Engine device
AssigneeYanmar Co., Ltd.
InventorTakayuki ONODERA
Life of this patent
Estimating the term…
Abstract
An engine device including a cylinder head provided with a plurality of air-intake passages for taking fresh air into a plurality of air-intake ports and a plurality of exhaust gas passages for emitting exhaust gas from a plurality of exhaust gas ports. An air-intake manifold which aggregates the air-intake passages is formed integrally with one of left and right side portions of the cylinder head. An EGR cooler is coupled to a front surface of the cylinder head; and EGR gas passages and cooling water passages communicating with the EGR cooler are provided in a coupling portion of the cylinder head with the EGR cooler.
Claims6
(canceled)
An engine device comprising:
- a cylinder head provided with a plurality of air-intake passages for taking fresh air into a plurality of air-intake ports and a plurality of exhaust gas passages for emitting exhaust gas from a plurality of exhaust gas ports;
- an exhaust gas manifold communicating with the exhaust gas passages;
- and an EGR cooler configured to cool EGR gas constituting a part of the exhaust gas from the exhaust gas manifold, wherein:
- an air-intake manifold which is configured to aggregate the air-intake passages is formed in one of left and right side portions of the cylinder head;
- the EGR cooler is coupled to one of front and rear surfaces of the cylinder head, and an EGR gas passage and a cooling water passage communicating with the EGR cooler are provided in a coupling portion of the cylinder head with the EGR cooler;
- and
- an outer peripheral wall surrounding an area ranging from a border with the air-intake manifold to a coupling portion with the exhaust gas manifold is provided on the cylinder head in a standing manner;
- and the cooling water passage having an L-shape is provided on one of left and right side walls and one of front and rear side walls of the outer peripheral wall.
An engine device comprising:
- a cylinder head provided with a plurality of air-intake passages for taking fresh air into a plurality of air-intake ports and a plurality of exhaust gas passages for emitting exhaust gas from a plurality of exhaust gas ports;
- an exhaust gas manifold communicating with the exhaust gas passages;
- and an EGR cooler configured to cool EGR gas constituting a part of the exhaust gas from the exhaust gas manifold, wherein:
- an air-intake manifold which is configured to aggregate the air-intake passages is formed in one of left and right side portions of the cylinder head;
- the EGR cooler is coupled to one of front and rear surfaces of the cylinder head, and an EGR gas passage and a cooling water passage communicating with the EGR cooler are provided in a coupling portion of the cylinder head with the EGR cooler;
- and
- a pair of left and right coupling bases for coupling with the EGR cooler are provided on the one of the front and rear surfaces of the cylinder head;
- and each of the coupling bases in the left and right pair has a structure in which the EGR gas passage and the cooling water passage are bored and arranged one above another.
Dependencies are inferred from the claim text.