic valve according to the grounding state of the corresponding line of the second interface in the first electromagnetic valve and the conducting instruction state of the second interface in the second electromagnetic valve, and determining the conducting instruction state of the first interface in the second electromagnetic valve; and determining a fourth working mode of the second electromagnetic valve according to the grounding state of the second interface in the second electromagnetic valve and the conducting instruction state of the first interface in the second electromagnetic valve.

In a specific implementation, when the first controller detects that the ON gear is powered ON and the current vehicle speed is the preset vehicle speed, the first controller detects the interface state of the second interface 2-of the second electromagnetic valve, when the second interface 2-of the second electromagnetic valve has no ground/power short circuit fault, the fifth interface state is the preset state, at this time, the grounding state of the second interface 1-of the first electromagnetic valve corresponding to the circuit and the conducting instruction state (namely, the check message and the hard wire guarantee logic are correct) of the second interface 2-of the second electromagnetic valve are detected, when the grounding state is the normal grounding state, the conducting instruction state is the conducting CAN instruction to be the permission state, the grounding state of the second interface of the second electromagnetic valve is determined, and the conducting instruction state of the first interface of the second electromagnetic valve is determined, so that a fourth working mode of the second electromagnetic valve is obtained, at this time, the fourth working mode is that the second interface 2-of the second electromagnetic valve is grounded and the first interface 2+CAN instruction of the second electromagnetic valve is sent for permission, and the duration is 30s. In the present embodiment, the first controller 30s performs internal circulation diagnosis, and if the internal circulation diagnosis is not satisfied at any time, the control is exited.

It should be noted that, when the ON gear is not satisfied and the current vehicle speed is the preset vehicle speed, the controller 1 extracts the electromagnetic valve 2-line and has no ground/power short-circuit fault, the first controller detects any one condition of the electromagnetic valve 1-line grounding and the electromagnetic valve 2-ON CAN command being allowed, the first controller controls the second interface 2-off of the second electromagnetic valve, and sends the first interface 2+ ON CAN command of the second electromagnetic valve to be forbidden, the first controller and/or the second controller sends a fault alarm identifier (CAN) of the ground or power short-circuit corresponding to the 4 interfaces, and meanwhile, the meter displays the fault, at this time, the first controller and/or the second controller detects the short-circuit fault, or receives any line short-circuit fault alarm identifier sent by the other controller ON the CAN bus, the 2 controllers immediately control the first interface and the second interface of the first electromagnetic valve, the first interface and the second interface of the second electromagnetic valve, that is, the internal circuits of the electromagnetic valve 1+/-, the electromagnetic valve 2 +/-four interfaces are disconnected, at this time, any operation 2 controllers will not conduct the control interfaces until the two electromagnetic valves are guaranteed to be in a power-off state. At the moment, the first electromagnetic valve and/or the second electromagnetic valve are/is powered off, the air path is cut off, and the traction seat does not unlock.

Step S40: and sending the fourth working mode to the second controller so that the second controller feeds back the fifth working mode of the second electromagnetic valve according to the fourth working mode.

After determining the fourth operation mode of the second solenoid valve, the second controller performs diagnosis while feeding back the fifth operation mode of the second solenoid valve. In this embodiment, the fifth working mode is that the first interface 2+ of the second electromagnetic valve is powered on and sends the traction seat unlocking action state CAN command to be completed, and the duration is 30s.

Step S50: and controlling the target traction seat according to the fifth working mode.

It should be noted that, in order to accurately control the target fifth wheel, further, the controlling the target fifth wheel according to the fifth operation mode includes: detecting the current power-on state of the first electromagnetic valve and the current power-on state of the second electromagnetic valve according to the fifth working mode; and when the current power-on state of the first electromagnetic valve and the current power-on state of the second electromagnetic valve are both preset states, controlling the target traction seat to be unlocked.

