公开(公告)号：US20140251287A1

公开(公告)日：2014-09-11

申请号：US14196232

申请日：2014-03-04

Applicant: DENSO CORPORATION

Inventor： Hiroyuki TAKEZOE

IPC: F02D41/00

CPC classification number: F02D41/0052 ,  F02D41/0007 ,  F02D41/0072 ,  F02D41/18 ,  F02D2041/0075 ,  F02D2200/0402 ,  F02D2200/0406 ,  F02M26/06 ,  F02M26/15 ,  F02M26/23 ,  Y02T10/47

Abstract: While an EGR valve is closed, a total gas flow rate is computed based on an intake air pressure. An error of the total gas flow rate is learned and corrected. When the EGR valve is opened, the total gas flow rate is computed based on the intake air pressure. An actual EGR-gas flow rate is computed based on the total gas flow rate and a fresh-air flow rate. By using of the EGR valve model, an estimated EGR-gas flow rate is computed based on the fresh-air flow rate and an opening degree of the EGR valve. An error of the estimated EGR-gas flow rate is learned and corrected based on the actual EGR-gas flow rate and the estimated EGR-gas flow rate. Based on a volume fraction of the corrected estimated EGR-gas flow rate and the fresh-air flow rate, an EGR ratio is computed.

Abstract translation: 当EGR阀关闭时，基于进气压力来计算总气体流量。 了解和校正总气体流量的误差。 当EGR阀打开时，基于进气压力计算总气体流量。 基于总气体流量和新鲜空气流量计算实际的EGR气体流量。 通过使用EGR阀模型，基于新鲜空气流量和EGR阀的开度计算出EGR气体的流量。 基于实际的EGR气体流量和估计的EGR气体流量来学习和校正估计的EGR气体流量的误差。 基于校正的估计EGR气体流量和新鲜空气流量的体积分数，计算EGR率。

公开(公告)号：US20170082075A1

公开(公告)日：2017-03-23

申请号：US15312064

申请日：2015-05-25

Applicant: DENSO CORPORATION

Inventor： Hiroyuki TAKEZOE

IPC: F02M35/10

CPC classification number: F02M35/10386 ,  F02D41/003 ,  F02D41/0047 ,  F02D41/18 ,  F02D41/2464 ,  F02D41/2474 ,  F02D41/248 ,  F02D2041/001 ,  F02D2200/0402 ,  F02D2200/0406 ,  F02M35/10373 ,  F02M35/1038 ,  Y02T10/47

Abstract: An ECU calculates a cylinder flowing air amount based on an intake tube pressure, using an air intake valve model simulating a behavior of air flowing into a combustion chamber via an air intake valve. The ECU calculates an air intake amount based on a detection result of an air amount detection sensor, and determines whether the air intake amount matches an actual amount of air flowing into the combustion chamber. When the air intake amount is determined to match the actual amount, the ECU calculates a learnt value based on comparison of the cylinder flowing air amount with the air intake amount.

公开(公告)号：US20140311450A1

公开(公告)日：2014-10-23

申请号：US14255432

申请日：2014-04-17

Applicant: DENSO CORPORATION

Inventor： Keitarou MINAMI ,  Hideaki ICHIHARA ,  Hiroyuki TAKEZOE ,  Hiroshi KATSURAHARA

IPC: F02P5/04 ,  F02D41/00

CPC classification number: F02P5/045 ,  F02D41/0072 ,  F02D2041/1412 ,  F02D2041/1431 ,  F02D2200/0402 ,  F02D2200/1015 ,  F02D2250/24 ,  F02P5/1516 ,  Y02T10/46 ,  Y02T10/47

Abstract: A cylinder-inflow EGR gas amount is estimated, a misfire limit EGR gas amount is calculated on the basis of an engine operation state, and the misfire limit EGR gas amount is compared with the cylinder-inflow EGR gas amount to predict whether a misfire occurs. When the misfire is predicted, a misfire avoidance control is executed. Further, an actual misfire countermeasure effect amount in a case of the execution of the misfire avoidance control is calculated, and the actual misfire countermeasure effect amount is compared with a required misfire countermeasure effect amount to determine whether the misfire is avoidable when the misfire avoidance control is executed. If the misfire is unavoidable even if the misfire avoidance control is executed, a delay restriction value of an ignition timing to avoid the misfire is calculated, and the amount of a delay in the ignition timing is restricted using the delay restriction value.

Abstract translation: 气缸流入EGR气体量被估计，基于发动机运转状态计算失火极限EGR气体量，并将失火极限EGR气体量与气缸流入EGR气体量进行比较，以预测是否发生失火 。 当预测失火时，执行失火回避控制。 此外，计算在执行失火回避控制的情况下的实际失火对策效果量，并将实际失火对策效果量与所需的失火对策效果量进行比较，以确定当失火回避控制 被执行。 即使执行失火回避控制，如果失火是不可避免的，则计算出避免失火的点火正时的延迟限制值，并且使用延迟限制值来限制点火正时的延迟量。