Air compressor control method and system

Abstract

The application discloses an air compressor control method and system. The air compressor control method and system can realize negative pressure detection, humidity detection and timing and counting functions through a turbocharger device newly added in the system. The negative pressure detection can use a sensor to improve the air intake quality of the air compressor according to the altitude, the set requirement, the opening or the speed-up of the turbocharger, or start the air charging time detection function through the detection of the load rate of the air compressor to check and alarm vehicle faults, so that the load of the air compressor is reduced to the maximum and the service life of the air compressor is prolonged.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of automobile technology, in particular to a control method and system for an air compressor. BACKGROUND

[0002] Vehicle-mounted air compressors and industrial air compressors are widely used in harsh rainforest areas, desert areas, plateau areas, etc. If a normal air compressor is used in a low-altitude area, it will inevitably encounter some difficulties in a high-altitude area, especially when the negative pressure is too high, the air intake is difficult, the power consumption is increased, etc., which can easily cause damage to the air compressor. Therefore, new energy vehicles and industrial machines do not have such devices, and most industrial air compressors and vehicles do not have a turbocharger system. Therefore, a universal method and system for controlling an air compressor are needed. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provides a control method and system for an air compressor. The control method and system are used to control the air compressor to adapt to different environments.

[0004] According to the first aspect of the specification, a control method for an air compressor is provided. The method comprises the following steps:

[0005] Step 1: The ECU monitors the negative pressure value of the air compressor and feeds back the negative pressure value to control the electric variable turbocharger.

[0006] When the air compressor is in a non-plateau area, if the detected negative pressure value C of the air compressor during operation is less than or equal to the allowable working negative pressure value Y of the air compressor, an alarm is given to clean or replace the air filter.

[0007] When the air compressor is in a plateau area, if the detected negative pressure value C of the air compressor during operation is less than or equal to the allowable working negative pressure value Y of the air compressor, the electric variable turbocharger is started and accelerated until the negative pressure value C of the air compressor during operation is greater than or equal to the allowable working negative pressure value Y of the air compressor. At this time, the speed of the electric variable turbocharger is maintained and recorded as speed U. When the detected negative pressure F of the air compressor during non-pumping is less than the negative pressure value before the electric variable turbocharger is boosted, the electric variable turbocharger is operated at speed U to achieve the purpose of normal operation of the air compressor. When the air compressor and the booster are working, if the detected negative pressure value F is less than the allowable working negative pressure value Y of the air compressor, an alarm is given to clean the air filter.

[0008] Step 2: The ECU monitors the humidity of the air compressor with an internal humidity sensor. When the humidity G is greater than or equal to the humidity threshold value Z, it is determined that the air compressor may be waterlogged, and an alarm is given or the dryer drying cylinder is prompted to be replaced.

[0009] Step 3: The load rate H of the air compressor is monitored. When the load rate H is greater than or equal to the set load threshold value N, the electric variable turbocharger is started.

[0010] Step 4: After the vehicle starts, the ECU detects the pumping interval and the air compressor working time, which is used to capture the duration of negative pressure change. If the pumping interval time D ≤ the normal interval time A reaches the preset threshold, the electric variable turbocharger is started, and the pumping interval time D1 and the turbocharger speed V at this time are memorized. Whenever the pumping interval time D = D1, the electric variable turbocharger works at speed V. If the interval time D ≥ the normal interval time A, it works normally without the assistance of the electric variable turbocharger. The electric variable turbocharger is stopped;

[0011] If the single pumping time E ≥ the normal pumping time K, the electric variable turbocharger is started to shorten the pumping time. The ECU memorizes the pumping interval time E1 and the turbocharger speed W at this time. Whenever the pumping interval time E = E1, the electric variable turbocharger works at speed W. If the single pumping time E ≥ the pumping time fault threshold B after starting the electric variable turbocharger, it is determined that the vehicle may have a fault, and an alarm is given for maintenance.

[0012] Further, the air compressor load rate N = (air compressor pumping time / vehicle running time) * 100%.

