Diesel engine bench test diesel heat value control system and control method

Abstract

The invention provides a diesel engine bench test diesel heat value control system which comprises a diesel monthly storage cabinet, a diesel weekly storage cabinet and a fuel consumption measuring and weighing unit, the diesel monthly storage cabinet is connected with the fuel consumption measuring and weighing unit through a diesel weekly storage cabinet pipeline, and the fuel consumption measuring and weighing unit is used for being connected with a test diesel engine through a pipeline. The monthly diesel storage cabinet is used for meeting the diesel consumption requirement of a monthly test of a diesel engine bench test, and the weekly diesel storage cabinet is used for meeting the diesel consumption requirement of a weekly test of the diesel engine bench test. A related control method is also provided. According to the diesel engine bench test diesel heat value control system and control method, the heat value fluctuation of mixed diesel oil can be controlled, the oil consumption measurement accuracy of the diesel engine bench test is met, and sufficient time is provided for adding new diesel oil and sampling and testing the heat value of the new diesel oil; therefore, the diesel oil consumption measuring device is suitable for large-scale popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of engine bench test, more specifically, to the technical field of diesel engine bench test, and in particular to a diesel engine bench test diesel calorific value control system and control method. Background Art

[0002] Engine bench testing refers to the testing and evaluation of various performance parameters of the engine on a specially designed test bench before the engine leaves the factory. This test method can simulate various states of the engine in actual work, such as the running state at different speeds and loads, so as to have a more comprehensive understanding of the engine's performance and potential problems.

[0003] When diesel engines are bench tested with diesel, there are precision requirements for diesel fuel consumption measurements: In order to accurately measure diesel fuel consumption, ensure that the diesel engine uses diesel from different batches, and that the calorific value of the diesel mixed with the new and old diesel after adding new diesel is controlled within 0.2% of the calorific value of the new diesel, so that the measured diesel fuel consumption will not have a large error.

[0004] However, in the existing diesel engine bench test, a diesel storage tank is generally used. The old diesel is used until the fuel volume of the diesel storage tank is close to the low fuel volume (required fuel filling capacity) and then new diesel is added. The calorific value report of the new diesel is used as the basis for calculating fuel consumption. This design has the following disadvantages:

[0005] 1. The capacity of the diesel storage tank is large. When the old diesel is used up to the point where the fuel level is close to the low level in the diesel storage tank, there will still be a large portion of the old diesel that has not been used. At this time, new diesel is added. When the calorific value of the new diesel differs greatly from that of the old diesel, the calorific value of the mixed diesel will differ greatly from that of the new diesel. This will result in a large error in the measured diesel fuel consumption.

[0006] 2. New diesel can only be added when the diesel in the diesel storage tank is close to the low oil level in the diesel storage tank. When the testing task is tight, it will be difficult to arrange and control the refueling arrangement.

[0007] Therefore, it is hoped to provide a diesel calorific value control system and control method for a diesel engine bench test, which can control the calorific value fluctuation of the mixed diesel, meet the fuel consumption measurement accuracy of the diesel engine bench test, and have sufficient time to arrange the addition of new diesel and sampling and testing the calorific value of the new diesel, thereby ensuring accurate diesel fuel consumption measurement and smooth bench testing. Summary of the invention

[0008] In order to overcome the shortcomings of the above-mentioned prior art, one purpose of the present invention is to provide a diesel calorific value control system for a diesel engine bench test, which can control the calorific value fluctuation of the mixed diesel, meet the fuel consumption measurement accuracy of the diesel engine bench test, and have sufficient time to arrange the addition of new diesel and sample the calorific value of the new diesel, thereby ensuring the accurate measurement of diesel fuel consumption and the smooth progress of the bench test, and is suitable for large-scale promotion and application.

[0009] Another object of the present invention is to provide a method for controlling the calorific value of diesel in a diesel engine bench test. By adopting this method, the calorific value fluctuation of the mixed diesel can be controlled to meet the fuel consumption measurement accuracy of the diesel engine bench test, and there is sufficient time to arrange the addition of new diesel and sampling and testing the calorific value of the new diesel, thereby ensuring the accuracy of the diesel fuel consumption measurement and the smooth progress of the bench test, which is suitable for large-scale promotion and application.

