Abstract: Provided is a rubber bearing formed from a polychloroprene composition and having higher ozone resistance. The rubber bearing comprises a laminate prepared by alternately laminating a plurality of soft layers having rubber elasticity and a plurality of hard layers having rigidity, and a covering layer covering an outer peripheral part of the laminate. The soft layer comprises a rubber composition containing a polychloroprene, and the covering layer comprises a blend rubber composition containing 30 to 95 parts by mass of a polychloroprene and 70 to 5 parts by mass of an elastomer other than the polychloroprene.

Abstract: A plurality of electric control units are connected to perform data-communication through a communication line. Each electric control unit comprises a recording means for recording data and a communication means, to control an operation of an object to be controlled. One of the plurality of electric control units determines whether it is possible to record data in the recording means, and records the data in the recording means when it determines that it is possible to record the data in the recording means. The “one of the plurality of electric control units” transmits the data to other electric control unit when it determines that it is not possible to record the data in the recording means. The “other electric control unit” receives the transmitted data and records it in own recording means.

Abstract: A plurality of electric control units are connected to perform data-communication through a communication line. Each electric control unit comprises a recording means for recording data and a communication means, to control an operation of an object to be controlled. One of the plurality of electric control units determines whether it is possible to record data in the recording means, and records the data in the recording means when it determines that it is possible to record the data in the recording means. The “one of the plurality of electric control units” transmits the data to other electric control unit when it determines that it is not possible to record the data in the recording means. The “other electric control unit” receives the transmitted data and records it in own recording means.

Abstract: A system (apparatus and method) for measuring a revolution speed of a rotary member improves accuracy by estimating the speed during a unit operation period in response to pulse signals detected from the rotary member. When a pulse signal is not detected, the system obtains the revolution speed by selecting the lesser of a first estimated value and a second estimated value. The first estimated value is determined on the basis of the calculated revolution speed during the previous unit operation period and also the calculated acceleration during that previous operation period. The second estimated value is determined on the basis of a lapse time between a detected time of the last signal and the completion time of the current unit operation period.

Abstract: A traction control system, or an anti-lock brake system comprises a wheel behavior detecting system which comprises a coefficient calculating circuit for calculating, on the basis of output values from wheel speed detectors, a bad road coefficient A of representative of the road surface irregularity upon which the vehicle is moving, and a control variable filtering circuit for producing a filtered value Lm which exhibits a normal waveform when the bad road coefficient A is small and a filtered waveform when the bad road coefficient is great thereby keeping abrupt changes caused by the bad road from erroneously controlling the traction or antilock systems. With the wheel behavior detecting system used in the traction control system or the anti-lock brake system, a control command determining circuit responds to the output from the filtering circuit, that is, the control variable which has been modified, to determine the command necessary to control braking forces to be applied to the wheels.