COOLING WATER PASSAGE STRUCTURE

摘要

A cooling water passage structure includes a cooling water passage in an internal combustion engine, a water pump, and a communication member. The communication member has a cooling water communication passage to supply cooling water from the water pump to the cooling water passage. The cooling water communication passage includes a water pump housing, a first cooling water passage, and a second cooling water passage. The water pump housing contains the water pump. The first cooling water passage has a substantially triangular shape that widens from a vertex on an upstream side. The second cooling water passage includes a cylindrical passage extending in a direction orthogonal to an operating axis of the water pump. The second cooling water passage is displaced from an operating plane of the water pump.

主权项

1. A cooling water passage structure comprising:
an internal combustion engine; a water pump; and a communication member having a cooling water communication passage for supplying cooling water from the water pump to a cooling water passage in the internal combustion engine, wherein the cooling water communication passage is formed by a water pump housing containing the water pump, a first cooling water passage, and a second cooling water passage; cooling water from the water pump housing passes through the first cooling water passage and the second cooling water passage to reach the cooling water passage in the internal combustion engine; the second cooling water passage is a cylindrical passage extending in a direction orthogonal to an operating axis of the water pump, the second cooling water passage being displaced from an operating plane of the water pump; and the first cooling water passage has a substantially triangular shape that widens from a vertex on the upstream side.