Engine respiratory system arranged on crankcase
A crankcase and breathing system technology, applied to engine components, crankcase ventilation, machine/engine, etc., can solve problems such as crankcase pressure imbalance, large oil consumption, and poor oil-gas separation, so as to improve reliability, The effect of reducing fuel consumption and reducing manufacturing costs
Active Publication Date: 2013-09-11
力帆科技(集团)股份有限公司
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Problems solved by technology
[0003] The invention aims to solve the problem of unbalanced pressure inside the crankcase, large oil consumption, and serious emission pollution caused by excessive
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[0024] The present invention will be further described below in conjunction with drawings and embodiments.
[0025] Such as figure 1 , figure 2 Shown is a perspective view of the crankcase body, which is formed by fastening the left crankcase 1 (indicated by a dotted line in the figure) and the right crankcase 2 (indicated by a solid line in the figure). A crank mounting hole 3 and a balance shaft mounting hole 4 are provided on the crankcase, and the balance shaft mounting hole 4 is located on the left side of the crank mounting hole 3 .
[0026] The crankcase body is provided with an isolation cavity half wrapped in the left side of the balance shaft mounting hole 4, and the isolation cavity starts from the top of the crankcase body and extends down to the bottom of the casing along the left side wall of the crankcase body. In order to make space for arranging the isolation cavity, the balance shaft mounting hole 4 is moved downward relative to the traditional structure w...
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The invention discloses an engine respiratory system arranged on a crankcase. A crank mounting hole (1) and a balance shaft mounting hole (2) are formed in the crankcase, an isolating cavity which semi-covers the left side of the balance shaft mounting hole is formed in the inner side of the crankcase, the isolating cavity extends from the top of the crankcase to the bottom of the crankcase along the left side wall of the crankcase, baffles (4) are disposed in the isolating cavity and divide the isolating cavity into an oil-gas separation front cavity (5), an oil-gas separation back cavity (6) and an oil return cavity (7) which are sequentially connected from top to bottom, an exhaust nozzle (8) communicated with the oil-gas separation back cavity is arranged at the top of the crankcase, a notch (4a) communicated with two adjacent cavities is formed in each baffle, an oil return port (7a) is arranged at the bottom of the oil return cavity, and the eccentric distance e which is larger than zero exists between the crank mounting hole and the central line (9) of a cylinder mounting hole. The engine respiratory system is matched with a corresponding right crankcase, and the problems of extra-high pressure in the crankcase, poor oil-gas separation and large lateral pressure of a piston during operation of an engine are solved.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to an engine breathing system arranged on a crankcase, and belongs to the technical field of mechanical structures. Background technique [0002] The crankcase is one of the essential parts of the engine. The left crankcase and the right crankcase are fastened together and locked by the closing bolts to form the engine crankcase. A crank mounting hole, a balance shaft mounting hole, a cylinder mounting surface, etc. are arranged on the crankcase body. Usually, the balance shaft mounting hole is located on the upper left side of the crank mounting hole. The main problems are: the box is in a sealed state, and the pressure is too high and the phenomenon of loss of balance often occurs. At the same time, the separation of oil and gas is not good, resulting in large engine oil consumption and large emission pollution. Contents of the invention [0003] The invention aims to solve the...
Claims
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Inventor 廖成云程志明张怡
Owner 力帆科技(集团)股份有限公司