CN109760684B - 怠速停止和启动系统的控制方法 - Google Patents
怠速停止和启动系统的控制方法 Download PDFInfo
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- CN109760684B CN109760684B CN201810722768.8A CN201810722768A CN109760684B CN 109760684 B CN109760684 B CN 109760684B CN 201810722768 A CN201810722768 A CN 201810722768A CN 109760684 B CN109760684 B CN 109760684B
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Abstract
本发明提供了怠速停止和启动系统的控制方法。所述方法包括确定怠速状态下运转的发动机的停止条件是否满足,并且在发动机的停止条件满足时,确定在预先设定的时间段期间形成的制动液的压力增加值是否大于预先设定的值。然后,临时地关闭连接至传输制动液压力的液压管线的阀,并且当压力增加值大于预先设定的值时,重新打开阀。临时地关闭并重新打开阀以后,发动机停止。
Description
与相关申请的交叉引用
本申请要求2017年11月7日提出的韩国专利申请No.10-2017-0147520的优先权和权益,并通过引用将其全文纳入本文。
技术领域
本发明涉及怠速停止和启动系统的控制方法,所述控制方法在发动机以怠速状态旋转时满足停止条件的时候,通过使发动机停止运转来减少排放气体和燃料消耗,并且在发动机的停止状态下,当满足解除条件时,重新启动发动机。
背景技术
通常情况下,即使在车辆停止时,发动机也继续运转,因此燃料会继续消耗,这进一步地加重了空气环境的污染。相应地,对怠速停止和启动(idle stop and go,ISG)系统已经进行了研究以减少车辆的燃料消耗并且保护环境。在车辆停止并且满足特定条件时,ISG系统使发动机停止而不是使发动机保持在怠速状态。在车辆的驾驶员接合离合踏板或松开制动踏板时,ISG系统自动地重新启动发动机。
ISG系统能有效的改善车辆的燃料经济性,减少排放气体,并且延长包括发动机油在内的各种消耗部件的消耗周期。基于车辆的类型或车辆的制造商,在ISG系统中的发动机的停止条件可能是不同的。例如,可以检测驱动信息,其包括:车辆的换挡档位、车辆速度、发动机转速、制动踏板的操作、蓄电池的充电状态(SOC)、蓄电池电压以及冷却剂温度,并且发动机可以基于检测到的驾驶信息进入发动机的停止模式。
涉及ISG系统的技术已经进行了研究。根据相关技术,在ISG系统中,检测并分析行驶信息以确定发动机的停止条件是否满足。响应于确定发动机的停止条件得到满足,ISG系统的控制器使发动机停止运转。
在发动机停止模式中,监测行驶信息,以确定基于驾驶员的意图的第一解除条件是否满足。当检测到制动踏板的操作或检测到加速踏板的操作时,可以满足第一解除条件。当满足第一解除条件时,控制器重新启动发动机。当第一解除条件不满足时,确定第二解除条件是否满足。
具体地,第二解除条件可以利用氧化催化设备(DOC)的温度、冷却剂温度、发动机油温度、蓄电池的充电状态(SOC)以及制动液压力来确定。当第二解除条件不满足时,一直保持怠速停止模式。当第二解除条件满足时,发动机不管驾驶员的意图如何都重新启动发动机。
可能有一种情况,在ISG系统的操作按钮接通的状态下,即使满足发动机的停止条件,也想要使发动机运转。相应地,需要驾驶员关断操作按钮,然后再接通操作按钮。因此,正在进行以下研究,利用驾驶员操作制动踏板的行为来控制ISG系统的运行,并且利用制动踏板通知驾驶员ISG系统的运行状态。