[0010] To achieve the above objectives, in a first aspect of the present invention, a diesel calorific value control system for a diesel engine bench test is provided, which is characterized in that it includes a diesel monthly storage cabinet, a diesel weekly storage cabinet and a fuel consumption measurement weighing unit, wherein:

[0011] The monthly diesel storage cabinet is connected to the fuel consumption measuring weighing unit through the diesel weekly storage cabinet pipeline. The fuel consumption measuring weighing unit is used for pipeline connection to the test diesel engine. The monthly diesel storage cabinet is used to meet the diesel usage requirements of the diesel engine bench test for one month. The weekly diesel storage cabinet is used to meet the diesel usage requirements of the diesel engine bench test for one week.

[0012] Preferably, the capacity of the diesel monthly storage tank is 150m 3 .

[0013] Preferably, the capacity of the diesel weekly storage tank is 32m 3 .

[0014] In a second aspect of the present invention, a method for controlling the calorific value of diesel fuel in a diesel engine bench test is provided, wherein the method adopts the above-mentioned diesel engine bench test diesel fuel calorific value control system, and the method comprises the following steps:

[0015] (1) connecting the fuel consumption measurement weighing unit pipeline to the test diesel engine, and performing a bench test on the test diesel engine;

[0016] (2) adding old diesel from the monthly diesel storage tank into the weekly diesel storage tank, so that the weekly diesel storage tank is in or nearly full state and the liquid level of the monthly diesel storage tank is reduced to the first required refueling capacity;

[0017] (3) adding new diesel into the monthly diesel storage tank so that the monthly diesel storage tank is full or nearly full, and sampling the new diesel to test the calorific value of the new diesel;

[0018] (4) When the liquid level of the diesel weekly storage tank drops to the second refueling required level, add new diesel from the diesel monthly storage tank into the diesel weekly storage tank, so that the diesel weekly storage tank is in or nearly full state;

[0019] (5) The fuel consumption of the mixed diesel formed by mixing the new diesel and the old diesel in the diesel weekly storage tank is calculated directly using the calorific value of the new diesel.

[0020] Preferably, the capacity of the diesel monthly storage tank is 150m 3 .

[0021] Preferably, the capacity of the diesel weekly storage tank is 32m 3 .

[0022] Preferably, in the step (2), "making the diesel weekly storage tank full or nearly full" specifically means making the oil volume in the diesel weekly storage tank 0.9375 of the capacity of the diesel weekly storage tank.

[0023] Preferably, in step (2), the first required refueling capacity is 0.01 of the capacity of the monthly diesel storage tank.

[0024] Preferably, in step (3), "making the monthly diesel storage tank full or nearly full" specifically means making the oil volume in the monthly diesel storage tank 0.877 of the capacity of the monthly diesel storage tank.

[0025] Preferably, in step (4), the second required refueling level is 0.03125 of the capacity of the diesel weekly storage tank.

[0026] The beneficial effects of the present invention are:

[0027] 1. The diesel calorific value control system for a diesel engine bench test of the present invention comprises a monthly diesel storage cabinet, a weekly diesel storage cabinet and a fuel consumption measurement weighing unit. The monthly diesel storage cabinet is connected to the fuel consumption measurement weighing unit via a diesel weekly storage cabinet pipeline. The fuel consumption measurement weighing unit is used to connect the test diesel engine with a pipeline. The monthly diesel storage cabinet is used to meet the diesel consumption requirement of a diesel engine bench test for one month. The weekly diesel storage cabinet is used to meet the diesel consumption requirement of a diesel engine bench test for one week. Therefore, it can control the calorific value fluctuation of the mixed diesel and meet the fuel consumption measurement accuracy of the diesel engine bench test. It also has sufficient time to arrange the addition of new diesel and the sampling and testing of the calorific value of the new diesel, thereby ensuring the accurate measurement of diesel fuel consumption and the smooth progress of the bench test, and is suitable for large-scale promotion and application.

