A control method for an automotive window switch system

Abstract

The application relates to a control method of an automobile window switch system, which comprises a driver side switch module and a non-driver side switch module, each unit module is connected with the driver side switch module through an A line and a B line, the driver side switch module comprises a main control unit, the main control unit controls the switching of three states that the A line is grounded and the B line is connected with a power supply, the A line is connected with the power supply and the B line is grounded, and the A line and the B line are simultaneously grounded; a main detection unit is connected with the main control unit, detects the current passing through the A and B line loops and receives the state feedback of the non-driver side switch module; each unit module comprises a rectifier unit, an energy storage unit, a control unit and a detection unit. By adopting the technical scheme, the application provides a control method of the automobile window switch system, which can provide the backlight power supply required by the non-driver switch work, and can realize the direction control and working power supply required for driving the window glass to rise and fall.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile switch technology, in particular to a control method of automobile window switch system. BACKGROUND

[0002] The automobile window switch system is a functional system that controls the four door glass windows to rise and fall through the driver side and can control the non-driver door switch work. The passenger can operate the non-driver door switch to control the window glass to rise and fall in the position, the driver can control the four window glasses to rise and fall and has the function of prohibiting the non-driver door switch work, and decides whether the window can be raised and lowered according to the working state of the generator. In order to facilitate the observation of the switch at night, the switch will have a backlight, and the backlight is controlled by the backlight power supply on the vehicle.

[0003] The current common hard-wired window switch system is a nineteen-wire type, such as Figure 1 As described above, the work of the three non-driver switches each needs independent power supply, ground and enable control, so that the wire harness quantity of the whole system is large. Another common bus type switch system, such as Figure 2 As described above, since the bus is only a communication line, the work of the three non-driver switches still needs independent power supply, ground, so that the wire harness quantity still reaches thirteen lines, and a special bus communication chip is needed. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art, and the present application provides a control method of automobile window switch system, which can provide the backlight power supply required by the non-driver switch work, and can realize the direction control and power supply required for driving the window glass to rise and fall, so that the number of conductive wires required by the whole system is reduced to ten.

[0005] The technical scheme of the present application is a control method of automobile window switch system, including a driver side switch module and a non-driver side switch module, the non-driver side switch module includes at least three unit modules with the same structure, each unit module is connected with the driver side switch module through an A line and a B line, wherein the driver side switch module includes a main control unit: controlling the switching of three states that the A line is grounded and the B line is connected to the power supply, the A line is connected to the power supply and the B line is grounded, and the A and B lines are simultaneously grounded, the input end of the A and B lines is connected with the output end of the main control unit;

[0006] The main control unit: connected with the main control unit, and detecting the current passing through the A and B line loop and receiving the state feedback of the non-driver side switch module;

[0007] Each unit module includes a rectifier unit, an energy storage unit, a control unit and a detection unit, wherein,

[0008] The rectifier unit: converts alternating voltage to direct current voltage, the output end of the A and B lines is connected with the input end of the rectifier unit;

[0009] Energy storage unit: for storing electrical energy, providing power for the control unit, for temporary power supply in the case of alternating power-off of the two lines, set between the rectifier unit and the control unit, and respectively connected with the output end of the rectifier unit and the input end of the control unit;

[0010] Detection unit: detecting the voltage change on the two lines for receiving the driver's action instruction and transmitting the action instruction to the control unit, respectively connected with the two lines and the control unit;

[0011] Control unit, output end connected with the window motor, after receiving the driver's action instruction or the non-driver's switch operation instruction, control the window lifting movement;

[0012] When the A line and the B line are in the ground state at the same time, the non-driver's switch has no power supply, and the non-driver's switch is in the locked state and cannot operate the window switch by itself;

[0013] After the A and B lines are switched between the first and second states, the non-driver's switch can operate the window lifting;

[0014] After the main detection unit identifies that the A line is connected to the power supply and the B line is connected to the ground and maintains the set time, and the main detection unit feeds back to the main control unit that the control unit has entered the preparation state through the current change of the connected load every interval, the main control unit controls the A and B lines according to the corresponding instructions;

[0015] The control unit enters the preparation state, the A line outputs PWM, and the non-driver's switch performs backlight work, at this time the non-driver's window switch is in the non-operation state.

[0016] Further setting, when the A and B lines are alternately changed for an odd number of times, the A line is connected to the power supply and the B line is connected to the ground, indicating that the non-driver's switch can be controlled to lift the window; when the A and B lines are alternately changed for an even number of times, the A line is connected to the ground and the B line is connected to the power supply, indicating that the non-driver's switch can be controlled to lower the window.

[0017] Further setting, the set time is 2-4s.

[0018] Further setting, the interval time is 1-3s.

[0019] Further setting, the current change range is 40-60mA.

