SU765039A1

SU765039A1 - Mechanism for smooth engagement of vehicle transmission friction clutch

Info

Publication number: SU765039A1
Application number: SU782662098A
Authority: SU
Inventors: Леонид Григорьевич Красневский
Original assignee: Институт Проблем Надежности И Долговечности Машин Ан Белорусской Сср
Priority date: 1978-08-29
Filing date: 1978-08-29
Publication date: 1980-09-23

Description

Изобретение относится к транспортной технике, а конкретно — к устройствам управления многоступенчатыми трансмиссиями, в которых ступени переключаются посредством многодисковых фрикционных муфт с гидроцилиндрами.The invention relates to transport equipment, and in particular to multi-stage transmission control devices in which the stages are switched by means of multi-plate friction clutches with hydraulic cylinders.

Известен механизм плавного включения фрик- ⁵ционной муфты трансмиссии транспортного средства, содержащий регулятор давления рабочей жидкости с переменной настройкой, подключенный к напорной гидролинии гидроцилиндра включения фрикционной муфты, и поршневой гидроаккумулятор для изменения настройки регулятора, сообщенный с упомянутой гидролинией через дроссель (1]. Золотник регулятора и поршень аккумулятора расположены соосно в общем канале корпуса.Known soft start mechanism ⁵ frik- translational coupling a vehicle transmission comprising a hydraulic fluid pressure regulator with variable adjustment, connected to the pressure line of the hydraulic cylinder incorporating a friction clutch and piston accumulator for changing control parameters, said hydraulic line communicating with the through orifice (1]. Spool the regulator and the piston of the battery are located coaxially in the common channel of the housing.

Недостатками известного устройства являются большие габариты, определяемые потребным рабочим объемом аккумулятора, и трудоемкость^ изготовления, обусловленная большой длиной зеркала гильзы, в которой помещены золотник и поршень. Погрешности ее изготовления, а также засорение способны вызвать в эксплуатации заклинивание поршня аккумулятора, что снижает надежность механизма и трансмиссии в целом.The disadvantages of the known device are large dimensions, determined by the required working volume of the battery, and the complexity of manufacturing, due to the large length of the sleeve mirror in which the spool and piston are placed. Errors of its manufacture, as well as clogging, can cause jamming of the piston of the battery in operation, which reduces the reliability of the mechanism and transmission as a whole.

Цель изобретения — повышение надежности механизма плавности.The purpose of the invention is to increase the reliability of the smoothness mechanism.

Поставленная цель достигается тем, что механизм снабжен эжектором и двумя обратными клапанами, а аккумулятор давления выполнен в виде полости регулятора давления со стороны упругого элемента, при этом эжектор установлен в напорной гидролинии входом к регулятору, а упомянутая полость регулятора через первый обратный клапан сообщена с всасывающим каналом эжектора и через второй обратный клапан — с внутренней полостью трансмиссии, причем второй обратный клапан ориентирован входом в сторону указанной полости трансмиссии. А также тем, что регулятор снабжен мембраной, разделяющей его полость со стороны упругого элемента на две части, одна из которых со стороны упругого элемента сообщена со входом первого обратного клапана, а вторая часть полости, противоположная первой, сообщена с выходом второго обратного клапана и снаб жена дополнительным упругим элементом.This goal is achieved by the fact that the mechanism is equipped with an ejector and two check valves, and the pressure accumulator is made in the form of a cavity of the pressure regulator from the side of the elastic element, while the ejector is installed in the pressure hydraulic line with an entrance to the regulator, and the said cavity of the regulator is in communication with the suction valve through the first non-return valve the ejector channel and through the second non-return valve with the internal transmission cavity, the second non-return valve is oriented by the entrance towards the specified transmission cavity. And also the fact that the regulator is equipped with a membrane dividing its cavity from the side of the elastic element into two parts, one of which is connected from the side of the elastic element to the inlet of the first non-return valve, and the second part of the cavity opposite to the first is communicated with the output of the second non-return valve and wife an additional elastic element.

