Rocker arm compartment assembly for heavy-duty diesel engine

Abstract

A rocker arm compartment assembly for a heavy-duty diesel engine comprises a rocker arm compartment and a cam bearing cap. The top of the rocker arm compartment is connected with a cylinder head cover. The bottom of the rocker arm compartment is connected with a cylinder head. A first intake camshaft installation groove and a first exhaust camshaft installation groove are symmetrically formed in the rocker arm compartment. The cam bearing cap comprises first cam bearing cap bodies and second cam bearing cap bodies. The top of each first cam bearing cap and the top of each second cam bearing cap are each provided with an intake rocker arm shaft installation arc surface matched with an intake rocker arm shaft and an exhaust rocker arm shaft installation arc surface matched with an exhaust rocker arm shaft. The bottom of each first cam bearing cap and the bottom of each second cam bearing cap are each provided with a second intake camshaft installation groove matched with the first intake camshaft installation groove and a second exhaust camshaft installation groove matched with the first exhaust camshaft installation groove. The rocker arm compartment assembly is applicable to the engine with double overhead camshafts and double rocker arm shafts; besides, part distribution is simplified while step-by-step braking of the engine is achieved.

Description

technical field [0001] The invention relates to related components of automobile engines, in particular to a rocker chamber assembly for a heavy-duty diesel engine, which is suitable for engines with double overhead camshafts and double rocker shaft structures. Background technique [0002] The air distribution mechanism of a traditional engine is directly installed on the top surface of the cylinder head, which not only requires multiple installation bosses and corresponding installation parts, but also requires processing many horizontal and vertical parts on the cylinder head in order to meet the lubrication of the air distribution mechanism. The lubricating oil channel of the cylinder head makes the design of the top of the cylinder head too complicated; at the same time, in order to avoid mutual interference between parts, many avoidances need to be done, which greatly increases the difficulty of the design and processing of the cylinder head. The installation and posit...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent: The authorized announcement number is CN102392708A, and the authorized publication date is March 28, 2012. The invention patent discloses an engine camshaft bearing frame. The device is composed of a camshaft frame body and a cam bearing cover. Fastened on the camshaft frame body, the camshaft frame body is provided with the valve chamber cover and the fuel injector compression screw sleeve, and the camshaft bearing frame is installed on the cylinder head, although the invention realizes the double overhead camshaft engine However, this is only a very simple prototype structure. Since there is no more attention to the installation and positioning of the rocker shaft, the layout of the lubricating oil circuit, etc., the structural application of the cam bearing cover and the frame is a Extremely simple, in today's strict control of engine quality, there are still some problems in fully and effectively applying the above structure to double overhead camshaft and double rocker shaft engines

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