Patent ID: 11938938
Assignee: BRIDGESTONE CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  G  Y | IPC B  G

Claim 0:
1. A tire noise test method to be conducted while a vehicle is driven automatically, comprising:
operating a control unit including at least one processor when the vehicle reaches a predetermined position or reaches a predetermined speed, for putting the vehicle into coast-traveling with a prime mover of the vehicle in a non-driving state;
operating a measuring unit for measuring tire noise during the coast-traveling of the vehicle;
operating the control unit to subtract a vehicle speed at a starting point of a tire noise measuring zone, from a vehicle speed at the time point of starting the coast-traveling, thereby calculating a speed reduction amount when a first tire noise test has been conducted; and
operating the control unit to add a preset speed at the start point of the zone for measuring the tire noise in a next tire noise test and said speed reduction amount, thereby to calculate the predetermined speed for a next tire noise test.