CN103967379A

CN103967379A - Vehicle window glass lifting control method

Info

Publication number: CN103967379A
Application number: CN201410195270.2A
Authority: CN
Inventors: 赵保军; 胡啸; 陈飞; 李建才
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2014-05-09
Filing date: 2014-05-09
Publication date: 2014-08-06
Anticipated expiration: 2034-05-09
Also published as: CN103967379B

Abstract

The invention discloses a vehicle window glass lifting control method. According to the vehicle window glass lifting control method, a sampling circuit collects the current magnitude of each vehicle window motor in the movement process, a master control unit (MCU) judges the status of the motors according to the collected current magnitudes and change conditions, and vehicle window glass lifting is started and stopped according to the status of the motors. The vehicle window glass lifting control method has the advantages that a hardware circuit is simple in design and quite low in cost; vehicle window glass lifting is controlled through a control strategy, as a result, the motors can be protected, the motors are protected against long-time overload movement, and it is effectively guaranteed that vehicle window glass has sufficient current to move normally in cold winter.

Description

A kind of control method of lifting glass for vehicle window

Technical field

The application belongs to vehicle electric field, for the control of body electrical function, is specifically related to a kind of control method of lifting glass for vehicle window.

Background technology

The control method of lifting glass for vehicle window mainly contains below 2 kinds at present:

1, the relay of directly controlling glass lifting motor by switch, it is open-minded that switch is pressed relay, practical function; This scheme does not possess function of auto-lift, can not accomplish automatically to cut off output and protection motor and circuit in the situation that of overcurrent simultaneously;

2, control by car body controller or door module, switching signal is passed to the main control chip of car body controller or door module, main control chip receives after instruction, drive glass lifting motor movement, when detecting that the flow currents of motor is greater than its starting current 87%, the numerical value duration is while reaching 400ms, think vehicle window arrival top or bottom and cut off output, the method can realize automatic function and automatically cut off output, but easily cause the excessive and frequent cut-out output of flow currents in cold winter, cause motor to move, glass for vehicle window is the problem of lifting smoothly.

Summary of the invention

In order to address the above problem, the invention discloses a kind of control method of lifting glass for vehicle window, be specially: sample circuit gathers the size of current of each Car window electric machine motion, main control MCU judges according to the size of current and the situation of change that collect motor is in which kind of state, carries out opening of window lifting and stops according to the residing state of motor.

Wherein,

21) when be checked through the electric current of a motor movement be greater than starting current 62.5% time, detect and whether have more than the electric current of 1 vehicle window and is greater than 62.5% of starting current;

22) when determine only have the current of electric of a vehicle window be greater than starting current 62.5% time, detect this current of electric and whether be greater than or equal to 100% of starting current, and duration 400ms;

23) when definite this current of electric is greater than or equal to 100% of starting current, and when duration 400ms, cut off the motion when front window;

24) when determine this current of electric be not more than or equal starting current 100% time, carry out lifting glass for vehicle window motion.

Wherein,

31) when in step 21) in define more than the current of electric of 1 vehicle window be greater than starting current 62.5% time, keep first to enter electric current and enter the vehicle window that is greater than starting current 62.5% state and continue motion, other vehicle windows suspend;

32) detect the Car window electric machine electric current that continues to move and whether be greater than or equal to 100% of starting current, and duration 400ms;

33) when definite current of electric is greater than or equal to 100% of starting current, and when duration 400ms, cut off the motion when front window.

In step 33) after detect and whether still remain valid in the window lifting switch input signal of halted state, when still effectively time, start the lifting action of this vehicle window.

In step 33) after in the time detecting that many window lifting switch input signals in halted state are still remained valid, only start the lifting action of a vehicle window.

Further, the restriction single maximum drive time is 8S.

Hardware circuit design of the present invention is simple, and cost is lower; By control strategy control window lifting, can protect motor, do not allow its long overburden move, effectively ensure that vehicle window has enough electric currents and proper motion in cold winter.

Brief description of the drawings

Fig. 1: current detecting hardware circuit diagram;

Fig. 2: the flow chart of lifting glass for vehicle window.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is specifically described.

As shown in Figure 1, by the little resistance resistance of sampling with high precision series connection access electric motor loop, the voltage on sampling resistor is sent to the AD port of main control chip after amplifying, and then judges the size of current (now the operating current of motor) in loop.

For convenience of explanation, left front vehicle window, right front vehicle window, left back vehicle window, right back vehicle window are defined as respectively to vehicle window A, B, C, D; Be less than 10.6A according to the parameter operating current of vehicle window producer, locked rotor current is less than 24A.

In hardware design, in order to mate wire diameter, A, B are placed under same fuse and (select 30A), B, C are placed under same fuse and (select 30A); The selection principle of fuse is: rated current/0.75, so select the fuse of 30A.

As shown in Figure 2, in the time only having a motor (A motor) in motion, sample circuit gathers the size of current of Car window electric machine motion, when the electric current collecting reach starting current 62.5% time, think and now arrive motor overload state, because starting current can be less than or equal to locked rotor current, and then thresholding is amplified to 100% of starting current, if continue 400ms, think so and enter extreme position, cut off output;

If there are 2 motors (A motor, B motor) to move simultaneously, but stall does not occur simultaneously, one enters stall, a proper motion, current maxima be now locked rotor current and flow currents and, these data can be less than or equal to 39(24+24*62.5%=39), according to the parameter of fuse, the fuse of 30A is in the time of the electric current by 39A, exceed 500ms effective time, under these data, the vehicle window of stall can be again with the numerical value motion 400ms of starting current, if normal condition is cut off output after 400ms; If under the larger condition of resistance, because thresholding is now 100% of starting current, so this motor can move to extreme position;

If 2 motors move simultaneously, there is (C motor in stall simultaneously, D motor), so now electric current is very large, in order to protect mainboard and circuit, first allow the motor that enters at first stall keep moving under the numerical value of starting current 100%, another motor power-off pause motion, first motor movement is (locked rotor current reaches 100% of starting current and continues 400ms) after extreme position, the motor relay suspending above under switch still effective condition can move by automatic pick, ensure that vehicle window can be elevated to extreme position, as being only also the difference of run duration in the case of cold comparison of resistance in winter is large,

If the motors more than being greater than 2 move simultaneously (A motor, B motor, C motor, D motor), as analysis above, if stall occurs, first suspend other motor, more progressively adhesive campaign, under nominal situation, the stall of motor has time delay, the time delay of 4 motors is 2S, actual test, and this time is acceptable; In cold winter, can ensure normally lifting of vehicle window, defect is lifting simultaneously, but consider actual situation, lifting is appreciated that after all the situation generation of 4 door and windows lifting simultaneously is in the winter time less in order one by one, under the operating modes such as some charge stations, the motion conditions of single vehicle window is more, now can ensure the normal lifting of vehicle window.

Claims

1. the control method of a lifting glass for vehicle window, it is characterized in that: sample circuit gathers the size of current of each Car window electric machine motion, main control MCU judges according to the size of current and the situation of change that collect motor is in which kind of state, carries out opening of window lifting and stops according to the residing state of motor.

2. the control method of lifting glass for vehicle window according to claim 1, is characterized in that:

3. the control method of lifting glass for vehicle window according to claim 2, is characterized in that:

4. the control method of lifting glass for vehicle window according to claim 3, is characterized in that:

5. according to the control method of the lifting glass for vehicle window described in claim 3 or 4, it is characterized in that:

6. according to the control method of the lifting glass for vehicle window described in claim 2-5 any one, it is characterized in that: the restriction single maximum drive time is 8S.