• 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:
    This invention relates to vehicle braking systems. The purpose of the invention is to improve the control accuracy while accelerating the process. The pressure control in the brake actuator is carried out by means of an electromagnetic valve by controlling it with a constant signal until the actual pressure is reached. Subsequently, the control is carried out by pulse-like signals, the duration of which is not sufficient to completely open the solenoid valve. 4 hp f-ly, 3 ill. § ABOUT)
    公开号:SU1438604A3
    申请号:SU864004303
    申请日:1986-01-07
    公开日:1988-11-15
    发明作者:Ротен Иоганн
    申请人:Вабко Вестингхауз Фарцойгбремзен Гмбх (Фирма)；
    IPC主号:
    专利说明:

    four
    oo
    00 O5
     SP
    The invention relates to the control of brake pressure regulators, in particular, to the method of and the continuous control of the pressure control solenoid valve.
    The purpose of the invention is to improve the control accuracy while accelerating the process.
    FIG. 1 shows a block diagram of a pneumatic device for adjusting the brake pressure used to implement the control method; in fig. 2 is a time chart of the pressure change during the implementation of the continuous control method; in fig. 3 - the same with a different variant of the control method. The brake pressure regulating device contains a brake controlled by the working medium, the pressure of which must be regulated and through the inlet valve 2 to the electromagnet box 3 is connected to the pressure source 4 and through the outlet valve 5 to the electromagnet coil 6 . The braking pressure available in the brake is measured by pressure sensor 7, a signal proportional to the pressure measured by ty, the actual value of which is compared with the setpoint signal supplied through line 8 to a control valve used to control solenoid valves 9 controlling the electromagnet coils of the intake and exhaust valves.
    In FIGS. 2 and 3, reference numeral 10 denotes a predetermined pressure value, a. By position 11, the actual value of the distance; by position 12, the control terminals for the inlet valve, position 13 is the pressure holding area, by positions 14 and 15 are intermediate pressure areas on both sides, by position 16, in which the inlet valve fully open, and position 17 - olast, in which the graduation k.lapan is fully open.





    On fi1. 3 shows another principle of operation of unit 9. According to this
    In case measured by the sensor
    7, the actual pressure is still not in the -, -g form of the sensor 7 can be controlled so that it measures the pressure increase / ip over a known time
    the same intermediate region 15 (i.e., below the pressure limits P, the predetermined
    , AocTfc), then the intake valve. If
    between RFP but “with a pan full),
    Pl
    YR,
    In addition, a difference is determined up to a predetermined pressure.
    (t
    when the actual pressure reaches the limit of the intermediate region 15, the inlet valve is closed by block 9 for the time tc. After the time tn has elapsed, unit 9 generates a control pulse for applying pressure during the corresponding width of time tp, after which the control pulse again disappears and the inlet valve closes again.
    The initial value tp of the time tp is chosen so that, taking into account the (known) most adverse conditions with respect to temperature, voltage, pressure, etc., the pressure of the DG is increased only until pressure holding area 13 is reached. As a rule, the actual value of the pressure after the expiration of the time tp lies still in the intermediate region, if the increase in pressure P lies even lower (and -1e in block-9) butt, the threshold value / DF of the pressure drop (e.g., 50 mbar ), then block 9 again controls the inlet valve by pulses, namely for an extended time At (0, -2 millisek) time
    wg
    r tpi
    + / 3t), if at the same time pre (t
    A predetermined threshold value of the pressure differential LR is then generated, then pulses are generated with a time t p until the pressure holding region 13 is reached, in which the inlet valve closes.
    If in the intermediate area 15
    (t
    during the period tp the given upper threshold value of the differential rises (as in block 9), then for the next control phase the pulse time decreases by dt until the pressure drops below this threshold value P,
    As long as the actual pressure is in the intermediate region 15 dPj is taken as the new initial value and, if necessary, depending on the measured pressure drop, is changed for so long by t, until the pressure hold region 13 is reached
    On fi1. 3 shows another principle of operation of unit 9. According to this
    Pl
    YR,
    In addition, a difference is determined up to a predetermined pressure.
    The new pulse time tp is calculated
    by equation
    PI
    (t
    Pi
    to
    LR LR
    3
    where tj03Ha4aeT is the delay time for actuating the solenoid valve. The width of the next pilot pulse is set according to this specific new time, after the pressure sub-region is reached.