На фиг. 1 схематически изображен предлагаемый механизм плавного включения фрикционной муфты,- на фиг. 2 — вариант выполнения механизма; на фиг. 3 — графики изменения давления и расхода жидкости при включении муфты.In FIG. 1 schematically shows the proposed mechanism for the smooth inclusion of the friction clutch, - in FIG. 2 - embodiment of the mechanism; in FIG. 3 - graphs of changes in pressure and fluid flow when the coupling is turned on.

Механизм плавного включения (см. фиг. 1) имеет регулятор давления 1 с корпусом 2, в цилиндрическом отверстии 3 которого помещен затвор 4, а в левой полости, сообщенной с отверстием 3, упругий элемент (пружина) 5. Указанная полость служит также рабочей полостью аккумулятора. В затворе 4 имеется дроссель 6 | для заполнения аккумулятора. Через отверстие 7 регулятор давления гидролинией 8 подключен к гидроцилиндру 9 фрикционной муфты (на чертеже не показана) через эжектор 10. Всасывающий канал эжектора 10 гидролинией 11 через обратный клапан 12 сообщен с полостью аккумулятора в нижней ее части. Гидролиния 13 управления муфтой подключена к гидролинии 8. Полость аккумулятора через обратный клапан 14 и дроссель 15 сообщена также с внутренней полостью трансмиссии (на чертеже не показана). Опора 16 пружины 5, на внешней цилиндрической поверхности которой имеются прорези 17, служит одновременно дефлектором струи, вытекающей из дросселя 6. В корпусе 2 имеется сливное окно 18. Давление в гидролинию 13 подается от механизма управления трансмиссии, условно изображенного в виде подвода 19 рабочей среды.The soft start mechanism (see Fig. 1) has a pressure regulator 1 with a housing 2, in which a shutter 4 is placed in a cylindrical hole 3, and an elastic element (spring) 5 in the left cavity in communication with the hole 3. This cavity also serves as a working cavity battery. The shutter 4 has a throttle 6 | to fill the battery. Through the hole 7, the pressure regulator is connected by a hydraulic line 8 to the hydraulic cylinder 9 of the friction clutch (not shown in the drawing) through the ejector 10. The suction channel of the ejector 10 by the hydraulic line 11 through the check valve 12 communicates with the battery cavity in its lower part. The control line 13 of the clutch is connected to the hydraulic line 8. The cavity of the battery through the check valve 14 and the throttle 15 also communicates with the internal cavity of the transmission (not shown). The support 16 of the spring 5, on the outer cylindrical surface of which there are slots 17, serves simultaneously as a deflector of the jet flowing from the throttle 6. In the housing 2 there is a drain window 18. The pressure in the hydraulic line 13 is supplied from the transmission control mechanism, conventionally shown as a supply 19 of the working medium .

В варианте механизма (см. фиг. 2) эластичная мембрана 20 отделяет полость аккумулятора, заполняемую жидкостью, через дроссель 6 от воздушной полости, в которой также может устанавливаться дополнительный упругий элемент (пружина) 21 для возврата мембран 20 в исходное положение.In a variant of the mechanism (see Fig. 2), the elastic membrane 20 separates the battery cavity filled with liquid through the throttle 6 from the air cavity, in which an additional elastic element (spring) 21 can also be installed to return the membranes 20 to its original position.

Механизм работает следующим образом. Для включения фрикционной муфты рабочую жидкость под давлением ₽_пит подают в гидроцилиндр 9 по гидролинии 13 от механизма управления трансмиссией. Включение муфты происходит в три этапа.The mechanism works as follows. To turn on the friction clutch, the working fluid under pressure ₽ _{pit is} fed into the hydraulic cylinder 9 via hydraulic line 13 from the transmission control mechanism. The clutch engages in three stages.

