CONTINUING A VEHICLE FITTED WITH RUN FLAT TYRES

Modern vehicles are equipped with many systems that monitor the security of driving. An example is the tyre pressure monitoring system that shows a fault if the tyre pressure is lowered. Low tyre pressure or no pressure at all (0 kPa) means that continuing driving may lead to a dangerous situation. Prolonged driving of the vehicle at 0 kPa in the tyre ends with tyre burst, rim damage, or even loss of stability. Therefore, on the automotive market, manufacturers offer Run Flat tyres adapted to emergency driving with a pressure of 0 kPa. This article presents the results of an experimental research in the field of vehicle dynamics, continuing driving a vehicle with a loss of tyre pressure. These tests were carried out not only to confirm the data provided by tyre manufacturers and to verify the vehicle's driveability but also to analyse the effectiveness of stopping vehicles equipped with this type of tyres using, for example, police studs, especially when vehicles are used for crimes or terrorist activities.

Design and Research on the Safety Control System of a Bus

In order to improve the safety of buses, based on the research of bus tyre pressure and temperature monitoring system, the control strategy of independent safety control system is proposed, namely in the tyre abnormal initial sound warning prompt, later will enter the fault mode engine "limp home", limiting the power and velocity of the engine, but in the tyre burst or rapid leak the emergency braking control system can take effects for bus, while the engine is "idle" working mode, the driver controls the direction of travel and brake on the bus is just as input of emergency braking control system. Compared with the traditional tyre pressure monitoring system, the system can not only realize the tyre pressure abnormal warning, but also realize the emergency brake control, and the safety of control system which has been installed on the VDS A01 models achieve the basic performance requirements for our design. It has good practical value.