[0013] Further, when in non-highland areas, the negative pressure value F of the air compressor when not pumping is greater than or equal to the normal negative pressure value X. When in highland areas, the negative pressure value F of the air compressor when not pumping is less than or equal to the normal negative pressure value X.

[0014] According to the second aspect of the specification, an air compressor control system is also provided, which includes an air filter, an ECU, a vehicle controller, an instrument panel, an electric variable turbocharger and an air compressor. The vehicle controller is connected with the ECU, the instrument panel and the electric variable turbocharger, which is used to transmit instructions and detect the running state of the adjustment device. The electric variable turbocharger is also connected with the air compressor, and is connected with the ECU and the air filter.

[0015] The ECU is used to monitor the negative pressure value of the air compressor and feedback the negative pressure value to the electric variable turbocharger. When in non-highland areas, the negative pressure value F of the air compressor when not pumping is greater than or equal to the normal negative pressure value X. If the negative pressure value C of the air compressor when working is less than or equal to the allowable working negative pressure value Y of the air compressor, it needs to be alarmed and cleaned or replaced.

[0016] When the air compressor is in a highland area, the negative pressure value F of the air compressor when not pumping is less than or equal to the conventional negative pressure value X; if the negative pressure value C of the air compressor when working is less than or equal to the allowable working negative pressure value Y of the air compressor, the electric variable speed turbocharger is started and accelerated until the negative pressure value C of the air compressor when working is greater than or equal to the allowable working negative pressure value Y of the air compressor, the speed of the electric variable speed turbocharger at this time is maintained and recorded as the speed U, and when the negative pressure F of the air compressor when not pumping is the negative pressure value before the electric variable speed turbocharger is pressurized, the electric variable speed turbocharger is given the speed U to achieve the purpose of normal working of the air compressor; when the air compressor and the turbocharger are working, if the negative pressure value F is less than the allowable working negative pressure value Y of the air compressor, an alarm or cleaning of the air filter is needed;

[0017] The ECU also monitors the humidity of the air compressor through an internal humidity sensor, and when the humidity G is greater than or equal to the humidity threshold value Z, it is determined that the air compressor may be waterlogged, and the instrument panel gives an alarm or prompts to replace the dryer drying cylinder; the ECU is used to monitor the load rate H of the air compressor; when the load rate H is greater than or equal to the set load threshold value N, the electric variable speed turbocharger is started;

[0018] The ECU is also used to detect the pumping time interval after the vehicle is started, and the working time of the air compressor, to capture the duration of the negative pressure change; if the pumping interval time D is less than or equal to the normal interval time A for a number of times reaching a preset threshold value, the electric variable speed turbocharger is started, and the pumping interval time D1 at this time and the turbocharger speed V at this time are recorded; every time the pumping interval time D is equal to D1, the electric variable speed turbocharger works at the speed V; if the interval time D is greater than or equal to the normal interval time A, normal working is needed without the assistance of the electric variable speed turbocharger, and a stop command is given to the electric variable speed turbocharger; if the single pumping time E is greater than or equal to the normal pumping time K, the electric variable speed turbocharger is started to shorten the pumping time, and the ECU records the pumping interval time E1 at this time and the turbocharger speed W at this time; every time the pumping interval time E is equal to E1, the electric variable speed turbocharger works at the speed W; if after the electric variable speed turbocharger is started, the single pumping time E is greater than or equal to the pumping time fault threshold value B, it is determined that the vehicle may have a fault, and an alarm is given for maintenance.