公开于本部分的上述信息仅仅用于加深对发明背景的理解,因此其可以包含的信息并不构成在本国已为本领域技术人员所公知的现有技术。
发明内容
本发明致力于提供一种怠速停止和启动系统的控制方法,所述控制方法在驾驶员接通怠速停止开关的状态下,即使当发动机的停止条件满足时,利用制动踏板也能够使发动机运转,从而能够提高驾驶员的便利性。
本发明的示例性的实施方案提供怠速停止和启动系统的控制方法,所述方法可以包括:通过控制器确定怠速状态下运转的发动的停止条件是否满足;在发动机的停止条件满足时,通过控制器确定在预先设定的时间段期间产生的制动液的压力增加值是否大于预先设定的值;在压力增加值大于预先设定的值时,通过控制器将连接至传输制动液压力的液压管线的阀临时地关闭,并且将所述阀重新打开;并且在所述阀临时地关闭并重新打开以后,通过控制器使发动机停止。
所述阀可以是常开阀,其设置在将由制动踏板产生的制动液压力传输至制动器的液压管线上。所述阀可以是总切断阀(total cut valve),其设置在将由制动踏板产生的制动液压力传输至制动器的液压管线上。发动机的停止条件可以通过下述的至少一项因素确定的:车辆的速度、蓄电池电压、发动机启动以后过去的时间、发动机的旋转速度、加速踏板的操作状态、发动机油温度、变速器的换挡档位、制动踏板的操作状态。控制方法可以进一步包括:通过控制器确定发动机的重新启动条件是否满足。控制器可以配置为当重新启动条件满足时,使发动机重新启动。
本发明的另一个示例性实施方案提供的怠速停止和启动系统的控制方法可以包括:通过控制器确定怠速状态下运转的发动机的停止条件是否满足;在发动机的停止条件满足时,通过控制器确定在预先设定的时间段期间产生的制动液的压力增加值是否大于预先设定的值;在压力增加值大于预先设定的值时,通过控制器临时地改变制动液的压力;在临时地改变制动液的压力以后,通过控制器使发动机停止。
控制器可以配置为将连接至传输制动液压力的液压管线的阀临时地关闭,并且将所述阀重新打开,从而临时地改变制动液的压力。压力增加值可以由设置在液压管线上的压力传感器进行感测。发动机的停止条件可以通过下述的至少一项因素确定的:车辆的速度、蓄电池电压、发动机启动以后过去的时间、发动机的旋转速度、加速踏板的操作状态、发动机油温度、变速器的换挡档位以及制动踏板的操作状态。
控制方法可以进一步包括:通过控制器确定发动机的重新启动条件是否满足。控制器可以配置为当满足重新启动条件时,使发动机重新启动。在以下情况下,发动机的停止条件满足:车辆的速度是0,蓄电池电压等于或大于预先设定的值,发动机启动以后过去的时间等于或大于预先设定的值,发动机的旋转速度包含在怠速区间内,发动机油温度等于或大于预先设定的值,加速踏板没有被操作,或者制动踏板被操作。在以下情况下,发动机的重新启动条件满足:发动机油温度小于预先设定的值,蓄电池电压小于预先设定的值,冷却剂温度小于预先设定的值,排出气体催化器的前端温度小于预先设定的值,加速踏板被操作,或者制动踏板没有被操作。
根据本发明的示例性实施方案,可以通过驾驶员对制动踏板的操作深度进行调节以使发动机在怠速停止条件下停止或启动。例如,当驾驶员使制动踏板最大程度地接合时,可以使发动机在怠速停止条件下停止。当驾驶员使制动踏板最小程度地接合时,即使在怠速停止条件下,也可以使发动机保持在怠速状态而不使发动机停止。
附图说明
通过随后结合附图所呈现的具体描述将更为清楚地理解本发明的以上和其它目的、特征以及优点,其中:
图1为根据本发明的示例性实施方案的怠速停止和启动系统的配置图;
图2为根据本发明的示例性实施方案的怠速停止和启动系统中的ESC单元的液压回路的图;
