Energy-saving piston for diesel engine

Abstract

The invention discloses an energy-saving piston for a 6135AG diesel engine. The energy-saving piston comprises a piston top surface, a piston combustion chamber, a piston head, piston ring grooves, a skirt part, and a piston pin hole, wherein the piston pin hole is used for fixing and positioned at the skirt part, the piston is internally provided with a hollow cavity, the total height of the piston is 153-157mm, four piston ring grooves are sequentially arranged on the piston from top to bottom, four lubricating oil holes cast are evenly distributed at the periphery of the position at which the piston ring groove at the lowermost end of a piston ring bank is connected with the piston skirt part, a circular arc is arranged at the bottom end of the skirt part, and the skirt part is provided with a concave skirt part contraction window. The piston pin hole is provided with an inclined pin seat with an opened lower end. The cavity has an arch structure. The skirt part of the piston is of a variable elliptical surface, the middle part of the skirt part of the piston is convex, and the ellipticity and diameter of the skirt part of the piston are variable. The energy-saving piston has light weight, reasonable structure and small invalid frictional work loss, realizes the purposes of reducing fuel oil and engine oil consumption, saving energy resources, and decreasing the pollution and emission.

Description

technical field [0001] The invention relates to an assembly part of a high-speed medium-sized diesel engine, in particular to an energy-saving piston for a 6135AG diesel engine. Background technique [0002] Diesel engines are mainly used in mechanical equipment such as automobiles, ships, construction machinery, transportation machinery, generator sets, etc. The piston is one of the most critical parts in a diesel engine and is the "heart" of a diesel engine. It burns fuel in high-pressure air The generated explosive pressure is transmitted to the crankshaft through the crank connecting rod to do work and form power. The working conditions of the piston are quite harsh, and at the same time, it bears the effects of gas pressure, reciprocating inertial force, and periodic impact force of side pressure, which causes great mechanical stress and deformation of the piston. The top of the piston is directly heated periodically by high-temperature gas (the instantaneous maximum g...

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Problems solved by technology

The structural parameters of the 6135AG diesel engine piston disclosed in the prior art have a total height of 175mm, the circular arc of the bottom end surface of the piston and the lower end of the skirt is Φ155mm, and there are 8 small holes of Φ5.5 mm in the fourth ring groove. The cross-section of the internal profile is an eccentric circular ellipse. The piston has a large contact friction area during reciprocating motion, and its mass is 2850±50g. The weight of the piston with this structure is large, resulting in a large reciprocating inertial force during the working motion and a large friction loss work. more, the effective power is reduced, the fuel consumption and oil consumption are high, and there are gaps and deficiencies in power performance, economy, energy saving and environmental protection performance

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