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JP4819359B2 - Electro-hydraulic brake device and monitoring method thereof - Google Patents

Electro-hydraulic brake device and monitoring method thereof Download PDF

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JP4819359B2
JP4819359B2 JP2004533350A JP2004533350A JP4819359B2 JP 4819359 B2 JP4819359 B2 JP 4819359B2 JP 2004533350 A JP2004533350 A JP 2004533350A JP 2004533350 A JP2004533350 A JP 2004533350A JP 4819359 B2 JP4819359 B2 JP 4819359B2
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pump
hydraulic
electric motor
discharge output
brake device
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JP2005535516A (en
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コール・アンドレアス
プフ・リューディガー
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コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト
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Priority claimed from PCT/EP2003/008872 external-priority patent/WO2004022402A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • B60T8/4081—Systems with stroke simulating devices for driver input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/148—Arrangements for pressure supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4036—Pump units characterised by their failure-responsive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/404—Control of the pump unit

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)

Description

本発明は、液圧源が電子制御ユニットによって制御可能であり、液圧源が電動機によって駆動される液圧ポンプと、このポンプによって圧力を供給可能な高圧アキュムレータとによって形成されている、“ブレーキ−バイ−ワイヤ”のタイプの自動車用電気油圧式ブレーキ装置に関する。本発明は更に、この種の電気油圧式ブレーキ装置を監視する方法に関する。   According to the present invention, a “brake” is formed by a hydraulic pressure pump that can be controlled by an electronic control unit, the hydraulic pressure source being driven by an electric motor, and a high-pressure accumulator that can supply pressure by the pump. The present invention relates to an electrohydraulic brake device for vehicles of the “by-wire” type. The invention further relates to a method for monitoring such an electrohydraulic brake device.

特許文献１により、ブレーキ装置をチェックするための方法と装置が知られている。その際、圧力媒体に溶けていないガスまたは空気の量は、車輪ブレーキ内で上昇および低下した圧力の時間的な変化から、圧力媒体内のガス量を求めることによって決定される。その際、空気またはガスが液圧システム内に既に侵入しているときに初めて、空気またはガスの量が判定されることは不利であると見なされる。この公知の方法の他の欠点は、自動車の停止状態でしかブレーキシステムの検査を行うことができないことにある。
独国特許出願公開第１９６０３９０９号明細書 From US Pat. No. 6,057,049, a method and device for checking a brake device is known. At this time, the amount of gas or air that is not dissolved in the pressure medium is determined by obtaining the amount of gas in the pressure medium from the temporal change in the pressure increased and decreased in the wheel brake. In doing so, it is considered disadvantageous to determine the amount of air or gas only when air or gas has already entered the hydraulic system. Another disadvantage of this known method is that the brake system can only be inspected when the vehicle is stopped.
German Patent Application Publication No. 1963909

そこで、本発明の課題は、できるだけ早い時点で、例えばシステムへの空気またはガスの侵入時に既に、空気またはガスを判定することができる、冒頭に述べた種類の自動車ブレーキ装置を検査するための手段を提供することである。更に、ブレーキシステムの操作に依存しないでおよび自動車の運転中にブレーキシステムを検査できるようにすべきである。 The object of the present invention is therefore a means for inspecting a motor vehicle braking device of the kind mentioned at the beginning, which can already determine air or gas at the earliest possible time, for example when air or gas enters the system. Is to provide. Furthermore, it should be possible to inspect the brake system independently of the operation of the brake system and while driving the vehicle.

この課題は本発明に従い、ポンプの吸込み側のガス量または空気量を判定するためにポンプの油圧吐出出力を監視する手段が設けられていることによって解決される。 This problem is solved according to the present invention by providing means for monitoring the hydraulic discharge output of the pump to determine the amount of gas or air on the suction side of the pump.

発明思想を具体化するために、油圧吐出出力の監視が、液圧ポンプを駆動する電動機の起電力（電動力）を判定することによって行われる。 In order to embody the inventive concept, the hydraulic discharge output is monitored by determining the electromotive force (electric force) of the electric motor that drives the hydraulic pump.

有利な実施形では、油圧吐出出力の監視が、液圧ポンプを駆動する電動機の電力消費を判定することによって行われる。 In an advantageous embodiment, the hydraulic discharge output is monitored by determining the power consumption of the motor driving the hydraulic pump.

他の有利な実施形では、油圧吐出出力の監視が、液圧ポンプを駆動する電動機の回転速度を判定することによって行われる。 In another advantageous embodiment, the hydraulic discharge output is monitored by determining the rotational speed of the electric motor that drives the hydraulic pump.