It can be understood that after the second electromagnetic valve works according to the fifth mode, the current power-on states of the first electromagnetic valve and the second electromagnetic valve are detected, when the current power-on states of the first electromagnetic valve and the second electromagnetic valve are both normal power-on states, the power-on states of the first electromagnetic valve and the second electromagnetic valve are both preset states, and at the moment, the target traction seat is determined to be successfully unlocked. The control flow of the present embodiment is shown in fig. 4.

The traction seat control method is applied to a first controller in a traction seat control system, and when the current speed is detected to be the preset speed and the current working state is detected to be the preset working state, the current voltage of a second electromagnetic valve and the unlocking state of a target traction seat are obtained; determining a first working mode of a first electromagnetic valve according to the current voltage and the unlocking state, and sending the first working mode to a second controller so that the second controller feeds back a second working mode of the first electromagnetic valve and a third working mode of the second electromagnetic valve according to the first working mode; determining a fourth working mode of the second electromagnetic valve according to the second working mode and the third working mode; sending the fourth working mode to the second controller so that the second controller feeds back a fifth working mode of the second electromagnetic valve according to the fourth working mode; and controlling the target traction seat according to the fifth working mode. Through the mode, based on the electric control unlocking mode adopting the double-controller interlocking safety protection, the absolute safety of unlocking the traction seat is ensured, the possibility of unexpected unlocking of the traction seat caused by misoperation of a driver is avoided, and the accident risk of out-of-control trailer pulling in the driving process is greatly reduced.

Referring to fig. 5, fig. 5 is a flowchart of a fifth embodiment of a fifth wheel control method according to the present invention.

Based on the above first embodiment, the fifth wheel control method of the present embodiment includes, in the step S20:

Step S21: the first working mode is sent to a second controller, so that the second controller detects a third interface state of a second interface in the first electromagnetic valve and a fourth interface state of a first interface in the second electromagnetic valve according to the first working mode, detects a second line voltage of a corresponding line of the first interface in the first electromagnetic valve and a conduction instruction state of the second interface in the first electromagnetic valve according to the third interface state and the fourth interface state, determines a working state of the second interface in the first electromagnetic valve according to the second line voltage and the conduction instruction state of the second interface in the first electromagnetic valve, determines a conduction instruction state of the second interface in the second electromagnetic valve, determines a second working mode of the first electromagnetic valve according to the working state of the second interface in the first electromagnetic valve, feeds back, and determines a third working mode of the second electromagnetic valve according to the conduction instruction state of the second interface in the second electromagnetic valve and feeds back.

When the first working mode is that the first interface 1+ of the first electromagnetic valve is electrified and sends a second interface 1-conduction CAN instruction of the first electromagnetic valve to be allowed, and the duration is 30s, the second controller diagnoses that the ON gear is electrified and the current vehicle speed is the preset vehicle speed, when the second controller detects that the first interface 2+ of the second electromagnetic valve and the second interface 1-of the first electromagnetic valve are in an interface state, when the first interface 2+ of the second electromagnetic valve and the second interface 1-of the first electromagnetic valve have no ground/power short circuit fault, the third interface state and the fourth interface state are both in preset states, at the moment, the second line voltage of a line corresponding to the first interface 1+ of the first electromagnetic valve and the conduction instruction state (namely, check message and hard wire guarantee logic are correct), when the second line voltage is high voltage and the conduction instruction state is the allowed state, the grounding state of the second interface 1-of the first electromagnetic valve is determined, and when the second interface 2-of the second electromagnetic valve is in a conduction instruction state, the second interface 2-of the second electromagnetic valve is continuously operated in a working mode, and the second interface 2-of the second electromagnetic valve is continuously enabled, and the second working mode is 30s is obtained. In the present embodiment, the second controller 30s performs internal circulation diagnosis, and if the internal circulation diagnosis is not satisfied at any time, the control is exited.

