Method for equivalent calculation of energy consumption of silicone oil fan

Abstract

The present invention relates to a method for equivalently calculating the energy consumption of a silicone oil fan. The method comprises the following steps: calibrating a test environment of a silicone oil fan bench, testing different speed torques of the silicone oil fan under the calibrated test environment, calculating the power of the silicone oil fan, fitting the calculated fan power to a speed-power curve, and obtaining a fitting formula. The energy consumption of the silicone oil fan at different time periods is calculated according to the fitting formula, and finally summing up the energy consumption of the silicone oil fan at different time periods to obtain the total energy consumption during the entire test process. The present invention can quickly, efficiently, and accurately calculate the energy consumption of the silicone oil fan, making it easy to analyze the fuel-saving performance of the silicone oil fan during use of a vehicle. In addition, the use environment of the silicone oil fan can be optimized to further improve the fuel-saving performance of the silicone oil fan.

Description

Technical Field

[0001] The invention relates to an engine cooling system, and in particular to a method for equivalently calculating the energy consumption of a silicone oil fan. Background Art

[0002] As a crucial component of the vehicle engine cooling system, automotive silicone oil fans primarily replace direct-connect fans to reduce vehicle energy consumption. However, accurate energy consumption is difficult to obtain due to the inability to test the shaft power of silicone oil fans within a complete vehicle environment.

[0003] The existing technology involves installing a direct-connect fan and a silicone oil fan on two identical vehicles, testing their fuel consumption simultaneously on the same road, and then subtracting the fuel consumption of the two vehicles to obtain the fuel-saving performance of the silicone oil fan. However, due to the different driving habits of the drivers of the two vehicles, the obtained data is inaccurate. In addition, this fuel consumption testing method is costly and time-consuming, making it unsuitable for widespread use. Summary of the Invention

[0004] To solve the above problems, the present invention provides a method for equivalently calculating the energy consumption of a silicone oil fan, which can quickly, efficiently and accurately calculate the energy consumption of the silicone oil fan, making it easier to analyze the fuel-saving performance of the silicone oil fan during vehicle use. In addition, the use environment of the silicone oil fan can be optimized to further improve the fuel-saving performance of the silicone oil fan.

[0005] The technical solution adopted by the present invention is: a method for equivalently calculating the energy consumption of a silicone oil fan of the present invention comprises the following steps:

[0006] A) Silicone oil fan test bench calibration: Establish the connection between the silicone oil fan test bench and the vehicle test environment through the slip characteristics of the silicone oil fan. The specific operation method is as follows:

[0007] First, the characteristic parameter slip of the silicone oil fan is tested on the whole vehicle. The engine speed is the power point speed, and the silicone oil fan control signal is the full engagement signal. After the silicone oil fan speed stabilizes, the silicone oil fan speed is recorded, and its slip rate is calculated according to the following formula.

[0008]

[0009] n i =n e *b

[0010] n e : Engine power point speed

[0011] n f : Silicone oil fan speed

[0012] n i : Silicone oil fan input speed

[0013] b: Silicone oil fan pulley speed ratio

[0014] Then the silicone oil fan is installed on the silicone oil fan test bench, and the input speed is n i Adjust the back pressure regulation system of the silicone oil fan test bench and the temperature of the silicone oil clutch front air outlet to ensure that the silicone oil fan slip rate is consistent with that of the vehicle;

[0015] B) Test the different speed torques of the silicone oil fan under the above test environment, and then calculate the fan power according to the following formula:

[0016]

[0017] P: Silicone oil fan power

[0018] T: Silicone oil fan torque

[0019] C) Fit the fan power calculated at different speeds to the speed-power curve and obtain the fitting formula, see the attached Figure 1 .

[0020] D) Install this type of fan on the vehicle and conduct a road test or a hub test to test the silicone oil fan speed n and record the sampling frequency f.

[0021] E) Calculating the silicone oil fan power using the silicone oil fan speed obtained from the road test or the hub test using the fitting formula in step C;

[0022] P i =a*n 3

[0023] a: fitting coefficient

[0024] P i :The power of the silicone oil fan at different times during the test

[0025] F) Calculate the energy consumption of the silicone oil fan at different times according to the following formula

[0026]

[0027] Wi: Energy consumption of silicone oil fan at different time periods

[0028] f: Sampling frequency during the test

[0029] G) Calculate the total energy consumption of the silicone oil fan during the entire road test or hub test according to the following formula:

[0030] W=∑W i

[0031] W: Total energy consumption during the test.

