1. The utility model provides an automatically controlled fan controller of diesel engine, includes fan controller and fan, its characterized in that: the fan controller is provided with a plurality of switching value input ends, and different switching value input ends respectively correspond to different operating gears of the fan; the operation gears of the fan comprise a dust removal gear, an idle gear and a plurality of air cooling gears with different strengths.

2. An electrically controlled fan controller for a diesel engine according to claim 1, characterized in that: the fan controller is provided with 4 switching value input ends which respectively correspond to a dust removal gear, an idle gear, an air cooling gear I and an air cooling gear II of the fan.

3. A control method of an electronically controlled fan controller for a diesel engine as set forth in claim 1, characterized in that: the method comprises the following steps:

electrifying a fan controller, and correcting the angle of the fan blade;

the fan controller detects whether a switching value is input; when the input of the switching value is detected, the controller enters a switching value control mode, and the controller switches the driving fan to the gear corresponding to the switching value to run until the new switching value is input or the power is cut off, so that the operation is stopped.

4. The control method of an electronically controlled fan controller for a diesel engine as set forth in claim 3, wherein:

in the step (2), when the fan controller does not detect the input of the switching value and the preset mode parameters correspond to the automatic control mode, the controller enters the automatic control mode, namely the controller controls the fan to automatically switch from the air cooling gear to the dust removal gear according to the preset time interval, and finally returns to the specified air cooling gear for circulating work.

5. The control method of an electronically controlled fan controller for a diesel engine as set forth in claim 3, wherein:

in the step (2), when the fan controller does not detect the input of the switching value and the preset mode parameters correspond to the ECU command control mode, the controller enters the ECU command control mode, the fan controller provides a CAN bus interface, receives the temperatures of the cooling liquid and the engine oil which are periodically issued by the ECU, periodically issues a gear updating command according to temperature control data, and drives the electric control fan to switch to the specified gear for operation.

6. The control method of an electronically controlled fan controller for a diesel engine as set forth in claim 3, wherein:

in the step (2), when the fan controller does not detect the input of the switching value and the preset mode parameters correspond to the temperature control mode, the controller enters the temperature control mode, the fan controller provides a CAN bus interface, receives the temperature data of the cooling liquid and the engine oil sent by the ECU periodically, and automatically drives the electric control fan to switch among the gears according to the preset temperature threshold of the cooling liquid or the engine oil.

7. The control method of an electronically controlled fan of a diesel engine as set forth in claim 3, wherein: the fan controller judges whether the switching value is input or not by detecting the level of the switching value input end.

Background

At present, the electric control diesel engine is widely popularized, but most diesel engines still use a cooling fan with fixed blades and cannot be reversed to remove dust. Because a large number of diesel engines are used in the field of engineering and agricultural machinery, water tanks of the engines are easily blocked by dust, so that the temperature of the engines is overhigh, and the engines are damaged in severe cases; in addition, the air quantity of the fan is only related to the rotating speed of the engine, air quantity regulation and control cannot be carried out according to the actual temperature of the diesel engine, when the air temperature is low or the temperature of the engine is low in the starting stage, the air quantity is still large, the temperature is reduced, the cooling effect is excessive, unnecessary fuel consumption is increased, and the fan is not beneficial to energy conservation and environmental protection.

In recent years, in order to circumvent the disadvantages of the conventional fixed-blade fan, a reversing fan, i.e., a mechanical reversing fan or a hydraulic reversing fan, has been developed and used gradually domestically; the reversing fan needs manual and frequent switching for dedusting and cooling, and the conditions of untimely dedusting and cooling and overhigh temperature of an engine exist; the air quantity can not be automatically regulated according to the actual temperature condition of the diesel engine, and the defect of high energy consumption exists.

The prior art fan control method has the following defects:

(1) the fan control method is single: no matter the fan is mechanically or hydraulically switched, the fan can only be manually switched, and cannot be automatically associated with the temperature of the engine, so that the conditions of untimely dust removal and temperature reduction and overhigh temperature of the engine exist.

(2) The air quantity is controlled singly, and the large air quantity is continuously cooled: the air quantity can not be adjusted in time according to the actual temperature of the diesel engine, and the condition of excessive cooling effect exists. The advantages of an electronically controlled engine are not fully utilized.

(3) The installation and operation are inconvenient: the existing reversing fan is manually controlled, needs an additional mechanical control device, is inconvenient to operate, and has the defects of overlarge volume and inconvenient installation.

