The evaluation and the intended EU regulation for PM emission from LDV’s brake wear

Abstract

The latest research in the US and EC shows that the emission of brake wear particles of traditional power LDV is about 5-7 mg/km, which is higher than the PM limit of type I test in phase 6b of GB18352.6-2016 standard. The vehicle technical configurations affecting the PMBW actor. The BWPM can be cut almost a half by brake energy recovery technology, and the emissions from pads of NAO material can be lower than that of Low-Metallic material. The average speed of trips and the load on the vehicle are also relevant dependent. Some harmful substances to health or environment, such as Cu and Sb are found in the PM. The EU test method has completed the framework construction and parameters setting, and the regulation is expected to be released in 2022. Limit proposal options under consideration are 7mg/km or 5mg/kg. Speed cycle, ambient temperature and cooling air have influence on the measured value in brake wear tests. It is necessary to investigate whether the WLTP-Brake Cycle is in accordance to LDVs’ application in China, and to develop a test cycle for China.

Keywords

• brake wear
• brake wear particulate matter emissions
• test procedure
• wltp-brake cycle
• light duty vehicles