Correct determination of deceleration is very important from the aspect of the
investigation of traffic accidents, because deceleration of the vehicle
involved in the traffic accident is of key importance for the preparation of
a quality finding and opinion of traffic expert. In this paper it was
conducted the investigation how the change of the pressure affects the
change ofthe temperature of the brake couple and how this change is later
reflected in the deceleration of the vehicle and the braking distance. In
order to find how the temperature influences the deceleration, it was
conducted experimental investigation. The experimental investigation was
conducted on the experimental test rig, which simulates the braking process
for the quarter of the vehicle mass, and the experimental investigation was
conducted for four different braking pressures: 2 MPa, 3 MPa, 4 MPa and 5
MPa. The temperature of the brake couple was measured during the entire
braking process. Also the difference between Mean Fully Developed
Deceleration and average vehicle deceleration is shown. It was found that for
the case when the braking pressure was 5 MPa, the maximum deceleration value
was greater than the value of gravity of Earth which may impair the
stability of the vehicle. When the braking pressure was 2 MPa, 3 MPa and 4
MPa, the temperature increased respectively, but in the last measurement,
when the braking pressure was 5 MPa, it began to decrease. Braking distance
decreased with the increment of the braking pressure. Also, with the braking
pressure increment, the deceleration increased in all cases.