• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A transfer valve assembly controls the change-over in the supply of pressurized fluid to a steering servomotor from engine driven and vehicle driven pumps. The outflow rate of fluid from the engine driven pump is metered to control shift of the transfer valve assembly between its two operating positions preventing any delay or overlap in the change-over between pumps because of low or residual output pressure from the engine driven pump.
    公开号:SU873870A3
    申请号:SU782637550
    申请日:1978-07-14
    公开日:1981-10-15
    发明作者:Яблонски Эрих
    申请人:Цанрадфабрик Фридрихсхафен Аг (Фирма)；
    IPC主号:
    专利说明:

    (54) CAR STEERING SYSTEM
    one
    FIELD OF THE INVENTION The invention relates to the automotive industry, namely to automobile steering systems.
    The known steering system of an automobile is a steering wheel, containing a control valve, kinematically connected with the steering wheel and hydraulically - with an executive hydraulic cylinder and with an additional distributor divider, a hydraulic pump driven by the engine of the car, hydraulically connected with the first tank and an emergency a hydraulic pump driven by the wheels of a car and hydraulically connected with the second tank, both of which are mentioned hydraulic pumps sv zash, with an additional distributor II The disadvantage of this system is low level ce reliability of connection is not possible .l avariynogg pump at a residual danlenii in hydraulic pumps driven by the engine .25
    The purpose of the invention is to increase the reliability of the system.
    权利要求:
    Claims (3)
    [1]
    This goal is achieved by the fact that the additional distributor is made in the form of a housing with an axial bore in which the supporting piston is installed in the housing by means of a stop ring, the main and additional spools, with the first spring located between the main spool and the supporting piston, and An additional spring is fitted with a second spring, and in the case with the possibility of interaction, two packs are installed with both the mentioned spools on the sides opposite to the action of the springs. polar fingers, while end member cavity formed by the housing and the slide valve further connected to the hydraulic pump, prinodimym of vehicle wheels, and Tortsov cavity formed by the housing and coupled to the spool esnopchym. The hydraulic pump, Gidriodim1 1m from the engine ashO3 mobile, and the cavity formed by the main spool and the supporting piston is connected to the actuating hydraulic cylinder through the throttle, while the additional spool is made with an end protrusion with the possibility of a vza. and with a supporting piston, and the reclining thrust fingers are made in the form of electrical contact pins. FIG. 1 shows a longitudinal section of the distributor and a hydraulic diagram of the steering system with hydraulic pumps inoperative; in fig. 2 is a partial section of the distributor; in fig. 3 shows the distributor in the normal position while the vehicle is moving; in FIG. 4 - distributor after termination of the hydraulic pump operation, driven by the engine of the car; in fig. 5 is a schematic diagram of the steering control. The main valve spool 2, the supporting piston 3 and the additional spool A. Tortsova side 5 of the main spool 2 are directed towards the front cavity 6, which is connected to the first circuit by hydraulic valve 7, in the hole, the body I of the additional distributor coaxially. consisting of a hydraulic pump 8, conducted from the engine connected by hydroline 9 to the tank tank 10 and from the pressure control valve 11. The end face 12 of the additional spool 4 forms the end cavity 13, which by means of the hydroline 14 is connected to a second circuit consisting of an emergency hydraulic pump 15, a second tank 16 and a valve - pressure limiter 1. Due to the pressure limiting valves 11 and 17 of both circuits, the maximum allowable pressure is limited. A first spring 18 is placed between the main spool 2 and the support piston 3, which in the off position of the hydraulic pumps 8 and 15 is supported; Sit these elements in the initial position (Fig. 1). By hydraulic line 19, the hydraulic pump 15 is connected to the second tank 16. The main spool 2 contacts the stop finger 20 (fig. 2), and the support