Method for controlling the speed of a silicon oil fan of a diesel engine of a mine truck

Abstract

The application discloses a kind of mine truck diesel engine control electric control silicon oil fan rotating speed method, comprising the following steps: S1, with diesel engine speed-vehicle hydraulic temperature, diesel engine speed-hydraulic retarder operating state, diesel engine speed-diesel engine coolant temperature, diesel engine speed-intake temperature, diesel engine speed-oil temperature, diesel engine speed-air conditioning operating state as input condition respectively establishes fan target speed map table;S2, obtains vehicle real-time running information by ECU;S3, according to vehicle real-time running information, obtains the final electric control silicon oil fan target speed value.The application accurately calculates the mine truck diesel engine control electric control silicon oil fan rotating speed method of fan rotating speed demand value by diesel engine speed, vehicle hydraulic temperature and the like information, and different operating condition control optimization is carried out on electric control silicon oil fan target speed according to diesel engine speed identification diesel engine operating condition, improves the precision of fan control, improves the economy and drivability of vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the control of the target speed of the electrically controlled silicon oil fan of the diesel engine for mining vehicles, and in particular to the control of the target speed of the electrically controlled silicon oil fan by the diesel engine speed, the hydraulic oil temperature and the hydraulic retarder. BACKGROUND

[0002] Figure 1 The currently used control method of the target speed of the electrically controlled fan, Figure 1 The existing control scheme of the target speed of the fan does not correlate with the diesel engine speed, and does not control the fan speed according to the hydraulic oil temperature of the whole vehicle and the hydraulic retarder, which has the following disadvantages: (1) in actual use, the hydraulic oil temperature of the whole vehicle and the hydraulic retarder are not used to control the calculation of the target speed of the fan; (2) the calculation of the target speed of the electrically controlled silicon oil fan is not correlated with the diesel engine speed, which leads to inaccurate calculation of the fan speed and the inability to change according to the working conditions.

[0003] The existing patent document CN108518268A proposes a control method and a controller for the electrically controlled silicon oil fan, which has the ability to dynamically correct the control parameters according to the actual speed of the fan, and the use of the controller can improve the service life of the silicon oil fan and reduce the oil consumption of the diesel engine.

[0004] The disclosure of the above background art is only used to assist in understanding the concept and technical solutions of the present application, and does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. SUMMARY

[0005] The present application aims to provide a method for controlling the speed of the electrically controlled silicon oil fan of the diesel engine of a mining vehicle by accurately calculating the required value of the fan speed based on the diesel engine speed, the hydraulic temperature of the whole vehicle, the working state of the hydraulic retarder, the diesel engine coolant temperature, the intake temperature, the oil temperature and the air conditioning working state information, and optimizing the target speed of the electrically controlled silicon oil fan according to the diesel engine speed to identify the operating conditions of the diesel engine, improve the accuracy of fan control and improve the economy and drivability of the whole vehicle.

[0006] To this end, the present application proposes a method for controlling the speed of the electrically controlled silicon oil fan of the diesel engine of a mining vehicle.

[0007] Preferably, the present application can also have the following technical features:

[0008] A method for controlling the speed of the electrically controlled silicon oil fan of the diesel engine of a mining vehicle, comprising the following steps:

[0009] S1, diesel engine speed-vehicle hydraulic temperature, diesel engine speed-hydraulic retarder working state, diesel engine speed-diesel engine coolant temperature, diesel engine speed-intake temperature, diesel engine speed-oil temperature, diesel engine speed-air conditioning working state as input conditions to establish the fan target speed map respectively;

[0010] S2, through the ECU to obtain real-time vehicle running information, the vehicle real-time running information includes diesel engine speed, vehicle hydraulic temperature, hydraulic retarder working state, diesel engine coolant temperature, intake temperature, oil temperature, air conditioning working state information;

[0011] S3, according to the vehicle real-time running information, ECU extracts input condition information value matching to step S1 corresponding fan target speed map to obtain the fan target speed value corresponding to each input condition information value, and then carries out the logic comparison of taking the maximum, obtains the final electric control silicon oil fan target speed value.

[0012] Further, in step S1, the user sets the size of the fan target speed value corresponding to the input condition according to the demand, uploads the established fan target speed map to the ECU, and obtains the real-time input condition information through the ECU. According to the fan target speed map corresponding to the input condition, the fan target speed value can be determined.

[0013] Further, according to the operating condition of the diesel engine, each diesel engine operating condition corresponds to the fan target speed map established by taking diesel engine speed-vehicle hydraulic temperature, diesel engine speed-hydraulic retarder working state, diesel engine speed-diesel engine coolant temperature, diesel engine speed-intake temperature, diesel engine speed-oil temperature, diesel engine speed-air conditioning working state as input conditions.