[0032] The beneficial effects achieved by the present invention are as follows: by calibrating the test environment of the silicone oil fan bench, testing the different speed torques of the silicone oil fan under the calibrated test environment, calculating the power of the silicone oil fan, then fitting the calculated fan power to a speed-power curve and obtaining a fitting formula, calculating the energy consumption of the silicone oil fan at different time periods according to the fitting formula, and finally accumulating the energy consumption of the silicone oil fan at different time periods to obtain the total energy consumption during the entire test process. The present invention can quickly, efficiently, and accurately measure the energy consumption of the silicone oil fan, facilitating the analysis of the fuel-saving performance of the silicone oil fan during vehicle use. In addition, the use environment of the silicone oil fan can be optimized to further improve the fuel-saving performance of the silicone oil fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The power-speed engagement curve of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 As shown, a method for equivalently calculating the energy consumption of a silicone oil fan of the present invention comprises the following steps:

[0036] A) Silicone oil fan test bench calibration: Establish the connection between the silicone oil fan test bench and the vehicle test environment through the slip characteristics of the silicone oil fan. The specific operation method is as follows:

[0037] First, test the characteristic parameter slip of the silicone oil fan on a complete vehicle. The engine speed is set to the power point, and the silicone oil fan control signal is set to the fully engaged signal. After the silicone oil fan speed stabilizes, record the silicone oil fan speed and calculate its slip rate using the following formula.

[0038]

[0039] n i =n e *b

[0040] n e : Engine power point speed

[0041] n f : Silicone oil fan speed

[0042] n i : Silicone oil fan input speed

[0043] b: Silicone oil fan pulley speed ratio

[0044] For example, the slip rate of the silicone oil fan tested on the vehicle is 5%, and then the silicone oil fan is installed on the silicone oil fan test bench, and the input speed is n iAdjust the back pressure control system of the silicone oil fan test bench and the temperature of the silicone oil clutch front air outlet to keep the silicone oil fan slip rate consistent with that of the vehicle, and also make the silicone oil fan slip rate 5%;

[0045] B) Test the different speed torques of the silicone oil fan under the above test environment, and then calculate the fan power according to the following formula:

[0046]

[0047] P: Silicone oil fan power

[0048] T: Silicone oil fan torque

[0049] C) Fit the fan power calculated at different speeds to the speed-power curve and obtain the fitting formula, see the attached Figure 1 .

[0050] D) Install this type of fan on the vehicle and conduct a road test or a hub test to test the silicone oil fan speed n and record the sampling frequency f.

[0051] E) Calculating the silicone oil fan power using the silicone oil fan speed obtained from the road test or the hub test using the fitting formula in step C;

[0052] P i =a*n 3

[0053] a: fitting coefficient

[0054] P i :The power of the silicone oil fan at different times during the test

[0055] F) Calculate the energy consumption of the silicone oil fan at different time periods according to the following formula.

[0056]

[0057] Wi: Energy consumption of silicone oil fan at different time periods

[0058] f: Sampling frequency during the test

[0059] G) Calculate the total energy consumption of the silicone oil fan during the entire road test or hub test according to the following formula:

[0060] W=∑W i

[0061] W: Total energy consumption during the test.

[0062] The above illustrates and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for equivalently calculating the energy consumption of a silicone oil fan, characterized by: The following steps are involved: A) Silicone oil fan test bench calibration: Establish the connection between the silicone oil fan test bench and the vehicle test environment through the slip characteristics of the silicone oil fan; B) Test the different speed torques of the silicone oil fan under the above test environment, and then calculate the fan power according to the following formula: Where: P is the power of the silicone oil fan, T is the torque of the silicone oil fan; C) Fitting the fan power calculated at different speeds to a speed-power curve and obtaining a fitting formula; D) Install the fan on the vehicle and conduct a road test or a hub test to measure the speed n of the silicone oil fan and record the sampling frequency f; E) The silicone oil fan speed obtained from the road test or the hub test is used to calculate the silicone oil fan power using the fitting formula in step C: P i =a*n 3 Where: a is the fitting coefficient, P i is the power of the silicone oil fan at different times during the test; F) Calculate the energy consumption of the silicone oil fan at different times according to the following formula Where: Wi is the energy consumption of the silicone oil fan at different time periods, f is the sampling frequency during the test; G) Calculate the total energy consumption of the silicone oil fan during the entire road test or hub test according to the following formula: W=∑W i Where: W is the total energy consumption during the test.

2. The method for equivalently calculating the energy consumption of a silicone oil fan according to claim 1, wherein: The specific steps of step A) are: First, the characteristic parameter slip of the silicone oil fan is tested on the whole vehicle. The engine speed is the power point speed, and the silicone oil fan control signal is the full meshing signal. After the silicone oil fan speed stabilizes, the silicone oil fan speed is recorded, and its slip rate [%] is calculated according to the following formula: n i =n e *b Where: n e is the engine power point speed, n f is the speed of the silicone oil fan, n i is the input speed of the silicone oil fan, b is the speed ratio of the silicone oil fan pulley; Then the silicone oil fan is installed on the silicone oil fan test bench, and the input speed is n i , adjust the back pressure regulation system of the silicone oil fan test bench and the temperature of the silicone oil clutch front air outlet to make the silicone oil fan slip rate consistent with that of the vehicle.

Images