    The advantage of this option compared to the variant according to FIG. This means that in order to reach the pressure holding area, fewer pulses are required, particularly in the upper pressure limits.
    权利要求:
    Claims (5)
    [1]
    1. A method of continuously controlling an electromagnetic pressure regulating valve, concluding in generating a signal proportional to the actual value of the regulated pressure, comparing this signal with a signal proportional to the specified pressure value, and increasing a constant control signal to open the electromagnetic valve before reaching a signal proportional to the actual value controlled pressure, the level of the first zone between the upper and lower threshold values m. and the further flow of pulsed control signals with variable pulse duty ratio until the second pressure holding zone is reached, characterized in that, in order to increase the control accuracy with simultaneous acceleration of the process, the solenoid valve is controlled until the second pressure zone is reached;
    /
    which is insufficient for
    full opening of the solenoid valve, and the duration of the pulse signal varies depending on the measured pressure change for the previous pulse signal.
    [2]
    2. A method according to claim 1, characterized in that it increases the duration of a pulsed signal by 0.1-2 ms with a pressure change beyond the previous pulse signal by an amount less than the lower threshold value, and reduces the duration of its pulse by 0, 1-2 ms with a pressure change beyond the previous pulse signal by an amount greater than the upper threshold value.
    [3]
    3. A method according to claim 1, characterized in that the control pulse signals are generated until a second pressure zone is reached, in which the pressure reached is maintained by de-energizing the solenoid valve.
    [4]
    4. The method according to claim I, in different cases, so that the duration of the control of the impulse signal is set in accordance with the expression
    up to 45
    thirty
    PI
    (tp, - tj)
     / jP
    - t.
    up to 45 35
    where t
    Pi h
    LR
    the duration of the previous pulse;
    the delay time of the valve solenoid actuating from the moment of supplying the control signal;
    pressure change beyond the leading control pulse signal; L P - the difference between the actual
    pressure value and set point.
    [5]
    5. The method according to claim 4, wherein the change in pressure 4P is measured during the first control of the pulse signal.
    FIG. one
    in / J CHHau
    g //
    r ::;
    "Uh
    "E
    one
    AAL
    And and
    L
    /
    /four//
    : i ::
    JZLZ2 /
    /
    / 0
    T
    bx
    V5
    fp2 tpl-t- t
    /
    12
    ig. 2
    7
    Ex
    .j
    : Z
    / J
    W
    x; J
    : z /
    / i
    /five
    G6 tpl tp2
    and.b
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    EP0188686A3|1987-08-05|
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    US4887636A|1989-12-19|
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    引用文献:
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    FR2144951A5|1971-07-05|1973-02-16|Commissariat Energie Atomique|
    US3874407A|1974-01-02|1975-04-01|Ray F Griswold|Pulse width modulation control for valves|
    FR2293736B1|1974-12-02|1978-07-13|Wabco Westinghouse|
    JPS5752607B2|1975-09-22|1982-11-09|
    JPS53136187A|1977-04-28|1978-11-28|Mitsubishi Heavy Ind Ltd|Electric-pneumatic converting control system of magnet valve type relay valve|
    DE2811345C2|1978-03-16|1986-12-11|Knorr-Bremse AG, 8000 München|Pressure regulators for pneumatic pressures, in particular in vehicles|
    US4241750A|1978-11-27|1980-12-30|Kabushiki Kaisha Cosmo Keiki|Pressure setting device|
    DE2902337A1|1979-01-22|1980-07-24|Knorr Bremse Gmbh|BRAKE PRESSURE REGULATORS FOR PNEUMATIC BRAKES OF VEHICLES, IN PARTICULAR RAIL VEHICLES|
    DE2930433A1|1979-07-26|1981-05-21|Knorr-Bremse GmbH, 8000 München|BLOCKED PROTECTIVE BRAKE CONTROL CIRCUIT FOR RAIL VEHICLES|
