The article presents an analysis of methods for measuring vehicle braking deceleration during road tests. The results of measurements performed with various types of instruments used in road tests are discussed, and errors made during measurements are evaluated.The measuring errors in relation to optical device were calculated.
1. INTRODUCTION
Effective, efficient, and reliable operation of the braking system is a fundamental condition for the safe use of a car. According to current regulations [3, 4], the assessment of braking system efficiency can be carried out directly, in road tests by measuring braking deceleration, and indirectly, under stationary conditions by measuring braking forces – using quasi-static or dynamic methods. During tests, the force exerted on the service brake pedal should not exceed 50 [daN] in passenger cars and 70 [daN] in trucks. Both indirect and direct measurement methods require specialized diagnostic instruments. There are many models of decelerometers available on the market that can be used in road tests. In practice, decelerometers are used in vehicle inspection stations when it is necessary to perform a diagnostic test on the road for a vehicle with an axle load greater than the permissible load for the rollers in the measuring stand.
The article presents an evaluation of the results of braking deceleration measurements of a passenger car, performed with selected instruments approved for use in vehicle inspection stations. (…)
The article contains 14636 characters. < /p>
Source: Logistics Magazine