Cooling structure of water-cooled engine

Patent metadata

Field	Value
Publication number	US-10641200-B2
Application number	US-201715827670-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Dec 28, 2016
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A cooling structure of a water-cooled engine includes: a plurality of cylinders 2 arranged in a cylinder block 1 ; and a water jacket W formed around the plurality of cylinders 2 . The water jacket W includes a pair of main flow paths 7, 8 formed in a state of extending in a cylinder arrangement direction outside the cylinders, and inter-bore flow paths 9, 10 formed between adjacent cylinders 2 in a state of connecting the pair of main flow paths 7, 8 . Guide walls 11 h, 13 h , capable of guiding the cooling water flowing in the main flow paths 7, 8 to the inter-bore flow paths 9, 10 , are formed in the cylinder block 1.

First claim

What is claimed is:

1. A cooling structure of a water-cooled engine, comprising:
a plurality of cylinders arranged in a cylinder block; and
a water jacket formed around the plurality of cylinders,
wherein
the water jacket includes a pair of main flow paths formed in a state of extending in a cylinder arrangement direction outside the cylinders, and inter-bore flow paths formed between adjacent cylinders in a state of connecting the pair of main flow paths, and
guide walls, capable of guiding the cooling water flowing in the main flow paths to the inter-bore flow paths, are formed in the cylinder block and in a cylinder outer frame portion that surrounds the water jacket in the cylinder block, and
at least some of the guide walls are formed as arc-shaped rib walls along circumferential directions of the cylinders.

2. The cooling structure of the water-cooled engine according to claim 1 , wherein the guide walls corresponding to the inter-bore flow paths, adjacent to each other in the cylinder arrangement direction, are formed in a state of guiding the cooling water to the inter-bore flow paths in opposite directions to each other.

3. The cooling structure of the water-cooled engine according to claim 1 , wherein the guide walls corresponding to the inter-bore flow paths, adjacent to each other in the cylinder arrangement direction, are formed in a state of guiding the cooling water to the inter-bore flow paths in the same direction with each other.

Assignees

• Kubota Kk

Inventors

• Oso Hiroki
• Yamazaki Takahiro
• Koyama Hideyuki
• Kaneko Rina
• Tanaka Yoshinori
• Yamaguchi Takashi
• Tanaka Akira

Classifications

• F02F1/10 Primary

  for liquid cooling · CPC title

• F01P2003/021

  Cooling cylinders · CPC title

• F02F1/14 Primary

  Cylinders with means for directing, guiding or distributing liquid stream · CPC title

• F02F2001/106

  using a closed deck, i.e. the water jacket is not open at the block top face · CPC title

• F01P3/02

  Arrangements for cooling cylinders or cylinder heads · CPC title