Abstract: Provided are an aftertreatment device capable of purifying exhaust gas with a compact configuration and an engine including the aftertreatment device. An aftertreatment device includes: a first case that is a DPF case; a second case that is an SCR case; an exhaust connection pipe that connects the first case and the second case; a mixer arranged at an upstream end of the exhaust connection pipe in a flow direction of exhaust gas; and a urea water injection portion that injects urea water into the mixer.

Abstract: An engine is equipped with an engine body, a turbocharger, an exhaust gas purifier, an exhaust communication pipe. The turbocharger is connected to the engine body. The exhaust gas purifier purifies exhaust gas discharged from the turbocharger. The exhaust communication pipe connects the turbocharger with the exhaust gas purifier. The exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the exhaust gas purifier. A downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape. An upstream end portion of the first connection member has an inner peripheral face having a cross-section of an abnormal-shape that is different from the inner peripheral face of the downstream end portion.

Abstract: Provided are an aftertreatment device capable of purifying exhaust gas with a compact configuration and an engine including the aftertreatment device. An aftertreatment device includes: a DPF case; an SCR case; an exhaust connection pipe that connects the DPF case and the SCR case; a mixer arranged at an upstream end of the exhaust connection pipe in a flow direction of exhaust gas; and a urea water injection portion that injects urea water into the mixer.

Abstract: An engine is equipped with an engine body, a turbocharger, an exhaust gas purifier, an exhaust communication pipe. The turbocharger is connected to the engine body. The exhaust gas purifier purifies exhaust gas discharged from the turbocharger. The exhaust communication pipe connects the turbocharger with the exhaust gas purifier. The exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the exhaust gas purifier. A downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape. An upstream end portion of the first connection member has an inner peripheral face having a cross-section of an abnormal-shape that is different from the inner peripheral face of the downstream end portion.

Abstract: An engine is equipped with an engine body, a turbocharger, an exhaust gas purifier, an exhaust communication pipe. The turbocharger is connected to the engine body. The exhaust gas purifier purifies exhaust gas discharged from the turbocharger. The exhaust communication pipe connects the turbocharger with the exhaust gas purifier. The exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the exhaust gas purifier. A downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape. An upstream end portion of the first connection member has an inner peripheral face having a cross-section of an abnormal-shape that is different from the inner peripheral face of the downstream end portion.

Abstract: Provided are an aftertreatment device capable of purifying exhaust gas with a compact configuration and an engine including the aftertreatment device. An aftertreatment device includes: a DPF case; an SCR case; an exhaust connection pipe that connects the DPF case and the SCR case; a mixer arranged at an upstream end of the exhaust connection pipe in a flow direction of exhaust gas; and a urea water injection portion that injects urea water into the mixer.

Abstract: An engine is equipped with an engine body, a turbocharger, an exhaust gas purifier, an exhaust communication pipe. The turbocharger is connected to the engine body. The exhaust gas purifier purifies exhaust gas discharged from the turbocharger. The exhaust communication pipe connects the turbocharger with the exhaust gas purifier. The exhaust communication pipe includes: a first connection member that is connected to the turbocharger, and a second connection member that connects the first connection member with the exhaust gas purifier. A downstream end portion of the first connection member has an inner peripheral face having a cross-section of a circular shape. An upstream end portion of the first connection member has an inner peripheral face having a cross-section of an abnormal-shape that is different from the inner peripheral face of the downstream end portion.