    AT364065B|1980-02-14|1981-09-25|Hoerbiger Ventilwerke Ag|DEVICE FOR REGULATING THE FLOW RATE OF A COMPRESSOR SYSTEM|
    DE3138647A1|1981-09-29|1983-04-14|Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart|"CONTROL DEVICE FOR SOLENOID VALVES"|DE3543145C2|1985-12-06|1995-08-03|Bosch Gmbh Robert|Electric braking system for a vehicle|
    CH671435A5|1986-07-16|1989-08-31|Denise Meneguz|
    GB8623988D0|1986-10-07|1986-11-12|Bendix Ltd|Vehicle braking systems|
    DE3636139C2|1986-10-24|1994-12-08|Knorr Bremse Ag|Brake cylinder pressure regulator for air brakes of vehicles|
    DE3812672C2|1987-04-20|1995-09-28|Mitsubishi Motors Corp|Hydraulic control method for a hydraulically actuated load|
    JP2906410B2|1987-04-20|1999-06-21|三菱自動車工業株式会社|Hydraulic control method for automatic transmission|
    DE3731076A1|1987-09-16|1989-03-30|Bosch Gmbh Robert|METHOD FOR IMPLEMENTING A SIGNAL ACCORDING TO A TARGET PRINT|
    US4904027A|1988-10-03|1990-02-27|American Standard Inc.|Digital air brake control system|
    JPH02280206A|1989-04-21|1990-11-16|Eishin Giken:Kk|Pressure setter|
    EP0427671B1|1989-11-08|1994-07-27|Ciba-Geigy Ag|Valve|
    DE9011631U1|1990-08-09|1991-12-05|Lucas Industries P.L.C., Birmingham, West Midlands, Gb|
    US5419768A|1991-03-07|1995-05-30|Aeros Instruments, Inc.|Electrical medical vacuum regulator|
    US5101862A|1991-08-08|1992-04-07|Leete Barrett C|Rotary actuator and valve control system|
    DE4316560C2|1993-05-18|1996-11-07|Ipt Inst Prueftech Geraetebau|Process for pressure control by solenoid valves on pressurized devices, e.g. on devices for pressure testing in plastic pipes, as well as control circuit for solenoid valves|
    US5423749A|1993-11-18|1995-06-13|Minnesota Mining And Manufacturing Company|Cardioplegia administration system and method|
    DE4409909C2|1994-03-23|2003-11-27|Continental Teves Ag & Co Ohg|Circuit arrangement for a brake system with electronic control|
    DE4428929A1|1994-08-16|1996-02-22|Wabco Gmbh|Method and device for pressure control|
    US5526838A|1995-01-12|1996-06-18|Mac Valves, Inc.|Method and valve assembly for controlling a pilot signal|
    US5499647A|1995-01-12|1996-03-19|Mac Valves, Inc.|Method and valve assembly for controlling a pilot signal|
    JP3869028B2|1995-04-28|2007-01-17|日産自動車株式会社|Brake hydraulic pressure control device|
    DE19604315A1|1996-02-07|1997-08-14|Bosch Gmbh Robert|Electromagnetically operated valve, in particular for hydraulic brake systems in motor vehicles|
    DE19604317A1|1996-02-07|1997-08-14|Bosch Gmbh Robert|Electromagnetically operated valve, in particular for hydraulic brake systems in motor vehicles|
    DE10106464A1|2000-06-20|2002-01-03|Continental Teves Ag & Co Ohg|Method and control system for controlling an electronically controllable brake actuation system|
    US8679241B2|2006-10-30|2014-03-25|Novartis Ag|Gas pressure monitor for pneumatic surgical machine|
    US8162000B2|2006-12-13|2012-04-24|Novartis Ag|Adjustable pneumatic system for a surgical machine|
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    US8312800B2|2006-12-21|2012-11-20|Novartis Ag|Pneumatic system for a vitrector|
    DE102007006725A1|2007-02-06|2008-08-07|Siemens Ag|Performance-optimized safety brake|
    US9555784B2|2014-12-12|2017-01-31|Caterpillar Inc.|Braking system and method for machine|
    DE102015007424A1|2015-06-09|2016-12-15|Hydac Fluidtechnik Gmbh|Pressure control device|
    JP6706121B2|2016-03-30|2020-06-03|株式会社フジキン|Pressure control device and pressure control system|
    DE102017222954B4|2017-12-15|2019-06-27|Knorr-Bremse Systeme für Schienenfahrzeuge GmbH|Brake system with a correction device of an opening time of a valve and method for correcting the opening time of the valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19853502276|DE3502276A1|1985-01-24|1985-01-24|DEVICE FOR CONTINUOUSLY CONTROLLING A SOLENOID VALVE DESIGNED NORMALLY FOR DISCONTINUOUS OPERATION|
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