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公开(公告)号：US11441497B2
公开(公告)日：2022-09-13
申请号：US16963571
申请日：2018-01-23
发明人： Kengo Yonekura , Hirofumi Tsuchida
摘要： During a transient period, the opening degree of a throttle valve (throttle opening degree) is varied from a steady-period target throttle opening degree in a region A1 toward a valve closing side by a predetermined amount ΔP, and is thereafter controlled so as to become a steady-period target throttle opening degree in the region A1. The transient period is a transient period in which the operation state is shifted from a region B2 in which an air-fuel ratio in a supercharged state becomes a predetermined lean air-fuel ratio to a region A1 in which the air-fuel ratio in a non-supercharged state becomes a predetermined rich air-fuel ratio richer than the lean air-fuel ratio. In this transient period, by reducing the air amount in a cylinder, the combustion torque of an internal combustion engine is suppressed, and consequently; a torque overshoot can be suppressed.
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公开(公告)号：US10883429B2
公开(公告)日：2021-01-05
申请号：US16476952
申请日：2017-02-01
摘要： An intake control method for an internal combustion engine equipped with a low-pressure EGR system includes setting a target intake pressure, which is a target value of an intake pressure in an intake passage between a negative pressure generating valve and an intake throttle valve, necessary for performing EGR control in a state of an exhaust pressure determined for each operating point, setting a target total opening area, which is a sum of a target opening area of an EGR valve and a target opening area of the negative pressure generating valve, on the basis of the target intake pressure, a target fresh air amount, and a target EGR gas amount, setting a target EGR valve opening area, which is an opening area of the EGR valve for achieving the target EGR gas amount, assuming that the negative pressure generating valve is fully open, and setting a value obtained by subtracting the target EGR valve opening area from the target total opening area to be a target negative pressure generating valve opening area, which is a target value of an opening area of the negative pressure generating valve.
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公开(公告)号：US10465622B2
公开(公告)日：2019-11-05
申请号：US16330934
申请日：2016-09-07
摘要： A basic opening (A0) of an EGR control valve (22) is set, based on a current engine operation state. A differential pressure (ΔP1) across the EGR control valve (22) is calculated, based on an actual exhaust system temperature (T1) sensed by an exhaust temperature sensor (33). A reference differential pressure (ΔP0) is calculated, which is a differential pressure across the EGR control valve (22) in a steady state corresponding to the current engine operation state. A reference pulsation amplitude (D) is calculated, which is an amplitude of pulsation of the reference differential pressure (ΔP0). The basic opening (A0) is corrected, based on the differential pressure (ΔP1), the reference differential pressure (ΔP0), and the reference pulsation amplitude (D).
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公开(公告)号：US11623180B2
公开(公告)日：2023-04-11
申请号：US17612769
申请日：2019-05-22
摘要： A catalytic converter is provided with: an inlet-side diffuser part; an outlet-side diffuser part; a case including an upstream-side cylindrical part and a downstream-side cylindrical part; an inner liner provided in the upstream-side cylindrical part; a first catalyst retained inside the inner liner; and a second catalyst retained inside the downstream-side cylindrical part. An end face of the second catalyst faces a peripheral surface of the inner liner. An annular flow path is provided between the upstream-side cylindrical part and the inner liner, and the first catalyst is insulated from heat by the annular flow path. A part of exhaust flows into the second catalyst via the annular flow path.
