CN110821688B - 内燃机的控制装置及方法 - Google Patents
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 77
- 239000000446 fuel Substances 0.000 claims abstract description 172
- 239000000203 mixture Substances 0.000 claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 239000003054 catalyst Substances 0.000 claims description 31
- 239000007789 gas Substances 0.000 description 23
- 239000013618 particulate matter Substances 0.000 description 11
- 238000001514 detection method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/101—Three-way catalysts
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- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/025—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/045—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions combined with electronic control of other engine functions, e.g. fuel injection
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- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
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- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/08—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing
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- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
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Abstract
提供一种内燃机的控制装置及方法。控制装置在内燃机的曲轴正在旋转的状态下,执行使包含燃料喷射阀喷射出的燃料的混合气不在汽缸中燃烧而向排气通路导入的燃料导入处理。另外,控制装置在燃料导入处理的执行中执行在非燃烧点火正时实施火花塞的火花放电的放电处理。非燃烧点火正时是即使实施火花塞的火花放电在汽缸中混合气也不会燃烧的期间内的正时。
Description
技术领域
本发明涉及内燃机的控制装置及方法。
背景技术
美国专利申请公开第2014/41362号公开了一种火花点火式的内燃机。该内燃机具备三元催化剂和捕集颗粒物的捕集器。三元催化剂设置于排气通路。捕集器配置于比三元催化剂靠下游的排气通路。
