1 Scope
This document specifies the test items for the fuel consumption of self-propelled graders (hereinafter referred to as "graders"). Test conditions. Measurement methods. Test methods and test evaluation, etc.
This document applies to the measurement of the fuel consumption of motor graders.
2 Normative references
The contents of the following documents constitute essential provisions of this document by means of normative references in the text. Among them, the date of the reference documents only the date of the corresponding version applicable to this document; do not note the date of the reference documents. Its latest version (including all the revision sheets) is applicable to this document.
GB/T 6375 Test methods for traction force of earth moving machinery
GB/T 7920.9 Terminology and commercial specifications for earth-moving machinery graders
GB/T 8506-20081 Test methods for motor graders
GB/T 14782 Technical conditions for motor graders
GB 19147 Diesel fuel for vehicles
GB/T 36696-2018 Test method for fuel consumption of tyre loaders for earthmoving machinery
3 Terms and definitions
The terms and definitions defined in GB/T 14782, GB/T 7920.9 and GB/T 8506 apply to this document.
4 Test items
The test is carried out in accordance with the items specified below:
Leveling test;
Driving test;
Standby test;
Traction power test.
5 Test conditions
5.1 Test machine
5.1.1 The test machine shall be configured according to the basic configuration specified by the manufacturer.
5.1.2 The engine speed shall be within the specified range.
5.1.3 The fuel filling volume shall be not less than 2/3 of the fuel tank volume.
5.1.4 The test machine shall be fully warmed up before the test. Make the engine coolant outlet temperature not less than 70C, transmission oil temperature not less than 80C, hydraulic oil temperature not less than 50C.
5.1.5 Machines equipped with a variable speed control cooling fan shall be tested when the fan speed reaches at least 70% of the maximum fan speed specified by the manufacturer. The fan speed is allowed to drop at low engine speeds.
5.1.6 Where the driver's compartment is equipped with air conditioning, the air conditioning shall be switched off during the test.
5.2 Fuel
The fuel used for the test machine should comply with the provisions of GB 19147.
5.3 Accuracy of measuring instruments
The accuracy of the measuring instrument should comply with the following provisions:
Time: 0.01s;
Rotational speed: 1%;
Temperature: Shi 1 ℃;
Flow rate: earth 1%.
5.4 Environmental conditions
The test environment shall meet the following conditions:
Relative humidity: not more than 95%;
Ambient temperature:5℃
No rain and no snow.
6 Test method
6.1 Flat ground test
6.1.1 Test conditions
6.1.1.1 Test site
The test surface is a dry and flat soil surface, and the upper part of the test surface is turned loose with a plough, loosener or a grader or bulldozer equipped with a strong solid internal, and the thickness of the soil paving is 100mm~150mm.
6.1.1.2 Test procedure
The test method for grading is as specified in 5.18 of GB/T 8506-2008 and is carried out in the following states:
Shifting mode: for motor graders with automatic transmission mechanism, manual shifting mode should be selected for the test;
Travel gear: 1 gear forward;
Shovel leveling angle: 30°;
Cutting angle of the shovel: 45°;
Travel speed: maximum throttle and no steering operation:
6.2 Driving test
6.2.1 Test conditions
6.2.1.1 Test site
The test surface shall be a firm and straight asphalt or concrete surface. The longitudinal slope of the road surface is not greater than 0.5% and the transverse slope is not greater than 3%.
6.2.1.2 Test procedure
The driving test is carried out in the following states:.
I - Shift mode: for graders with automatic transmission mechanism, the manual shift mode shall be selected for the test;
Torque converter blocking: For motor graders with torque converter blocking gearboxes, the blocking switch should be turned on to enable the gearbox to be blocked during the test;
Travel gears: forward 5th gear and highest gear:
Travel speed: maximum throttle. Maximum travel speed in each gear. No steering;
Travel distance: After the grader has accelerated to the maximum speed in each gear. The distance travelled: after the grader has accelerated to the highest speed in each gear, the distance travelled is not less than 100m.
6.2.2 Number of tests and calculation of fuel consumption
The fuel consumption for the driving test is calculated according to Equation (2), with a scale factor of 50% for both test gears;
6.3 Standby test
6.4 Traction power test
The forward 1 gear traction power test is carried out according to the provisions of GB/T6375.
7 Test evaluation
Appendix A (informative) Grader fuel consumption test record sheet
Foreword
1 Scope
2 Normative references
GB/T 36696-2018 Test method for fuel consumption of tyre loaders for earthmoving machinery
3 Terms and definitions
4 Test items
5 Test conditions
6 Test method
7 Test evaluation
Appendix A (informative) Grader fuel consumption test record sheet
