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1, the associated entries
Maximum, climbing, car, loaded
2. Description
Maximum grade (percentage): the maximum loaded vehicle when climbing slope capability. .
3. Test Method
1 test apparatus: a note table; B steel tape (50m); c benchmarking; D tachometer;… E. grade instrument. .
2 road conditions:
test ramp slope should be close to the maximum gradeability test vehicle.
long ramp is not less than 25m, the straight sections should 8-1Om front slope, the slope is greater than or equal to 30 percent cement pavement road surface, the ramp 30 is less than the percentage of the available asphalt pavement, is provided in the middle of the ramp 10m of road speed. Longitudinal more than 40 percent must be set up safety device. .
Test Method 3 SUV climbing:
(1) use of the lowest gear of the transmission test car, also the splitter to the lowest gear, all-wheel drive, stop close to the straight track sections.
(2) after the start, the full throttle for climbing; when the test vehicle is on a slope, the vehicle stops, the transmission into neutral, the engine stall 2 minutes, then start climbing.
(3) is measured and recorded by the time the link speed and engine speed.
(4) the process of climbing monitors the operating conditions of the instrument, after climbing to the top of the hill, check the presence or absence of abnormal parts, and detailed records.
4, the maximum climbing Principle
Most vehicles can climb the steep gradient of the label to a percentage of the maximum climbing automobile, an automobile is loaded with a first gear in overcoming the good road the maximum gradient, itCharacterization of climbing ability of the vehicle. The percentage ratio of the height difference value climbing slope or gradient angle of start and end points of its horizontal distance represented.
car climbing car climbing the ability to express. Only when the vehicle traction greater than the uphill drag and rolling resistance, the car can climb the slope. The expression of this measurement method is the ability of the vehicle uphill slope percentage, ratio of the height and horizontal slope with distance to indicate that the slope percentage percentage = tanθ × 100, where θ is the angle of the slope to the horizontal plane. For example “car climbing” is the percentage of 30, prepared according to the above formula: tanθ × 100 = percentage of 30 percentage, i.e. tanθ = 30/100 = 0.3, check the trigonometric function table obtained θ≈16 ° 42 “, i.e., the car can be climbing the most steep gradient is 16 ° 42 “. So for maximum gradeability for 100 vehicles means that the percentage of 45 °. Specific details see figure correspond to:
