| 摘要 |
PURPOSE:To make an exhaust-gas purifying apparatus in a compact structure, by forming check valves disposed in secondary-air supply passages communicated with exhaust passages in the manner that they are made unitary with respective members for connecting cooling-water feed pipes. CONSTITUTION:A V-type four-cylinder internal-combustion engine 1 mounted on a motor cycle is composed of a pair of right and left front cylinders 1A, 1B and a pair of right and left rear cylinders 1C, 1D which are arranged in a V-shaped form. Cooling water is introduced into one connecting member 5a via a pipe 51 and then carried into another connecting member 5b via a connecting pipe 52 by a cooling-water pump. Cooling water supplied from these connecting members 5a, 5b to water jackets 16 of each cylinder 1A-1D is carried to a radiator via a pipes 53a, 53b, a thermo-switch 17 and a pipe 54. Further, secondary-air supply passages 32 communicated with exhaust passages of each cylinder are connected to an air cleaner via the pipe 51 and check valves 4a, 4b formed integrally with the cooling-water connecting members 5a, 5b. |