Disclosure of Invention

The invention aims to: aiming at solving the problems, the diesel engine electric control fan controller and the control method thereof are provided, which can automatically remove dust or accurately control the air quantity by adopting different fan control schemes aiming at different types of diesel engines, effectively control the temperature of the engine, and have the advantages of safety, energy saving, environmental protection, simple operation and convenient installation.

The technical scheme adopted by the invention is as follows:

an electric control fan controller of a diesel engine comprises a fan controller and a fan, wherein the fan controller is provided with a plurality of switching value input ends, and different switching value input ends respectively correspond to different running gears of the fan; the operation gears of the fan comprise a dust removal gear, an idle gear and a plurality of air cooling gears with different strengths.

Furthermore, the fan controller is provided with 4 switching value input ends which respectively correspond to a dust removal gear, an idle gear, an air cooling gear I and an air cooling gear II of the fan.

The control method of the diesel engine electric control fan controller comprises the following steps:

(1) electrifying a fan controller, and correcting the angle of the fan blade;

(2) the fan controller detects whether a switching value is input; when the input of the switching value is detected, the controller enters a switching value control mode, and the controller switches the driving fan to the gear corresponding to the switching value to run until the new switching value is input or the power is cut off, so that the operation is stopped.

Further, in the step (2), when the fan controller does not detect the input of the switching value and the preset mode parameter corresponds to the automatic control mode (xoc), the controller enters the automatic control mode, that is, the controller controls the fan to automatically switch from the air cooling gear to the dust removal gear according to the preset time interval, and finally returns to the designated air cooling gear, and the fan is circularly operated.

Further, in the step (2), when the fan controller does not detect that the switching value is input and the preset mode parameter corresponds to an ECU command control mode (OXOD), the controller enters the ECU command control mode, the fan controller provides a CAN bus interface, receives the temperatures of the cooling liquid and the engine oil periodically issued by the ECU, periodically issues a gear updating command according to temperature control data, and drives the electrically controlled fan to switch to the specified gear for operation.

Further, in the step (2), when the fan controller does not detect the input of the switching value and the preset mode parameter corresponds to the temperature control mode (OXOE), the controller enters the temperature control mode, the fan controller provides a CAN bus interface, receives the temperature data of the cooling liquid and the engine oil periodically issued by the ECU, and automatically drives the electrically controlled fan to switch between the gears according to the preset temperature threshold of the cooling liquid or the engine oil.

Further, the fan controller judges whether the switching value is input or not by detecting the level of the switching value input end.

Aiming at the traditional mechanical oil pump diesel engine, a switching value control mode can be selected, and a fan is driven to remove dust or cool by air cooling through switching of the switching value; or an automatic control mode can be selected, and the dust removal or the air cooling can be periodically and circularly performed.

Aiming at the electric control diesel engine, a temperature control mode CAN be selected, and an ECU of the electric control diesel engine CAN periodically send messages containing the temperature of cooling liquid and the temperature of engine oil through a CAN bus; the fan controller periodically receives the temperature data, controls the fan to remove dust and cool according to a preset temperature threshold value, and regulates the air volume. Or an ECU instruction control mode can be selected, the ECU periodically issues instructions according to the temperature value of the cooling liquid or the engine oil, the fan controller receives the message, drives the fan to operate at a specified target gear, and periodically reports the current gear and the alarm information to the ECU.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

the method can be used for automatically removing dust or accurately controlling the air quantity according to the temperature of the diesel engine by adopting different fan control schemes aiming at different types of diesel engines, can effectively control the temperature of the engine, and is safe, energy-saving, environment-friendly, simple to operate and convenient to install.

Drawings

FIG. 1 is a general flow chart of the control method of the present invention;

FIG. 2 is a flow chart of the on-off control mode of the control method of the present invention;

FIG. 3 is a flow chart of an automatic control mode of the control method of the present invention;

FIG. 4 is a flowchart of an ECU commanded control pattern of the control method of the present invention;

fig. 5 is a flow chart of a temperature control mode of the control method of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

An electric control fan controller of a diesel engine comprises a fan controller and a fan, wherein the fan controller is provided with 4 switching value input ends which respectively correspond to a dust removal gear, an idle gear, an air cooling gear I and an air cooling gear II of the fan; the fan controller controls the switching of the fan gears by detecting the input of the switching value, and actually controls the angle change of the fan blades;

table 1 shows the names and numbers of the respective gears of the fans and the corresponding blade angles;

gear number	0x0C	0x0A	0x01	0x02
					Switch quantity numbering	1	2	3	4
Blade angle	-30°	0°	22.5°	45°
					Gear function	Dust removal	Free running	Air cooling 1	Air cooling 2