[0019] The air compressor is connected with a turbocharger type device, a sensor is used to improve the air quality of the air compressor according to the set requirements, or an alarm is given, the load of the air compressor is maximally reduced, the service life of the air compressor is prolonged, and the air compressor can work in a rainforest area, a desert area and a highland area with a bad environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the air compressor control system;

[0021] Figure 2 The flow chart of negative pressure detection in the air compressor control method;

[0022] Figure 3 The humidity detection flow chart in the air compressor control method;

[0023] Figure 4 The interval determination flow chart in the air compressor control method;

[0024] Figure 5 The single air charging time determination flow chart in the air compressor control method. DETAILED DESCRIPTION

[0025] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0027] The present application provides an air compressor control method; the steps are as follows:

[0028] Negative pressure detection: as shown, the ECU monitors the negative pressure value, and the negative pressure value is fed back to the electric variable turbocharger; Figure 2

[0029] When in non-highland areas, the negative pressure value F of the air compressor when not charging is greater than or equal to the conventional negative pressure value X; if the negative pressure value C of the air compressor when working is less than or equal to the air compressor allowable working negative pressure value Y, the ECU needs to be alarmed and the instrument panel needs to be prompted to clean or replace the air filter; if the negative pressure value C of the air compressor when working is greater than or equal to the air compressor allowable working negative pressure value Y, the air compressor works normally;

[0030] When in highland areas, the negative pressure value F of the air compressor when not charging is less than or equal to the conventional negative pressure value X; if the negative pressure value C of the air compressor when working is less than or equal to the air compressor allowable working negative pressure value Y, the electric variable turbocharger is started through the ECU and the vehicle controller and accelerated, when the negative pressure value C is greater than or equal to the air compressor allowable working negative pressure value Y, the speed at this time is maintained, the ECU memorizes the negative pressure value at this time, the vehicle controller memorizes the electric variable turbocharger speed, when the negative pressure F of the air compressor when not charging is the negative pressure value before the electric variable turbocharger is boosted, the electric variable turbocharger works at the memorized speed to achieve the purpose of normal working of the air compressor; if the negative pressure value C of the air compressor under the condition of the pneumatic booster is less than or equal to the air compressor allowable working negative pressure value Y, the ECU is alarmed, and the instrument panel is controlled through the vehicle controller to prompt cleaning or replacement of the air filter;

[0031] ​In one embodiment, the negative pressure value when not pumping is F=50KPa (normal atmospheric pressure is 100KPa), at this time the air compressor works, the working negative pressure value F=-54KPa is measured, the working negative pressure value of the air compressor is set to be greater than or equal to -3KPa under normal atmospheric pressure, at this time the turbocharger is started, assuming that the speed is increased to 1000r / min, F=-3KPa is measured, at this time the air compressor intake requirement is met, and the non-working negative pressure value F=50KPa is recorded, when this pressure value is detected subsequently, the turbocharger is directly started and the speed is adjusted to 1000r / min. If this speed is maintained, when the air compressor works and the negative pressure value F is less than -3KPa, an alarm or cleaning of the air filter is required;

[0032] As shown in Figure 3 , the ECU internal humidity sensor monitors humidity, when humidity G is greater than or equal to humidity threshold Z, it is determined that the product may be waterlogged, an alarm is given through the ECU and the instrument panel is controlled through the vehicle controller to prompt replacement of the dryer drying cylinder;

[0033] The air compressor load rate H is monitored; when the load rate H is greater than or equal to the set load threshold N, the electric variable turbocharger is started; the air compressor load rate N=(air compressor pumping time / vehicle running time)*100%;

[0034] As shown in Figure 4 , after the vehicle is started, the ECU detects the pumping interval and the air compressor working time, which is used to capture the duration of the negative pressure change, if the pumping interval time D is less than or equal to the normal interval time A for a number of times that reaches a preset threshold, the electric variable turbocharger is started, the ECU memorizes the pumping interval time D1 at this time and the turbocharger speed V at this time, and every time the pumping interval time D=D1, the electric variable turbocharger is started and works at the speed V;

[0035] As shown in Figure 5 , if the interval time D is greater than or equal to the normal interval time A, it works normally without the need for electric variable turbocharger assistance, and a stop command is given to the electric variable turbocharger; if the single pumping time E is greater than or equal to the normal pumping time K, the electric variable turbocharger is started to shorten the pumping time and cope with special road conditions, the ECU memorizes the pumping interval time E1 at this time and the turbocharger speed W at this time, and every time the pumping interval time E=E1, the electric variable turbocharger is started and works at the speed W; if the single pumping time E is greater than or equal to the pumping time fault threshold B after the electric variable turbocharger is started, it is determined that the vehicle may have a fault, and an alarm is given for maintenance.

