Influences of Initial Braking Velocity and Passenger Capacity on Mean Fully Developed Deceleration

Abstract

In order to improve the comprehensive and rationality of examination for driving braking performance with Mean Fully Developed Deceleration (MFDD) in road test, also to provide a basis for driving braking performance evaluation with MFDD when real driving, an approach for determining the MFDD threshold is proposed considering initial braking velocity and passenger capacity. According to the vehicle braking performance road test rules in GB7258, a simulation model is built, and simulation tests are made with different initial braking velocities. Based on simulation data, MFDD is calculated, and the curve of MFDD with initial braking velocity is also given, and then the effects of initial braking velocity on MFDD and its threshold are analyzed; the curves of MFDD thresholds with initial braking velocity are plotted with no-load and full-load respectively. The influence of passenger capacity on MFDD threshold is analyzed, and the curve of MFDD threshold with passenger capacity is given, too. Finally, the formula of MFDD threshold with initial braking velocity, seating capacity and passenger capacity is resulted.

The influence of the cargo weight and its position on the braking characteristics of light commercial vehicles

“…When securing lighter cargo enough top-over lashing and direct diagonal lashing. The top-over lashing was the most important because by increasing the frictional force to the mat, it prevented the cargo from sliding in all directions [3,16,[29][30][31][32][33].…”

Comparison of braking properties of selected vehicle with different methods

“…Some authors use the simulation methods [25]. Other studies [9,10,13] verify the brake intervention time according to various road friction factors, the simulation scenario reflected the vehicle velocity and road curvature radius. The novel approach of this research paper consists in the testing with the smartphone and the decelographer to verify the possibility to use the smartphone as the research measurement tool in various areas [20].…”

Braking Characteristics of the Specified Modern Electric Vehicle During Intensive Braking

“…The brake system fundamentally affects the level of vehicle active safety [4]. The design and technical condition of the brake system, together with tyres [1] and other factors, such as the road surface and the slope [3,6], influence the directional stability of a vehicle during the braking, and the braking distance length [3]. The braking distance represents the distance which is travelled by a vehicle from the moment of pressing the brake pedal till the vehicle stops, or till the moment when the driver stops applying the brake pedal [3,5].…”