低価格の有利な実施形では、回転速度がポンプを駆動する電動機の起電力から求められる。そのために、本発明に従い、電動機の動作周波数が好ましくは２５Ｈｚであり、低域フィルタの時定数が好ましくは４ｍｓｅｃである。   In a low-cost advantageous embodiment, the rotational speed is determined from the electromotive force of the motor that drives the pump. Therefore, according to the present invention, the operating frequency of the motor is preferably 25 Hz, and the time constant of the low-pass filter is preferably 4 msec.

更に、課題は方法では、ポンプの吸込み側のガス量または空気量がポンプの油圧吐出出力の決定によって判定されることによって解決される。 Furthermore, the problem is solved in the method by determining the amount of gas or air on the suction side of the pump by determining the hydraulic discharge output of the pump.

本発明による方法の他の有利な特徴は従属請求項９〜１４から明らかである。   Other advantageous features of the method according to the invention are apparent from the dependent claims 9-14.

添付の図を参照した実施の形態の次の記載において本発明による方法を詳しく説明する。 The method according to the invention will be described in detail in the following description of the embodiments with reference to the accompanying figures.

図１に概略的に示したブレーキ装置は実質的に、ブレーキペダル１によって操作可能な二系統型の油圧式圧力発生器またはタンデム構造のマスターシリンダ２と、タンデムマスターシリンダ２と協働する変位シミュレータ３と、タンデムマスターシリンダ２に付設された圧力媒体貯蔵容器４と、油圧式圧力源と、概略的に示した制御ユニットＨＣＵ６と、電子制御兼調整ユニットＥＣＵ１６とからなっている。この制御ユニットは特に、圧力調整のために必要なすべての要素を含み、この制御ユニットには、例えば自動車の後車軸に付設された車輪ブレーキ７，８が接続されている。示唆的に示した車輪センサ２４，２５は車輪の回転速度を測定する働きをする。それ自体公知のタンデムマスターシリンダ２は２個のピストン９，１０によって画成された互いに分離された圧力室１４，１５を備えている。この圧力室は圧力媒体貯蔵容器４に接続可能であり、かつＨＣＵ６を介して車輪ブレーキ７，８に接続可能である。前述の圧力源は、電動機２２とこの電動機２２によって駆動されるポンプ２３とからなるモータ−ポンプ−装置２０と、ポンプに対して並列に接続された圧力制限弁２６と、ポンプ２３に圧力を加えることができる高圧アキュムレータ２１とによって形成されている。高圧アキュムレータ２１によって加えられる液圧は圧力センサ３５によって監視される。   The brake device schematically shown in FIG. 1 is substantially a dual hydraulic pressure generator or tandem master cylinder 2 that can be operated by a brake pedal 1, and a displacement simulator cooperating with the tandem master cylinder 2. 3, a pressure medium storage container 4 attached to the tandem master cylinder 2, a hydraulic pressure source, a control unit HCU 6 schematically shown, and an electronic control and adjustment unit ECU 16. This control unit includes in particular all elements necessary for pressure regulation, to which are connected wheel brakes 7, 8 attached to the rear axle of the motor vehicle, for example. Suggested wheel sensors 24, 25 serve to measure the rotational speed of the wheels. The tandem master cylinder 2 known per se comprises pressure chambers 14 and 15 which are separated from one another and defined by two pistons 9 and 10. The pressure chamber can be connected to the pressure medium storage container 4 and can be connected to the wheel brakes 7 and 8 via the HCU 6. The pressure source mentioned above includes a motor-pump-device 20 including an electric motor 22 and a pump 23 driven by the electric motor 22, a pressure limiting valve 26 connected in parallel to the pump, and applies pressure to the pump 23. The high-pressure accumulator 21 can be used. The hydraulic pressure applied by the high pressure accumulator 21 is monitored by the pressure sensor 35.

