Abstract: An exhaust device includes a first exhaust pipe, a second exhaust pipe, and a third exhaust pipe. The first exhaust pipe is comprised of a pipe member. The second exhaust pipe and the third exhaust pipe are comprised of a tubular member including a merging tubular portion and a downstream tubular portion. In the merging tubular portion, exhaust gas to be discharged from an exhaust port of the second cylinder and exhaust gas to be discharged from an exhaust port of the third cylinder are merged. The merging tubular portion is comprised of combining a plurality of plate members, at least a part of which is formed by press working. A distal end of the first exhaust pipe is disposed inside the downstream tubular portion. The downstream tubular portion is offset on the side of the first cylinder with respect to a center in a cylinder array direction.

Abstract: A motor vehicle (100) on which a vehicle engine (1) is mounted is described, the vehicle engine (1) including: an exhaust purification system (70) housing a GPF device (73) for purifying exhaust gas; and an EGR passage (52) connected to a portion of the exhaust purification system located downstream of the GPF device, and the engine is mounted in an engine compartment (R) defined in a front portion of a vehicle body. The exhaust purification system is located forward of a dash panel (103) constituting the engine compartment, and is positioned to extend toward a tunnel portion (T) of the dash panel. An upstream end portion (52c) of the EGR passage is connected to a lower portion of the exhaust purification system in a vertical direction of the vehicle.

Abstract: A vehicle engine 2 comprises an exhaust system having an exhaust manifold 12 and an exhaust purification device 18. The exhaust manifold 12 is disposed at a predetermined distance from a dash panel 106 constituting a body of the vehicle 100, the exhaust purification device 18 is disposed in a position overlapping a floor tunnel region 114, formed by a floor tunnel of the body, and is disposed below the exhaust manifold 12 and to one side of the center of the engine 2 in the cylinder-array direction, as viewed from the longitudinal direction of the vehicle 100. An exhaust purification device introduction passage 17 connecting the exhaust manifold 12 and the exhaust purification device 18 is disposed on the other side of the center of the exhaust manifold 12 in the cylinder-array direction, and extends below the exhaust manifold 12 to be connected to the exhaust purification device 18.

Abstract: An engine (1) includes: an exhaust purification system (70) housing a GPF device (73) for purifying exhaust gas; and an EGR passage (52) connected to a portion of the exhaust purification system located downstream of the GPF device, and the engine is mounted in an engine compartment (R) defined in a front portion of a vehicle body. The exhaust purification system is located forward of a dash panel (103) constituting the engine compartment, and is positioned to extend toward a tunnel portion (T) of the dash panel. An upstream end portion (52c) of the EGR passage is connected to a lower portion of the exhaust purification system in a vertical direction of the vehicle.

Abstract: An engine exhaust device includes: a first catalyst; a second catalyst; and a tubular connecting member. The connecting member includes: a first opening; a second opening; and a bend connecting. A downstream end surface of the first catalyst is connected to the first opening, and an upstream end surface of the second catalyst is connected to the second opening. The downstream end surface and the upstream end surface form a dihedral angle within a range from 60 to 120 degrees. A part of the upstream end surface of the second catalyst includes an overlap that is close and opposed to a part of a surface of the first catalyst. The bend of the connecting member includes: a first wall; a second wall; and a connector. The first wall has a curve. The curvature radius of the first wall is greater than the predetermined curvature radius.

Abstract: An exhaust device includes a first exhaust pipe, a second exhaust pipe, and a third exhaust pipe. The first exhaust pipe is comprised of a pipe member. The second exhaust pipe and the third exhaust pipe are comprised of a tubular member including a merging tubular portion and a downstream tubular portion. In the merging tubular portion, exhaust gas to be discharged from an exhaust port of the second cylinder and exhaust gas to be discharged from an exhaust port of the third cylinder are merged. The merging tubular portion is comprised of combining a plurality of plate members, at least a part of which is formed by press working. A distal end of the first exhaust pipe is disposed inside the downstream tubular portion. The downstream tubular portion is offset on the side of the first cylinder with respect to a center in a cylinder array direction.

Abstract: An engine exhaust device includes: a first catalyst; a second catalyst; and a connecting member shaped into a tube and forming a part of the exhaust path, and connecting the first catalyst to the second catalyst. A downstream end surface of the first catalyst and an upstream end surface of the second catalyst form a dihedral angle within a range from 60 degrees to 120 degrees. A part of the upstream end surface of the second catalyst is close to and faces a part of a side surface of the first catalyst. On a cross-section including a central axis of the first catalyst and being parallel to a central axis of a second catalyst, a length of the part of the side surface of the first catalyst is longer than or equal to 10% and shorter than 50% of an entire length of the first catalyst.

Abstract: A downstream-side heat insulating material which is provided at a side face of a GPF which is positioned on a downstream side, in an exhaust-gas flowing direction, of plural in-line arranged catalysts has a first opening portion and a second opening portion which are provided for attaching supporting members.

Abstract: An intake and exhaust device (1) for a vehicle engine is capable to perform a compression self-ignition operation, the device comprising on an intake passage a supercharger (9) driven by a force other than an exhaust gas, wherein an exhaust purification device (18) disposed on an exhaust passage is disposed adjacent to an outer surface of the engine (2).