[0028] 2. The diesel calorific value control method for a diesel engine bench test of the present invention comprises: (1) connecting the pipeline of the fuel consumption measurement weighing unit to the test diesel engine, and performing a bench test on the test diesel engine; (2) adding the old diesel in the diesel monthly storage cabinet to the diesel weekly storage cabinet, so that the diesel weekly storage cabinet is in or nearly full state and the liquid level of the diesel monthly storage cabinet is reduced to the first required refueling capacity; (3) adding oil to the diesel monthly storage cabinet, so that the diesel monthly storage cabinet is in or nearly full state, sampling the new diesel and testing the calorific value of the new diesel; (4) waiting for the diesel weekly storage cabinet to be filled with oil. The liquid level is lowered to the second refueling level, and new diesel in the diesel monthly storage tank is added to the diesel weekly storage tank, so that the diesel weekly storage tank is in or close to a full state; (5) the calorific value of the new diesel is directly used to calculate the fuel consumption of the mixed diesel formed by the new diesel and the old diesel in the diesel weekly storage tank. Therefore, the method can control the calorific value fluctuation of the mixed diesel, meet the fuel consumption measurement accuracy of the diesel engine bench test, and have sufficient time to arrange the addition of new diesel and the sampling and testing of the calorific value of the new diesel, so as to ensure the accuracy of the diesel fuel consumption measurement and the smooth progress of the bench test, which is suitable for large-scale promotion and application.

[0029] These and other objects, features and advantages of the present invention will be more fully reflected in the following detailed description and claims, and may be achieved by the means, devices and combinations thereof particularly pointed out in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a specific embodiment of the diesel engine bench test diesel calorific value control system of the present invention being connected to a test diesel engine when in use. DETAILED DESCRIPTION

[0031] In order to accurately measure the diesel fuel consumption in the diesel engine bench test, and to have sufficient time to arrange the addition of new diesel and the sampling and testing of the calorific value of the new diesel, so as to ensure the accuracy of the diesel fuel consumption measurement and the smooth progress of the bench test, the inventors have proposed a diesel engine bench test diesel calorific value control system and control method through in-depth and extensive research.

[0032] See also Figure 1 As shown, in a specific embodiment of the present invention, the diesel engine bench test diesel calorific value control system of the present invention includes a diesel monthly storage cabinet, a diesel weekly storage cabinet and a fuel consumption measurement weighing unit, wherein:

[0033] The monthly diesel storage cabinet is connected to the fuel consumption measuring weighing unit through the diesel weekly storage cabinet pipeline. The fuel consumption measuring weighing unit is used for pipeline connection to the test diesel engine. The monthly diesel storage cabinet is used to meet the diesel usage requirements of the diesel engine bench test for one month. The weekly diesel storage cabinet is used to meet the diesel usage requirements of the diesel engine bench test for one week.

[0034] The capacity of the monthly diesel storage tank can be determined as needed. In a specific embodiment of the present invention, the capacity of the monthly diesel storage tank is 150m3. 3 .

[0035] The capacity of the diesel weekly storage tank can be determined as needed. In a specific embodiment of the present invention, the capacity of the diesel weekly storage tank is 32m 3 .

[0036] The method for controlling the calorific value of diesel using the diesel engine bench test diesel calorific value control system of the present invention comprises the following steps:

[0037] (1) connecting the fuel consumption measurement weighing unit pipeline to the test diesel engine, and performing a bench test on the test diesel engine;

[0038] (2) adding old diesel from the monthly diesel storage tank into the weekly diesel storage tank, so that the weekly diesel storage tank is in or nearly full state and the liquid level of the monthly diesel storage tank is reduced to the first required refueling capacity;

[0039] (3) adding new diesel into the monthly diesel storage tank so that the monthly diesel storage tank is full or nearly full, and sampling the new diesel to test the calorific value of the new diesel;

[0040] (4) When the liquid level of the diesel weekly storage tank drops to the second refueling required level, add new diesel from the diesel monthly storage tank into the diesel weekly storage tank, so that the diesel weekly storage tank is in or nearly full state;

[0041] (5) The fuel consumption of the mixed diesel formed by mixing the new diesel and the old diesel in the diesel weekly storage tank is calculated directly using the calorific value of the new diesel.

