Researchers have shown that unskilled drivers fail to apply sufficient force on brake pedal in emergency. To solve this problem, Brake Assist System (BAS) is used to enhance the vacuum brake booster p....
In the research project between the Institute of Automotive Engineering (FZD) of the Technische Universität Darmstadt (TUD) and Continental Teves AG & Co. oHG a new modeling concept has been developed....
This paper focuses on the interaction in friction behavior between the surface texture of brake discs, rotational directions in braking operations and metal-cutting process, and friction materials wit....
This paper studies the effects of various types of parking brake cable construction on parking brake system efficiency. Testing was conducted on a variety of common cable constructions from several in....
There has to be a good co-relation/ relationship between the pedal effort applied, pedal travel, deceleration level achieved and stopping distance for “good brake feel”. Brake feel also depend upon th....
The importance of achieving good (low) assembled lateral runout of the brake disc is well recognized in the industry - it is a critical feature for avoiding issues such as wear-induced disc thickness ....
Control of brake drag is an important disc brake corner OEM requirement to minimize brake judder, friction material temperatures and fuel consumption. Brake calipers usually include clearances between....
Fuel economy can be increased by reducing running resistance or mechanical drag. Since modern disk brake systems produce mechanical drag, a component-level test method was developed to measure and und....
This paper will outline the technical challenges experienced and the engineering methods used to overcome them during the endeavor to reduce wheel hub units mass and friction. Results achieved by the ....
The ISO TC22/SWG2 - Brake Lining Committee established a task force to determine and analyze root causes for variability during dynamometer brake performance testing. SAE paper 2010-01-1697 “Brake Dyn....
Dynamic aspects in the understanding of friction are increasingly coming into focus. Therefore, test arrangements are required, which allow dynamic measurements as well, especially with defined and re....
Research and development tools for investigations of various facets of braking processes cover three major groups of devices: Dynamometer test rigs: assessment of performance, durability, life cycle a....
Passenger car NAO(Non-Asbestos Organic) disc pads were subjected to low and high humidity conditions. Humidity is found to measurably affect pad dimensions, pad hardness, compressibility, friction, pa....
A porous calcium silicate by the name of Promaxon®-D has been widely used in friction materials. Especially in NAO/non-steel (ceramic) disc pad applications, Promaxon®-D is an important ingredient of ....
Copper has been regarded as one of the indispensable ingredients in the brake friction materials since it provides high thermal diffusivity at the sliding interface. However, the recent regulations ag....
Titanate compounds are well-known for being widely used in Non-Asbestos Organic (NAO) brake pad formulations. These NAO formulations provide excellent performance in friction stability and a low amoun....
Brake squeal is usually investigated using linearized models and the eigenvalues of the linear equations of motion. Eigenvalues with positive real parts are interpreted as the onset of squeal. Nonline....
Low frequency brake system noise has been a systemic and ongoing issue for several automakers. The noise is a combined effect of brake and suspension systems working with each other. The noise transmi....
Creep-groan noise is a low frequency noise less than 1000Hz and occurs when the vehicle is moving from stop or slowly stopping while the brake is applied at low brake pressure. The vibration source ca....
Rust accumulated on disc rotor surfaces causes brake judder and excessive grind noise. This low frequency noise phenomenon is audible especially at low vehicle speed without masking from other noise s....