[0036] In one embodiment, generally the load rate N is generally set to 25%, according to the detected time ECU automatically calculates the load rate, if the vehicle continues load rate is greater than or equal to 25% or more, the need to start the electric variable speed turbocharger to shorten the single pumping time, facilitate the reduction of load rate; according to 1 hour calculation, the single operation time of the air compressor is K generally required to be less than or equal to 2 minutes, so the single pumping time interval D is less than or equal to the set value A of 8 minutes, if the continuous 5 single pumping time interval is less than or equal to 8 minutes, the electric variable speed turbocharger can be started, one of which is greater than 8 minutes, then clean and re-count;

[0037] If the single pumping time E exceeds the set value K2 minutes, the electric variable speed turbocharger needs to be started, but if the single pumping time E exceeds the set value B, B is generally set to 10-15 minutes, then the vehicle pipeline may be faulty, or the air compressor fails, at this time the ECU needs to feed back the signal to the vehicle instrument panel to prompt the driver, buzzer alarm or instrument panel text alarm.

[0038] As shown in Figure 1 The embodiment of the present application provides an air compressor control system, which comprises an air filter, an ECU, a vehicle controller, an instrument panel, an electric variable speed turbocharger and an air compressor; the vehicle controller is connected with the ECU, the instrument panel and the electric variable speed turbocharger, and is used for transmitting instructions and detecting the running state of the adjustment device; the electric variable speed turbocharger is further connected with the air compressor, and is interconnected with the ECU and connected to the air filter.

[0039] The above embodiment is used to explain and illustrate the present application, but not to limit the present application, any modification and change made to the present application within the spirit and protection scope of the claims of the present application, falls into the protection scope of the present application.

Claims

1. An air compressor control method characterized by, The method steps are as follows: Step 1: The ECU monitors the negative pressure value of the air compressor and feeds back the negative pressure value to the electric variable speed turbocharger; When in non-highland areas, if the detected negative pressure value C of the air compressor during operation is less than or equal to the allowable negative pressure value Y of the air compressor, an alarm is needed to clean or replace the air filter; When in highland areas, if the detected negative pressure value C of the air compressor during operation is less than or equal to the allowable negative pressure value Y of the air compressor, the electric variable speed turbocharger is started and accelerated until the negative pressure value C of the air compressor during operation is greater than or equal to the allowable negative pressure value Y of the air compressor, at which time the speed of the electric variable speed turbocharger is maintained and recorded as speed U, and when the detected negative pressure F of the air compressor during non-pumping is the negative pressure value before the electric variable speed turbocharger is boosted, the electric variable speed turbocharger is operated at speed U to achieve the purpose of normal operation of the air compressor; when the air compressor and the booster are operating, if the detected negative pressure value F is less than the allowable negative pressure value Y of the air compressor, an alarm or cleaning of the air filter is needed; Step 2: The ECU internal humidity sensor monitors the humidity of the air compressor, and when the humidity G is greater than or equal to the humidity threshold Z, it is determined that the air compressor may be waterlogged, and an alarm or replacement of the dryer drying cylinder is prompted; Step 3: The load rate H of the air compressor is monitored; when the load rate H is greater than or equal to the set load threshold N, the electric variable speed turbocharger is started; Step 4: After the vehicle is started, the ECU detects the pumping time interval and the air compressor operation time to capture the duration of the negative pressure change, and if the pumping interval time D is less than or equal to the normal interval time A for a number of times that reaches a preset threshold, the electric variable speed turbocharger is started, the pumping interval time D1 at this time and the booster speed V at this time are recorded, and every time the pumping interval time D = D1, the electric variable speed turbocharger operates at speed V; if the interval time D is greater than or equal to the normal interval time A, normal operation is needed without the assistance of the electric variable speed turbocharger, and a stop command is given to the electric variable speed turbocharger; If the single pumping time E is greater than or equal to the normal pumping time K, the electric variable speed turbocharger is started to shorten the pumping time, the ECU records the pumping interval time E1 at this time and the booster speed W at this time, and every time the pumping interval time E = E1, the electric variable speed turbocharger operates at speed W; if after the electric variable speed turbocharger is started, the single pumping time E is greater than or equal to the pumping time fault threshold B, it is determined that the vehicle may have a fault, and an alarm is given for maintenance.