[0042] In the step (2), "making the diesel weekly storage tank be in or nearly full state" may specifically include any suitable steps. In a specific embodiment of the present invention, in the step (2), "making the diesel weekly storage tank be in or nearly full state" specifically means making the oil amount in the diesel weekly storage tank be 0.9375 of the capacity of the diesel weekly storage tank.

[0043] In the step (2), the first required refueling capacity can be determined as needed. In a specific embodiment of the present invention, in the step (2), the first required refueling capacity is 0.01 of the capacity of the monthly diesel storage cabinet.

[0044] In the step (3), "making the monthly diesel storage tank be at or close to being full" may specifically include any suitable steps. In a specific embodiment of the present invention, in the step (3), "making the monthly diesel storage tank be at or close to being full" specifically means making the oil amount in the monthly diesel storage tank be 0.877 of the capacity of the monthly diesel storage tank.

[0045] In the step (4), the second required refueling level can be determined as needed. In a specific embodiment of the present invention, in the step (4), the second required refueling level is 0.03125 of the capacity of the diesel weekly storage tank.

[0046] In the step (4), "making the diesel weekly storage tank be in or nearly full state" may specifically include any suitable steps. In a specific embodiment of the present invention, in the step (4), "making the diesel weekly storage tank be in or nearly full state" specifically means making the oil amount in the diesel weekly storage tank be 0.9375 of the capacity of the diesel weekly storage tank.

[0047] Taking Wärtsilä W32 and W34 diesel engines as an example, the power range of common diesel engines is 3000KW to 6000KW. The diesel consumption range of a diesel engine in bench test is 3300KG to 6600KG, and an average of 4 engines are tested per week. 3 , diesel weekly storage cabinet selection 32m 3 , which can meet the above consumption and have a 15% margin.

[0048] A. Process flow:

[0049] Connect the fuel consumption measurement weighing unit pipeline to the test diesel engine, and conduct a bench test on the test diesel engine;

[0050] Before adding new diesel, add the old diesel from the monthly diesel storage tank to the weekly diesel storage tank, and use up the monthly diesel storage tank to 1.5m3. 3 , diesel weekly storage tank filled to 30m 3 This ensures a week of testing and provides enough time to add new diesel and test the calorific value of the new diesel;

[0051] 100 tons of new diesel (130m 3 ) Add diesel to the monthly storage tank and take samples to test the calorific value of the new diesel:

[0052] Wait until the old diesel in the diesel weekly storage cabinet is used up for 1m 3 , add the new diesel in the monthly diesel storage tank to the weekly diesel storage tank, and fill it up to 30m 3 ;

[0053] The calorific value of new diesel is directly used to calculate the fuel consumption of the mixed diesel made by mixing new diesel and old diesel in the diesel weekly storage cabinet.

[0054] B. Calculation verification:

[0055] 1. Old diesel in the system (LHV 41.9MJ / kg)

[0056] Diesel weekly storage cabinet 1m 3 + Pipeline (estimated) 1m 3 =2m 3 (6%).

[0057] 2. Add new diesel (LHV43.3MJ / kg) to the diesel weekly storage cabinet 29m 3 (94%).

[0058] In this way, the calorific value of the mixed diesel in the diesel weekly storage tank is LHV = 41.9X0.06+43.3X0.94 = 43.216MJ / kg

[0059] The difference between the calorific value of the mixed diesel and the calorific value of the new diesel is (43.3-43.216) / 43.3=0.193%, which meets the error requirement of diesel fuel consumption measurement.

