A fuel reforming system includes a fuel injection device capable of injecting fuel into an EGR passage, a reforming catalyst provided in the EGR passage, an oxidation catalyst provided in the vicinity of the reforming catalyst in the EGR, and an air supply device that supplies air to the EGR passage. When clogging occurs in the reforming catalyst and a temperature of the reforming catalyst is less than a first temperature, air is supplied to the EGR passage by the air supply device, and fuel is injected by the fuel injection device. When clogging occurs in the reforming catalyst and the temperature of the reforming catalyst is greater than or equal to the first temperature, air is supplied to the EGR passage by the air supply device, and fuel injection of the fuel injection device is stopped.

A fuel reforming system includes a fuel injection device capable of injecting fuel into an EGR passage, a reforming catalyst provided in the EGR passage, an oxidation catalyst provided in the vicinity of the reforming catalyst in the EGR, and an air supply device that supplies air to the EGR passage. When clogging occurs in the reforming catalyst and a temperature of the reforming catalyst is less than a first temperature, air is supplied to the EGR passage by the air supply device, and fuel is injected by the fuel injection device. When clogging occurs in the reforming catalyst and the temperature of the reforming catalyst is greater than or equal to the first temperature, air is supplied to the EGR passage by the air supply device, and fuel injection of the fuel injection device is stopped.

Systems and methods for treated exhaust gas recirculation (EGR) for an internal combustion engine are disclosed. The internal combustion engine has an exhaust manifold discharging exhaust gas and an intake manifold receiving forced air from a compressor. One or more exhaust treatment devices treat the exhaust gas and produce a treated exhaust gas. The EGR system includes an EGR line downstream of the one or more exhaust treatment devices and connected to the engine intake line downstream of the compressor, wherein the treated EGR line recirculates the treated exhaust gas to the intake manifold of the engine without passing through the compressor.

Systems and methods for treated exhaust gas recirculation (EGR) for an internal combustion engine are disclosed. The internal combustion engine has an exhaust manifold discharging exhaust gas and an intake manifold receiving forced air from a compressor. One or more exhaust treatment devices treat the exhaust gas and produce a treated exhaust gas. The EGR system includes an EGR line downstream of the one or more exhaust treatment devices and connected to the engine intake line downstream of the compressor, wherein the treated EGR line recirculates the treated exhaust gas to the intake manifold of the engine without passing through the compressor.

This air intake apparatus includes an air intake apparatus body including an intake air passage and an external gas passage portion provided as a structure separate from the air intake apparatus body inside the air intake apparatus body, the external gas passage portion through which external gas can be introduced into the intake air passage.

An ejector used in an EGR system is disposed at a position at which at least part of an outer-diameter-gradually-varying portion of a nozzle can be viewed through an introduction hole from the outside of the housing. Consequently, EGR gas introduced into the housing through the introduction hole is introduced into a decompression chamber without colliding with an outer wall of an outer-diameter equivalent portion of the nozzle. The outer-diameter-gradually-varying portion of the nozzle guides the EGR gas from the introduction hole, so that the EGR gas can be efficiently mixed with an air flow of compressed air supplied from an air compressor.

An ejector used in an EGR system is disposed at a position at which at least part of an outer-diameter-gradually-varying portion of a nozzle can be viewed through an introduction hole from the outside of the housing. Consequently, EGR gas introduced into the housing through the introduction hole is introduced into a decompression chamber without colliding with an outer wall of an outer-diameter equivalent portion of the nozzle. The outer-diameter-gradually-varying portion of the nozzle guides the EGR gas from the introduction hole, so that the EGR gas can be efficiently mixed with an air flow of compressed air supplied from an air compressor.

An internal combustion engine includes, in addition to an LPL-EGR system, two water vapor separation film modules for fresh air and for EGR gas. A module for fresh air is provided in an intake passage between a connecting portion with an EGR passage, and an air cleaner. A module for EGR gas is provided in the EGR passage on an upstream side of an EGR cooler. The module is connected to a pressure reducing pump through a suction passage. The module is connected to a pressure reducing pump through a suction passage.

An internal combustion engine includes, in addition to an LPL-EGR system, two water vapor separation film modules for fresh air and for EGR gas. A module for fresh air is provided in an intake passage between a connecting portion with an EGR passage, and an air cleaner. A module for EGR gas is provided in the EGR passage on an upstream side of an EGR cooler. The module is connected to a pressure reducing pump through a suction passage. The module is connected to a pressure reducing pump through a suction passage.

An EGR device includes a plurality of EGR inlet pipes connected to each of the plurality of intake branch passages, an exhaust gas inlet passage conveying a portion of the exhaust gas as EGR gas, an upstream-side branch passage in communication with the exhaust gas inlet passage and branching the EGR gas, and a downstream-side branch passage distributing the EGR gas branched in the upstream-side branch passage to the plurality of EGR inlet pipes. The downstream-side branch passage extends in a direction parallel to an arrangement direction of the plurality of cylinders. At least one of the exhaust gas inlet passage and the upstream-side branch passage is configured to suppress flow to a downstream side of condensed water located upstream of the downstream-side branch passage when acceleration in a direction parallel to the arrangement direction is applied to the internal combustion engine.