A test method for engine lubricating oil consumption based on a whole vehicle

Abstract

This invention relates to a method for testing engine lubricating oil consumption based on a complete vehicle, including vehicle preparation; initial measurement; conducting real-vehicle road tests; final measurement; and outputting results. This invention analyzes and integrates previous test data, limits the test conditions, amplifies conditions with high lubricating oil consumption coefficients, increases the test intensity coefficient, shortens the test cycle and mileage, and reduces test costs. By amplifying and intensifying the conditions with the greatest impact on abnormal lubricating oil consumption, this method establishes high-speed road test conditions and low-speed road test conditions, which can fully verify whether there is a risk of abnormal lubricating oil consumption in the vehicle engine. This invention improves the reproducibility of the test operation by conducting high-speed and low-speed road tests on the test vehicle, and by performing initial and final measurements on the test vehicle engine and calculating and analyzing the results, it provides objective data for analyzing test problems.

Description

Technical Field

[0001] This invention belongs to the field of passenger vehicle testing technology, specifically relating to a test method for engine lubricating oil consumption based on the whole vehicle. Background Technology

[0002] Engine oil plays a vital role inside the engine, including lubricating, cooling, cleaning, and sealing all friction surfaces. Abnormal engine oil consumption can increase vehicle maintenance costs, affect emissions, and even cause engine bearing failure or cylinder scoring. In severe cases, it can lead to traffic accidents, resulting in financial losses and even endangering lives.

[0003] Traditional engine oil consumption tests involve long testing cycles, high mileage, and high costs. Therefore, there is an urgent need to develop a new method for testing engine oil consumption to effectively address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide a test method for engine lubricating oil consumption based on a complete vehicle, in order to solve the problem of abnormal engine lubricating oil consumption. Through high-speed and low-speed road tests on a real vehicle, the engine lubricating oil consumption is measured, calculated, and analyzed, providing objective data for engine lubricating oil consumption test analysis.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A method for testing engine lubricating oil consumption based on a whole vehicle includes the following steps:

[0007] A. Preparation of the test vehicle

[0008] Before the test, the vehicle equipped with the test engine will be driven for 1000km to break in; the tire pressure will be checked according to the factory requirements; and the air conditioning filter and air filter will be replaced.

[0009] B. Initial Measurement

[0010] B1. Start the vehicle and turn off the engine immediately after the water temperature reaches 90℃. Manually turn the engine crankshaft clockwise 2 times. Remove the oil drain plug and oil filter from the engine oil pan and drain the lubricating oil until it drips down. Record the time. Reinstall the oil drain plug after 1 hour.

[0011] B2. Weigh the new oil filter and record the weight as M. 滤 Install it on the engine;

[0012] B3. Record the weight M of the engine lubricating oil and its container before filling. 原Add lubricating oil to the engine until the dipstick reaches the center line. After adding the oil, record the weight M of the remaining engine lubricating oil and its container. 余 Calculate the amount of engine oil M to be added before the test according to formula (1). 前 :

[0013] M 前 =M 原 -M 余 (1);

[0014] C. Conduct real-vehicle road tests:

[0015] C1. Terms and Definitions;

[0016] C2. High-speed driving condition: The high-speed driving condition should be carried out on a closed road surface that meets the conditions for high-speed driving;

[0017] C3. Low-speed driving conditions: Low-speed driving conditions should be carried out on road surfaces that meet the conditions for low-speed driving.

[0018] D. Final Measurement:

[0019] D1. Prepare a reservoir for collecting used engine oil and oil filter, weigh them, and record the weight as M. 罐1 Prepare a cloth for wiping away the engine oil, and record its weight as M. 布1 Start the vehicle and turn it off immediately after the water temperature reaches 90℃. Manually turn the engine crankshaft clockwise 2 times.

[0020] D2. Remove the engine oil pan drain plug and oil filter to drain the engine oil into the reservoir. Place the oil filter into the reservoir. Wipe the drain plug, oil filter base, and other areas contaminated with oil with a cloth. After the oil drips down, record the time. Reinstall the drain plug after 1 hour.