图3为显示根据本发明的示例性实施方案的怠速停止和启动系统的控制方法的整体流程图;
图4为显示根据本发明的示例性实施方案的怠速停止和启动系统的控制方法的详细的流程图。
附图标记说明:
415:制动踏板
417:增压组件
100:ESC单元
436:前轮制动器
435:后轮制动器
115:发动机
110:控制器
418:压力传感器
425:NO阀
412:TC阀。
具体实施方式
应当理解,此处所使用的术语“车辆”或“车辆的”或其它类似术语一般包括机动车辆,例如包括运动型多用途车辆(SUV)、大客车、卡车、各种商用车辆的乘用汽车,包括各种舟艇、船舶的船只,航空器等等,并且包括混合动力车辆、电动车辆、插电式混合动力电动车辆、氢动力车辆以及其它替代性燃料车辆(例如源于非石油能源的燃料)。
虽然示例性的实施方案描述为使用多个单元以执行示例性的过程,但是可以理解示例性过程也可以通过一个或多个模块执行。此外,可以理解术语控制器/控制单元指包括存储器和处理器的硬件设备。该存储器配置为储存模块,并且处理器具体配置为执行所述模块以执行以下进一步描述的一个或多个过程。
此外,本发明的控制逻辑可以实施为计算机可读介质上的非瞬态计算机可读介质,其包含由处理器、控制器/控制单元等执行的可执行程序指令。计算机可读介质的示例包括但不限于ROM、RAM、光碟(CD)-ROM、磁带、软盘、闪盘驱动器、智能卡和光学数据存储设备。计算机可读记录介质还可以分布在网络连接的计算机系统上,使得计算机可读介质例如通过远程信息处理服务器或控制器区域网络(CAN)以分布方式存储和执行。
本文所使用的术语仅用于描述具体实施方案的目的,并非旨在限制本发明。正如本文所使用的,单数形式“一”、“一个”和“该”旨在也包括复数形式,除非上下文另有清楚地指示。进一步可理解地,当在本说明书中使用词语“包括”和/或“包含”时,特指所陈述的特征、数值、步骤、操作、元件和/或组件存在,但不排除存在或额外存在一个或多个其它特征、数值、步骤、操作、元件、组件和/或及其组合。正如本文所使用的,术语“和/或”包括一种或多种相关列举项的任何和所有组合。
除非特别声明或者从上下文显而易见的,本文所使用的术语“约”被理解为在本领域的正常公差范围内,例如在平均2个标准偏差内。“约”可被理解为在指定值的10%、9%、8%、7%、6%、5%、4%、3%、2%、1%、0.5%、0.1%、0.05%或0.01%之内。除非从上下文清楚的,本文提供的所有数值通过术语“约”修改。
下面将参考附图对本发明的示例性具体实施方案进行详细描述。图中所示的构造的尺寸和厚度选择性地提供从而便于说明,因此本发明并不限于图中所示的那些,并且夸大了厚度使得某些部件和区域更为清楚。
然而,省略与描述无关的部分从而清楚描述本发明的示例性实施方案,并且在整个说明书中相同的附图标记表示相同的元件。在以下描述中,因为组件的名称彼此相同,所以组件的名称分为第一、第二等等以区分名称,并且顺序不特别地限于此。
图1为根据本发明的示例性实施方案的怠速停止和启动系统的配置图。参考图1,怠速停止和启动系统可以包括制动踏板415、增压组件417、电子稳定控制器(electronicstability controller,ESC)单元100、控制器(或控制单元)110、发动机115以及制动器434。
具体地,制动器434可以包括前轮制动器436和后轮制动器435,并且可以是由车辆的驾驶员操作的组件。增压组件417可以基于制动踏板415的操作增加制动液(或刹车油)的压力。ESC单元100可以利用阀调节由增压组件417产生的液压压力,以转换为分配至前轮制动器436和后轮制动器435的液压。ESC单元100可以配置为接收驱动信息,并且可以经由控制器局域网络(CAN)通信连接至控制器110,其中驾驶信息包括:车辆速度、车辆的蓄电池电压、发动机启动以后过去的时间、发动机的旋转速度(例如,发动机的每分钟转数(RPM))、发动机油温度、加速踏板的操作状态、制动踏板415的操作状态、变速器的换挡档位、冷却剂温度或催化器(例如排放气体催化器)的前端温度(例如入口温度)。蓄电池可以用于启动车辆。