It CAN be understood that when the ON gear is not satisfied and the current vehicle speed is the preset vehicle speed, the controller 2 extracts the solenoid valve 2+/1-control port without a short circuit fault to ground/power supply, the second controller detects that the controller 2 detects that the solenoid valve 1+ line is high voltage and the solenoid valve 1-ON CAN command is any condition in the permission, the second controller controls the second interface 1-of the first solenoid valve to be disconnected, and sends the second interface 2-ON CAN command of the second solenoid valve to be forbidden, the first controller and/or the second controller sends a fault alarm identifier (CAN) of the short circuit to ground or power supply corresponding to 4 interfaces, and the meter displays the fault, at the moment, the first controller and/or the second controller detects the short circuit fault, or receives any line short circuit fault alarm identifier sent by the other controller ON the CAN bus, the 2 controllers immediately control the first interface and the second interface of the first solenoid valve, namely the first interface and the second interface of the solenoid valve 1+/-, the internal circuit of the solenoid valve 2 interfaces to be disconnected, and any operation of the controller CAN not guarantee that the two solenoid valves are in the state of being in the power failure state until the two non-powered interfaces disappear. At the moment, the first electromagnetic valve and/or the second electromagnetic valve are/is powered off, the air path is cut off, and the traction seat does not unlock.

In a specific implementation, in order to accurately obtain the fifth working mode of the second electromagnetic valve, further, the sending the fourth working mode to the second controller, so that the second controller feeds back the fifth working mode of the second electromagnetic valve according to the fourth working mode includes: and sending the fourth working mode to the second controller, so that the second controller detects a sixth interface state of the first interface in the second electromagnetic valve according to the fourth working mode, detects a grounding state of a corresponding line of the second interface in the second electromagnetic valve and a conduction instruction state of the first interface in the second electromagnetic valve according to the sixth interface state, determines an electrifying state of the first interface in the second electromagnetic valve according to the grounding state of the corresponding line of the second interface in the second electromagnetic valve and the conduction instruction state of the first interface in the second electromagnetic valve, and determines a fifth working mode of the second electromagnetic valve according to the electrifying state of the first interface in the second electromagnetic valve and feeds back the fifth working mode.

When the fourth working mode is that the second interface 2-of the second electromagnetic valve is grounded and a first interface 2+ ON CAN command of the second electromagnetic valve is transmitted as permission, and the duration is 30s, the second controller diagnoses that the ON gear is electrified and when the current vehicle speed is the preset vehicle speed, the second controller detects the interface state of the first interface 2+ of the second electromagnetic valve, when the first interface 2+ of the second electromagnetic valve has no ground/power short circuit fault, the sixth interface state and the fourth interface state are both preset states, at this time, the grounding state of the second interface 2-of the second electromagnetic valve corresponding line and the ON command state (namely, check message and hard wire guarantee logic are correct) of the first interface 2+ of the second electromagnetic valve are detected, when the ON command state is the permission state of the ON CAN command, the electrified state of the first interface 2+ of the second electromagnetic valve is determined, and the fifth working mode of the second electromagnetic valve is obtained, at this time, the fifth working mode is that the first interface 2+ of the second electromagnetic valve is electrified state, and the traction seat is continuously transmitted as the traction command 30s. In the present embodiment, the second controller 30s performs internal circulation diagnosis, and if the internal circulation diagnosis is not satisfied at any time, the control is exited.

It CAN be understood that when the ON gear is not satisfied and the current vehicle speed is the preset vehicle speed, the controller 2 extracts the electromagnetic valve 2+ control port without a short circuit fault to ground/power, the second controller detects any line short circuit fault alarm identifier sent by the controller 2 ON the CAN bus, the second controller immediately controls the first interface 2+ disconnection of the second electromagnetic valve and sends the traction seat unlocking action state CAN instruction to be incomplete, the first controller and/or the second controller sends fault alarm identifiers (CAN) of the short circuit to ground or power corresponding to the 4 interfaces, and the instrument displays the fault, at the moment, the first controller and/or the second controller detects the short circuit fault, or receives any line short circuit fault alarm identifier sent by the other controller ON the CAN bus, the 2 controllers immediately control the first interface and the second interface of the first electromagnetic valve and the first interface and the second interface of the second electromagnetic valve, namely the internal circuits of the electromagnetic valve 1+/-, the electromagnetic valve 2 +/-four interfaces, at any operation 2 controllers cannot be conducted until the two electromagnetic valves disappear, and the fault state is guaranteed. At the moment, the first electromagnetic valve and/or the second electromagnetic valve are/is powered off, the air path is cut off, and the traction seat does not unlock.