[0021] D3. Weigh the reservoir containing the used lubricating oil and oil filter, and record the weight as M. 罐2 Weigh the cloth used to wipe away the engine oil and record the weight as M. 布2 ;

[0022] D4. Calculate the weight of the old lubricating oil to be released according to formula (2) as M. 后 :

[0023] M 后 =M 罐2 +M 布2 -M 罐1 -M 布1- M 滤 (2)

[0024] D5. Calculate the lubricating oil consumption rate η according to formula (3):

[0025] η=[(M前 -M 后 ) / M 前 100% (3)

[0026] E. Output Results:

[0027] The engine's lubricating oil consumption rate determines whether the engine lubricating oil consumption test is qualified.

[0028] Further, step C1 specifically involves: V max Maximum speed of the vehicle; V mid : Vehicle at a moderate speed; such as V max ≥180km / h, V mid =120km / h; if 160km / h < V max <180km / h, V mid =100km / h; such as V max ≤160km / h, V mid =80km / h; V min The lowest stable speed in the vehicle's lowest gear.

[0029] Furthermore, V1 = 0.5(V max +V mid V2 = 0.5(V) max +V1); V3 = 0.7V max +0.3V1; V4 = 2V min .

[0030] Further, in step C2, the vehicle undergoes a high-speed road test in the following sequence:

[0031] C21. The vehicle accelerates from a standstill to V at full throttle. mid and maintain V mid Drive at a constant speed for 60 seconds; then brake suddenly and fully to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds.

[0032] C22. The vehicle accelerates from a standstill to V at full throttle. mid and maintain V mid Drive at a constant speed for 60 seconds; then accelerate to V1 with full throttle and maintain V1 speed for 60 seconds; then brake quickly and fully to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds.

[0033] C23. Accelerate the vehicle from a standstill to V1 at full throttle and maintain a constant speed of V1 for 60 seconds; then accelerate to V2 at full throttle and maintain a constant speed of V2 for 60 seconds; then brake suddenly to a complete stop and let the vehicle idle in neutral for 60 seconds.

[0034] C24. Accelerate the vehicle from a standstill to V2 at full throttle and maintain a constant speed of V2 for 60 seconds; then accelerate to V3 at full throttle and maintain a constant speed of V3 for 60 seconds; then quickly brake to a complete stop and let the vehicle idle in neutral for 60 seconds.

[0035] C25. The vehicle accelerates from a standstill to V3 at full throttle and maintains a constant speed of V3 for 60 seconds; then accelerates to V3 at full throttle. max and maintain V max Drive at a constant speed for 300 seconds; then brake suddenly and fully to bring the vehicle to a complete stop, and then idle in neutral for 300 seconds.

[0036] C26. Repeat steps C21-C24 until the high-speed test mileage reaches the set value.

[0037] Further, in step C26, the test mileage for the high-speed operating condition is 9000km.

[0038] Furthermore, in step C3, the vehicle undergoes a low-speed road test in the following sequence:

[0039] The C31 vehicle is accelerated from a standstill to V4 with full throttle, then the accelerator pedal is quickly released, and the vehicle coasts to speed Vmin; then it is accelerated to V4 again with full throttle, then the accelerator pedal is quickly released, and the vehicle coasts to speed Vmin. This process is repeated until the vehicle reaches V4 for the 6th time. Then the accelerator pedal is quickly released, and the vehicle is brought to a complete stop by full braking. The vehicle is then left to idle in neutral for 300 seconds.

[0040] C32. Repeat step C31 until the low-speed test mileage reaches the set value.

[0041] Furthermore, in step C32, the test mileage for the low-speed operating condition is 1000km.

[0042] Further, in step E, the criterion for determining the engine lubricating oil consumption rate is η≤5%.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] This invention analyzes and integrates previous test data, limits the test conditions, amplifies the conditions with high lubricant consumption coefficients, increases the test intensity coefficient, shortens the test cycle and test mileage, reduces test costs, assesses engine lubricant consumption, prevents problematic vehicles from entering the market, saves vehicle use and after-sales costs, and improves vehicle reliability and safety.

