CN106536309A - 用于运行制动装置的方法、控制器 - Google Patents
用于运行制动装置的方法、控制器 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/441—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters
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- 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
- B60T13/24—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 gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
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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
- 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
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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
- 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
- B60T13/58—Combined or convertible systems
- B60T13/581—Combined or convertible systems both hydraulic and pneumatic
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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
- 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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
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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
- B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/444—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using vacuum
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Abstract
本发明涉及一种用于运行车辆的、尤其机动车的液压制动装置的方法,所述液压制动装置具有至少一个制动助力器,所述制动助力器根据驾驶员制动期望来调设制动助力。在此规定,借助配属于气动的制动助力器的真空传感器来获取所述驾驶员制动期望并且调设液压制动助力。
Description
技术领域
本发明涉及一种用于运行用于车辆、尤其机动车的制动装置的方法,所述制动装置具有至少一个制动助力器,其中根据驾驶员制动期望来实现自动的制动助力。
背景技术
开头所提及的类型的方法由现有技术公开。为了运行液压制动装置尤其对于机动车而言已知的是,根据驾驶员制动期望来识别紧急情况并且调设制动助力,以便在紧急情况下辅助驾驶员。在此例如由DE 10 2010 002 574 A1已知:根据所述驾驶员制动期望和车辆的至少一个车轮的转速的变化来识别紧急制动情况。现代的制动装置以液压的方式工作,其中机动车的驾驶员能够通过制动踏板操纵来调设所期望的制动压力。在此通过所述制动踏板操纵所调设的液压压力通常作用于主制动缸上,所述主制动缸将制动液挤压到所述制动装置的管路系统中,在此将由此所产生的压力提供给车轮制动装置以用于施加制动力矩。已知的是,这种制动装置设有气动的制动助力器,所述气动的制动助力器在制动踏板的操纵力相同的情况下提供更高的制动压力。所述制动助力通常借助于负压(Unterdruck)来实现。所述负压在此能够例如通过在机动车的内燃机的进气管中所提供的负压或者通过单独的真空泵来产生。通常的气动的制动助力器具有前室和主室,这两个室被施加以负压。这两个室通常利用能够移动的膜相互分开。通过操纵所述制动踏板,或多或少的大气压到达所述前室中并且由此辅助所述制动踏板操纵。