控制器110可以配置为基于驾驶信息操作ESC单元100以执行发动机115的启动和停止。发动机115可以通过起动电机启动,并且可以通过阻止喷射器的燃料喷射而停止。由增压组件417产生的制动液压压力可以增加到与驾驶员接合制动踏板415的程度相称。控制器110可以配置为确定怠速状态下运转的发动机115的停止条件是否满足。当发动机115的停止条件满足时,控制器110可以配置为确定压力增加值ΔP是否大于预先设定的值(例如3bar)。
当压力增加值ΔP大于预先设定的值时,控制器110可以配置为将设置在图2的液压管线200(液压管线200将制动液的压力传输至制动器)上的阀临时地关闭,制动液然后,可以将阀重新打开。在阀临时地关闭并再次打开以后,发动机可以停止。阀可以是图2中的NO阀(例如,常开阀)425或TC阀(例如,总切断阀或牵引控制阀)412。例如,控制器110可以是一个或多个由程序操作的微处理器或者是包括微处理器的硬件。程序可以包括用于执行根据本发明的示例性的实施方案的方法的一系列指令,这将在下面进行描述。所述指令可以储存在存储器中。
在本发明的示例性实施方案中没有描述的部件可以是已知的技术和产品。本发明的示例性实施方案可以选择性地包括已知的技术。图2为根据本发明的示例性实施方案的怠速停止和启动系统中的ESC单元的液压回路的图。参考图2,ESC单元100可以是主元件,并且可以包括制动踏板415、增压组件417、压力传感器418、TC阀412、ES阀(例如,电子梭阀)420、NO阀425、NC阀(例如,常闭阀)430、后轮制动器435、前轮制动器436、液压压力储存单元400、油泵405以及电机410。
当制动踏板415接合或有操作时,ES阀420可以打开,并且通过增压组件417增压的制动液可以通过ES阀420移动到油泵405的吸入侧。油泵405可以通过电机410而操作以泵送制动液。NC阀430可以关闭并且NO阀425可以打开以使泵送的油将制动力施加至后轮制动器435和前轮制动器436。基于NC阀430、TC阀412或NO阀425的瞬间的打开/关闭的操作,制动液的压力可以瞬间减小或增加。
此外,压力传感器418可以配置为感测从增压组件417排出的制动液在液压管线200中形成的液压压力,并且可以配置为将感测的信号传送至控制器110。在本发明的另一个示例性的实施方案中,ESC单元100不限于图2所描述的制动液的液压回路,并且ESC单元100可以选择性地包括已知的液压回路。
图3为显示根据本发明的示例性实施方案的怠速停止和启动系统的控制方法的整体流程图。参考图3,在步骤S300,控制器110可以配置为确定怠速状态下运转的发动机115的停止条件是否满足。在步骤S310,控制器110可以配置为确定根据制动踏板415的操作而产生的制动液的压力增加值ΔP是否大于预先设定的值。压力增加值ΔP可以通过压力传感器418进行感测。
在步骤S320,控制器110可以配置为将TC阀412或NO阀425临时地关闭,然后将TC阀412或NO阀425重新打开。在步骤S330,控制器110可以配置为使怠速状态下运转的发动机115停止。控制器110可以配置为阻止经由燃料喷射喷射器的燃料喷射。对本领域的技术人员来说如何阻止喷射器的燃料喷射是显而易见的,因此省略说明。