piston - with the stop ring 2I. The additional spool 4 is also in the initial position, it is pressed with the second spring 22 against the stop finger 23. The stop fingers 20 and 23 are made in the form of electrical contact fingers. Due to the connection of the spools 2 and 4 to the thrust fingers 20 and 23, both electric circuits are closed, as a result of which (when the ignition is switched on) the control lights of .24 and 25 flash on the control panel. This means that none of the hydraulic pumps 8 and 15 supply the working fluid. The steering system has, as is well known, a control valve 26 that guides the oil to the actuating cylinder 27. Since the car is not moving and therefore not controlled, the control valve 26 is in the neutral position. FIG. 3, the distributor 26 is shown in its normal position when the vehicle is in motion, and the hydraulic pump 8, which is powered by the engine of the automobile, when the control distributor 26 goes to the control position, supplies the hydraulic fluid to the hydraulic cylinder 27. The emergency hydraulic pump 15, which is driven by the rear wheels, supplies oil to the tank 16 Compared to Fir. 1, the main spool 2 is now under pressure, from the hydraulic pump 8, on the front side 5 and is shifted from its original position to the left, in the direction of the opposing first spring 18. As a result, the main spool 2 moves away from the stop pin 20, and the control light 24, showing readiness for work goes out. The support piston 3, which also acts first spring 18, comes into contact with the stop ring 21. The hydraulic pump 8, driven by the engine of the car, is now connected by a longitudinal channel 28, transverse channels 29 and 30, the open annular recess of the piston 31, housing groove 32 I with hydroline 33, which, through control valve 26, is connected, for example, to the right-hand cavity of the hydraulic cylinder 27. The piston 34 moves to the left. The working fluid displaced from the other cavity of the hydraulic cylinder is directed along hydraulic line 35 through the open recess of the piston 36, groove of the housing 37 and hydraulic line 38 into the tank 10. The hole 39 connects the chamber located opposite the cavity 6; spring 40 through the hole 41 and the crossflow 42 - HYD. InacocoM 8. The emergency hydraulic pump 15 pumps the working fluid through the hydroline 43 into the cavity 13, and - creates pressure on the front side 12 of the additional spool 4. Adjacent in the initial position to the thrust finger 23 the additional spool 4 is shifted as a result the side of the counter spring 22 to the right, as a result of which the corresponding control light 25 also extinguishes. The 4-groove of the housing 44, which is regulated by the additional spool, opens and the working fluid flows through the hydraulic line 45, the open recess of the piston 46, the groove in the housing 47 and the hydraulic line 48 into the tank 16 emergency hydraulic pump 15. FIG. 4 shows the valve in an emergency position after stopping the hydraulic pump 8, driven by the engine of the car. Due to the lack of flow of the working fluid from the hydraulic pump 8, the spring 18 pushes the main spool 2 to the right, with the result that it comes in contact with the stop finger 20. As a result The electrical circuit of the control lamp 24 closes, which indicates the failure of a single circuit. Now the groove of the piston 31 is connected through the slit 49 to the groove of the housing 50, which through the hydraulic line 51 and the groove in the housing 37 is connected to the tank 10. Therefore, the load is removed from the hydraulic line 7 of the hydraulic pump B. When the control distributor 26 is moved, the controllable wheels rotate, as a result of which the flow of the working fluid from the emergency pump 15 shifts the additional spool 4 to the right extreme position to the stop ring 21. The support piston 3 also moves turn, holds the main spool 2 in the right extreme position already described. Through a widely open groove in housing 44, hydroline 45, recess of piston 46, groove 32 in Kopnycfe 1 and hydroline 33, the hydraulic fluid 27 can be supplied with hydraulic fluid by means of an accidental hydraulic pump 15. A connecting hole for the spring 52 of additional spool 4 leads 53, as a result of which the pressure created by the emergency r 15 