Abstract: Provided is a powertrain for a vehicle in which an exhaust purifier is utilized as a dynamic damper. The powertrain includes an engine, and a transmission linked to the engine. The engine has an exhaust purification system containing a GPF device for purifying an exhaust gas. The exhaust purification system is disposed along a rear external surface of a cylinder head. The exhaust purification system is supported via a first support on the engine. A vertical side portion of the exhaust purification system is located downstream of the first support in a flow direction of an exhaust gas, extending in a direction away from the external surface.

Abstract: An exhaust-gas discharge port to discharge a main flow of exhaust gas passing through an exhaust-gas purifying device is provided at a position which is offset, on one side, from a center axis of the purifying-device body, and an EGR-gas takeout port is provided at a position which is offset, on an opposite side to the exhaust-gas discharge port, from the center axis of the purifying-device body.

Abstract: A downstream-side exhaust-gas takeout portion of a pressure-difference detector is provided between an exhaust-gas discharge port of a downstream-side cover and an EGR-gas takeout port so that a stable exhaust-gas pressure can be taken out (detected).

Abstract: An engine exhaust device includes: a first catalyst; a second catalyst; a connection member and an exhaust gas outlet pipe. The first catalyst has a downstream end face and the second catalyst has an upstream end face. The downstream end face and the upstream end face form a predetermined dihedral angle. The upstream end face of the second catalyst and a side surface of the first catalyst closely face each other to form an overlap. A center axis of the exhaust gas outlet pipe is offset further toward the first catalyst than a center axis of the second catalyst is.

Abstract: A vehicle engine 2 comprises an exhaust system having an exhaust manifold 12 and an exhaust purification device 18. The exhaust manifold 12 is disposed at a predetermined distance from a dash panel 106 constituting a body of the vehicle 100, the exhaust purification device 18 is disposed in a position overlapping a floor tunnel region 114, formed by a floor tunnel of the body, and is disposed below the exhaust manifold 12 and to one side of the center of the engine 2 in the cylinder-array direction, as viewed from the longitudinal direction of the vehicle 100. An exhaust purification device introduction passage 17 connecting the exhaust manifold 12 and the exhaust purification device 18 is disposed on the other side of the center of the exhaust manifold 12 in the cylinder-array direction, and extends below the exhaust manifold 12 to be connected to the exhaust purification device 18.

Abstract: An engine exhaust device includes: a first catalyst; a second catalyst; and a tubular connecting member. The connecting member includes: a first opening; a second opening; and a bend connecting. A downstream end surface of the first catalyst is connected to the first opening, and an upstream end surface of the second catalyst is connected to the second opening. The downstream end surface and the upstream end surface form a dihedral angle within a range from 60 to 120 degrees. A part of the upstream end surface of the second catalyst includes an overlap that is close and opposed to a part of a surface of the first catalyst. The bend of the connecting member includes: a first wall; a second wall; and a connector. The first wall has a curve. The curvature radius of the first wall is greater than the predetermined curvature radius.

Abstract: An engine exhaust device includes: a first catalyst; a second catalyst; and a connecting member shaped into a tube and forming a part of the exhaust path, and connecting the first catalyst to the second catalyst. A downstream end surface of the first catalyst and an upstream end surface of the second catalyst form a dihedral angle within a range from 60 degrees to 120 degrees. A part of the upstream end surface of the second catalyst is close to and faces a part of a side surface of the first catalyst. On a cross-section including a central axis of the first catalyst and being parallel to a central axis of a second catalyst, a length of the part of the side surface of the first catalyst is longer than or equal to 10% and shorter than 50% of an entire length of the first catalyst.

Abstract: An arc-shaped recess part is provided at a collective pipe of an exhaust manifold, whereby a flow of exhaust gas from one end side of cylinders is uniformized and then introduced into an exhaust-gas purifying device.

Abstract: Disclosed herein is an exhaust insulator structure for a multi-cylinder engine of a vehicle. The structure includes an exhaust manifold, an exhaust gas purifier, and a heat insulator. The engine is able to switch its mode of operation from an all-cylinder operation in which all of four cylinders thereof are activated to a cylinder-cutoff operation in which two of the four cylinders are deactivated to serve as idle cylinders and the other two cylinders are activated to serve as active cylinders, or vice versa. The exhaust manifold includes: idle-cylinder-connected branched exhaust piping communicating with the idle cylinders; and active-cylinder-connected branched exhaust piping communicating with the active cylinders. A portion of the heat insulator facing the active-cylinder-connected branched exhaust piping has an opening that lets air blowing against the vehicle traveling into the heat insulator.

Abstract: A multi-cylinder engine exhaust structure disclosed herein includes: four branched exhaust pipes respectively communicating with four cylinders classified into two groups, each being comprised of two of the four cylinders with discontinuous exhaust strokes; two intermediate collecting pipes, each being formed by combining associated two of the four branched exhaust pipes respectively communicating with the two cylinders in an associated one of the two groups; a last collecting pipe formed by combining these intermediate collecting pipes; and an exhaust gas purifier coupled to an exhaust gas downstream end of the last collecting pipe.

Abstract: Provided is a powertrain for a vehicle in which an exhaust purifier is utilized as a dynamic damper. The powertrain includes an engine, and a transmission linked to the engine. The engine has an exhaust purification system containing a GPF device for purifying an exhaust gas. The exhaust purification system is disposed along a rear external surface of a cylinder head. The exhaust purification system is supported via a first support on the engine. A vertical side portion of the exhaust purification system is located downstream of the first support in a flow direction of an exhaust gas, extending in a direction away from the external surface.