[0060] Therefore, the present invention proposes a diesel calorific value control system and control method for a diesel engine bench test, which can control the correct mixing of new and old diesel to control the calorific value fluctuation of the mixed diesel, meet the fuel consumption measurement accuracy of the diesel engine bench test, and have sufficient time to arrange the addition of new diesel and sampling and testing the calorific value of the new diesel, thereby ensuring accurate diesel fuel consumption measurement and smooth bench testing.

[0061] In summary, the diesel calorific value control system and control method for the diesel engine bench test of the present invention can control the calorific value fluctuation of the mixed diesel, meet the fuel consumption measurement accuracy of the diesel engine bench test, and have sufficient time to arrange the addition of new diesel and sample the calorific value of the new diesel, thereby ensuring the accuracy of the diesel fuel consumption measurement and the smooth progress of the bench test, and is suitable for large-scale promotion and application.

[0062] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the description should be regarded as illustrative rather than restrictive.

Claims

1. A diesel engine bench test diesel calorific value control system, characterized in that: It includes a diesel monthly storage cabinet, a diesel weekly storage cabinet and a fuel consumption measurement weighing unit, including: The monthly diesel storage cabinet is connected to the fuel consumption measuring weighing unit through the diesel weekly storage cabinet pipeline. The fuel consumption measuring weighing unit is used for pipeline connection to the test diesel engine. The monthly diesel storage cabinet is used to meet the diesel usage requirements of the diesel engine bench test for one month. The weekly diesel storage cabinet is used to meet the diesel usage requirements of the diesel engine bench test for one week.

2. The diesel calorific value control system for diesel engine bench test according to claim 1 is characterized in that: The monthly diesel storage tank has a capacity of 150m 3 .

3. The diesel calorific value control system for diesel engine bench test according to claim 1, characterized in that: The capacity of the diesel weekly storage tank is 32m 3 .

4. A diesel engine bench test diesel calorific value control method, characterized in that: The diesel engine bench test diesel calorific value control system according to claim 1 is adopted, and the diesel engine bench test diesel calorific value control method comprises the following steps: (1) connecting the fuel consumption measurement weighing unit pipeline to the test diesel engine, and performing a bench test on the test diesel engine; (2) adding old diesel from the monthly diesel storage tank into the weekly diesel storage tank, so that the weekly diesel storage tank is in or nearly full state and the liquid level of the monthly diesel storage tank is reduced to the first required refueling capacity; (3) adding new diesel into the monthly diesel storage tank so that the monthly diesel storage tank is full or nearly full, and sampling the new diesel to test the calorific value of the new diesel; (4) When the liquid level of the diesel weekly storage tank drops to the second refueling required level, add new diesel from the diesel monthly storage tank into the diesel weekly storage tank, so that the diesel weekly storage tank is in or nearly full state; (5) The fuel consumption of the mixed diesel formed by mixing the new diesel and the old diesel in the diesel weekly storage tank is calculated directly using the calorific value of the new diesel.

5. The diesel calorific value control method for diesel engine bench test according to claim 4 is characterized in that: The monthly diesel storage tank has a capacity of 150m 3 .

6. The diesel calorific value control method for diesel engine bench test according to claim 4 is characterized in that: The capacity of the diesel weekly storage tank is 32m 3 .

7. The diesel calorific value control method for diesel engine bench test according to claim 4 is characterized in that: In the step (2), "making the diesel weekly storage tank full or nearly full" specifically means making the oil volume in the diesel weekly storage tank 0.9375 of the capacity of the diesel weekly storage tank.

8. The diesel calorific value control method for diesel engine bench test according to claim 4 is characterized in that: In the step (2), the first required refueling capacity is 0.01 of the capacity of the monthly diesel storage tank.

9. The diesel calorific value control method for diesel engine bench test according to claim 4, characterized in that: In the step (3), "making the monthly diesel storage tank full or nearly full" specifically means making the oil volume in the monthly diesel storage tank 0.877 of the capacity of the monthly diesel storage tank.

10. The diesel calorific value control method for diesel engine bench test according to claim 4, characterized in that: In step (4), the second required refueling level is 0.03125 of the capacity of the diesel weekly storage tank.

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