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公开(公告)号：US20150233326A1
公开(公告)日：2015-08-20
申请号：US14414201
申请日：2013-05-31
IPC分类号： F02M25/07
CPC分类号： F02M26/05 , F02D41/0007 , F02D41/0065 , F02D41/0072 , F02D41/1448 , F02D41/22 , F02D2041/227 , F02D2200/0406 , F02M26/04 , F02M26/06 , F02M26/10 , F02M26/13 , F02M26/16 , Y02T10/144 , Y02T10/47
摘要： An upper-limit threshold value and a lower-limit threshold value of a fore-and-aft differential pressure of an EGR control valve is calculated based on an intake-air quantity detected by an airflow meter. An actual fore-and-aft differential pressure of the EGR control valve is calculated from detected values of an upstream-side pressure sensor and a downstream-side pressure sensor. Then, these threshold values are compared with the actual fore-and-aft differential pressure, and when the actual fore-and-aft differential pressure exceeds the upper-limit threshold value or when the actual fore-and-aft differential pressure is less than the lower-limit threshold value, it is determined that the pressure loss of an intake and exhaust system has changed. If it is determined that the pressure loss of an intake and exhaust system has changed, EGR is inhibited, and if not so, EGR is permitted to be performed. These threshold values are varied depending on a target EGR rate.
摘要翻译： 基于由气流计检测出的进气量计算EGR控制阀的前后压差的上限阈值和下限阈值。 从上游侧压力传感器和下游侧压力传感器的检测值算出EGR控制阀的实际的前后差压。 然后，将这些阈值与实际的前后差压进行比较，并且当实际的前后差压超过上限阈值时，或者当实际的前后差压小于 下限阈值，确定进气排气系统的压力损失已经改变。 如果确定进气和排气系统的压力损失已经改变，则EGR被禁止，如果不是这样，则允许执行EGR。 这些阈值根据目标EGR率而变化。
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公开(公告)号：US10100759B2
公开(公告)日：2018-10-16
申请号：US15305518
申请日：2014-04-25
摘要： An exhaust gas recirculation control device controls an exhaust gas recirculation device that includes an exhaust gas recirculation passage adapted to circulate a portion of exhaust gas of an internal combustion engine from an exhaust passage downstream of a turbine of a turbo supercharger along an exhaust flow to an intake passage upstream of a compressor of the turbo supercharger along an intake flow and downstream of an air flow meter along the intake flow, and a recirculation control valve adapted to adjust an amount of exhaust gas circulated to the intake passage. Furthermore, the exhaust gas recirculation control device includes recirculation ratio setting means adapted to set a lower target recirculation ratio for a smaller intake air amount of the internal combustion engine.
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公开(公告)号：US09964055B2
公开(公告)日：2018-05-08
申请号：US14414980
申请日：2013-06-10
发明人： Mitsuhiro Akagi , Hirofumi Tsuchida , Ayumi Komiya
IPC分类号： F02D41/00 , F02D23/00 , F02D13/02 , F02D21/08 , F01L1/344 , F02M26/06 , F02M26/01 , F02B29/04 , F02B37/16 , F02B37/18 , F02M26/10 , F02M26/15 , F02M26/23
CPC分类号： F02D41/0052 , F01L1/3442 , F02B29/0406 , F02B37/16 , F02B37/18 , F02D13/0215 , F02D13/0261 , F02D21/08 , F02D23/00 , F02D41/0007 , F02D41/006 , F02D41/0062 , F02D41/0072 , F02D2041/001 , F02M26/01 , F02M26/06 , F02M26/10 , F02M26/15 , F02M26/23 , Y02T10/144 , Y02T10/18 , Y02T10/47
摘要： In a case where a driving state is switched from a high load to a low load in a non-turbo charge region and an external EGR is stopped, at a timing T01 at which an EGR control valve (21) is closed, a valve overlap quantity between an intake valve and an exhaust valve is, as a low load transient time provisional value, controlled in a direction such that the valve overlap between the intake and exhaust valves is once contracted. Then, a target value of the valve overlap quantity between the intake and exhaust valves at a timing T21 preceded by a response time Δt of the variably operated valve mechanism (28) from a timing T31 at which the opening angle of the EGR control valve (21) is modified from the low load transient time provisional value to the target value at the time of the low load.