I этап. Перемещение поршня гидроцилиндра 9. При подаче давления поршень гидроцилиндра 9 перемещается вниз, пока не выберутся зазоры между дисками муфты. На этом этапе в гидроцилиндре 9 устанавливается низкое давление Pj, зависящее только от сил сопротивления движению поршня. На затвор 4 регулятора давления 1 справа действует давление, превышающее Р| на величину гидравлического сопротивления эжектора 10.. Однако этого давления недостаточно для преодоления усилия пружины 5 и смещения затвора 4, так что сливное окно 18 перекрыто. Весь расход жидкости Qr, поступающей в гидролинию 13, проходит через ежектор 10 в гидроцилиндр 9. При прохождении расхода жидкости Qr во всасывающем канале эжектора 10 создается разрежение, под действием которого жидкость удаляется из полости аккумулятора через обратный клапан 12 по гидролинии 11, а вместо нее в полость аккумулятора поступает воздух из' внутреннего объема трансмиссии через дроссель 15 и обратный клапан 14. Небольшое количество жидкости, поступающей в полость через дроссель 6, также отсасывается. Вследствие малого сечения дросселя 15 в полости аккумулятора создается разряжение.I stage. Moving the piston of the hydraulic cylinder 9. When applying pressure, the piston of the hydraulic cylinder 9 moves down until the gaps between the clutch disks are selected. At this stage, a low pressure Pj is established in the hydraulic cylinder 9, which depends only on the resistance forces to the movement of the piston. On the shutter 4 of the pressure regulator 1 on the right is a pressure greater than P | by the hydraulic resistance of the ejector 10 .. However, this pressure is not enough to overcome the force of the spring 5 and the displacement of the shutter 4, so that the drain window 18 is closed. The entire flow rate of the liquid Qr entering the hydraulic line 13 passes through the lector 10 into the hydraulic cylinder 9. When the flow rate of the liquid Qr passes through the suction channel of the ejector 10, a vacuum is created under the action of which the liquid is removed from the accumulator cavity through the check valve 12 via the hydraulic line 11, and instead air enters the cavity of the accumulator from the 'internal volume of the transmission through the throttle 15 and the check valve 14. A small amount of liquid entering the cavity through the throttle 6 is also sucked out. Due to the small cross section of the inductor 15, a vacuum is created in the cavity of the battery.

Таким образом, на данном этапе через эжектор 10 проходит расход Q_r на заполнение гидроцилиндра 9, расход через регулятор давления равен нулю, а давления в гидроцилиндре и в полости аккумулятора соответствуют кривым Р_г и Р_а (см. фиг. 3).Thus, at this stage, the flow rate Q _r for filling the hydraulic cylinder 9 passes through the ejector 10, the flow rate through the pressure regulator is zero, and the pressures in the hydraulic cylinder and in the accumulator cavity correspond to the curves P _g and P _a (see Fig. 3).

Ц этап. Нарастание давления в гидроцилиндре 9.C stage. Pressure build-up in the hydraulic cylinder 9.

При остановке поршня гидроцилиндра 9 в результате сжатия им пакета дисков муфты течение жидкости через эжектор 10 прекращается, и давление в его всасывающем канале уравнивается с давлением Р_г в гидроцилиндре. Орратный клапан 12 закрывается, и давление воздуха Р_а в полости аккумулятора начинает возрастать в результате поступления в нее жидкости через дроссель 6. При этом также закрывается обратный клапан 14, и полость аккумулятора остается сообщенной с гидросистемой только через дроссель 6. Давление в гидролиниях 8, 11, 13 начинает нарастать.When the piston of the hydraulic cylinder 9 stops as a result of compression of the package of clutch disks by it, the fluid flow through the ejector 10 stops, and the pressure in its suction channel is equalized with the pressure P _g in the hydraulic cylinder. The pressure valve 12 closes, and the air pressure P _a in the accumulator cavity begins to increase as a result of the liquid entering it through the throttle 6. This also closes the check valve 14, and the accumulator cavity remains in communication with the hydraulic system only through the throttle 6. Pressure in the hydraulic lines 8, 11, 13 begins to increase.