此外已知的是,设置液压制动助力器,当传统的负压控制的制动助力器不再够用时,所述液压制动助力器产生附加的制动压力并且主动地辅助传统的真空制动助力,以便获得必要的或者说所期望的制动力,或者以便能够减小所述气动的制动助力器的结构体积。这种制动装置尤其结合ESP系统(ESP=Elektronisches Stabilitätsprogramm:电子稳定程序)是已知的,所述ESP系统通过车轮各自的制动干预来使机动车的行驶状态稳定。
根据上面所提及的公开文献到目前为止根据车辆特性、尤其根据车轮转速来选择用于液压制动助力的触发时刻。由此,所述液压制动助力通常以时间延迟的方式实现。
发明内容
具有权利要求1所述特征的、根据本发明的方法具有下述优点:与到目前为止相比还要更快速地识别紧急情况并且由此辅助驾驶员更快速地以其努力来使车辆减速。这根据本发明以下述方式实现:借助配属于气动的制动助力器的真空传感器来获取所述驾驶员制动期望并且调设液压制动助力。通过所述真空传感器可行的是,在没有设置此外在液压运行中所使用的压力传感器的情况下间接地推出驾驶员期望。在此尤其规定,将在系统中已经存在的通常用于马达控制/调节的真空传感器用于根据本发明的方法,从而不会产生用于其他传感器的附加成本。如果借助所述真空传感器来检测所述驾驶员制动期望,那么能够在车辆的车轮处的转速变化之前就已经引入了所述液压制动助力。由此实现了,特别快速地通过所述制动助力来辅助驾驶员。
根据本发明的一种有利的改进方案规定,将通过所述真空传感器所检测到的压力值与至少一个能够预先给定的第一极限值进行比较;并且在所述压力值超过所述第一极限值时调设第一制动助力。因此,仅当超过所述能够预先给定的第一极限值时才调设所述第一制动助力。由此以简单的方式和方法避免了所述制动助力的无意的或者过早的触发。所述压力值能够是通过所述真空传感器所直接检测到的压力或者是由此所推导出的参量。
此外优选规定,将所述通过所述真空传感器所检测到的压力值与能够预先给定的第二极限值进行比较;并且在超过所述第二极限值时调设第二制动助力,其中所述第二极限值高于所述第一极限值并且其中所述第二制动助力高于所述第一制动助力。也就是随着通过所述真空传感器所检测到的压力值的增大或者说随着在所述制动助力器的前室中的压力的增大提高所述制动助力。通过根据至少两个极限值来实现这些的方式,在此规定了所述制动助力的阶梯式的提高。
有利的是,此外优选规定,将所述通过所述真空传感器所检测到的压力值与能够预先给定的第三极限值进行比较;并且在超过所述第三极限值时调设第三制动助力,其中所述第三极限值高于所述第二极限值,并且所述第三制动助力高于所述第二制动助力。由此基本上得出之前已经提及的优点。通过设置至少三个极限值能够获得用于所述制动助力的足够好的分级。
此外优选规定,根据所述制动装置的磨损、使用寿命和/或运行温度来调设所述液压制动助力。如果例如在所述制动装置的运行中检测到:存在磨损现象,并且由此在操控不改变的情况下产生较小的制动力矩,那么相应地提高所述制动助力,以便补偿所述制动装置的磨损现象。有利的是,根据磨损、使用寿命和/或运行温度对所述制动助力的调设独立于下述实现:实际通过所述真空传感器所检测到的压力超过所述极限值中的哪一个极限值。
此外优选规定,根据实际的行驶道路坡度来调设所述液压制动助力。为此,例如持续借助加速度传感器和/或基于车辆的导航系统的数据来获取所述行驶道路坡度。如果在此检测到:车辆向上上坡,那么优选降低所述制动助力。如果检测到:车辆向下下坡,那么优选提高所述制动助力。由此实现了,对于驾驶员而言认识到始终相同的车辆制动特性。
具有权利要求7所述特征的、根据本发明的控制器的特征在于,所述控制器实施根据本发明的方法。在此特别优选的是,所述控制器是所述制动装置的组成部分。
附图说明
在下文中,本发明应借助附图得到进一步阐述。对此:
图1示出了用于运行机动车的制动装置的有利的方法并且
图2示出了制动助力器的借助真空传感器所检测到的前室压力与主制动缸压力之间的关联。
具体实施方式
图1示出了一种曲线图,借助所述曲线图用于运行车辆的制动装置的有利的方法应当得到阐述。对此,图1在曲线图中以关于时间t进行描述的方式示出了在实施制动过程时的车辆减速度ax、在所述制动装置的主制动缸中的压力pmc以及通过液压制动助力所附加地调设的制动压力ph。
在此认为,在时刻t0通过车辆司机来操纵所述制动装置的制动踏板。由此,所述主制动缸中的压力pmc根据所述制动踏板操纵上升直到时刻t2,在所述时刻t2所述制动踏板已经达到其通过驾驶员所调设的最终位置。在此所考虑的制动装置具有气动的制动助力器,所述气动的制动助力器以超出驾驶员所预先给定的制动压力的方式自动地提高所述制动压力。由此得出车辆减速度ax1。