[0020] The technical effect of the present invention is as follows: the driver-side switch and the non-driver-side switch are connected by A and B wires, and the non-driver side no longer needs to be connected to the power supply, ground, and backlight power supply. The automobile switch system using ten hard wires realizes the functions of window lifting and lowering control, backlight control, and prohibiting the non-driver side from operating the windows. Compared with the existing technology, the wiring harness is less, the weight and number of the wiring harness can be reduced, the connector pin requirements of the product are simplified, the wiring harness of the entire system is simpler, and no special bus communication chip is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the background art using 19 hard wires;

[0022] Figure 2 This is a schematic diagram of the background art using 13 hard wires;

[0023] Figure 3 This is a schematic diagram of a case where 10 hard wires are used in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In the description of the present invention, “several” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] like Figures 1-3 As shown, a control method for a car window switch system includes a driver side switch module and a non-driver side switch module. The non-driver side switch module includes at least three unit modules with the same structure. The driver side switch module is provided with a power input connection line, a ground connection line, a backlight control connection line and an engine ignition signal connection line (respectively Figures 1-31, 2, 3 and 4 lines in the figure belong to the prior art, so no further explanation is needed. Each unit module is connected to the driver side switch module through the A line and the B line. The connection between the driver side switch and the non-driver side switch is realized by the A and B lines. The non-driver side does not need to be connected to the power supply, ground and backlight power supply any more;

[0029] The driver side switch module includes a main control unit that controls the switching of the three states of the A line connected to the ground and the B line connected to the power supply, the A line connected to the power supply and the B line connected to the ground, and the A and B lines connected to the ground at the same time. The input ends of the A and B lines are connected to the output end of the main control unit.

[0030] The main inspection unit is connected to the main control unit and detects the current passing through the A and B line loop and receives the state feedback of the non-driver side switch module.

[0031] Each unit module includes a rectifier unit, an energy storage unit, a control unit and a detection unit.

[0032] The rectifier unit converts alternating voltage to direct current voltage. The output ends of the A and B lines are connected to the input end of the rectifier unit.

[0033] The energy storage unit is used to store electrical energy and provide power supply for the control unit. It is used for temporary power supply in the case of A and B line alternation power failure. It is arranged between the rectifier unit and the control unit and is connected to the output end of the rectifier unit and the input end of the control unit respectively.

[0034] The detection unit detects the voltage change on the A and B lines to receive the action instruction of the driver side and transmits the action instruction to the control unit. It is connected to the A and B lines and the control unit respectively.

[0035] The control unit is connected to the output end of the vehicle window motor. After receiving the driver side action instruction or the non-driver side switch operation instruction, it controls the vehicle window lifting movement.

[0036] When the A line and the B line are maintained in the grounded state at the same time, the non-driver side switch has no power supply and is in a locked state and cannot operate the vehicle window switch by itself.

[0037] After the A and B lines are switched to the first and second states, the non-driver side switch can operate the vehicle window.

[0038] The main inspection unit identifies that the A line is connected to the power supply and the B line is connected to the ground and maintains the set time. The main inspection unit feeds back to the main control unit that the control unit has entered the preparation state through the current change of the connected load every interval. The main control unit controls the A and B line states according to the corresponding instructions.

[0039] The control unit enters the preparation state, the A line outputs PWM, and the non-driver side switch performs backlight work. At this time, the non-driver side vehicle window switch is in an inoperative state.

[0040] Further, when the A and B lines are AC converted for an odd number of times, the A line is connected to the power supply and the B line is connected to the ground, it indicates that the non-driver side switch can be controlled to rise the window; when the A and B lines are AC converted for an even number of times, the A line is connected to the ground and the B line is connected to the power supply, it indicates that the non-driver side switch can be controlled to lower the window.

[0041] Specifically, the set time is 2-4s, preferably 3s. The interval time is 1-3s, preferably 2s, and the current variation range is 40-6050mA, preferably 50mA.

[0042] The A and B lines are connected to the main control unit and the main detection unit in the driver side switch. The main control unit can control the switching of the A line connected to the power supply or the ground, and the switching of the B line connected to the ground or the power supply, the switching of the A line connected to the power supply and the B line connected to the ground, the A line connected to the ground and the B line connected to the power supply, and the A and B lines connected to the ground at the same time. The main detection unit can detect the current through the A and B line loop, thereby receiving the state feedback of the non-driver side switch. The main control unit cooperates with the main detection unit to provide the working instructions and the appropriate working power supply to the non-driver side switch, and the main detection unit identifies the working state of the non-driver side switch and transmits it to the main control unit.

[0043] The A and B lines are connected to the detection unit and the rectifier unit in the non-driver side switch. The detection unit can identify the voltage state on the A and B lines to support receiving the action instructions from the driver side, and the rectifier unit can convert the AC voltage to DC voltage. The energy storage unit provides short-term power supply guarantee for the control unit. The control unit controls the window lifting according to the received driver side action instructions and non-driver side switch operation instructions.