При достижении некоторого давления, несколько превышающего Р^ и определяемого настройкой пружины 5, затвор 4 смещается влево и открывает сливное окно 18. Через регулятор давления 1 на слив протекает расход Q_p, изменение которого во времени показано на фиг. 3. В гвдроцилиндре 9 и сообщенных с ним гидролиниях устанавливается давление, равное давлению настройки регулятора 1. Из условия равновесия сил на затворе 4 следует, что на данном этапеUpon reaching a certain pressure slightly exceeding P ^ and determined by the setting of the spring 5, the shutter 4 moves to the left and opens the drain window 18. Through the pressure regulator 1, the flow Q _p flows to the drain, the change of which is shown in FIG. 3. In the hydraulic cylinder 9 and the hydraulic lines connected with it, a pressure is set equal to the pressure of adjustment of the regulator 1. From the condition of balance of forces on the shutter 4 it follows that at this stage

Р_г = Р_а + ΔΡ, ΔΡ =-Ьгде F - усилие пружины. 5; S - площадь торца затвора 4.P _r = P _a + ΔΡ, ΔΡ = - where F is the spring force. 5; S is the area of the end face of the shutter 4.

Таким образом, кривая изменения давления в гидроцилиндре 9 аналогична кривой Р , но смещена относительно нее на величину Р.Thus, the pressure change curve in the hydraulic cylinder 9 is similar to curve P, but shifted relative to it by the value of R.

Время и характер нарастания давления в полости аккумулятора определяются ее объемом, сечением дросселя 6 и закономерностью сжатия воздуха жидкостью. Обеспечению стабильности характеристик аккумулятора способствует дефлектор 17, препятствующий распылению в его полости струи жидкости, выходящей из дросселя 6, и ее хаотическому перемешиванию с воздухом. Объем аккумулятора и сечение дросселя 6 выбираются индивидуально в зависимоети от параметров конкретной муфты.The time and nature of the increase in pressure in the cavity of the battery is determined by its volume, the cross section of the throttle 6 and the pattern of compression of air by a liquid. Ensuring the stability of the characteristics of the battery contributes to the deflector 17, which prevents the spray in its cavity of a jet of liquid exiting the throttle 6, and its chaotic mixing with air. The volume of the battery and the cross section of the inductor 6 are selected individually depending on the parameters of a particular coupling.

Ц этап заканчивается, когда давление в гидроцилиндре 9 достигает величины давления питания Р_пит Давление в полости аккумулятора быстро уравнивается с давлением в гидроцилиндре 9, и пружина 5 смещает затвор 4 вправо до упора.C stage ends when the pressure in the hydraulic cylinder 9 reaches the value of the supply pressure P _{pit. The} pressure in the accumulator cavity is quickly equalized with the pressure in the hydraulic cylinder 9, and the spring 5 shifts the shutter 4 to the right to the stop.

ΙΠ. этап. Работа включенной муфты.ΙΠ. stage. Clutch engagement.

При выравнивании давлений по обе , стороны затвора 4 последний перекрывает сливное окно 18, и регулятор 1 прекращает работу. Давление в гидроцилиндре 9, а также во всех гидролиниях механизма плавности уравнивается с давлением питания Р_[ШТ Аккумулятор остается заряженным (давления воздуха и жидкости в его полости равны ) Если имеются утечки воздуха из аккумулятора, то он постепенно запол·) няется жидкостью полностью, что не влияет на дальнейшую работу муфты.When the pressure is equalized on both sides of the shutter 4, the latter closes the drain window 18, and the regulator 1 stops working. The pressure in the hydraulic cylinder 9, as well as in all the hydraulic lines of the smoothness mechanism, is equalized with the supply pressure P _{[ШТ. The} battery remains charged (air and liquid pressures in its cavity are equal). If there are air leaks from the accumulator, then it gradually fills ·) completely with liquid, which does not affect the further operation of the coupling.