[0045] Specifically, it includes the following advantages:

[0046] 1. This invention is based on a test method for engine lubricating oil consumption of a whole vehicle. By amplifying and strengthening the working conditions that have the greatest impact on abnormal lubricating oil consumption, high-speed road test conditions and low-speed road test conditions are formulated, which can fully verify whether there is a risk of abnormal lubricating oil consumption in the vehicle engine.

[0047] 2. This invention improves the reproducibility of test operations by conducting high-speed and low-speed road tests on the test vehicle, and performs initial and final measurements on the test vehicle engine, and calculates and analyzes the results to provide objective data for analyzing test problems. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the high-speed road test conditions;

[0050] Figure 2 This is a schematic diagram of low-speed road test conditions;

[0051] Figure 3 This is the experimental flowchart. Detailed Implementation

[0052] The present invention will be further described below with reference to embodiments:

[0053] The following is in conjunction with the appendix Figure 1 Appendix Figure 2 Appendix Figure 3 The present invention will be further described in detail with reference to specific embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] A method for testing engine lubricating oil consumption based on a whole vehicle includes the following steps:

[0055] 1. Preparation of test vehicles

[0056] Before the test, the vehicle equipped with the test engine will be driven for 1000km to break in; the tire pressure will be checked according to the factory requirements; and the air conditioning filter and air filter will be replaced.

[0057] 2. Initial Measurement

[0058] 2.1 Start the vehicle and turn off the engine immediately after the water temperature reaches 90℃. Manually rotate the engine crankshaft clockwise 2 times. Remove the engine oil pan drain plug and oil filter, drain the engine oil until it drips, record the time, and reinstall the drain plug after 1 hour.

[0059] 2.2 Weigh the new oil filter and record the weight as M. 滤 It is then installed on the engine.

[0060] 2.3 Record the weight M of the engine lubricating oil and its container before filling. 原 Fill the engine with lubricating oil to the center line on the dipstick. After filling, record the weight M of the remaining engine lubricating oil and its container. 余 Calculate the amount of engine oil M to be added before the test according to formula (1). 前 :

[0061] M 前 =M 原 -M 余 (1)

[0062] 3. Conduct real-vehicle road tests:

[0063] 3.1 Terms and Definitions

[0064] 3.1.1, V max Maximum speed of the vehicle.

[0065] 3.1.2, V mid The vehicle is traveling at a moderate speed.

[0066] Such as V max ≥180km / h, V mid =120km / h;

[0067] For example, 160km / h < V max <180km / h,V mid =100km / h;

[0068] Such as V max ≤160km / h, V mid =80km / h;

[0069] 3.1.3, V min The lowest stable speed in the vehicle's lowest gear.

[0070] 3.1.4, V1 = 0.5(V max +V mid )

[0071] V2 = 0.5(V max +V1)

[0072] V3 = 0.7V max +0.3V1

[0073] V4 = 2V min

[0074] 3.2 High-speed operating conditions:

[0075] High-speed driving tests should be conducted on a closed road surface suitable for high-speed driving. The vehicle should undergo high-speed road testing in the following sequence:

[0076] 3.2.1. The vehicle accelerates from a standstill to V at full throttle. mid and maintain V mid Drive at a constant speed for 60 seconds; then brake suddenly and fully to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds.

[0077] 3.2.2, The vehicle accelerates from a standstill to V at full throttle. mid and maintain V mid Drive at a constant speed for 60 seconds; then accelerate to V1 at full throttle and maintain V1 speed for 60 seconds; quickly brake to a complete stop and then idle in neutral for 60 seconds.

[0078] 3.2.3. Accelerate the vehicle from a standstill to V1 at full throttle and maintain a constant speed of V1 for 60 seconds; then accelerate to V2 at full throttle and maintain a constant speed of V2 for 60 seconds; quickly apply full braking to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds.

[0079] 3.2.4. Accelerate the vehicle from a standstill to V2 at full throttle and maintain a constant speed of V2 for 60 seconds; then accelerate to V3 at full throttle and maintain a constant speed of V3 for 60 seconds; quickly apply full braking to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds.