更に図１から明らかなように、車輪ブレーキ７，８は管路５によって第１の圧力室１４に接続されている。この管路５には、分離弁１１が装置されている。この分離弁は通電しないときに開放する（ＳＯ−）２／２方向制御弁として形成され、第１の圧力室１４を遮断することができる。第２の液圧管路３４はポンプ２３の圧力側または高圧アキュムレータ２１を、車輪ブレーキ７，８の手前に接続配置された２個の２／２方向制御弁または入口弁１７，１８の入口ポートに接続する。この入口弁は電磁操作可能で、アナログ制御可能で、好ましくは通電しないときに閉じる（ＳＧ−）。同様に電磁操作可能で、アナログ制御可能で、好ましくは通電しないときに閉じる（ＳＧ−）２／２方向制御弁または出口弁２７，２８は、車輪ブレーキ７，８を圧力媒体貯蔵容器４に接続することができる。一方、電磁操作可能で、好ましくは通電しないときに開放する（ＳＯ−）圧力補償弁１３は、車輪ブレーキ７，８に加えられる圧力を車輪毎に調整することができる。   Further, as is clear from FIG. 1, the wheel brakes 7 and 8 are connected to the first pressure chamber 14 by a pipe line 5. The pipe 5 is provided with a separation valve 11. This isolation valve is formed as an (SO−) 2/2 direction control valve that opens when not energized, and can shut off the first pressure chamber 14. The second hydraulic line 34 connects the pressure side of the pump 23 or the high-pressure accumulator 21 to the inlet ports of two 2 / 2-way control valves or inlet valves 17, 18 connected in front of the wheel brakes 7, 8. Connecting. This inlet valve can be operated electromagnetically, can be analog controlled, and is preferably closed when not energized (SG-). Similarly electromagnetically operable, analog controllable, preferably closed when not energized (SG-) 2/2 directional control or outlet valves 27, 28 connect the wheel brakes 7, 8 to the pressure medium reservoir 4 can do. On the other hand, the pressure compensation valve 13 that can be electromagnetically operated and is preferably opened when not energized (SO-) can adjust the pressure applied to the wheel brakes 7 and 8 for each wheel.

更に、車輪ブレーキ７，８に圧力センサ３０，３１が付設されている。この圧力センサによって、車輪ブレーキ７，８内の液圧が測定される。前述の電子式調整兼制御ユニットＥＣＵ１６には、圧力センサ１９，３０，３１，３５と車輪回転速度センサ２４，２５と好ましくは冗長的に形成されマスターブレーキシリンダ２に付設されたブレーキング要求検出装置３３との出力信号が供給される。この電子式調整兼制御ユニットはモータ−ポンプ−装置２０と前述の弁１１，１３，１７，１８，２７，２８を制御する働きをする。   Furthermore, pressure sensors 30 and 31 are attached to the wheel brakes 7 and 8. With this pressure sensor, the hydraulic pressure in the wheel brakes 7, 8 is measured. In the electronic adjustment and control unit ECU 16 described above, the pressure sensor 19, 30, 31, 35 and the wheel rotational speed sensors 24, 25 are preferably formed redundantly and provided to the master brake cylinder 2 as a braking request detecting device. 33 is supplied as an output signal. This electronic adjustment and control unit serves to control the motor-pump device 20 and the aforementioned valves 11, 13, 17, 18, 27, 28.

前述のブレーキ装置（その運転は専門家に知られている）の液圧制御ユニットＨＣＵ６は、電動機２２に供給される電圧の時間的な変化を検出するＡ／Ｄコンバータ３２を備えている。電動機２２は通常のごとく、例えば１７５Ｈｚの比較的に高い周波数で作動させられる。Ａ／Ｄコンバータ３２の出力信号は電子式制御兼調整ユニット１６に供給され、そこで評価される。申し分のない評価を行うことができるようにするために、Ａ／Ｄコンバータ３２の評価すべき出力信号をろ波しなければならない。なぜなら、整流時に生じる火花形成に基づいて強いノイズを生じるからである。そのために、ＥＣＵ１６は図示していない低域フィルタを備えている。この低域フィルタの時定数はいわゆる整流火花から生じ、好ましくは４ｍｓｅｃである。その際、電動機２２は前述の比較的に高い周波数ではなく、好ましくは２５Ｈｚの低い周波数で作動させられる。   The hydraulic control unit HCU6 of the aforementioned brake device (whose operation is known to experts) includes an A / D converter 32 that detects a temporal change in the voltage supplied to the electric motor 22. As usual, the motor 22 is operated at a relatively high frequency, for example 175 Hz. The output signal of the A / D converter 32 is supplied to the electronic control and adjustment unit 16 where it is evaluated. In order to be able to perform a satisfactory evaluation, the output signal to be evaluated of the A / D converter 32 must be filtered. This is because strong noise is generated based on spark formation that occurs during rectification. For this purpose, the ECU 16 includes a low-pass filter (not shown). The time constant of this low-pass filter arises from a so-called rectifying spark and is preferably 4 msec. In doing so, the motor 22 is operated at a low frequency of preferably 25 Hz, rather than the relatively high frequency described above.

