Simplified numerical simulation as the base for throttle flow characteristics designation

2021

Materials

Braking systems have a direct impact on the safety of road users. That is why it is crucial that the performance of brakes be dependable and faultless. Unfortunately, the operating conditions of brakes during their operating time are affected by many variables, which results in changes in their tribological properties. This article presents an attempt to develop a methodology for studying how the operating time affects the value of the coefficient of friction and the abrasive wear factor. The Taguchi method of process optimization was used to plan the experiment, which was based on tests using the ball-cratering method. The results clearly show that the degree of wear affects the properties of the friction material used in the production process of brakes.

Section: Methodsmentioning

confidence: 99%

Impact of Operating Time on Selected Tribological Properties of the Friction Material in the Brake Pads of Passenger Cars

2021

Materials

“…Metal matrix composites are increasingly found in the latest solutions of the automotive industry. These matrices are used not only in braking systems, but also in clutches [71], intake systems [72], engine blocks [73], or fuel system elements, mainly classic injectors using piezoelectric stacks [74,75], as well as alternative fuels injectors [76]. These composites are also used as a partial or complete replacement for conventional materials in the production of monoqocue type frames [77].…”

Section: Bindermentioning

confidence: 99%

Conventional and unconventional materials used in the production of brake pads – review

Science and Engineering of Composite Materials

2020

Brakes are one of the most important components of vehicle. The brake system must be reliable and display unchanging action throughout its use, as it guards the health and life of many people. Properly matched friction pair, a disc and brake pad (in disc brakes), have a great impact on these factors. In most cases, the disc is made of grey cast iron. The brake pads are far more complex components. New technologies make it possible to develop materials with various compositions and different proportions, and connect them permanently in fully controllable processes. This elaboration shows that all these factors have a greater or lesser impact on the coefficient of friction, resistance to friction wear and high temperature, and brake pad’s operating life. This review collects the most important, the most interesting, and the most unconventional materials used in production of brake pads, and characterizes their impact on the tribological properties of pads.

“…Their popularity stems from low costs in comparison to the other tests, as the only requirement is a computer with some specific software. Unfortunately, while the other methods do not require precise knowledge of phenomena occurring in the studied process, in simulations, this is a necessity (Mieczkowski et al, 2007;Szpica, 2015b). Without detailed knowledge of the phenomena and their relationships, all described mathematically, and without abundant material data (such as density, thermal conductivity, heat capacity, etc.…”

Section: Tab 3 Main Advantages and Disadvantages Of Inertia Dynamommentioning

confidence: 99%

Common Methods in Analysing the Tribological Properties of Brake Pads and Discs – A Review

Acta Mechanica Et Automatica

2019

Disc brakes in passenger cars are extremely important due to safety concerns. Their operational quality largely rests on the conditions of contact between the working elements, which mainly consists offlat and dry sliding. The tribological phenomena thatoccur during braking are, unfortunately, extremely complex and difficult to recreate in laboratory settings. Many scientific institutes conduct research to improve our understanding of these phenomena. The results they present make it possible to continuously simplify the procedures for selecting friction materials and reducing the costs of identifying the properties of new products. This article analyses the methods commonly used by researchers. It also presents different set-ups of research stations, as well as the advantages and drawbacks of each method.