GB/T 39416-2020Test methods of fuel consumption for truck crane (English PDF)

3.1 Mid-extend Boom

Mid-extend boom refers to 2/3 of the full extension of the main boom of a crane, or the boom length closest to 2/3.

3.2 Fuel Consumption of Operating Cycle

Fuel consumption of operating cycle refers to the fuel consumed by a crane to complete the operation of lifting within a unit time under the specified operating conditions.

a) During the test of fuel consumption of operating cycle, the prototype shall be equipped with the working devices required for lifting operations specified by the manufacturer;

b) During the test of fuel consumption of driving cycle, the prototype shall have the driving state required by the total quality of the automobile product after being finalized in accordance with the relevant national standards.

4.2 Test Prototype

4.2.2 Run-in of prototype

Before the test, the prototype shall be run-in for no less than 50 km.

4.3 Instruments and Accuracy

4.3.1 The main test instruments and the maximum allowable error / accuracy level requirements are as follows:

a) Vehicle speed measuring instrument: the maximum allowable error is ± 0.5%;

b) Fuel flow meter: the maximum allowable error is ± 0.5%;

c) Timer: the minimum division value is 0.1 s;

d) Engine tachometer: the maximum allowable error is ± 1%;

e) Weighing instrument: the accuracy level is medium accuracy and above.

4.3.2 The main test instruments shall be qualified by the metrological verification institution and within the validity period.

5.1 Fuel Consumption of Operating Cycle

5.1.1 Outrigger working conditions of extension and retraction

5.1.1.1 The crane is in the parking state. The horizontal outriggers and the vertical outriggers move from the fully retracted state to the fully extended state, and then, move to the fully retracted state. Record the time and fuel consumption of each process of extension and retraction.

5.1.1.2 During the test, the outrigger throttles are respectively placed at the lowest speed position and the highest speed position of the engine when the outriggers are working as specified by the crane manufacturer.

5.1.1.3 Repeat the measurement for 5 times. 2001.

5.2 Fuel Consumption of Driving Cycle

5.2.1 Constant-speed driving conditions

5.2.1.1 When the crane is in the driving state, the crane with manual transmission shall be placed in the highest gear that satisfies the requirements of the test speed; the crane with automatic transmission shall be placed in the "D" gear, and the gear shall not be switched during the measurement. At each test speed, after maintaining it in smooth driving for at least 100 m, make the crane pass the test section of 500 m at a constant speed; measure the time and fuel consumption of the crane passing the section.

5.2.1.2 The test speeds are respectively: 10 km/h, 20 km/h, 30 km/h, 40 km/h, 50 km/h, 60 km/h and 70 km/h.

5.2.1.3 The difference between the average speed of each test and the specified test speed shall not exceed 1 km/h.

5.2.1.4 The difference between the instantaneous speed during the test and the specified test speed shall not exceed 2 km/h.

5.2.1.5 Each test speed shall be respectively measured twice on the test road.

5.2.1.6 The test results of each working condition shall be tested for repeatability in accordance with the stipulations of Chapter 6 in GB/T 12545.2-2001.

5.2.2 Accelerating driving conditions

5.2.2.1 When the crane is in the driving state, take the full throttle acceleration from the starting speed of 30 km/h to the ending speed of 50 km/h as the vehicle speed measurement interval. The crane with manual transmission shall be placed in the highest gear or the second highest gear (select the gear with a gear ratio of 1, if there is no such gear, then, select the gear with the gear ratio closest to 1); the crane with automatic transmission shall be placed in the "D" gear. Before acceleration, the vehicle speed shall be controlled to maintain constant-speed driving for at least 5 s within 28 km/h ~ 30 km/h. Quickly step on the accelerator pedal to the floor; meanwhile, start the measurement. Accelerate to the ending speed of 50 km/h and end the measurement. Record the measurement results of acceleration fuel consumption, acceleration time and distance, starting and ending speed, etc.

5.2.2.2 During the test, the difference between the starting speed and the ending speed and the specified speed shall be respectively within the range of -2 km/h ~ 0 km/h and 0 km/h ~ 2 km/h.

5.2.2.3 The acceleration test shall be respectively measured twice forwards and backwards on the test section.

5.2.2.4 Comply with the stipulations of 5.2.1.6 […]

5.2.3 Idle speed working conditions

5.2.3.1 The measurement of idle speed fuel consumption shall be immediately carried out after the end of the constant-speed driving conditions test and the accelerating driving conditions test.

5.2.3.2 During the measurement of idle speed fuel consumption, the crane shall be in the parked state; the clutch shall be in the engaged position; the crane with manual transmission shall be in the neutral position; the crane with automatic transmission shall be placed in the "parking" or "P" gear; the accelerator pedal shall be completely released. The engine speed shall be maintained at the idle speed specified by the crane manufacturer, with a speed deviation of ± 50 r/min.

5.2.3.3 The idle speed fuel consumption shall be measured after 300 s of idling and measured for 3 times. The duration of each measurement is 300 s. Record the idle speed fuel consumption and the engine speed. Take the arithmetic mean value of 3 idle speed fuel consumption measurement results.

5.2.4 Test result data recording and correction

5.2.4.1 See Table B.7 ~ Table B.9 in Appendix B for the table of fuel consumption test records of various working conditions.

5.2.4.2 Comply with the stipulations of 5.1.7.2 […]

6.1 Calculation of Fuel Consumption of Operating Cycle

6.1.1 Outrigger working conditions of extension and retraction

The fuel consumption of outrigger working conditions of extension and retraction shall be calculated in accordance with Formula (1):

Where, Qzt---fuel consumption of outrigger working conditions of extension and retraction, expressed in (L/h); […]