図２ａに示したろ波した信号の変化から明らかなように、ｔ１とｔ２の間の時間インターバルにおいて、電動機は一定の電圧で運転される。ｔ２とｔ３の間の時間インターバルでは、電動機はジェネレータ運転を続け、起電力を発生する。区間ｔ２−ｔ３に示した起電力の変化は、電動機が負荷下で作動しかつ排他的に圧力媒体をシステムに供給するポンプ２３を駆動するケースに相当する。これに対して、図２ｂには、ｔ２−ｔ３の区間における、電動機２２の起電力の変化が示してある。この電動機は空気またはガスを吸い込むポンプ２３を駆動する。空気またはガスの吸込みを確実に判定するために、起電力の現在の値をＥＣＵ１６に記憶された、所望な負荷運転を示す値と比較することにより、電動機は常に監視される。すなわち、自動車の連続運転でのポンプの吸込み側の監視が行われる。 Shows braze As is apparent from the change in the wave signal in Fig. 2a, the time interval between t 1 and t 2, the motor is operated at a constant voltage. The time interval between t 2 and t 3, the motor continues to generators operating, generates an electromotive force. The change in electromotive force shown in the section t 2 -t 3 corresponds to a case in which the motor operates under a load and drives the pump 23 that exclusively supplies the pressure medium to the system. On the other hand, FIG. 2b shows the change in the electromotive force of the motor 22 in the section t 2 -t 3 . This electric motor drives a pump 23 for sucking air or gas. In order to reliably determine the intake of air or gas, the motor is constantly monitored by comparing the current value of the electromotive force with a value stored in the ECU 16 indicating the desired load operation. That is, the suction side of the pump is monitored during continuous operation of the automobile.

本発明の範囲内において、多数の変形を行うことができる。例えば起電力の代わりに、ポンプを駆動する電動機の電力消費を、ポンプの送出出力を示すものとして使用することができる。更に、一定の電圧で運転されるモータの回転数を、ポンプの送出出力を示す値をして使用することができる。   Many variations can be made within the scope of the present invention. For example, instead of the electromotive force, the power consumption of the motor driving the pump can be used as an indication of the pump output. Furthermore, the number of rotations of the motor operated at a constant voltage can be used as a value indicating the pump output.

本発明による方法を実施することができる電気油圧式ブレーキ装置を概略的に示す図である。1 schematically shows an electrohydraulic brake device in which the method according to the invention can be carried out. 負荷下で普通運転されるポンプを駆動する電動機の電圧の変化を示す図である。It is a figure which shows the change of the voltage of the electric motor which drives the pump normally drive | operated under load. 負荷されないで作動する自由回転のポンプを駆動する電動機の電圧の時間的な変化を示す図である。It is a figure which shows the time change of the voltage of the electric motor which drives the free rotation pump which operate | moves without being loaded.

Claims (14)

