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公开(公告)号：US20230056691A1
公开(公告)日：2023-02-23
申请号：US17794309
申请日：2020-01-23
IPC分类号： B60K11/04
摘要： A vehicle cooling device includes a first heat exchanger and a second heat exchanger. The first heat exchanger is a water-cooled intercooler that is configured to cool supercharged intake air. The second heat exchanger is a water-cooled EGR gas cooler that is configured to cool EGR gas. The first heat exchanger and the second heat exchanger are arranged in series on a cooling water circuit such that cooling water flowing out of the first heat exchanger flows into the second heat exchanger. The second heat exchanger is arranged in a position relatively lower than a height position of the first heat exchanger when the cooling device has been installed in a vehicle. Due to this height difference, the cooling water in the second heat exchanger has high pressure, and boiling of the cooling water is suppressed.
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公开(公告)号：US20220268222A1
公开(公告)日：2022-08-25
申请号：US17639470
申请日：2019-09-06
摘要： An EGR valve is provided in an EGR passage circulating a part of an exhaust gas of an exhaust pipe in an intake pipe as an EGR gas, the EGR valve adjusting an EGR gas amount flowing in the EGR passage when an engine is in an EGR region, a differential pressure device is provided in the intake pipe, the differential pressure device adjusting a differential pressure of the EGR valve, a control unit is provided to control the EGR valve and the differential pressure device, and the EGR control method includes switching whether to adjust the EGR gas amount using the EGR valve and the differential pressure device or to adjust the EGR gas amount using the EGR valve only on the basis of an exhaust gas pressure of an inlet portion of the EGR passage.
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公开(公告)号：US20210054794A1
公开(公告)日：2021-02-25
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：US20190331035A1
公开(公告)日：2019-10-31
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：US20190234328A1
公开(公告)日：2019-08-01
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：US20240183322A1
公开(公告)日：2024-06-06
申请号：US18553218
申请日：2021-04-15
CPC分类号： F02D41/0007 , F02D35/027
摘要： A control method and a control device for controlling a spark-ignition internal combustion engine that is equipped with a turbocharger and an exhaust gas recirculation device. The operation of the engine is carried out to perform a stoichiometric air-fuel ratio by performing exhaust gas recirculation even in a high-load range including a maximum-output operation point. When the maximum output operation point is required, intake air information such as atmospheric pressure and outside air temperature is used as a basis to calculate intake air density, which is compared with a predetermined density threshold. When the intake density is equal to or less than the density threshold at a high-altitude location or the like, an exhaust gas recirculation rate is set to 0. As a result, the maximum output can be higher than when exhaust gas recirculation is performed.
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7.发明申请公开(公告)号：US20190353109A1
公开(公告)日：2019-11-21
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：US20220274060A1
公开(公告)日：2022-09-01
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：US20170082044A1
公开(公告)日：2017-03-23
申请号：US15312021
申请日：2014-05-21
CPC分类号： F02D41/0052 , F02D21/08 , F02D41/0072 , F02D45/00 , F02D2041/0067 , F02D2041/0075 , F02M26/00 , F02M26/47 , F02M26/52
摘要： An EGR control device includes an estimate EGR ratio calculating portion adapted to calculate an estimate EGR ratio from a fresh air flow amount at a joining portion with the EGR passage of an intake passage and an EGR gas amount passing through the EGR valve, and a joining portion EGR ratio estimating portion adapted to correct an estimate EGR ratio on the basis of a gaseous state inside the introduction passage when the EGR valve switches from a closed state to an open state, to calculate a joining portion EGR ratio being a proportion of an EGR gas amount with respect to fresh air in the joining portion.
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10.发明申请EXHAUST GAS RECIRCULATION CONTROL DEVICE AND EXHAUST GAS RECIRCULATION CONTROL METHOD 审中-公开排气回送控制装置和排气回送控制方法公开(公告)号：US20170045008A1
公开(公告)日：2017-02-16
申请号：US15305518
申请日：2014-04-25
CPC分类号： F02D41/0052 , F02D41/0007 , F02D41/08 , F02D41/16 , F02D2041/0017 , F02M26/00 , F02M26/05 , F02M26/06 , F02M26/64 , Y02T10/121 , Y02T10/144
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.
摘要翻译： 废气再循环控制装置控制废气再循环装置，废气再循环装置包括废气再循环通道，其适于使内燃机的排气的一部分沿着排气流从涡轮增压器的涡轮下游的排气通道循环到 进气通道沿着进气流在涡轮增压器的压缩机上游，并且沿着进气流在空气流量计的下游;以及再循环控制阀，其适于调节循环到进气通道的排气量。 此外，排气再循环控制装置包括再循环比设定装置，其适于对内燃机的较小进气量设定较低的目标再循环比。
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