and acting on the face side 2 also has an effect on the reverse side of the support piston 3. With the described switching of the main spool 2 to the emergency position, the spring 18 receives an additional itelnoe gain. For example, if the hydraulic pump driven by the engine of the car still delivers a certain amount of hydraulic fluid, then, as mentioned earlier, through the auxiliary hydraulic line 51, the hydraulic line 38 enters the tank 10. Hydroline 35, which accepts the working fluid from the hydraulic cylinder 27, is connected through the recess of the piston 36 and the groove of the housing 47 with the tank 16 and the emergency hydraulic pump 15. Thus, the power steering is fully operational. Due to the fact that the hydraulic pump 8, which is powered by the engine of the car, is supplied to the hydraulic cylinder, the working fluid passes through the throttle 42, the main spool 2 shifts right into the emergency position and decreases the emergency hydraulic pump 15 when the amount of incoming liquid decreases. partial failure of the hydraulic pump 8, driven by the engine of the car and the resulting decrease in the input fluid, the pressure of the working fluid on both end sides equalize s, whereby the spool is pressed against the persistent pin 20. As a result, the hydraulic pump 8 is connected to the tank 10. The residual pressure in the hydraulic lines 7, caused by partial failure of the hydraulic pump 8, as a result, is eliminated. The working fluid is now supplied to the hydraulic cylinder by an emergency hydraulic pump 15. Claim 1: A car steering system comprising a control valve connected kinematically to the steering wheel and hydraulically to an actuating hydraulic cylinder and an additional valve to the hydraulic pump driven by the car’s engine hydraulically connected to the first tank and the AparSgny hydraulic pump driven by the wheels of the car and the hydraulic engine is automatically connected to the second TaiCoM, and both of these hydraulic pumps associated with an additional distributor, distinguished by the fact that, in order to increase reliability, an additional distributor is made in the form of a housing with an axial bore in which a support piston is installed in the housing with a stop ring, the main and additional spools, and between the main spool and a first spring is located on the supporting piston, a second spring is mounted on the supporting piston and an additional spool, and in the housing it is possible to interact with the yokes of said spools on the sides opposite to the action of pruins, two stubborn fingers are installed, in this case the end cavity is shaped by a casing and an additional socket
    the lottery is connected to the hydraulic pump driven by the wheels of the car, the end cavity formed by the housing and the main spool is connected 5 to the hydraulic pump driven by the engine of the automobile, and the cavity formed by the main slide and the supporting piston is connected through the throttle to the executive hydraulic cylinder
    [2]
    2. The system of claim 1, wherein the additional spool is made with an end protrusion with the ability to interact with the support piston.
    [3]
    3. The system according to claim 1,. Aphids and the fact that the said, stubborn fingers are made in the form of electrical contact pins.
    Sources of information taken into account in the examination
    1 .. Patent of Germany No. 1157945, cl. In 62 D 5/06, 1975 (prototype). 12 × 52 f / /
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU873870A3|1981-10-15|Steering system of car
    US3994133A|1976-11-30|Automatic control device for the distribution of hydraulic fluid between two hydraulic circuits
    US4420934A|1983-12-20|Automotive vehicle hydraulic system
    US3638528A|1972-02-01|Hydraulic boost device with auxiliary fluid supply
    US2392421A|1946-01-08|Hydraulic control valve
    US3733817A|1973-05-22|Emergency pump system with duplicate fluid lines
    US6206044B1|2001-03-27|By-pass solenoid with integral check valve
    US4217968A|1980-08-19|Closed center emergency steering with accumulator source
    SU660577A3|1979-04-30|Hydraulic system for controlling vehicle gearbox
    GB2277066A|1994-10-19|Hydraulic priority flow control valve assemblies
    US4010815A|1977-03-08|Servo steering gear, particularly for alleviator-controlled constant pressure servo systems in motor vehicles
