摘要:
A non-asbestos friction material comprising mica powder adhered with aluminum phosphate and then subjected to a heating treatment, a friction modifier and a thermosetting resin binder is disclosed. The material is used for brake linings and clutch facings for cars and industrial machinery.
摘要:
A ring-shaped friction element (1) for operating in oil provided with a plurality of oil containers (2) at an inner peripheral portion thereof and a plurality of grooves (3) communicating between the oil containers and an outer periphery of the friction element.
摘要:
A ring-shaped friction element (1) for operating in oil provided with a plurality of oil containers (2) at an inner peripheral portion thereof and a plurality of grooves (3) communicating between the oil containers and an outer periphery of the friction element.
摘要:
A process for producing a friction material under low-temperature conditions using, as a reinforcement, one or more fibers selected from a metal fiber, an organic fiber and an inorganic fiber and, as a binder, a compounded pitch that consists of a mesophase pitch and sulfur and/or an aromatic nitro compound. The content of an optically anisotropic phase in the mesophase pitch is at least 80% and the softening point of the mesophase pitch is not higher than 270°C. The friction material produced exhibits consistent friction characteristics over a broad temperature range.
摘要:
A road surface friction coefficient estimating method and apparatus in an anti-lock control device for preventing locking of vehicle wheels during braking. The a road surface friction coefficient is estimated by comparing a deceleration of an estimated vehicle speed with a predetermined threshold value. The predetermined threshold value has different road surface friction coefficient values corresponding to different vehicle deceleration values. The braking hydraulic pressure is then repeatedly varied in accordance with signals indicative of the estimated road surface friction coefficient, signals indicative of the estimated vehicle speed, and one of the signals indicative of the slowest rear wheel speed and the front wheel speeds.
摘要:
An anti-lock control method and apparatus is characterized in that if the highest one VwH of the speeds of the four wheels of the vehicle is still lower than a prescribed threshold speed and not increasing at a second time point at which a prescribed time ΔT has elapsed after a first time point at which the highest wheel speed becomes lower than the threshold speed, the estimated vehicle speed is modified to be equal to the highest wheel speed VwH, thereby preventing an automotive vehicle from being not braked at the start of anti-lock control immediately after an estimated vehicle speed has changed away from the actual vehicle speed as the wheel of the vehicle performs an acceleration slip before the start of the anti-lock control.
摘要:
In an anti-lock control arrangement for preventing locking of vehicle wheels, a prescribed speed difference of a threshold speed from an estimated vehicle speed is changed from an initial value of the difference to a larger value when a wheel speed has been lower for a prescribed time than the threshold speed which follows the estimated vehicle speed with the prescribed speed difference therefrom or when a prescribed statement with respect to the wheel speed is repeated at a predetermined number. Further, the speed difference of the threshold speed from the estimated vehicle speed is changed back to the initial value when the wheel speed has become lower than the threshold speed subjected to the former change.