Brake system test device and brake system test method of two-wheeled motor vehicle

A brake system test method of a two-wheeled motor vehicle for testing the operation of an antilock brake system provided on the two-wheeled motor vehicle, the method comprising:

• a brake input step for rotating a front wheel of the two-wheeled motor vehicle supported by a pair of front wheel support rollers and also rotating a rear wheel of the two-wheeled motor vehicle supported by a pair of rear wheel support rollers and fully inputting a brake of one of the wheels for which the antilock brake system operates;
• a measuring step for measuring the rotation speed of the wheel for which the antilock brake system operates by the brake input step via the support roller supporting the wheel;
• a computing step for computing, based on the value measured during the measuring step, a waveform generated accompanying the change in rotation speed of the wheel by the operation of the antilock brake system, the waveform having peak values and transition portions which fall before and after the peak values;
• and
• a performance determination step for determining that the brake system is OK when the peak values of the waveform obtained by the computing step falls within predetermined ranges during predetermined lapse times, and determining that the brake system is OK even if at least one of the peak values could not be extracted from the waveform obtained by the computing step when a transition portion of the waveform falls within a predetermined range during a predetermined lapse time without exceeding an upper limit and falling below a lower limit of the predetermined range during a predetermined lapse time, and determining that the brake system is NG even if at least one of the peak values could not be extracted from the waveform obtained by the computing step when a transition portion of the waveform falls within a predetermined range during a predetermined lapse time and also another transition portion exceeds an upper limit or falls below a lower limit of the predetermined range during a predetermined lapse time.

A brake system test device of a two-wheeled motor vehicle for testing the operation of a front-rear wheel interlock brake system provided on the two-wheeled motor vehicle having an antilock brake system, the device comprising:

• a pair of rotatable front wheel supporting rollers having axes arranged in parallel for supporting a front wheel of the two-wheeled motor vehicle;
• a pair of rotatable rear wheel supporting rollers having axes arranged in parallel for supporting a rear wheel of the two-wheeled motor vehicle;
• a measuring means connected to one of the front wheel support rollers and one of the rear wheel support rollers, respectively, for measuring a rotation speed of the front wheel and a rotation speed of the rear wheel, respectively, via each of the rollers;
• a computing means for computing, based on the values measured via the respective measuring means, when the front wheel and the rear wheel are rotated in an interlocked manner and the antilock brake system is operated respectively for the front wheel and the rear wheel, a waveform representing a difference between a speed change of the front wheel that occurs when the brake is initially turned off by the front wheel antilock brake system and the speed change of the rear wheel that occurs when the brake is initially turned off by the rear wheel antilock brake system, the waveform having peak values and transition portions which fall before and after the peak values;
• and
• a determination means for determining that the brake system is OK when the peak values of the waveform obtained by the computing means falls within predetermined ranges during predetermined lapse times, and determining that the brake system is OK even if at least one of the peak values could not be extracted from the waveform obtained by the computing means when a transition portion of the waveform falls within a predetermined range during a predetermined lapse time without exceeding an upper limit and falling below a lower limit of the predetermined range during a predetermined lapse time, and determining that the brake system is NG even if at least one of the peak values could not be extracted from the waveform obtained by the computing means when a transition portion of the waveform falls within a predetermined range during a predetermined lapse time and also another transition portion exceeds an upper limit or falls below a lower limit of the predetermined range during a predetermined lapse time.

A brake system test method of a two-wheeled motor vehicle for testing the operation of a front-rear wheel interlock brake system provided on the two-wheeled motor vehicle having an antilock brake system, the method comprising:

• a brake input step for rotating a front wheel of the two-wheeled motor vehicle supported by a pair of front wheel support rollers and rotating a rear wheel of the two-wheeled motor vehicle supported by a pair of rear wheel support rollers, and fully inputting the brake for one of the wheels in order to operate the antilock brake system and the front-rear wheel interlock brake system;
• a measuring step for measuring a rotation speed of the front wheel and a rotation speed of the rear wheel during the brake input step via respective support rollers;
• a computing step for computing, based on the measurements obtained in the measuring step, a waveform representing a difference between a speed change of the front wheel that occurs when the brake is initially turned off by the operation of the front wheel antilock brake system and a speed change of the rear wheel that occurs when the brake is initially turned off by the operation of the rear wheel antilock brake system, the waveform having peak values and transition portions which fall before and after the peak values;
• and
• a performance determination step for determining that the brake system is OK when the peak values of the waveform obtained by the computing step falls within predetermined ranges during predetermined lapse times, and determining that the brake system is OK even if at least one of the peak values could not be extracted from the waveform obtained by the computing step when a transition portion of the waveform falls within a predetermined range during a predetermined lapse time without exceeding an upper limit and falling below a lower limit of the predetermined range during a predetermined lapse time, and determining that the brake is NG even if at least one of the peak values could not be extracted from the waveform obtained by the computing step when a transition portion of the waveform falls within a predetermined range during a predetermined lapse time and also another transition portion exceeds an upper limit or falls below a lower limit of the predetermined range during a predetermined lapse time.