[0044] After the A and B lines are AC converted for three times (the A and B line state changes three times, the state is

A line, B line

ground, power supply

power supply, ground

ground, power supply

[0045] After the A and B lines are AC converted for two times (the A and B line state changes three times, the state is

A line, B line

ground, power supply

power supply, ground

[0046] The A and B lines are connected to the ground at the same time, and the non-driver side switch has no power supply and is in the state of being prohibited to lock the window and cannot be operated.

[0047] After the A line is powered on, it remains connected to the power supply, and the B line remains connected to the ground, indicating that there is no instruction from the driver side, and the non-driver side is controlled to rise and lower according to the operation of the passengers on the side, and the current is in the daytime mode, and the backlight does not need to be bright.

[0048] Non-driver side in the passenger operation, priority lower than the driver side control, no control conflict, non-driver side by the control unit to change the circuit current, the driver side to provide a line power B line ground state for non-driver side work power supply.

[0049] Figure 3 For example, the implementation circuit can be in other forms, as long as the ten hard line implementation function can be met, the number of switches is taken as an example of three passenger window control, if the vehicle has more door and window control, the same reason similar.

[0050] The main control unit of the driver side switch is 5, 6 line grounding, power supply, PWM signal, etc., according to the driver operation and the feedback information of the non-driver side switch to control. The other three 7, 8, 9, 10 are similar.

[0051] The main control unit of the driver side switch is 5, 6 line grounding, power supply, PWM signal, etc., according to the driver operation and the feedback information of the non-driver side switch to control. The other three 7, 8, 9, 10 are similar.

[0052] The left rear switch, the right rear switch and the right front switch are similar in internal unit structure. Here, the right front switch is described.

[0053] The rectifier unit of the right front switch can convert the AC power on the 5, 6 line into DC power for the energy storage and control unit behind it.

[0054] The energy storage unit of the right front switch can temporarily store some power, so that when the 5, 6 line power is alternating or PWM is interrupted, there is still enough power to supply the control unit for control and detection.

[0055] The detection unit of the right front switch can identify the voltage state of the 5, 6 line, which is used by the control unit to determine whether the signal transmission has been performed.

Claims

1. A control method for an automobile window switch system, comprising a driver-side switch module and a non-driver-side switch module, wherein the non-driver-side switch module comprises at least three unit modules with the same structure, characterized in that: Each unit module is connected to the driver side switch module through line A and line B, wherein the driver side switch module includes Main control unit: controls the switching between three states: line A is grounded and line B is connected to the power supply, line A is connected to the power supply and line B is grounded, and both lines A and B are grounded at the same time. The input ends of line A and line B are connected to the output end of the main control unit; Main detection unit: connected to the main control unit, and detects the current passing through the A and B two-wire loops and receives status feedback from the non-driver side switch module; Each unit module includes a rectifier unit, an energy storage unit, a control unit and a detection unit, wherein: Rectifier unit: converts AC voltage into DC voltage. The output ends of wires A and B are connected to the input ends of the rectifier unit. Energy storage unit: used to store electrical energy, provide power supply for the control unit, and be used for temporary power supply in case of power outage when lines A and B alternate. It is set between the rectifier unit and the control unit, and is connected to the output end of the rectifier unit and the input end of the control unit respectively; Detection unit: detects voltage changes on wires A and B to receive action commands from the driver and transmits the action commands to the control unit. It is connected to wires A and B and the control unit respectively. The control unit, whose output end is connected to the window motor, controls the lifting and lowering movement of the window after receiving the driver's side action command or the non-driver's side switch operation command; When both line A and line B are grounded, the non-driver side switch is not powered and is locked, making it impossible to operate the window switch by itself. When lines A and B switch between the first and second states, the non-driver side switch can be used to raise or lower the window; After the main detection unit recognizes that line A is connected to the power supply and line B is grounded and maintains the set time, the main detection unit will feedback the control unit's readiness status to the main control unit through the current change of the connected load at intervals. The main control unit controls the status of lines A and B according to the corresponding instructions; The control unit enters the ready state, line A outputs PWM, the non-driver side switch starts backlighting, and the window switch on the non-driver side is in the non-operating state.

2. The control method of the automobile window switch system according to claim 1, characterized in that: When lines A and B undergo AC conversion an odd number of times, line A is connected to the power supply and line B is grounded, it means that the switch on the non-driver side can perform the window raising operation; when lines A and B undergo AC conversion an even number of times, line A is grounded and line B is connected to the power supply, it means that the switch on the non-driver side can perform the window lowering operation.

3. The control method of the automobile window switch system according to claim 1 or 2, characterized in that: The set time is 2~4s.

4. The control method of the automobile window switch system according to claim 1 or 2, characterized in that: The interval time is 1 to 3 seconds.

5. The control method of the automobile window switch system according to claim 1 or 2, characterized in that: The current variation range is 40~60mA.

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