[0014] Further, the operating condition of the diesel engine includes initial condition, idle condition, driving condition, and gear sliding condition.

[0015] Further, the same input condition has a corresponding fan target speed map in each diesel engine operating condition, and the value of the same input condition in the fan target speed map corresponding to each diesel engine operating condition can be the same or different.

[0016] Further, the logic comparison of taking the maximum means that under this operating condition, the fan target speed value corresponding to each input condition is obtained, and the maximum fan target speed value is taken as the final fan target speed value.

[0017] The beneficial effects of the present application compared with the prior art include: configuring the fan target speed corresponding to the input condition according to different application scenarios to obtain the required fan target speed map; after uploading the map, the ECU can quickly determine the final target speed value of the fan. Taking the diesel engine speed as a necessary condition for controlling the fan target speed, different working condition control optimization is made on the electric control silicon oil fan target speed according to the diesel engine speed to identify the running working condition of the diesel engine, the precision of the fan control is improved, and the economy and drivability of the vehicle are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the control flow chart of the existing electric control fan target speed.

[0019] Figure 2 is the control flow chart of the present application.

[0020] Figure 3 is one of the electric control silicon oil fan target speed maps obtained by the present application taking the coolant temperature-diesel engine speed as the input condition.

[0021] Figure 4 is one of the electric control silicon oil fan target speed maps obtained by the present application taking the intake air temperature-diesel engine speed as the input condition.

[0022] Figure 5 is one of the electric control silicon oil fan target speed maps obtained by the present application taking the engine oil temperature-diesel engine speed as the input condition.

[0023] Figure 6 is one of the electric control silicon oil fan target speed maps obtained by the present application taking the air conditioner gear state-diesel engine speed as the input condition.

[0024] Figure 7 is one of the electric control silicon oil fan target speed maps obtained by the present application taking the vehicle hydraulic oil temperature-diesel engine speed as the input condition.

[0025] Figure 8 is one of the electric control silicon oil fan target speed maps obtained by the present application taking the hydraulic retarder working state-diesel engine speed as the input condition.

[0026] Figure 9 is the flow chart of the present application. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below in conjunction with specific embodiments and by referring to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present application and its applications.

[0028] With reference to the following drawings, non-limiting and non-exclusive embodiments will be described, in which the same reference numerals indicate the same parts, unless otherwise specified.

[0029] As Figures 2 to 9 shown in a method for controlling the speed of a mine truck diesel engine electric control silicon oil fan, comprising the following steps:

[0030] S1, diesel engine speed-vehicle hydraulic temperature, diesel engine speed-hydraulic retarder working state, diesel engine speed-diesel engine coolant temperature, diesel engine speed-intake temperature, diesel engine speed-oil temperature, diesel engine speed-air conditioning working state as input conditions to establish the fan target speed map (MAP) respectively;

[0031] In this step, the user sets the size of the fan target speed value corresponding to the input condition according to the demand, and uploads the established fan target speed map to the ECU. Real-time input condition information can be obtained through the ECU, and the fan target speed value can be determined according to the fan target speed map corresponding to the input condition. Respectively, the diesel engine speed-vehicle hydraulic temperature, the diesel engine speed-hydraulic retarder working state, the diesel engine speed-diesel engine coolant temperature, the diesel engine speed-intake temperature, the diesel engine speed-oil temperature, and the diesel engine speed-air conditioning working state are taken as input conditions to obtain the electric control silicon oil fan target speed. Refer to Figure 3 In the diesel engine speed-diesel engine coolant temperature fan target speed map, the real-time diesel engine speed and diesel engine coolant temperature information can be obtained, and the corresponding fan target speed value can be obtained, for example, the input condition information: diesel engine speed 600 rpm, diesel engine coolant temperature 80℃, the obtained fan target speed is 300 rpm.

[0032] Preferably, the diesel engine speed-vehicle hydraulic temperature, the diesel engine speed-hydraulic retarder working state, the diesel engine speed-diesel engine coolant temperature, the diesel engine speed-intake temperature, the diesel engine speed-oil temperature, and the diesel engine speed-air conditioner working state fan target speed MAPs are respectively established according to the operating conditions of the diesel engine. The operating conditions of the diesel engine include initial condition, idle condition, driving condition, and gear shifting condition. That is, the same input condition has a corresponding fan target speed MAP in each operating condition of the diesel engine, and the fan target speed values of the same input condition in the fan target speed MAPs corresponding to each operating condition of the diesel engine can be the same or different, and the fan target speed values are calibrated according to the user's requirements. For example, the input conditions of the diesel engine speed and the vehicle hydraulic temperature have a fan target speed MAP c in the idle condition and a fan target speed MAP d in the driving condition. Then, the fan target speed MAP c and the fan target speed MAP d can be the same or different. In operation, the electric control silicon oil fan target speed is controlled and optimized in different conditions according to the diesel engine speed to identify the operating conditions of the diesel engine, so as to improve the accuracy of the fan control and the economy and drivability of the vehicle.

