Bulldozer

Abstract

In the engine compartment of a bulldozer the radiator is arranged forward of the engine. An exhaust gas treatment unit is arranged above the engine. A first exhaust gas treatment device of the exhaust gas treatment unit is arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. A second exhaust gas treatment device of the exhaust gas treatment unit is positioned to the side of the first exhaust gas treatment device, and arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. The air cleaner is arranged between the radiator and the exhaust gas treatment unit in the forward-backward direction of the vehicle.

Description

TECHNICAL FIELD[0001]The present invention relates to a bulldozer.BACKGROUND ART[0002]In recent years bulldozers are being mounted with a high level exhaust gas treatment device in order to protect the environment. An exhaust gas treatment device is a device that purifies exhaust gas from an engine. An exhaust gas treatment device may be for example, a device that lowers the level of nitrogen oxide (NOx), a device that lowers the level of carbon monoxide (CO) or a device that removes particulate matter. In the diesel engine exhaust gas treatment system disclosed in Patent document 1 for example, two exhaust gas treatment devices are arranged above the engine together with an air cleaner. The direction in which these exhaust gas treatment devices are arranged is such that the longitudinal direction of the device intersects with the longitudinal direction of the engine.PRIOR ART DOCUMENTSPatent Document[0003]Patent Document 1[0004]U.S. Pat. No. 8,141,535OUTLINE OF THE INVENTIONProblem...

AI Technical Summary

Benefits of technology

The invention provides a bulldozer with improved exhaust gas processing and reduced visibility from the cab in the forward direction. It also prevents heat from the exhaust gas treatment unit from affecting the radiator. The patent describes the configuration of the engine compartment and the removal of a side panel to better show the engine and its peripheral devices.

Problems solved by technology

Further, each of the exhaust gas treatment devices is of substantial size.

The engine compartment being of substantially large dimensions in the widthwise direction of the vehicle may cause a deterioration in visibility from the cab in the forward direction.

For example, when an operator operates the bulldozer while viewing the left and right ends of the blade from the cab, the field of vision from the operator to the blade may be obstructed by the engine compartment.

If an exhaust gas treatment device is arranged in close proximity to the radiator however, the radiator receives a substantial heat effect from the exhaust gas treatment device as that device heats up.

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