В случае отказа обратного клапана 14 воздух в начале Ц этапа будет вытеснен жидкостью из полости аккумулятора, и далее жидкость из этой полости будет сливаться во внутреннюю полость трансмиссии через дроссель 15. При этом длительность [I этапа значительно уменьшится. Однако благодаря наличию дросселя 15 в полости аккумулятора установится некоторое давление, за счет которого давление настройки регулятора 1 и давление в гидроцилиндре 9 всё же возрастут до величины, обеспечивающей включение муфты. Конкретное значение этой величины зависит от соотношения сечений дросселей б и 15 и выбирается, исходя из соображений надежности для конкретной муфты. _ Следует отметить, что утечки воздуха на П этапе включения могут иметь место только через обратный клапан 14. Утечки по кольцевому зазору между затвором 4 и корпусом 2 невозможны, так как давление в полости аккумулятора меньше давления справа от затвора на величину ΔΡ (см. выше).In the event of a failure of the check valve 14, the air at the beginning of the stage C will be displaced by the liquid from the cavity of the accumulator, and then the liquid from this cavity will merge into the internal cavity of the transmission through the throttle 15. In this case, the duration of stage I will be significantly reduced. However, due to the presence of a throttle 15, a certain pressure is established in the accumulator cavity, due to which the pressure of adjustment of the regulator 1 and the pressure in the hydraulic cylinder 9 nevertheless increase to a value ensuring the inclusion of the clutch. The specific value of this value depends on the ratio of the cross sections of the chokes b and 15 and is selected based on reliability considerations for a particular coupling. _ It should be noted that air leaks at stage P of switching on can take place only through the check valve 14. Leaks in the annular gap between the shutter 4 and the housing 2 are not possible, since the pressure in the accumulator cavity is less than the pressure to the right of the shutter by ΔΡ (see above) )

Исключению утечек жидкости через неисправный клапан 14 из полости аккумулятора способствует применение мембраны 20, разделяющей его полость на воздушную и жидкостную (см. фиг. 2). При этом отпадает необходимость в дефлекторе 16 и дросселе 15. Возврат мембраны 20 из рабочего положения, показанного пунктиром, в исходное осуществляется за счет разрежения в полости справа от нее на I этапе работы механизма. Дополнительно может использоваться возвратная пружина 21.The elimination of fluid leaks through the faulty valve 14 from the cavity of the battery contributes to the use of the membrane 20, dividing its cavity into air and liquid (see Fig. 2). This eliminates the need for a deflector 16 and a throttle 15. The return of the membrane 20 from the operating position, shown by the dotted line, to its original position is carried out due to rarefaction in the cavity to the right of it at the first stage of the mechanism. Additionally, a return spring 21 can be used.

Преимуществом предлагаемой, конструкции механизма плавности является значительное (в 3-4 раза) уменьшение длины зеркала гильзы регулятора 1, которая в данном случае примерно равна длине затвора 4, а также усилия и габаритов пружины 5. Соответственно уменьшаются и габариты корпуса 2, так как необходимый объем аккумулятора можно выполнить в боковой крышке корпуса. При этом полость ₅ аккумулятора может иметь сложную форму, так как эжектор 10 в любом случае обеспечит отсос из нее жидкости. В поршневых же аккумуляторах рабочий объем равен объему, описываемому поршнем, т.е. рассчитывается по зерка10 лу гильзы.The advantage of the proposed design of the smoothness mechanism is a significant (3-4 times) reduction in the length of the mirror of the sleeve of the regulator 1, which in this case is approximately equal to the length of the shutter 4, as well as the force and dimensions of the spring 5. Accordingly, the dimensions of the housing 2 are also reduced, since the necessary Battery capacity can be done in the side cover of the case. In this case, the cavity _{5 of the} battery may have a complex shape, since the ejector 10 in any case will ensure the suction of the liquid from it. In piston batteries, however, the working volume is equal to the volume described by the piston, i.e. calculated from the mirror 10 of the liner.

Учитывая малый расход жидкости во всасывающем канале, эжектор 10 может иметь малые размеры и практически может выполняться в виде сверлений в корпусе 2. Клапаны 12 и 14 15 также легко размещаются в корпусе, так что механизм при его реализации представляет собой единый компактный блок.Given the low flow rate of the liquid in the suction channel, the ejector 10 can be small in size and practically can be drilled in the housing 2. Valves 12 and 14 15 are also easily placed in the housing, so that the mechanism in its implementation is a single compact unit.