在美国专利申请公开第2014/41362号中,在车辆的惯性行驶中,通过实施用于将三元催化剂升温的燃料导入处理,堆积于捕集器的颗粒物燃烧而被净化。在燃料导入处理中,通过在车辆为惯性行驶中且曲轴正在旋转时在停止了火花塞的火花放电的状态下喷射燃料,混合气没有在汽缸中燃烧便导入排气通路。导入到排气通路的未燃的混合气向三元催化剂流入,在三元催化剂中燃烧。当通过因该燃烧而产生的热而三元催化剂的温度被提高后,从三元催化剂向捕集器流入的气体的温度变高。然后,当接受高温的气体的热而捕集器的温度上升为颗粒物的着火点以上时,堆积于捕集器的颗粒物燃烧而被净化。
在美国专利申请公开第2014/41362号中,在燃料导入处理的执行中喷射燃料,另一方面,停止火花塞的火花放电。因而,在燃料导入处理的执行中,火花塞的电极的温度下降。因而,从燃料喷射阀喷射出的燃料容易附着于火花塞的电极而碳化。附着于火花塞的电极的碳难以通过电极的热而燃烧除去。其结果,可能会产生火花塞的闷烧。若在燃料导入处理的执行中产生火花塞的闷烧,则例如在燃料导入处理结束后再次开始汽缸中的混合气的燃烧时混合气可能会不点火而失火。
发明内容
为了解决上述课题,根据本发明的第一方案,提供一种内燃机的控制装置。内燃机具备:燃料喷射阀;汽缸,被导入包含燃料喷射阀喷射出的燃料的混合气;火花塞,通过火花放电来对导入到汽缸的混合气进行点火;排气通路,供从汽缸内排出来的气体流动;及三元催化剂,设置于排气通路。控制装置构成为,在内燃机的曲轴正在旋转的状态下,执行使包含燃料喷射阀喷射出的燃料的混合气不在汽缸中燃烧而向排气通路导入的燃料导入处理,在燃料导入处理的执行中,执行在非燃烧点火正时实施火花塞的火花放电的放电处理。非燃烧点火正时是即使实施火花塞的火花放电在汽缸中混合气也不会燃烧的期间内的正时。
为了解决上述课题,根据本发明的第二方案,提供一种内燃机的控制方法。内燃机具备:燃料喷射阀;汽缸,被导入包含燃料喷射阀喷射出的燃料的混合气;火花塞,通过火花放电来对导入到汽缸的混合气进行点火;排气通路,供从汽缸内排出来的气体流动;及三元催化剂,设置于排气通路。控制方法包括如下步骤:在内燃机的曲轴正在旋转的状态下,执行使包含燃料喷射阀喷射出的燃料的混合气不在汽缸中燃烧而向排气通路导入的燃料导入处理;及在燃料导入处理的执行中,执行在非燃烧点火正时实施火花塞的火花放电的放电处理。非燃烧点火正时是即使实施火花塞的火花放电在汽缸中混合气也不会燃烧的期间内的正时。
附图说明
图1是示出内燃机的控制装置的一实施方式中的构成的示意图。
图2是示出燃料导入处理的处理步骤的流程图。
图3是示出在燃料导入处理的实施中设定的点火正时的时间图。
图4是示出燃料导入处理的实施方案的时间图。
具体实施方式
以下,关于内燃机的控制装置的一实施方式,参照图1~图4来说明。
如图1所示,搭载于车辆的内燃机10具备将活塞11以能够往复运动的方式收容的汽缸12。活塞11经由连杆13而连结于曲轴14。汽缸12内的活塞11的往复运动被变换为曲轴14的旋转运动。
在汽缸12上连接有向汽缸12导入空气的进气通路15。在进气通路15设置有检测在进气通路15中流动的空气的流量(吸入空气量GA)的空气流量计16。在比空气流量计16靠下游侧的进气通路15设置有节气门17。在比节气门17靠下游侧的进气通路15设置有燃料喷射阀18。通过燃料喷射阀18向在进气通路15中流动的空气中喷射燃料而形成空气与燃料的混合气。
在汽缸12设置有相对于汽缸12开闭进气通路15的进气门19。根据进气门19的打开而从进气通路15向汽缸12导入混合气。另外,在汽缸12设置有通过火花放电来对汽缸12内的混合气进行点火而使其燃烧的火花塞20。在火花塞20的顶端设置有火花放电用的电极。
在汽缸12上连接有排出因混合气的燃烧而产生的排气的排气通路21。另外,在汽缸12设置有相对于汽缸12开闭排气通路21的排气门22。根据排气门22的打开而从汽缸12内向排气通路21导入排气。在排气通路21设置有在将排气中的CO、HC氧化的同时将NOx还原的三元催化剂23。另外,在比三元催化剂23靠下游侧的排气通路21设置有捕集排气中的颗粒物的捕集器24。而且,在比三元催化剂23靠上流侧的排气通路21设置有空燃比传感器25。空燃比传感器25检测在排气通路21中流动的气体的氧浓度即混合气的空燃比。另外,在三元催化剂23与捕集器24之间的排气通路21设置有催化剂出气体温度传感器26。催化剂出气体温度传感器26检测从三元催化剂23流出来的气体的温度即催化剂出气体温度THC。
