ENFORCED BLOWING TYPE COOLER FOR WORKING MACHINE OF ENGINE

Japanese Patent JPH02163409

A

PURPOSE:To simplify the cooling structure of a muffler and improve the cooling efficiency by allowing the cooling discharged air supplied from a radiator to be guided by a part of the bonnet of an engine working machine and to blow onto the muffler, in the enforced blowing type cooling device for the engine working machine equipped with a liquid cooling type radiator on the engine side. CONSTITUTION:A bonnet 6 is arranged at least on the upper side of an engine E and a radiator 1, and a muffler 5 is arranged on the lateral side surface of the engine E and the radiator 1. The inner surface of the wall surface part 7 of the bonnet 6 which is close to the radiator 1 and the muffler 5 is formed as the guide surface for the cooling air, and the cooling discharged air which is discharged upwardly from a fan case 2 and the radiator 1 is guided by the wall surface part 7 of the bonnet and blown onto the muffler 5. Since the inner wall surface of the bonnet 6 is constituted so as to use parts in common with the guide surface for the cooling air, the need of separately installing a guide plate is obviated, and the cooling structure of the muffler 5 can be made simple. Further, since cooling discharged air is collided concentrically onto the muffler 5 by the wall surface part 7, the diffusion of the cooling air is suppressed, and the muffler can be cooled efficiently.

JP2999097	VIBRATION-PROOFING DEVICE FOR MOWER
JP2007309165	PORTABLE WORKING MACHINE

SHINOHARA YOSHINORI

JP31912988A

June 22, 1990

December 16, 1988

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KUBOTA LTD

F02B63/00; F01P5/06; (IPC1-7): F01P5/06; F02B63/00

Juichi Chatan

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