[0080] 3.2.5. The vehicle accelerates from a standstill to V3 at full throttle and maintains a constant speed of V3 for 60 seconds; then accelerates to V3 at full throttle. max and maintain V max Drive at a constant speed for 300 seconds; then brake suddenly and fully to bring the vehicle to a complete stop, and then idle in neutral for 300 seconds.

[0081] 3.2.6 Repeat steps 3.2.1-3.2.4 until the high-speed test mileage reaches 9000km.

[0082] 3.3 Low-speed operating conditions:

[0083] Low-speed driving tests should be conducted on road surfaces suitable for low-speed driving. The vehicle should undergo low-speed road testing in the following sequence:

[0084] 3.3.1. Accelerate the vehicle from a standstill to V4 with full throttle, then quickly release the accelerator pedal and coast to speed V.min Accelerate again to V4 with full throttle, then quickly release the accelerator pedal and coast to speed V. min Repeat this process until the 6th V4, then quickly release the accelerator pedal, apply full braking to bring the vehicle to a complete stop, and then idle in neutral for 300 seconds.

[0085] 3.3.2 Repeat step 3.3.1 until the low-speed test mileage reaches 1000km.

[0086] 4. Final Measurement:

[0087] 4.1 Prepare a reservoir for collecting used engine oil and oil filter, weigh and record the weight as M. 罐1 Prepare a cloth for wiping away the engine oil, and record its weight as M. 布1 Start the vehicle and turn off the engine immediately after the water temperature reaches 90℃. Manually turn the engine crankshaft clockwise 2 times.

[0088] 4.2 Remove the engine oil pan drain plug and oil filter to drain the engine oil into the reservoir. Place the oil filter into the reservoir. Wipe the drain plug, oil filter base, and other areas contaminated with oil with a cloth. After the oil drips down, record the time. Reinstall the drain plug after 1 hour.

[0089] 4.3 Weigh the reservoir containing the used lubricating oil and oil filter, and record the weight as M. 罐2 Weigh the cloth used to wipe away the engine oil and record the weight as M. 布2 .

[0090] 4.4 Calculate the weight of the old lubricating oil to be drained as M according to formula (2). 后 :

[0091] M 后 =M 罐2 +M 布2 -M 罐1 -M 布1 -M 滤 (2)

[0092] 4.5 Calculate the lubricating oil consumption rate η according to formula (3):

[0093] η=[(M 前 -M 后 ) / M 前 100% (3)

[0094] 5. Output results:

[0095] If the engine lubricating oil consumption rate η > 5%, the engine lubricating oil consumption test is deemed unqualified. Note that the above is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for testing engine lubricating oil consumption based on a whole vehicle, characterized in that, Includes the following steps: A. Preparation of the test vehicle Before the test, the vehicle equipped with the test engine will be driven for 1000km to break in; the tire pressure will be checked according to the factory requirements; and the air conditioning filter and air filter will be replaced. B. Initial Measurement B1. Start the vehicle and turn off the engine immediately after the water temperature reaches 90℃. Manually turn the engine crankshaft clockwise 2 times. Remove the oil drain plug and oil filter from the engine oil pan and drain the lubricating oil until it drips down. Record the time. Reinstall the oil drain plug after 1 hour. B2. Weigh the new oil filter and record the weight as M. 滤 Install it on the engine; B3. Record the weight M of the engine lubricating oil and its container before filling. 原 Add lubricating oil to the engine until it reaches the center line on the dipstick. After adding the oil, record the weight M of the remaining engine lubricating oil and its container. 余 Calculate the amount of engine oil M added before the test according to formula (1). 前 : M 前 =M 原 -M 余 (1); C. Conduct real-vehicle road tests: C1. Terms and Definitions; C2. High-speed driving condition: The high-speed driving condition should be carried out on a closed road surface that meets the conditions for high-speed driving; C3. Low-speed driving conditions: Low-speed driving conditions should be carried out on road surfaces that meet the conditions for low-speed driving. D. Final Measurement: D1. Prepare a reservoir for collecting used engine oil and oil filter, weigh it, and record the weight as M. 罐1 Prepare a cloth for wiping away the engine oil, and record its weight as M. 布1 Start the vehicle and turn it off immediately after the water temperature reaches 90℃. Manually turn the engine crankshaft clockwise 2 times. D2. Remove the engine oil pan drain plug and oil filter to drain the engine oil into the reservoir, and place the oil filter into the reservoir. Wipe the drain plug, oil filter base, and other areas contaminated with oil with a cloth. After the oil drips down, record the time. Reinstall the drain plug after 1 hour. D3. Weigh the reservoir containing the used lubricating oil and oil filter, and record the weight as M. 罐2 Weigh the cloth used to wipe away the engine oil and record the weight as M. 布2 ; D4. Calculate the weight of the old lubricating oil to be released according to formula (2) as M. 后 : M 后 = M 罐2 +M 布2 - M 罐1 -M 布1- M 滤 (2) D5. Calculate the lubricating oil consumption rate ŋ according to formula (3): ŋ= [(M 前 -M 后 ) / I 前 ]100% (3) E. Output Results: The engine oil consumption test is judged based on the engine oil consumption rate to determine whether the engine oil consumption test is qualified. Step C1, specifically: V max Maximum speed of the vehicle; V mid : The vehicle is traveling at a moderate speed; when V max At speeds ≥180km / h, V mid =120km / h; when 160km / h < V max When the speed is <180km / h, V mid =100 km / h; when V max When the speed is ≤160km / h, V mid =80 km / h; V min The lowest stable speed of the vehicle in its lowest gear; V1 = 0.5 (V max + V mid V2 = 0.5 (V max +V1); V3 = 0.7V max +0.3V1; V4 = 2 V min ; Step C2: The vehicle undergoes high-speed road testing in the following sequence: C21. The vehicle accelerates from a standstill to V at full throttle. mid and maintain V mid Drive at a constant speed for 60 seconds; then brake suddenly and fully to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds. C22. The vehicle accelerates from a standstill to V at full throttle. mid and maintain V mid Drive at a constant speed for 60 seconds; then accelerate to V1 with full throttle and maintain a constant speed of V1 for 60 seconds; then brake quickly and fully to bring the vehicle to a complete stop, and then idle in neutral for 60 seconds. C23. Accelerate the vehicle from a standstill to V1 at full throttle and maintain a constant speed of V1 for 60 seconds; then accelerate to V2 at full throttle and maintain a constant speed of V2 for 60 seconds; then brake suddenly to a complete stop and let the vehicle idle in neutral for 60 seconds. C24. Accelerate the vehicle from a standstill to V2 with full throttle and maintain a constant speed of V2 for 60 seconds; then accelerate to V3 with full throttle and maintain a constant speed of V3 for 60 seconds; then quickly brake to a complete stop and let the vehicle idle in neutral for 60 seconds. C25. The vehicle accelerates from a standstill to V3 at full throttle and maintains a constant speed of V3 for 60 seconds; then accelerates to V3 at full throttle. max and maintain V max Drive at a constant speed for 300 seconds; then brake suddenly and fully to bring the vehicle to a complete stop, and then idle in neutral for 300 seconds. C26. Repeat steps C21-C24 until the high-speed test mileage reaches the set value. Step C26, the test mileage for the high-speed operating condition is 9000km; In step C3, the vehicle undergoes low-speed road testing in the following sequence: The C31 vehicle accelerates from a standstill to V4 at full throttle, then quickly releases the accelerator pedal and coasts to speed V. min Accelerate again to V4 with full throttle, then quickly release the accelerator pedal and coast to speed V. min Repeat this process until the 6th V4, then quickly release the accelerator pedal, apply full braking to bring the vehicle to a complete stop, and then idle in neutral for 300 seconds. C32. Repeat step C31 until the low-speed test mileage reaches the set value. In step C32, the test mileage for the low-speed operating condition is 1000km; Step E: The standard for engine lubricating oil consumption rate is ≤5%.

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