摘要:
A hydraulic pressure control valve assembly for a hydraulic brake system for a wheeled vehicle, comprises a proportioning valve having a plunger which is axially movable in a direction against a spring in response to application of a hydraulic pressure to a fluid inlet port to control the magnitude of hydraulic pressure in a fluid outlet port, and a deceleration sensing valve responsive to a deceleration of the vehicle the degree of which exceeds a predetermined value. The deceleration sensing valve has a piston which supports an end of the spring and is sealingly disposed in a chamber to define a sealed expandable chamber which is communicable with the fluid inlet port to enable the expandable chamber to contain a fluid the pressure of which is changeable in accordance with the degree of the deceleration of the vehicle. Biasing means is arranged in the valve assembly to bias the plunger to move axially in the other direction when the magnitude of hydraulic pressure in the sealed expandable chamber exceeds a predetermined value causing the piston to move toward the plunger beyond a predetermined distance against the spring.
摘要:
A stop locks an expansion valve of the anti-skid device in a position in which the expansion valve provides communication between a first passage located upstream of the expansion valve and a second passage interconnecting the expansion valve and a bypass valve during air bleeding, and an air bleed provides communication between the second passage and the atmosphere.
摘要:
A check valve is integrally formed on one end of an expansion valve slidably disposed in a first stepped bore and arranged to cut communication between the master cylinder and the brake units upon the pressure of the hydraulic fluid biasing the expansion valve to a first normal position being reduced due to either a signal from a computing circuit indicating a dangerously high rate of deceleration or cessation of the supply of pressurized hydraulic fluid. The movement of the expansion valve from its normal position permits the fluid in the brake units to pressure reducingly expand. A differential valve integrally connected to a by-pass valve maintains a fail safe pressure transmission path closed until cessation of the supply of pressurized fluid whereupon the master cylinder is directly connected with the brake units and a regulator valve slidably disposed in a third stepped bore formed in the by-pass valve is responsive to the change of both the master cylinder pressure and the supplied pressurized fluid to modulate the pressure biasing the expansion valve to its normal position.
摘要:
An anti-skid device is provided with valving which establishes a first normal pressure transmission path between the master cylinder and the wheel brake cylinders via which an anti-skid pressure reduction can be effected to prevent lock up of the wheels and a second fail safe pressure transmission path which is established in place of the first path upon a malfunction or the like in a source of hydraulic pressure associated with the anti-skid device. The valving is characterized by a valve which is held open (establishing the first pressure transmission path) by abutment with a spool formed with a bore therein. The bore is closed at this time by the stem of the valve which seats in the mouth thereof until the spool moves in response to pump failure or the like to first allow the valve to seat (closing the first path) and subsequently move sufficiently to bring the stem out of contact with the bore mouth (opening the second fail safe path without overlap with the first).
摘要:
In the case of pump failure a spool valve instantly connects a pressurized fluid accumulator with the servo motor which assistingly activates the master cylinder and isolates a power steering mechanism fluidly connected to the servo motor so that only the power brake is temporarily operable but with stepwise decreasing effectiveness.
摘要:
A disc brake comprises a yoke which transmits the force developed by the piston to the indirectly actuated friction pad of the brake. The yoke has an indirectly actuated friction pad contacting bent edge which is arc-shaped and which bears along the edge thereof on the indirectly actuated friction pad so as to cause the contacting bent edge to firmly urge the indirectly actuated friction pad into a braking function during brake application.
摘要:
There is provided a multilayered spectroscopic device effective to achieve in a short length of time the highly accurate fluorescent X-ray analysis of boron wherein the influence that may be brought about by the interfering X-rays and the background is sufficiently reduced and the strength of reflection of B-K&agr; line is sufficient. In this multilayered spectroscopic device 3, lanthanum (La), an alloy containing lanthanum as a principal component or lanthanum oxide (La2O3) is used for the reflecting layers 31 and boron is used for the spacer layers 32 and the periodic length d is chosen to be within the range of 7 to 14 nm and the film thickness ratio of the reflecting layers 31 to the spacer layers 32 is chosen to be within the range of 2/3 to 3/2. It has a total laminated film thickness t of a value sufficient to allow the strength of reflection of B-K&agr; line to be equal to or higher than 98% of a saturation value.
摘要翻译:提供了一种有效地在短时间内实现硼的高精度荧光X射线分析的多层光谱装置,其中可能由干扰X射线和背景引起的影响被充分降低,并且强度 B-Kalpha线的反射就足够了。 在该多层光谱装置3中,使用镧(La),以镧作为主要成分的合金或氧化镧(La 2 O 3)的合金,将反射层31用于间隔层32,将周期长度d选为 在7〜14nm的范围内,反射层31与间隔层32的膜厚比选择在2/3〜3/2的范围内。 其总层压膜厚度t的值足以使B-Kalpha线的反射强度等于或高于饱和值的98%。
摘要:
A method of measuring a distortion of a transmitting beam, characterized in that a transmitting beam is emitted from a beam generator and projected onto a screen as a bright spot, the bright spot is scanned over a surface of the screen, and a distortion of the transmitting beam is measured on the basis of a distance between a first location of the bright spot on the screen at a first time when the transmitting beam is incident on a beam receiving device in a specified incident direction upon transmitting through a measured body, and a second location of the bright spot on the screen at a second time when the transmitting beam is incident on the beam receiving device in the specified incident direction upon not transmitting through the measured body. A surface shape of a three-dimensional object may also be measured on the basis of a distance between a first location of the bright spot on the screen at a first time when the transmitting beam is incident on a beam receiving device in a specified incident direction upon being reflected from a surface of a three-dimensional measured body, and a second location of the bright spot on the screen at a second time when the transmitting beam is incident on the beam receiving device in the specified incident direction upon being reflected from a surface of a reference body. The present invention provides measurements having improved accuracy for objects of any size irrespective of the resolution of the beam receiving device.
摘要:
An enclosed space which constitutes part of an operating chamber of a cylinder is left between a piston and the bottom of the cylinder or between a piston and another piston when the piston is brought into contact with the bottom or the other piston. At least one groove or recess is formed in either the piston or the bottom, or in either the piston or the other piston so that communication between the enclosed space and a fluid port of the cylinder is not blocked even when the piston is brought into contact with the bottom or the other piston.
摘要:
There is proved a driving force control system which comprises device for measuring operating state of the vehicle brake system and generating an output signal, and device for controlling a driving force upon a predetermined condition being fulfilled after the output signal has indicated a predetermined operating state of the vehicle brake system.