图4为显示根据本发明的示例性实施方案的怠速停止和启动系统的控制方法的详细的流程图。参考图4,在步骤S400,发动机115可以运转,并且可以启动控制。在步骤S410,控制器110可以配置为基于驱动信息确定怠速状态下运转的发动机115怠速停止条件是否满足。
在步骤S420,当发动机的怠速停止条件满足时,控制器110可以配置为测量从增压组件417排出的并且在液压管线200中形成的制动液压压力。在步骤S430,控制器110可以配置为计算在预先设定的时间段(例如,0.5秒)期间形成的压力增加值ΔP,并且确定压力增加值ΔP是否大于预先设定的值。当压力增加值ΔP等于或小于预先设定的值时,可以重复步骤S420。当压力增加值ΔP大于预先设定的值时,可以执行步骤S440。
在步骤S440,控制器110可以配置为在预先设定的时间段内将NO阀420或TC阀412临时地关闭,并且将阀再次打开以临时地改变制动液的压力。在步骤S450,控制器110可以配置为中断来自喷射器的燃料喷射以使怠速状态下运转的发动机115停止运转。在步骤S460,控制器110可以配置为确定重新启动条件是否满足。当重新启动条件不满足时,可以重复步骤S450。当重新启动条件满足时,控制器110可以配置为在步骤S470重新启动发动机115。
在本发明的示例性的实施方案中,驾驶员可以利用步骤S440的操作,接收来自制动踏板415的物理感受(例如咔嗒咔嗒的信号)输入。物理感受和怠速停止条件可以使发动机停止。当怠速停止条件满足时,驾驶员可以调节制动踏板415的接合深度以使发动机115停止或使发动机115保持在怠速状态。例如,当驾驶员最大程度地接合制动踏板415时,发动机115可以在怠速停止条件下停止。当驾驶员最小程度地接合制动踏板415时,发动机可以保持怠速状态,即使在怠速停止条件下也不使发动机停止。
在本发明的示例性的实施方案中,当制动踏板415的操作深度最大时,由增压组件417产生的制动液压压力的增加,这对本领域技术人员来说是显而易见的,因此省略说明。在本发明的示例性的实施方案中,在以下情况下,发动机115的怠速停止条件可以满足:车辆的速度是0,蓄电池电压等于或大于预先设定的值(例如11V),发动机启动以后过去的时间等于或大于预先设定的值,发动机的旋转速度在怠速区域内,发动机油温度等于或大于预先设定的值,加速踏板没有操作或分离,并且/或者制动踏板415被操作。
在以下情况下,发动机115的重新启动的条件可以满足:发动机油温度小于预先设定的值,蓄电池电压小于预先设定的值,冷却剂温度小于预先设定的值,排放气体催化器的前端温度小于预先设定的值,加速踏板被操作,或者制动踏板415没有被操作。
虽然参考目前被视为是示例性实施方案的实施方案来描述本发明,但应理解本发明并不限于所描述的实施方案,相反,本发明旨在覆盖包括在所附权利要求的精神和范围之内的各种修改形式和等效形式。
Claims (16)
1.一种怠速停止和启动系统的控制方法,其包括:
通过控制器确定怠速状态下运转的发动机的停止条件是否满足;
在发动机的停止条件满足时,通过控制器确定在预先设定的时间段期间产生的制动液的压力增加值是否大于预先设定的值;
在压力增加值大于预先设定的值时,通过控制器将连接至传输制动液压力的液压管线的阀临时地关闭,并且将所述阀重新打开;
在所述阀临时地关闭并重新打开以后,通过控制器使发动机停止。
2.根据权利要求1所述的怠速停止和启动系统的控制方法,其中,所述阀是常开阀,其设置在将由制动踏板产生的制动液压力传输至制动器的液压管线上。
3.根据权利要求1所述的怠速停止和启动系统的控制方法,其中,所述阀是总切断阀,其设置在将由制动踏板产生的制动液压力传输至制动器的液压管线上。