Claims

FIG. 1 shows schematically the proposed mechanism for the smooth friction clutch engagement; in fig. 2 shows an embodiment of the mechanism; in fig. 3 shows graphs of pressure and flow rates when the clutch is turned on. The soft start mechanism (see Fig. 1) has a pressure regulator 1 with a housing 2, in a cylindrical bore 3 of which a shutter 4 is placed, and in the left cavity communicated with bore 3, an elastic element (spring) 5. The said cavity also serves working cavity of the battery. Gate 4 has a throttle 6 for filling the battery. Through a port 7, a pressure regulator is connected by hydroline 8 to a hydraulic cylinder 9 of a friction clutch (not shown) through the ejector 10. The suction channel of the ejector 10 by hydraulic line 11 through the return valve 12 communicates with the cavity of the battery in its lower part. The hydroline 13 of the clutch control is connected to the hydroline 8. The cavity of the battery through the check valve 14 and the throttle 15 is also in communication with the internal transmission cavity (not shown). The support 16 of the spring 5, on the outer cylindrical surface of which there are slots 17, serves simultaneously as a deflector of the jet flowing out of the throttles 6. The case 2 has a drain window 18. Pressure is supplied to the hydraulic line 13 from the transmission control mechanism conventionally depicted as a working medium supply 19 . In the variant of the mechanism (see Fig. 2), the elastic membrane 20 separates the cavity of the battery filled with liquid through the throttle 6 from the air cavity, in which an additional elastic element (spring) 21 can also be installed to return the membranes 2 of the initial position . The mechanism works as follows. To activate the friction clutch, the working fluid under pressure P is fed to the hydraulic cylinder 9 by hydraulic line 13 from the transmission control mechanism. The inclusion of the coupling occurs in three stages. Stage I Moving the piston of the hydraulic cylinder When the pressure is applied, the cylinder of the hydraulic cylinder 9 moves downward until gaps between the clutch plates are selected. At this stage, a low pressure Pj is established in the cylinder 9, depending only on the forces of resistance to the movement of the piston. The pressure regulator 1 on the right-hand side of pressure gauge 4 acts above the PI on the hydraulic resistance of the ejector 10. However, this pressure is not enough to overcome the force of the spring 5 and move the valve 4 so that the drain window is closed. All the flow rate Qr entering the hydroline 13 passes through the ejector 10 into the idrocyliidr 9. As the flow rate Qr passes through the suction channel of the ejector 10, a vacuum is created, under which the fluid is removed from the battery cavity through the check valve 12 through the hydroline 11, instead, air flows from the internal volume of the transmission through the throttle 15 and the non-return valve 14 into the cavity of the battery. A small amount of fluid entering the cavity through the throttle 6 is also drawn off. Due to the small cross section of the throttles 15, a discharge is created in the cavity of the battery. Thus, at this stage, Q flows through the ejector 10, to fill the hydraulic cylinder 9, the flow through the pressure regulator is zero, and the pressures in the hydraulic cylinder and in the battery cavity correspond to the PJ and P curves (see Fig. 3). C stage. The pressure build-up in the hydraulic cylinder 9. When the hydraulic cylinder 9 s stops, the compression of the clutch disk package stops the flow of fluid through the ejector 10, and the pressure in its suction channel is equalized with the pressure Pj in the hydraulic cylinder. The valve 12 is closed, and the air pressure P in the cavity of the battery begins to increase as a result of fluid entering through the throttle 6. The check valve 14 also closes and the cavity of the battery remains communicated with the hydraulic system only through the throttle 6. Hydraulic pressure 8, 11, 13 begins to increase. When a certain pressure is reached, slightly exceeding P and determined by the setting of the spring 5, the shutter 4 is displaced to the left and opens the drain window 18. The flow rate O flows through the pressure regulator I to the drain, the change in which is shown in time in FIG. 3. In the hydraulic cylinder 9 and the hydraulic stations communicated with it, a pressure is set equal to the pressure of the setting of the regulator 1. It follows from the condition of equilibrium of the forces at the gate 4 that at this stage Р Р + ДР, ДР 1гаэ where F is the spring force. five; S is the end face area of the gate 4. Thus, the pressure change curve in the hydraulic cylinder 9 is similar to the P curve, but is shifted relative to it by the value of P. The time and nature of the pressure build-up in the battery cavity are determined by its volume, cross section of the throttle 6 and air compression pattern . The stability of the characteristics of the battery is facilitated by the deflector 17, which prevents the jet of liquid emerging from the throttles 6 from being sprayed into its cavity and that it is chaotically mixed with air. The