According to the embodiment, the first working mode is sent to the second controller, so that the second controller detects a third interface state of a second interface in the first electromagnetic valve and a fourth interface state of a first interface in the second electromagnetic valve according to the first working mode, detects a second line voltage of a corresponding line of the first interface in the first electromagnetic valve and a conduction instruction state of the second interface in the first electromagnetic valve according to the third interface state and the fourth interface state, determines a working state of the second interface in the first electromagnetic valve according to the second line voltage and the conduction instruction state of the second interface in the first electromagnetic valve, determines a conduction instruction state of the second interface in the second electromagnetic valve, determines a second working mode of the first electromagnetic valve according to the working state of the second interface in the first electromagnetic valve, feeds back the second working mode, and determines a third working mode of the second electromagnetic valve according to the conduction instruction state of the second interface in the second electromagnetic valve and feeds back the third working mode. Through the mode, the second working mode and the third working mode are accurately obtained, and normal operation of unlocking of the subsequent traction seat is ensured.

It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.

In addition, technical details not described in detail in the present embodiment may refer to the fifth wheel control method provided in any embodiment of the present invention, and are not described herein.

Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A fifth wheel control system, the fifth wheel control system comprising: the device comprises a control switch, a first controller, a second controller, an instrument, a first electromagnetic valve and a second electromagnetic valve, wherein the first electromagnetic valve is connected with a gas path of the second electromagnetic valve in series, a first interface of the first electromagnetic valve is conducted by the first controller, a second interface of the first electromagnetic valve is conducted by the second controller, a first interface of the second electromagnetic valve is conducted by the second controller, and a second interface of the second electromagnetic valve is conducted by the first controller.

2. The fifth wheel control system of claim 1, wherein the control switch is a two-position rocker switch, and wherein the control switch includes a locking device.

3. The fifth wheel control system of claim 1, wherein the meter is configured to calculate a vehicle speed signal and send the vehicle speed signal to the first controller and the second controller.

4. A fifth wheel control method, characterized in that the fifth wheel control method is applied to a first controller in a fifth wheel system according to claims 1 to 3, the fifth wheel method comprising:

When the current vehicle speed is detected to be the preset vehicle speed and the current working state is detected to be the preset working state, the current voltage of the second electromagnetic valve and the unlocking state of the target traction seat are obtained;

Determining a first working mode of a first electromagnetic valve according to the current voltage and the unlocking state, and sending the first working mode to a second controller so that the second controller feeds back a second working mode of the first electromagnetic valve and a third working mode of the second electromagnetic valve according to the first working mode;

determining a fourth working mode of the second electromagnetic valve according to the second working mode and the third working mode;

Sending the fourth working mode to the second controller so that the second controller feeds back a fifth working mode of the second electromagnetic valve according to the fourth working mode;

And controlling the target traction seat according to the fifth working mode.

5. The method for controlling a fifth wheel of a vehicle according to claim 4, wherein when the current vehicle speed is detected to be a preset vehicle speed and the current operating state is detected to be a preset operating state, obtaining the current voltage of the second electromagnetic valve and the unlock state of the target fifth wheel comprises:

Detecting a first interface state of a first interface in the first electromagnetic valve and a second interface state of a second interface in the second electromagnetic valve when the current vehicle speed is detected to be a preset vehicle speed and the current working state is detected to be a preset working state;

when the first interface state and the second interface state are both preset states, acquiring a first line voltage of a line corresponding to a first interface in the second electromagnetic valve and an unlocking state of a target traction seat;

and determining the current voltage of the second electromagnetic valve according to the first line voltage.

