COOLANT PASSAGE STRUCTURE FOR INTERNAL COMBUSTION ENGINE

摘要

A coolant passage structure for an internal combustion engine includes a coolant communication member. The coolant communication member includes a centrifugal water pump, a housing portion, a scroll portion, a second coolant passage portion, a first coolant passage portion, a direction of a center line of the second coolant passage portion, and a rib. The first coolant passage portion includes a downstream region connected to an upstream region of the second coolant passage portion. A direction of a center line of the first coolant passage portion is parallel to a direction of a rotation shaft of the centrifugal water pump. The direction of the center line of the second coolant passage portion is orthogonal to the direction of the center line of the first coolant passage portion. The rib is disposed on an internal circumferential surface of the first coolant passage portion.

主权项

1. A coolant passage structure for an internal combustion engine, the coolant passage structure enabling coolant to be supplied to a coolant passage in the internal combustion engine, the coolant passage structure comprising:
a coolant communication member accommodating a centrifugal water pump and being attached to the internal combustion engine, wherein the coolant communication member includes a housing portion, a scroll portion, a first coolant passage portion, and a second coolant passage portion, the housing portion accommodates an impeller of the centrifugal water pump, the scroll portion links to the housing portion and includes a downstream region connected to the first coolant passage portion, the first coolant passage portion is positioned above the downstream region of the scroll portion, the first coolant passage portion includes a downstream region connected to an upstream region of the second coolant passage portion, the second coolant passage portion is cylindrical, the second coolant passage portion includes a downstream region connected to the coolant passage in the internal combustion engine, a direction of a center line of the first coolant passage portion is parallel to a direction of a rotation shaft of the centrifugal water pump, a direction of a center line of the second coolant passage portion is orthogonal to the direction of the center line of the first coolant passage portion, a rib for adjusting the coolant flowing inside the first coolant passage portion is disposed on an internal circumferential surface of the first coolant passage portion.