Engine Device

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.

1 - 6 . (canceled) 
     
     
         7 . An engine device comprising:
 a cylinder head forming air-intake passages for introducing fresh air into air-intake ports and exhaust air passages for guiding exhaust gas from exhaust gas ports,   wherein a cooling water passage is provided on one of left and right side walls and one of front and rear side walls of the cylinder head.   
     
     
         8 . The engine device according to  claim 7 , further comprising:
 an exhaust manifold that communicates with the exhaust air passages; and   an EGR cooler that cools EGR gas that is a part of the exhaust gas from the exhaust manifold,   wherein the EGR cooler is connected to one of front and rear side surfaces of the cylinder head, and an EGR gas passage and the cooling water passage communicating with the EGR cooler are provided at a coupling portion of the cylinder head with the EGR cooler.   
     
     
         9 . The engine device according to  claim 7 , wherein the cylinder head is fastened and fixed above a cylinder block by a plurality of bolts inserted into one of the left and right side walls and the front and rear side walls of an outer peripheral wall of the cylinder head. 
     
     
         10 . The engine device according to  claim 7 , further comprising:
 an air-intake manifold, which aggregates the air-intake passages, formed on one of left and right side portions of the cylinder head,   wherein the cylinder head is provided with a cooling water drainage portion that communicates with the cooling water passage provided on an outer peripheral wall of the cylinder head, at a position adjacent to an end portion of the air-intake manifold on other front and rear side surfaces.   
     
     
         11 . The engine device according to  claim 8 , further comprising:
 a pair of left and right coupling bases for coupling to the EGR cooler are provided on one of the front and rear side surfaces of the cylinder head, and each of the pair of left and right coupling bases is provided with the EGR gas passage and the cooling water passage arranged one above the other.   
     
     
         12 . The engine device according to  claim 11 , wherein one of the coupling bases has the EGR gas passage arranged above the cooling water passage, and the other of the coupling bases has the EGR gas passage arranged below the cooling water passage.