[0033] S2, obtaining the real-time vehicle operating information by the ECU, wherein the real-time vehicle operating information includes the diesel engine speed, the vehicle hydraulic temperature, the hydraulic retarder working state, the diesel engine coolant temperature, the intake temperature, the oil temperature, and the air conditioner working state information; the vehicle hydraulic temperature is the vehicle hydraulic oil temperature.

[0034] S3, according to the real-time vehicle operating information, the ECU extracts the input condition information value to match the fan target speed MAP corresponding to step S1 to obtain the fan target speed value corresponding to each input condition information value, and then performs a maximum value comparison to obtain the final electric control silicon oil fan target speed value. The maximum value comparison refers to taking the fan target speed values corresponding to each input condition as the final fan target speed value with the maximum fan target speed value.

[0035] In combination with Figure 2 , the ECU obtains the real-time vehicle operating information, and obtains multiple fan target speeds in the diesel engine speed-vehicle hydraulic temperature, the diesel engine speed-hydraulic retarder working state, the diesel engine speed-diesel engine coolant temperature, the diesel engine speed-intake temperature, the diesel engine speed-oil temperature, and the diesel engine speed-air conditioner working state fan target speed MAPs, and takes the maximum value of the obtained multiple target speeds as the final fan target speed.

[0036] Those skilled in the art will recognize that numerous modifications can be made to the above description, and that the embodiments and drawings are merely illustrative of one or more particular embodiments.

[0037] While there have been described and illustrated what are considered to be exemplary embodiments of the present application, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit of the application. Furthermore, it is also contemplated that many modifications can be made to adapt a particular situation to the teachings of the application without departing from the central concept of the present application. Therefore, it is intended that this application not be limited to the particular embodiments disclosed, but that the application include all embodiments falling within the scope of the application.

Claims

1. A method of controlling the speed of a silicon oil fan electrically controlled by a diesel engine of a mine truck, characterized in that: The method comprises the following steps: S1, diesel engine speed-vehicle hydraulic temperature, diesel engine speed-hydraulic retarder working state, diesel engine speed-diesel engine coolant temperature, diesel engine speed-intake temperature, diesel engine speed-oil temperature, diesel engine speed-air conditioning working state are taken as input conditions to establish fan target speed map respectively; S2, real-time vehicle running information is obtained by ECU, and the real-time vehicle running information includes diesel engine speed, vehicle hydraulic temperature, hydraulic retarder working state, diesel engine coolant temperature, intake temperature, oil temperature, air conditioning working state information; S3, according to the real-time vehicle running information, ECU extracts input condition information value to match the fan target speed map corresponding to step S1 to obtain the fan target speed value corresponding to each input condition information value, and then performs maximum logical comparison to obtain the final electric control silicon oil fan target speed value.

2. A method of controlling the speed of a silicon oil fan electrically by an electronic control for a diesel engine of a mine truck as claimed in claim 1, characterized in that: In step S1, the user sets the size of the fan target speed value corresponding to the input condition according to the demand, uploads the established fan target speed map to ECU, obtains the real-time input condition information through ECU, and determines the fan target speed value according to the fan target speed map corresponding to the input condition.

3. The method for controlling the speed of an electronically controlled silicone oil fan in a mining truck diesel engine as described in claim 1, characterized in that: According to the operation condition of the diesel engine, each diesel engine operation condition corresponds to a fan target speed map established by taking diesel engine speed-vehicle hydraulic temperature, diesel engine speed-hydraulic retarder working state, diesel engine speed-diesel engine coolant temperature, diesel engine speed-intake temperature, diesel engine speed-oil temperature, diesel engine speed-air conditioning working state as input conditions.

4. A method of controlling the speed of a silicon oil fan electrically by an electronic control unit for a diesel engine of a mine truck as claimed in claim 3, characterized in that: The operation condition of the diesel engine includes initial condition, idle speed, driving condition, and gear sliding condition.

5. A method of controlling the speed of a silicon oil fan electrically by an electronic control unit for a diesel engine of a mine truck as claimed in claim 3, characterized in that: The same input condition has a corresponding fan target speed map in each diesel engine operation condition, and the value of the same input condition in the fan target speed value of the fan target speed map corresponding to each diesel engine operation condition can be the same or different.

6. A method of controlling the speed of a silicon oil fan electrically by an electronic control for a diesel engine of a mine truck as claimed in claim 1, characterized by: The maximum logical comparison refers to obtaining the fan target speed value corresponding to each input condition under this operation condition, and taking the maximum fan target speed value as the final fan target speed value.

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