volume of the battery and the cross section of the throttles 6 are selected individually, depending on the parameters of the particular coupling. The stage ends when the pressure in the hydraulic cylinder 9 reaches the value of the supply pressure P The pressure in the cavity of the battery quickly equalizes with the pressure in the hydraulic cylinder 9, and the spring 5 displaces the shutter 4 to the right of the stop. Ijj stage. Work included clutch. When equalizing the pressures on both sides of the gate 4, the latter closes the drain window 18, and the regulator 1 stops operation. The pressure in the hydraulic cylinder 9, as well as in all the hydrolines of the smoothness mechanism, is equalized with the supply pressure P The accumulator remains -charged (the pressures of air and fluid in its cavity are equal to P ") If there are leakages from the accumulator, the accumulator gradually fills completely, which does not affect the further operation of the coupling. In case of failure of the check valve 14, the air at the beginning of the C stage will be forced out of the battery cavity by the fluid, and then the fluid from this cavity will be drained into the internal transmission cavity through the throttle 15. At the same time, the duration of the C stage will be significantly reduced. However, the presence of throttles 15 in the cavity The accumulator will be set to a certain pressure, due to which the adjustment pressure of the regulator 1 and the pressure in the hydraulic cylinder 9 will nevertheless increase up to the value ensuring the clutch engagement. The specific value of this value depends on the ratio of the choke cross sections and 15 and is selected based on reliability considerations for a particular coupling. It should be noted that air leaks on the AND stage of switching-on can take place only through the non-return valve 14. The leakage through the annular gap between the shutter 4 and the housing 2 is impossible, since the pressure in the battery cavity is less than the pressure to the right of the shutter by the value of DG (see above ). The elimination of fluid leakage through the faulty valve 14 from the battery cavity is promoted by the use of a membrane 20 that divides its cavity into air and liquid (see Fig. 2). In this case, there is no need for the deflector 16 and the throttle 15. The return of the membrane 20 from the working position shown by the dotted line to the initial one is due to the vacuum in the cavity to the right of it at the first stage of the mechanism. Additionally, a return spring 21 can be used. The advantage of the proposed design of the smoothness mechanism is a significant (by a factor of 3-4) reduction in the length of the mirror of the sleeve of the regulator 1, which in this case is approximately equal to the length of the bolt 4, as well as the force and dimensions of the spring 5. Accordingly, the dimensions of the housing 2 are reduced, since the required volume of the battery can be performed in the side housing. In this case, the cavity of the battery may have a complex shape, since the ejector 10 in any case will provide suction of fluid from it. In piston batteries, the working volume is equal to the volume described by the piston, i.e. calculated by the liner mirror. Taking into account the low flow rate in the suction channel, the ejector 10 can be small in size and can practically be made in the form of drillings in the housing 2. The valves 12 and 14 are also easily placed in the housing, so that the mechanism in its implementation is a single compact unit. Claims I. A friction clutch mechanism for a vehicle transmission containing a pressure regulator with variable setting, connected to the pressure hydraulic line of the friction clutch actuator hydraulic cylinder, and a pressure accumulator for changing the pressure regulator setting communicated with the hydraulic line through the throttle characterized in that, in order to increase its reliability, it is equipped with an ejector and two check valves, and the pressure accumulator is designed as a control cavity the pressure of the coil side of the elastic element; the ejector is installed in the pressure hydraulic line by the inlet to the pressure regulator of the working fluid, and the cavity of the pressure regulator is connected to the suction channel of the ejector through the first non-return valve , and the second check valve is oriented inlet in the direction of the specified transmission cavity.

2. The mechanism according to claim 1, characterized in that a membrane is installed in the cavity of the pressure regulator, which divides this cavity into two parts, one of which is connected to the inlet of the first check valve on the side of the elastic element, and the second part of the cavity opposite to the first, communicated with the outlet of the second check valve.

3. The mechanism according to claim 2, of which is that in the second specified part of the cavity of the pressure regulator an additional elastic element is installed. Sources of information taken into account in the examination 1. US patent N 3691872, cl. 74-864, 1974. V V V V V .V ///// Y ////// Z

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