    US4658705A|1987-04-21|Control system for hydraulic fluid pressure
    US3446021A|1969-05-27|Power steering unit with poppet directional control valves
    US3590689A|1971-07-06|Vehicle central hydraulic system
    CA2062778A1|1991-11-30|Pilot control circuit for load sensing hydraulic systems
    US5086687A|1992-02-11|Rotary slide valve for hydraulic auxiliary power steering
    KR20020025712A|2002-04-04|Control valve
    US3874172A|1975-04-01|Fluid pressure regulator valve and safety valve assembly
    US5330024A|1994-07-19|Steering force control apparatus for power steering system
    KR20200138582A|2020-12-10|Electric brake system and Operating method of therof
    JP3001229B2|2000-01-24|Fluid device with relief function
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    SU1504142A1|1989-08-30|Hydraulic control system for vehicle mechanisms
    US5332055A|1994-07-26|Power steering apparatus having hydraulic reaction mechanism
    KR100520486B1|2006-02-28|Brake valve
    同族专利:
    公开号 | 公开日
    GB2001287A|1979-01-31|
    SE429032B|1983-08-08|
    IT1105742B|1985-11-04|
    SE7807426L|1979-01-16|
    FR2397311A1|1979-02-09|
    FR2397311B1|1983-04-08|
    DE2731975B2|1979-12-20|
    DE2731975A1|1979-01-25|
    GB2001287B|1982-01-13|
    DD137213A5|1979-08-22|
    IT7850221D0|1978-07-10|
    US4237993A|1980-12-09|
    DE2731975C3|1980-08-28|
    ES471699A1|1979-02-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1157945B|1961-02-18|1963-11-21|Zahnradfabrik Friedrichshafen|Steering device with auxiliary power especially for motor vehicles|
    US3407894A|1965-03-22|1968-10-29|Gen Motors Corp|Auxiliary means energizing fluid steering system upon deactivation of main pump|
    US3625240A|1969-05-16|1971-12-07|Bendix Corp|Hydraulic booster system|
    BE755754A|1969-09-04|1971-03-04|Caterpillar Tractor Co|Additional supply system for the hydraulic components of a vehicle.|
    US3747725A|1971-03-15|1973-07-24|Ford Motor Co|Power steering system with auxiliary pump|
    DE2329328C2|1973-06-08|1985-03-28|Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen|Automatic sequence valve|
    US3896618A|1974-05-31|1975-07-29|Gen Signal Corp|System for providing auxiliary power|US4317499A|1979-12-26|1982-03-02|Deere & Company|Vehicle emergency steering system|
    US4690620A|1980-08-19|1987-09-01|Karl Eickmann|Variable radial piston pump|
    FI63800C|1982-04-27|1983-08-10|Valmet Oy|PROCEDURE FOR THE PURPOSE OF EXCHANGE OF SPECIFICATIONS IN THE PAPER|
    WO1984003674A1|1983-03-23|1984-09-27|Zahnradfabrik Friedrichshafen|Hydraulic servo-steering for motor vehicles|
    US4669266A|1983-10-05|1987-06-02|Kubik, Inc.|Closed-loop system for unequal displacement cylinder|
    EP0266658B1|1986-11-05|1992-04-29|ZF FRIEDRICHSHAFEN Aktiengesellschaft|Servo steering for automotive vehicles|
    US4762195A|1987-09-02|1988-08-09|Dana Corporation|Hydraulic steering system|
    US5257670A|1991-09-27|1993-11-02|Trw Inc.|Two pump power steering system|
    US5201174A|1991-12-02|1993-04-13|Deere & Company|Auxiliary hydraulic pump system|
    SE509078C2|1993-10-13|1998-11-30|Kvaerner Hymac Inc|Uninterrupted lubrication system for a machine|
    US6173728B1|1998-11-06|2001-01-16|Trw Inc.|Switching valve for a hydraulic power steering system|
    DE19855404A1|1998-12-01|2000-06-15|Daimler Chrysler Ag|Hydraulic power steering for motor vehicles|
    US6966398B2|2003-03-26|2005-11-22|Trw Automotive U.S. Llc|Apparatus for controlling a power-assisted steering gear in response to vehicle speed|
    EP1582437A1|2004-04-01|2005-10-05|TRW Automotive U.S. LLC|Apparatus for controlling a power-assisted steering gear in response to vehicle speed|
    GB0515494D0|2005-07-28|2005-08-31|Bamford Excavators Ltd|Fluid pumping apparatus|
    US7510044B2|2007-05-11|2009-03-31|Trw Automotive U.S. Llc|Power steering apparatus|
    CN102700603B|2012-05-31|2013-12-25|陕西秦川机械发展股份有限公司|Emergency two-circuit power steering system|
    US9840273B2|2015-12-07|2017-12-12|Caterpillar Inc.|Electrohydraulic steering system with diagnostics|
    JP6972608B2|2017-03-27|2021-11-24|日本電産トーソク株式会社|Spool valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772731975|DE2731975C3|1977-07-15|1977-07-15|Power steering for motor vehicles|
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