6. The fifth wheel control method of claim 4, wherein said determining a first operating mode of the first solenoid valve based on said current voltage and said unlocked state comprises:

when the current voltage is a preset high voltage and the unlocking state is an unlocking completion state, determining that the working state of a first interface in the first electromagnetic valve is an electrified state;

Determining the conduction instruction state of a second interface in the first electromagnetic valve according to the conduction state of the first interface in the first electromagnetic valve;

And determining a first working mode of the first electromagnetic valve according to the energizing state of the first interface in the first electromagnetic valve and the conducting instruction state of the second interface in the first electromagnetic valve.

7. The fifth wheel control method of claim 4, wherein said transmitting said first operating mode to a second controller to cause said second controller to feed back a second operating mode of said first solenoid valve and a third operating mode of said second solenoid valve based on said first operating mode comprises:

The first working mode is sent to a second controller, so that the second controller detects a third interface state of a second interface in the first electromagnetic valve and a fourth interface state of a first interface in the second electromagnetic valve according to the first working mode, detects a second line voltage of a corresponding line of the first interface in the first electromagnetic valve and a conduction instruction state of the second interface in the first electromagnetic valve according to the third interface state and the fourth interface state, determines a working state of the second interface in the first electromagnetic valve according to the second line voltage and the conduction instruction state of the second interface in the first electromagnetic valve, determines a conduction instruction state of the second interface in the second electromagnetic valve, determines a second working mode of the first electromagnetic valve according to the working state of the second interface in the first electromagnetic valve, feeds back, and determines a third working mode of the second electromagnetic valve according to the conduction instruction state of the second interface in the second electromagnetic valve and feeds back.

8. The fifth wheel control method of claim 4, wherein said determining a fourth operating mode of said second solenoid valve based on said second operating mode and said third operating mode comprises:

Detecting a fifth interface state of a second interface in the second electromagnetic valve according to the second working mode and the third working mode;

detecting a grounding state of a circuit corresponding to a second interface in the first electromagnetic valve and a conduction instruction state of the second interface in the second electromagnetic valve according to the fifth interface state;

Determining the grounding state of the second interface in the second electromagnetic valve according to the grounding state of the corresponding line of the second interface in the first electromagnetic valve and the conducting instruction state of the second interface in the second electromagnetic valve, and determining the conducting instruction state of the first interface in the second electromagnetic valve;

And determining a fourth working mode of the second electromagnetic valve according to the grounding state of the second interface in the second electromagnetic valve and the conducting instruction state of the first interface in the second electromagnetic valve.

9. The fifth operating mode of the second solenoid valve according to claim 4, wherein said transmitting the fourth operating mode to the second controller to cause the second controller to feed back the fifth operating mode of the second solenoid valve according to the fourth operating mode includes:

And sending the fourth working mode to the second controller, so that the second controller detects a sixth interface state of the first interface in the second electromagnetic valve according to the fourth working mode, detects a grounding state of a corresponding line of the second interface in the second electromagnetic valve and a conduction instruction state of the first interface in the second electromagnetic valve according to the sixth interface state, determines an electrifying state of the first interface in the second electromagnetic valve according to the grounding state of the corresponding line of the second interface in the second electromagnetic valve and the conduction instruction state of the first interface in the second electromagnetic valve, and determines a fifth working mode of the second electromagnetic valve according to the electrifying state of the first interface in the second electromagnetic valve and feeds back the fifth working mode.

10. The fifth operation mode according to claim 4, wherein said controlling said target fifth operation mode comprises:

detecting the current power-on state of the first electromagnetic valve and the current power-on state of the second electromagnetic valve according to the fifth working mode;

And when the current power-on state of the first electromagnetic valve and the current power-on state of the second electromagnetic valve are both preset states, controlling the target traction seat to be unlocked.