内燃机10的控制装置27具备中央处理装置(以下,称作CPU)27A和存储有控制用的程序、数据的存储器27B。通过CPU27A执行存储于存储器27B的程序来执行各种内燃机控制。
对控制装置27输入来自空气流量计16、空燃比传感器25、催化剂出气体温度传感器26的检测信号。另外,对控制装置27输入来自检测曲轴14的旋转角即曲轴角θc的曲轴角传感器28的检测信号。而且,对控制装置27也输入来自检测车辆的行驶速度即车速V的车速传感器29及检测加速器踏板30的操作量即加速器开度ACC的加速器位置传感器31的检测信号。
控制装置27基于来自这些传感器的检测结果,控制节气门17的开度、燃料喷射阀18的燃料喷射的量和正时、火花塞20的火花放电的实施正时(点火正时)等,从而根据车辆的行驶状况控制内燃机10的运转状态。另外,控制装置27根据曲轴角传感器28对曲轴角θc的检测结果来运算内燃机10的转速(内燃机转速NE)。
而且,控制装置27为了将设置于排气通路21的三元催化剂23升温而实施燃料导入处理。在燃料导入处理中,包含从燃料喷射阀18喷射出的燃料的混合气不在汽缸12中燃烧而向排气通路21导入。要想将包含燃料喷射阀18喷射出的燃料的混合气向排气通路21导入,需要在汽缸12中进行着进气排气。因而,控制装置27在曲轴14正在旋转且在汽缸12中进行着进气排气时实施燃料导入处理。在本实施方式中,以捕集器24的堵塞的防止为目的而实施燃料导入处理。
图2示出燃料导入处理的步骤。图2所示的一系列处理通过在控制装置27的起动中由CPU27A以规定的控制周期反复执行存储于存储器27B的程序来实现。以下,利用开头标注了“S”的数字来表现步骤编号。
当开始本处理后,CPU27A首先判定燃料导入处理的实施标志是否处于设立状态(S100)。在燃料导入处理的实施标志处于清除状态的情况下(S100:否),CPU27A暂且结束本处理。另一方面,在实施标志处于设立状态的情况下(S100:是),CPU27A使处理进入S110。在燃料导入处理的实施标志处于设立状态的情况下,燃料导入处理的实施条件成立。在燃料导入处理的实施标志处于清除状态的情况下,燃料导入处理的实施条件不成立。在本实施方式中,在满足下述的条件(A)~条件(C)中的全部的情况下,燃料导入处理的实施条件成立,设立燃料导入处理的实施标志。另一方面,在不满足下述的条件(A)~条件(C)中的任一个的情况下,燃料导入处理的实施条件不成立,清除燃料导入处理的实施标志。
(A)燃料切断执行标志处于设立状态。燃料切断执行标志是表示在车辆的惯性行驶中停止燃料喷射阀18的燃料喷射及火花塞20的火花放电而使内燃机10的燃烧运转停止的标志。即,燃料切断执行标志是表示减速时燃料切断的执行条件成立的标志。具体而言,在加速器开度ACC为0且车速V为一定的值以上的情况下,CPU27A设立燃料切断执行标志。当燃料切断执行标志设立后,CPU27A停止内燃机10的燃烧运转。并且,在燃料切断执行标志设立后加速器踏板30被踩踏而要求了车辆的再加速的情况或车速V下降为规定的恢复速度以下的情况下,CPU27A清除燃料切断执行标志。在清除了燃料切断执行标志的状态下,CPU27A实施内燃机10的燃烧运转。
在车辆的惯性行驶中,在内燃机10的燃烧运转停止的状态下曲轴14进行着旋转,因此是适合于燃料导入处理的实施的状态。
(B)正在要求三元催化剂23的升温。如上所述,在本实施方式中,为了以堆积于捕集器24的颗粒物的燃烧净化为目的的三元催化剂23的升温而实施燃料导入处理。CPU27A根据内燃机10的运转状态来推定堆积于捕集器24的颗粒物的量,在推定出的颗粒物的量超过了一定的值时要求三元催化剂23的升温。