液圧源が電子制御ユニットによって制御可能であり、液圧源が電動機によって駆動される液圧ポンプと、このポンプによって圧力を供給可能な高圧アキュムレータとによって形成されている、“ブレーキ−バイ−ワイヤ”のタイプの自動車用電気油圧式ブレーキ装置において、
ポンプの油圧吐出出力を、ポンプの油圧吐出出力に特有の、電動機の値に基づいて監視し、当該特有の値の現在の値を、電子制御ユニット内で前もって定められた値と比較することにより、ポンプの吸込み側のガス量または空気量をポンプの油圧吐出出力に基づいて判定する手段が設けられていることを特徴とする電気油圧式ブレーキ装置。A "brake-by-wire" formed by a hydraulic pressure source that can be controlled by an electronic control unit, the hydraulic pressure source being driven by an electric motor, and a high pressure accumulator capable of supplying pressure by this pump In the type of electro-hydraulic brake device for automobiles,
By monitoring the hydraulic discharge output of the pump based on the value of the motor specific to the hydraulic discharge output of the pump and comparing the current value of the specific value with a predetermined value in the electronic control unit , electro-hydraulic brake system, characterized in that means for determining based on the suction side of the gas quantity or amount of air pump to the hydraulic discharge output of the pump is provided. 油圧吐出出力の監視が、液圧ポンプを駆動する電動機の起電力を判定することによって行われることを特徴とする、請求項１記載の電気油圧式ブレーキ装置。 2. The electrohydraulic brake device according to claim 1, wherein the hydraulic discharge output is monitored by determining an electromotive force of an electric motor that drives the hydraulic pump. 油圧吐出出力の監視が、液圧ポンプを駆動する電動機の電力消費を判定することによって行われることを特徴とする、請求項１記載の電気油圧式ブレーキ装置。 2. The electrohydraulic brake device according to claim 1, wherein monitoring of the hydraulic discharge output is performed by determining power consumption of an electric motor that drives the hydraulic pump. 油圧吐出出力の監視が、液圧ポンプを駆動する電動機の回転速度を判定することによって行われることを特徴とする、請求項１記載の電気油圧式ブレーキ装置。 2. The electrohydraulic brake device according to claim 1, wherein the hydraulic discharge output is monitored by determining a rotational speed of an electric motor that drives the hydraulic pump. 回転速度がポンプを駆動する電動機の起電力から求められることを特徴とする、請求項４記載の電気油圧式ブレーキ装置。  5. The electrohydraulic brake device according to claim 4, wherein the rotation speed is obtained from an electromotive force of an electric motor that drives the pump. 電動機の動作周波数が２５Ｈｚであることを特徴とする、請求項１〜５のいずれか一つに記載の電気油圧式ブレーキ装置。  The electrohydraulic brake device according to any one of claims 1 to 5, wherein an operating frequency of the electric motor is 25 Hz. 低域フィルタの時定数が４ｍｓｅｃであることを特徴とする、請求項１〜６のいずれか一つに記載の電気油圧式ブレーキ装置。  The electrohydraulic brake device according to any one of claims 1 to 6, wherein a time constant of the low-pass filter is 4 msec. 液圧源が電子制御ユニットによって制御可能であり、液圧源が電動機によって駆動される液圧ポンプと、このポンプによって圧力を供給可能な高圧アキュムレータとによって形成されている、“ブレーキ−バイ−ワイヤ”のタイプの自動車用電気油圧式ブレーキ装置を監視する方法において、
ポンプの油圧吐出出力がポンプの油圧吐出出力に特有の、電動機の値に基づいて判定され、ポンプの油圧吐出出力に特有の、電動機の値の現在の値を電子制御ユニット内で予め定められた値と比較することにより、ポンプの吸込み側のガス量または空気量がポンプの油圧吐出出力に基づいて判定されることを特徴とする前記方法。A "brake-by-wire" formed by a hydraulic pressure source that can be controlled by an electronic control unit, the hydraulic pressure source being driven by an electric motor, and a high pressure accumulator capable of supplying pressure by this pump In a method of monitoring an electrohydraulic brake device for automobiles of the type
The hydraulic discharge output of the pump is determined based on the value of the electric motor specific to the hydraulic discharge output of the pump, and the current value of the electric motor value specific to the hydraulic discharge output of the pump is predetermined in the electronic control unit. The method according to claim 1, wherein the amount of gas or air on the suction side of the pump is determined based on the hydraulic discharge output of the pump by comparing with the value . 油圧吐出出力の決定がポンプを駆動する電動機の起電力の評価によって行われることを特徴とする、請求項８記載の方法。 9. The method according to claim 8, characterized in that the determination of the hydraulic discharge output is made by evaluating the electromotive force of the electric motor driving the pump. 油圧吐出出力の決定がポンプを駆動する電動機の電力消費の評価によって行われることを特徴とする、請求項８記載の方法。 9. The method according to claim 8, wherein the determination of the hydraulic discharge output is made by evaluating the power consumption of the motor driving the pump. 油圧吐出出力の決定がポンプを駆動する電動機の回転速度の評価によって行われることを特徴とする、請求項８記載の方法。 9. The method according to claim 8, wherein the determination of the hydraulic discharge output is made by evaluating the rotational speed of the electric motor driving the pump. ポンプを駆動する電動機の回転速度が電動機の起電力によって決定されることを特徴とする、請求項８記載の方法。  9. A method according to claim 8, characterized in that the rotational speed of the motor driving the pump is determined by the electromotive force of the motor. 電動機の動作周波数が２５Ｈｚであることを特徴とする、請求項８〜１２のいずれか一つに記載の方法。  The method according to claim 8, wherein the operating frequency of the electric motor is 25 Hz. 低域フィルタの時定数が４ｍｓｅｃであることを特徴とする、請求項８〜１３のいずれか一つに記載の方法。  The method according to claim 8, wherein the time constant of the low-pass filter is 4 msec.
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