在图1的下部示出了附加的压力ph,所述附加的压力通过所述液压制动助力器来调设。通常将车辆减速度用作接通标准。为此将实际的车辆减速度与例如极限值进行比较并且在达到所述极限值时通过所述液压制动助力器来附加地调设所述附加的制动压力,如在图1中所示出的那样,从而得出车辆减速度ax2(实线)。通过所述液压制动助力器引起的附加的制动助力在此仅从时刻t2起实现。
在此借助真空传感器来监控作用于所述气动的制动助力器上的负压。所述负压在此例如由机动车的内燃机的进气道或者由单独的真空泵得出,所述单独的真空泵相应地作用于所述气动的制动助力器上。
图2为此示出了所述气动的制动助力器的负压pv与所述主制动缸的压力pmc之间的关联。为此描述了这两个压力pv和pm关于时间t的情况。在时刻ta,当所述制动踏板被操纵时,通过所述真空传感器所检测的压力pv上升。所述主制动缸中的压力pmc同样增大。如果所述制动踏板处于其最终位置中,那么通过所述真空传感器所检测到的压力pv在时间段tb中又缓慢地减小,而所述主制动缸中的压力则被维持。如果驾驶员结束所述制动过程,其方式为:驾驶员例如在时刻tc将脚从所述制动踏板拿走,那么所检测到的负压上升到最大值上,而所述主制动缸中的压力又减小。
在此现在规定,基于由所述真空传感器所检测到的压力pv来调设或者说触发所述液压制动助力。如由图2可以看出,通过所述真空传感器所检测到的压力的变化几乎与所述制动踏板操纵同时实现。相应地,提供了特别早的信号以用于触发所述液压制动助力。因为在许多机动车中尤其为了马达调节而设置真空传感器已经是已知的,所以能够舍弃设置附加的传感器、尤其能够舍弃在所述制动装置的液压回路中设置压力传感器。在此将由所述真空传感器所检测到的压力pv与三个不同的极限值进行比较。随着压力值pv的增大,在此在超过相应的极限值时通过所述液压制动助力器来调设更高的制动助力。
通过所描述的处理方式从现在开始可行的是,与到目前为止相比显著更早地、即在时刻t21已经调设所述液压制动助力。这样在图1中以虚线的方式示出的是:通过所述液压制动助力提供的附加的制动压力ph *以及针对之前所描述的情况的车辆减速度ax2 *,在所述之前所描述的情况下,根据所述由所述真空传感器所检测到的压力来调设所述液压制动助力。在此可以看出,根据所述压力值不仅更早地、即在时刻t1而且还以更高的辅助性、即以更高的附加的制动压力ph *调设或者说能够调设所述制动助力。由此得出机动车的更早的并且更大的减速度ax2 *。
如在图1中所示出的那样,所述制动助力优选斜坡形地结束,其中随着时间的增大,所述斜坡的负坡度和增强优选阶梯式地减小。所述制动助力的斜坡形的降低尤其有助于行驶舒适性并且也依赖于还保持着的车速。在调设所述制动助力ph *时优选考虑实际的行驶道路坡度和/或所述制动装置的磨损,并且通过调设所述液压制动助力ph *来对其进行补偿。作为设置三个固定的能够预先给定的极限值以用于调设所述液压制动助力的替代方案,也能够设想的是,根据所述真空传感器的实际的压力值pv来调设连续的制动助力。
Claims (7)
1.用于运行车辆的、尤其机动车的液压制动装置的方法,所述液压制动装置具有至少一个制动助力器,所述制动助力器根据驾驶员制动期望来调设制动助力,其特征在于,借助配属于气动的制动助力器的真空传感器来获取所述驾驶员制动期望并且调设液压制动助力。
2.按权利要求1所述的方法,其特征在于,将通过所述真空传感器所检测到的压力值与至少一个能够预先给定的第一极限值进行比较;并且在超过所述第一极限值时调设第一制动助力。
3.按上述权利要求所述的方法,其特征在于,将所述通过所述真空传感器所检测到的压力值与能够预先给定的第二极限值进行比较;并且在超过所述第二极限值时调设第二液压制动助力,其中所述第二极限值高于所述第一极限值并且所述第二制动助力高于所述第一制动助力。
4.按上述权利要求所述的方法,其特征在于,将所述通过所述真空传感器所检测到的压力值与能够预先给定的第三极限值进行比较;并且在超过所述第三极限值时调设第三液压制动助力,其中所述第三极限值高于所述第二极限值并且所述第三制动助力高于所述第二制动助力。
5.按上述权利要求中任一项所述的方法,其特征在于,根据所述制动装置的磨损、使用寿命和/或运行温度来调设所述液压制动助力。
6.按上述权利要求中任一项所述的方法,其特征在于,根据实际的行驶道路坡度来调设所述液压制动助力。
7.控制器、尤其制动系统控制器,其特征在于构造用于实施按权利要求1到6中任一项所述的方法。
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PCT/EP2015/063515 WO2016015916A1 (de) | 2014-07-29 | 2015-06-17 | Verfahren zum betreiben einer bremseinrichtung, steuergerät |
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