(C)从排气通路21内扫出了已燃气体。在内燃机10的燃烧刚停止后,在排气通路21内残留有已燃气体。在本实施方式中,在排气通路21内的气体从已燃气体置换为空气后,开始燃料导入处理。具体而言,基于减速时燃料切断持续了一定的时间以上,CPU27A判定从排气通路21内扫出了已燃气体。
当设立了燃料导入处理的实施标志(S100:是)而结果处理进入S110后,CPU27A实施燃料喷射阀18的燃料喷射(S110)。此时的燃料喷射阀18的燃料喷射量以使混合气的空燃比比理论空燃比稀的方式控制。
另外,配合S110中的燃料喷射的实施,CPU27A实施火花塞20的火花放电(S120),暂且结束本处理。在S120中实施的火花放电的正时即点火正时被设定为即使使火花塞20产生火花放电在汽缸12中混合气也不会点火而不会燃烧的正时(以下,称作非燃烧点火正时)。具体而言,非燃烧点火正时AOPinj是以下的期间内的正时。
如图3所示,能够通过火花塞20的火花放电来进行汽缸12内的混合气的点火的正时限定于汽缸12的缸内压为混合气的点火所需的最低压即点火要求压α以上的压缩上止点附近的期间。因此,若是缸内压比点火要求压α低的期间,则即使使火花塞20产生火花放电,在汽缸12内混合气也不会点火而不会燃烧。
于是,在本实施方式中,将缸内压比点火要求压α低的期间内的正时设定为非燃烧点火正时AOPinj。更具体而言,将缸内压比点火要求压α低且压缩上止点后180°(排气下止点)的正时设定为非燃烧点火正时AOPinj。在本处理中,S120的处理相当于在燃料导入处理的执行中在非燃烧点火正时实施火花塞的火花放电的放电处理。
在燃料切断执行标志处于设立状态,燃料导入处理的实施标志处于清除状态的情况下,CPU27A执行内燃机10的减速时燃料切断。即,为了执行减速时燃料切断,CPU27A停止燃料喷射阀18的燃料喷射,并且停止火花塞20的火花放电。在这样燃料切断执行标志处于设立状态的情况下,实施减速时燃料切断及燃料导入处理中的任一个,因此内燃机10的燃烧运转停止。
说明本实施方式的作用及效果。
图4示出本实施方式中的燃料导入处理的实施方案的一例。在图4中,在时刻t1~时刻t3的期间,燃料切断执行标志处于设立状态,在此期间,在内燃机10的燃烧运转停止的状态下曲轴14进行着旋转。
当在时刻t1设立了燃料切断执行标志时,停止火花塞20的火花放电及燃料喷射阀18的燃料喷射,开始内燃机10的减速时燃料切断。然后,在排气通路21的扫气完成的时刻t2设立燃料导入处理的实施标志。
当在时刻t2设立了燃料导入处理的实施标志时,开始燃料喷射阀18的燃料喷射。另外,此时,也开始火花塞20的火花放电。此时的点火正时被设定为非燃烧点火正时AOPinj。因而,燃料喷射阀18喷射出的燃料没有在汽缸12中燃烧而保持未燃的状态向排气通路21排出。即,导入到汽缸12的燃料与空气的混合气没有在汽缸12内燃烧而保持未燃的状态向排气通路21导入。导入到排气通路21的未燃的混合气向三元催化剂23流入,在三元催化剂23中燃烧。通过因该燃烧而产生的热使三元催化剂23的温度(以下,记为催化剂温度)提高。当催化剂温度变高时,从三元催化剂23向捕集器24流入的气体的温度变高。并且,接受高温的气体的热而捕集器24的温度也升高。当捕集器24的温度上升为颗粒物的着火点以上时,堆积于捕集器24的颗粒物燃烧而被净化。
当在时刻t3清除了燃料切断执行标志时,燃料导入处理的实施标志也同时被清除。在时刻t3以后,再次开始内燃机10的燃烧运转。在燃烧运转再次开始时,燃料喷射阀18的燃料喷射量被控制成适合于燃烧运转的量。另外,被设定为非燃烧点火正时AOPinj的点火正时被变更为混合气燃烧的点火正时AOPb(例如压缩上止点附近的正时)。
如以上说明这样,在燃料导入处理的执行中,火花塞20的火花放电在非燃烧点火正时AOPinj实施,因此从燃料喷射阀18喷射出的燃料没有在汽缸12中燃烧而向排气通路21导入。另外,在燃料导入处理的执行中,通过火花放电的实施而火花塞20的电极温度被维持为高的状态。因而,即使在燃料导入处理的执行中也能够使附着于电极的碳燃烧。由此,在燃料导入处理的执行中难以产生火花塞20的闷烧。因此,在燃料导入处理结束后再次开始汽缸12内的混合气的燃烧时混合气容易点火。