As shown in fig. 1, the overall flow chart of the control method of the present invention: the fan controller first detects whether there is a switching value input (level 0), and if there is a switching value input, the controller will operate in the switching value control mode. If the switch is not switched on, and the switching value input does not exist, the controller operates in other preset control modes: the control method comprises an automatic control mode, an ECU instruction control mode and a temperature control mode.

As shown in fig. 2, the flow chart of the switching value control mode of the control method of the present invention: when the level of the switching value 1 (0C gear) is 0, the controller enters an automatic control mode (OXOC), namely, the controller automatically switches from an air cooling gear to a dust removal gear at time intervals and finally returns to a designated air cooling gear. The air cooling time, the dust removal time and the regression target gear can be preset (default: 10 seconds for dust removal, 5 minutes for air cooling and 2 for air cooling of the regression target gear);

when the level of the other switching value input terminal 2/3/4 is 0, the controller controls the fan to switch to the operation of the gear corresponding to the switching value until a new switching value is input.

As shown in fig. 3, the flow chart of the automatic control mode of the control method of the present invention: when the level of the switching value 1 (dust removal gear position) is 0, or when no switching value is input and the preset control mode is the automatic control mode (OXOC), the fan controller enters the automatic control mode to operate. The fan controller cyclically polls for timer overflow: when the air cooling duration time is equal to the preset air cooling time, switching to a dust removal gear for dust removal; when the dust removal duration is equal to the preset dust removal time, the fan is switched to the air cooling gear to operate, and the air cooling gear can be preset to the air cooling gear 1 or the air cooling gear 2.

As shown in fig. 4, the ECU command control mode flowchart of the control method of the present invention: the fan controller does not detect the input of switching values (all the switching value levels are 1), and the controller operates according to a preset ECU instruction control mode (OXOD); the controller provides a CAN bus interface, and the ECU communicates with the controller according to the CAN bus extended frame message format. The controller receives the temperatures of the cooling liquid and the engine oil which are periodically issued by the ECU, determines whether to remove dust or lower the temperature, periodically issues an instruction message, and the fan controller analyzes a target gear of the message and switches to the target gear to operate. The fan controller periodically reports the current gear and the warning information message. The dust removal time represents the maximum time that the fan lasts at the dust removal gear; the air-cooling time represents a minimum time for which the fan lasts at the corresponding cooling gear.

The ECU periodically (500ms-1000ms) issues an instruction message format:

message ID	DLC data length	Control mode	Target gear	Dust removal time (seconds)	Air cooling time (minutes)
						18AAAE00	04	0D	0C/0B/0A/01/02	10	15

The fan controller reports the message format periodically (500ms-1000 ms):

message ID	DLC data length	Control mode	Current gear	Warning character
					18AAAECA	03	0D	0C/0B/0A/01/02	00

As shown in fig. 5, the temperature control mode flow chart of the control method of the present invention: the fan controller does not detect the input of the switching value (all the switching value levels are 1), and the controller operates according to a preset temperature control mode (OXOE); the controller provides a CAN bus interface and periodically receives temperature data messages sent by an ECU CAN bus. The fan controller analyzes the temperature of the cooling liquid and the temperature of the engine oil, the temperature of the cooling liquid is greater than 80 ℃ or the temperature of the engine oil is greater than 120 ℃, an electric control fan is driven to remove dust, and the duration time is equal to the preset dust removal time; and then returns to the target air-cooled gear. The duration time of the air cooling gear is not less than the preset air cooling time.

Temperature message format issued by ECU periodically (500ms-1000 ms):

message ID	DLC data length	Temperature of cooling liquid	NC	Engine oil temperature (Low byte)	Engine oil temperature (high byte)
						18FFFE00	XX	0D	NC	10	15

Therefore, the control method can be suitable for various diesel engines, including electrically controlled diesel engines, traditional mechanical oil pump engines and the like, and is wide in coverage and good in universality.

In conclusion, the method accurately controls the dust removal and cooling of the electric control fan, accurately controls the temperature of the engine, and is energy-saving and environment-friendly. Small volume, simple operation and convenient installation.