4.根据权利要求1所述的怠速停止和启动系统的控制方法,其中,发动机的停止条件是通过下述的至少一项因素确定的:车辆的速度、蓄电池电压、发动机启动以后过去的时间、发动机的旋转速度、加速踏板的操作状态、发动机油温度、变速器的换挡档位、制动踏板的操作状态。
5.根据权利要求1所述的怠速停止和启动系统的控制方法,进一步包括:
通过控制器确定发动机的重新启动条件是否满足。
6.根据权利要求5所述的怠速停止和启动系统的控制方法,其中,所述控制器配置为:当重新启动条件满足时,使发动机重新启动。
7.一种怠速停止和启动系统的控制方法,其包括:
通过控制器确定怠速状态下运转的发动机的停止条件是否满足;
在发动机的停止条件满足时,通过控制器确定在预先设定的时间段期间产生的制动液的压力增加值是否大于预先设定的值;
在压力增加值大于预先设定的值时,通过控制器临时地改变制动液的压力;
在临时地改变制动液的压力以后,通过控制器使发动机停止。
8.根据权利要求7所述的怠速停止和启动系统的控制方法,进一步包括:
通过控制器将连接至传输制动液压力的液压管线的阀临时地关闭,并且将所述阀重新打开,从而临时地改变制动液的压力。
9.根据权利要求8所述的怠速停止和启动系统的控制方法,其中,压力增加值由设置在液压管线上的压力传感器进行检测。
10.根据权利要求7所述的怠速停止和启动系统的控制方法,其中,发动机的停止条件是通过下述的至少一项因素确定的:车辆的速度、蓄电池电压、发动机启动以后过去的时间、发动机的旋转速度、加速踏板的操作状态、发动机油温度、变速器的换挡档位以及制动踏板的操作状态。
11.根据权利要求7所述的怠速停止和启动系统的控制方法,进一步包括:
通过控制器确定发动机的重新启动条件是否满足。
12.根据权利要求11所述的怠速停止和启动系统的控制方法,其中,所述控制器配置为:当重新启动条件满足时,使发动机重新启动。
13.根据权利要求7所述的怠速停止和启动系统的控制方法,其中,在以下情况下,发动机的停止条件满足:车辆的速度是0,蓄电池电压等于或大于预先设定的值,发动机启动以后过去的时间等于或大于预先设定的值,发动机的旋转速度在怠速区间内,发动机油温度等于或大于预先设定的值,加速踏板没有被操作,或者制动踏板被操作。
14.根据权利要求12所述的怠速停止和启动系统的控制方法,其中,在以下情况下,发动机的重新启动条件满足:发动机油温度小于预先设定的值,蓄电池电压小于预先设定的值,冷却剂温度小于预先设定的值,排放气体的催化器的前端温度小于预先设定的值,加速踏板被操作,或者制动踏板没有被操作。
15.一种怠速停止和启动系统,其包括:
制动踏板;
增压组件,其配置为基于所述制动踏板的操作增加制动液的压力;
电子稳定控制器单元,其配置为操作阀以调节由所述增压组件产生的液压压力,以便转换为分配至制动器的液压;
控制器,其配置为基于由所述电子稳定控制器单元收集的驱动信息操作电子稳定控制器单元以执行发动机的启动和停止;
其中,由所述电子稳定控制器单元收集的驱动信息包括:车辆速度、车辆的蓄电池电压、发动机启动以后过去的时间、发动机的旋转速度、发动机油温度、加速踏板的操作状态、制动踏板的操作状态、变速器的换挡档位、冷却剂温度;
所述控制器配置为:
确定怠速状态下运转的发动机的停止条件是否满足;
在发动机的停止条件满足时,确定在预先设定的时间段期间产生的制动液的压力增加值是否大于预先设定的值;
在压力增加值大于预先设定的值时,将连接至传输制动液压力的液压管线的阀临时地关闭,并且将所述阀重新打开;
在所述阀临时地关闭并重新打开以后,使发动机停止。
16.根据权利要求15所述的怠速停止和启动系统,其中,所述发动机的停止条件通过由所述电子稳定控制器单元收集的驱动信息中的至少一项确定。
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