畢業(yè)設計(論文)外文文獻翻譯要求及封面-預覽頁
【正文】 ions.In heavyduty bination vehicles, air is the clear choice because of the large volume of liquid that would be needed to acadia all the wheel cylinders.hydraulicfeel — that is, as the pedal is pressed farther down, effort increases。 Less initial expense, due to smaller and fewer ponents。brakeshydraulicpressure,shoes against the insides of the drums.Therefore, the retarding horsepower generated by thelinings against the drums or discs, and to achieve controlled deceleration, it is necessary to multiply the original force applied at thesystem is used, the only mechanical leverage is in the foot pedal linkage.For example, if one wheelcylinder piston has an area of 2 square inches, and another piston has an area of 1 square inch, and the system pressure is 400 psi, the 2squareinch piston will push against the brakeThis translates into a longer mastercylinder stroke.If the master cylinder bore diameter is increased and the applying force remains the same, less pressure will be developed in the system, but a larger wheelcylinder piston can be used to achieve the desired pressure at the wheel cylinder.One mastercylinder piston and reservoir is used to actuate theon the other axle(s).Of course, the vehicle shouldn39。hydraulichydraulicbrakebrakefluid, without an undue increase in pedal effort.Other types of boosters usebrakehydraulicsystem pressure.VALVINGValves monly found inThese restrict a percentage ofwhen system pressure reaches a preset high value. This improves front/rearThat is, they adjust rearbrakehydraulic Metering valves.brakeon slippery surfaces under light braking applications.systems.The lever forces theThese are springengaged, but are disengaged byare used on the rear wheels to preserve braking stability when these vehicles are lightly loaded.hydraulicare applied, the control box senses the decrease in rear wheel speed, and activates the dump valve(s) if the rate of deceleration exceeds a predetermined limit.The control box energizes the dump valve with a series of rapid pulses to bleedoff wheelNormalinbrakesbrakeThis results in higher liningtodrum pressure than would be produced by the wheel cylinder alone.Asbrakeshoes.In addition to being one of the friction elements, theThe heavier a drum or rotor is, the more heat it can hold.This is important, since the hotter theAs a rule, highquality linings will display less heat fade than inferior ones.brakesbrakes.brakes, with their smaller friction surfaces and high clamping forces, do a good job of wiping water from rotors, and display little reduction in stopping capability when wet.有用的產(chǎn)品氣動鋼瓶
數(shù)學相關推薦
鄂ICP備17016276號-1