Engine
An engine that suppresses damage on a support mechanism of a diesel particulate filter (DPF) due to vibration in the pitch direction, in which the DPF, which purifies exhaust gas from an exhaust manifold, is disposed in an orientation orthogonal or approximately orthogonal to a rotational axis of a crankshaft in a plan view. A support mechanism is provided, which enables a cylinder head, an intake manifold, and an intake collector to support the DPF. The support mechanism includes a first support position in which the cylinder head supports the DPF, a second support position in which the intake manifold supports the DPF, and a third support position in which the intake collector supports the DPF. The third support position deviates from the first support position and the second support position in a direction of the rotational axis of the crankshaft.
1. An engine comprising:
a cylinder head;
a diesel particulate filter (DPF) configured to purify exhaust gas from an exhaust manifold, the DPF being disposed above the cylinder head in an orientation orthogonal or approximately orthogonal to a rotational axis of a crankshaft in a plan view;
an intake manifold; and
an intake collector configured to return part of the exhaust gas to the intake manifold as exhaust gas recirculation (EGR) gas, the intake collector being fixed to the intake manifold, wherein:
a support mechanism configured to enable the cylinder head, the intake manifold, and the intake collector to support the DPF is provided;
the support mechanism includes a first support position in which the cylinder head supports the DPF, a second support position in which the intake manifold supports the DPF, and a third support position in which the intake collector supports the DPF; and
the third support position deviates from the first support position and the second support position in a direction of the rotational axis of the crankshaft.
2. The engine according to claim 1 , wherein
the support mechanism is made up of a first support unit for enabling the cylinder head and the intake manifold to support the DPF, and a second support unit for enabling the intake collector to support the DPF.
3. The engine according to claim 2 , wherein:
the first support unit includes a first bracket for enabling the cylinder head and the intake manifold to support a portion of the DPF positioned toward the intake manifold; and
the second support unit is constituted by a second bracket provided on and between the first bracket and the intake collector.
4. The engine according to claim 2 , wherein:
the second support unit includes an abutting portion that is abuttable from above on an attachment portion provided on an upper surface of the intake collector; and
the abutting portion is fastened to the attachment portion of the intake collector with a bolt oriented in an up-down direction.
5. The engine according to claim 1 , wherein
the DPF is disposed above the cylinder head and toward an end portion positioned away from an output shaft portion for a driven apparatus.