2. The air compressor control method of claim 1, wherein The air compressor load rate N = (air compressor pumping time / vehicle running time) * 100%.

3. The air compressor control method of claim 1, wherein When in non-highland areas, the negative pressure value F of the air compressor during non-pumping is greater than or equal to the normal negative pressure value X; when in highland areas, the negative pressure value F of the air compressor during non-pumping is less than or equal to the normal negative pressure value X.

4. An air compressor control system, characterized by, The system includes an air filter, an ECU, a vehicle controller, an instrument panel, an electric variable speed turbocharger, and an air compressor; the vehicle controller is connected with the ECU, the instrument panel, and the electric variable speed turbocharger for transmitting instructions and detecting the operating state of the adjustment device, the electric variable speed turbocharger is further connected with the air compressor, and is interconnected with the ECU and connected to the air filter; The ECU is used for monitoring the negative pressure value of the air compressor and feeding back the negative pressure value to make the electric variable speed turbocharger; when in non-plateau area, the negative pressure value F of the air compressor when not pumping is greater than or equal to the conventional negative pressure value X; if the negative pressure value C of the air compressor when working is less than or equal to the allowable working negative pressure value Y of the air compressor, an alarm is needed to clean or replace the air filter; When in plateau area, the negative pressure value F of the air compressor when not pumping is less than or equal to the conventional negative pressure value X; if the negative pressure value C of the air compressor when working is less than or equal to the allowable working negative pressure value Y of the air compressor, the electric variable speed turbocharger is started and accelerated until the negative pressure value C of the air compressor when working is greater than or equal to the allowable working negative pressure value Y of the air compressor, the speed of the electric variable speed turbocharger at this time is maintained and recorded as speed U, and when the negative pressure F of the air compressor when not pumping is the negative pressure value before the electric variable speed turbocharger is boosted, the electric variable speed turbocharger is worked at speed U to achieve the purpose of normal working of the air compressor; when the air compressor and the booster work, if the negative pressure value F is less than the allowable working negative pressure value Y of the air compressor, an alarm is needed to clean the air filter; The ECU is also used for monitoring the humidity of the air compressor through an internal humidity sensor, and when the humidity G is greater than or equal to the humidity threshold value Z, it is determined that the air compressor may be waterlogged, the instrument panel gives an alarm or prompts to replace the drying cylinder of the dryer; the ECU is used for monitoring the load rate H of the air compressor; when the load rate H is greater than or equal to the set load threshold value N, the electric variable speed turbocharger is started; The ECU is also used for detecting the pumping interval and the working time of the air compressor after the vehicle is started, and is used for capturing the duration of the negative pressure change; if the pumping interval time D is less than or equal to the normal interval time A for a number of times reaching a preset threshold value, the electric variable speed turbocharger is started, the pumping interval time D1 at this time and the speed V of the booster at this time are recorded, and the electric variable speed turbocharger works at speed V every time the pumping interval time D is equal to D1; if the interval time D is greater than or equal to the normal interval time A, the electric variable speed turbocharger is stopped; if the single pumping time E is greater than or equal to the normal pumping time K, the electric variable speed turbocharger is started to shorten the pumping time, the ECU records the pumping interval time E1 at this time and the speed W of the booster at this time, and the electric variable speed turbocharger works at speed W every time the pumping interval time E is equal to E1; if the single pumping time E is greater than or equal to the pumping time fault threshold value B after the electric variable speed turbocharger is started, it is determined that the vehicle may have a fault, and an alarm is given for maintenance.

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