本实施方式也可以如以下这样变更。本实施方式及以下的变更例能够在技术上不矛盾的范围内互相组合而实施。
作为非燃烧点火正时AOPinj,虽然设定了压缩上止点后180°(排气下止点)的正时,但只要是缸内压比点火要求压α低的期间内的正时即可,也可以设定其他正时。
虽然以堆积于捕集器24的颗粒物的燃烧净化为目的而实施了燃料导入处理,但也可以以其以外的目的来为了将三元催化剂23升温而进行燃料导入处理。例如,在催化剂温度下降而三元催化剂23的排气净化能力下降时,也可以为了恢复排气净化能力而进行燃料导入处理。
虽然在车辆的惯性行驶中进行了燃料导入处理,但只要是能够在停止了内燃机10的燃烧的状态下维持曲轴14的旋转的状况即可,也可以在车辆的惯性行驶中以外的状况下实施燃料导入处理。
另外,在除了内燃机之外还搭载有马达作为驱动源的混合动力车辆中,存在能够在停止了内燃机的燃烧运转的状态下利用马达的动力来使曲轴旋转的混合动力车辆。在这样的混合动力车辆中,也可以一边利用马达的动力使曲轴旋转一边实施燃料导入处理。
虽然通过燃料喷射阀18向进气通路15内的燃料喷射而实施了燃料导入处理,但也可以通过向汽缸12内的燃料喷射来进行燃料导入处理。也就是说,本发明也可以应用于具备向汽缸12内喷射燃料的缸内喷射式的燃料喷射阀的内燃机。
Claims (3)
1.一种内燃机的控制装置,其中,
所述内燃机具备:
燃料喷射阀;
汽缸,被导入包含所述燃料喷射阀喷射出的燃料的混合气;
火花塞,通过火花放电来对导入到所述汽缸的混合气进行点火;
排气通路,供从所述汽缸内排出来的气体流动;及
三元催化剂,设置于所述排气通路,
所述控制装置构成为,
在所述内燃机的曲轴正在旋转的状态下,执行使包含所述燃料喷射阀喷射出的燃料的混合气不在所述汽缸中燃烧而向所述排气通路导入的燃料导入处理,
在所述燃料导入处理的执行中,执行在非燃烧点火正时实施所述火花塞的火花放电的放电处理,
所述非燃烧点火正时是即使实施所述火花塞的火花放电在所述汽缸中混合气也不会燃烧的期间内的正时。
2.根据权利要求1所述的内燃机的控制装置,
所述非燃烧点火正时是所述汽缸的缸内压比混合气的点火所需的最低压低的期间内的正时,
所述最低压是在所述缸内压比该最低压低时,即使实施所述火花塞的火花放电,在所述汽缸内混合气也不会燃烧的压力。
3.一种内燃机的控制方法,其中,
所述内燃机具备:
燃料喷射阀;
汽缸,被导入包含所述燃料喷射阀喷射出的燃料的混合气;
火花塞,通过火花放电来对导入到所述汽缸的混合气进行点火;
排气通路,供从所述汽缸内排出来的气体流动;及
三元催化剂,设置于所述排气通路,
所述控制方法包括如下步骤:
在所述内燃机的曲轴正在旋转的状态下,执行使包含所述燃料喷射阀喷射出的燃料的混合气不在所述汽缸中燃烧而向所述排气通路导入的燃料导入处理;及
在所述燃料导入处理的执行中,执行在非燃烧点火正时实施所述火花塞的火花放电的放电处理,
所述非燃烧点火正时是即使实施所述火花塞的火花放电在所述汽缸中混合气也不会燃烧的期间内的正时。
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US10801379B2 (en) | 2020-10-13 |
JP2020023913A (ja) | 2020-02-13 |
US20200049121A1 (en) | 2020-02-13 |
DE102019120771B4 (de) | 2021-02-11 |
JP7124536B2 (ja) | 2022-08-24 |
CN110821688A (zh) | 2020-02-21 |
DE102019120771A1 (de) | 2020-02-13 |
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