A control method for an automobile air conditioner damper actuator

Abstract

The invention provides a control method of an air door actuator of an automobile air conditioner, and belongs to the technical field of automobiles. The control method of the air door actuator of theautomobile air conditioner solves the problem that the operation angle adjustment of an air damper actuator is not accurate enough in the prior art. The control method of the air door actuator of theautomobile air conditioner comprises the steps that an actuator target position Ptg is set, an actuator current actual position Pfb is collected, a difference triangle S between the actuator target position Ptg and the actuator current actual position Pfb is obtained, the difference triangle S is compared with a preset value Sdt, and a full-speed region operation stage is entered when the triangleS is greater than or equal to the preset value Sdt to control the air door actuator to perform a hundred percent PWM operation; and a deceleration region operation stage is entered when the difference triangle S is less than the preset value Sdt to control the air door actuator to perform PWM operation with a preset percentage after decreasing in sequence. According to the control method of the air door actuator of the automobile air conditioner, the air door actuator can reach a preset target position quickly and accurately.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a method for controlling an actuator of an automobile air conditioner damper. Background technique [0002] The quality of the control of the damper motor actuator of the automobile air conditioner directly affects the air intake of the internal and external circulation, the deviation of the air outlet position of the mode, and the temperature deviation of the mixing area, which in turn affects the comfort of passengers. Currently on the market, there are mainly the following deficiencies in the control of the damper motor: 1. The control of the damper actuator is not in place. When the damper is at the critical point, there will be air leakage. For example, the mode damper actuator moves from the blowing head to the blowing foot. There may still be air leakage at the blowing head due to insufficient execution at the position, or there may be air leakage at the blowing foot whe...

AI Technical Summary

Problems solved by technology

Currently on the market, there are mainly the following deficiencies in the control of the damper motor: 1. The control of the damper actuator is not in place. When the damper is at the critical point, there will be air leakage. For example, the mode damper actuator moves from the blowing head to the blowing foot. There may still be air leakage at the blowing head due to insufficient execution at the position, or there may be air leakage at the blowing foot when the mode damper actuator moves from the blowing foot to the blowing head position due to insufficient execution

2. The damper actuator controls the execution overshoot. For example, the circulation damper actuator moves from the full inner circulation to the full outer circulation or switches from the full outer circulation to the full inner circulation, because the overshoot is easy to deform the shaft and accelerate the aging speed. Shaft will break

3. The damper actuator is controlled to swing back and forth near the target position. For example, the swinging of the mixing damper makes the temperature in the mixing area fluctuate abnormally, causing the temperature of the blown wind to be unstable

4. There is no effective fault discrimination mechanism. If it is not possible to clearly determine whether the actuator exceeds the stroke, nor can it clearly determine whether it is a stalled fault, there is a serious misjudgment

5. Poor adaptability, repeated calibration and calibration work is required for different air-conditioning systems, which wastes a lot of time, and the effect may not be good

[0003] In view of the above-mentioned problems, the existing Chinese patent literature discloses a portable automotive air-conditioning damper actuator controller [application number: CN201710221203.7], which includes: a microprocessor, a power supply connected to the microprocessor module, an operation panel module connected to the microprocessor, and a damper actuator motor drive module connected to the microprocessor; although the invention includes a feedback function, the operating position of the damper can be precisely controlled by displaying the feedback voltage; The damper drive can realize two modes of "fine adjustment" and "coarse adjustment", which can fully satisfy any position that the damper needs to reach; High and the control is not convenient enough, and it needs to increase the equipment to realize it, which increases the cost output