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公开(公告)号：US10890126B2
公开(公告)日：2021-01-12
申请号：US16476946
申请日：2017-01-16
摘要： A control method for an internal combustion engine including: setting a target valve opening degree of the first throttle valve in accordance with a load, sensing a valve opening degree of the second throttle valve, judging whether or not the valve opening degree of the second throttle valve is an opening degree on a closing side relative to a predetermined set valve opening degree, and correcting the valve opening degree of the first throttle valve to the opening degree on the closing side relative to the target valve opening degree when it is judged that the valve opening degree of the second throttle valve is the opening degree on the closing side relative to the predetermined set valve opening degree.
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公开(公告)号：US20150192079A1
公开(公告)日：2015-07-09
申请号：US14414980
申请日：2013-06-10
发明人： Mitsuhiro Akagi , Hirofumi Tsuchida , Ayumi Komiya
CPC分类号： F02D41/0052 , F01L1/3442 , F02B29/0406 , F02B37/16 , F02B37/18 , F02D13/0215 , F02D13/0261 , F02D21/08 , F02D23/00 , F02D41/0007 , F02D41/006 , F02D41/0062 , F02D41/0072 , F02D2041/001 , F02M26/01 , F02M26/06 , F02M26/10 , F02M26/15 , F02M26/23 , Y02T10/144 , Y02T10/18 , Y02T10/47
摘要： In a case where a driving state is switched from a high load to a low load in a non-turbo charge region and an external EGR is stopped, at a timing T01 at which an EGR control valve (21) is closed, a valve overlap quantity between an intake valve and an exhaust valve is, as a low load transient time provisional value, controlled in a direction such that the valve overlap between the intake and exhaust valves is once contracted. Then, a target value of the valve overlap quantity between the intake and exhaust valves at a timing T21 preceded by a response time Δt of the variably operated valve mechanism (28) from a timing T31 at which the opening angle of the EGR control valve (21) is modified from the low load transient time provisional value to the target value at the time of the low load.
摘要翻译： 在非涡轮增压区域的驱动状态从高负载切换到低负荷并且外部EGR停止的情况下，在关闭EGR控制阀（21）的定时T01，阀重叠 作为低负载瞬时时间临时值，进气门和排气门之间的量被控制在使得进气门和排气门之间的阀重叠一度收缩的方向上。 然后，在时刻T21之前的阀门重叠量的目标值，其前面是可变动作的阀机构（28）的响应时间＆Dgr; t，从定时T31开始，其中EGR控制 阀（21）从低负载瞬时时间临时值修改为低负载时的目标值。
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公开(公告)号：US20150184587A1
公开(公告)日：2015-07-02
申请号：US14414750
申请日：2013-06-10
发明人： Ayumi Komiya , Hirofumi Tsuchida , Mitsuhiro Akagi
CPC分类号： F02B47/08 , F02B37/16 , F02B37/18 , F02D21/08 , F02D41/0002 , F02D41/0007 , F02D41/0072 , F02D2200/0402 , F02M26/06 , F02M26/49 , Y02T10/144 , Y02T10/42 , Y02T10/47
摘要： In a case where EGR is started in a supercharging region, an opening degree of a waste gate valve (17) is changed at a timing T1 at which an EGR ratio in a first predetermined position changes by valve open of an EGR control valve (21). In a case where EGR is started in a non-supercharging region, a throttle valve (5) is changed at a timing T2 at which an EGR ratio in a second predetermined position changes by valve open of the EGR control valve (21). With these controls, it is possible to suppress an occurrence of torque step upon start of the EGR without distinction between the supercharging region and the non-supercharging region.
摘要翻译： 在增压区域中开始EGR的情况下，在第一规定位置的EGR率通过EGR控制阀（21）的阀打开而改变的时刻T1，废气闸阀（17）的开度变化 ）。 在非增压区域开始EGR的情况下，节气门（5）在EGR控制阀（21）的阀打开时第二预定位置的EGR率变化的时刻T2变化。 通过这些控制，可以抑制在启动EGR时的转矩阶跃的发生，而不区分增压区域和非增压区域。
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