Hydraulic gas distribution switching mechanism for variable stroke engine
A switching mechanism and engine technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of large changes to the engine cylinder head and slow response speed of electromagnetic drive switching, and achieve small changes to the original machine, simple structure, and easy switching fast effect
Inactive Publication Date: 2016-05-04
YANSHAN UNIV
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Problems solved by technology
This mechanism needs to realize mode switching through electromagnetic drive, and the engine cylinder head has been greatly changed. In addition, this mechanism has relatively high requirements on switching timing and speed, while the switching response speed of electromagnetic drive is relatively slow.
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[0018] exist figure 1 , figure 2 , image 3 and Figure 4 In the schematic diagram of the hydraulic valve switching mechanism of the variable stroke engine shown, the gas distribution switching mechanism includes: a camshaft 1 fixedly connected to the cams of two modes, a left half shaft 2 and a right half shaft 3 . Among them, the intake and exhaust cams of two different modes of two strokes and four strokes are the cam bodies composed of intake cam 5 in two stroke mode, intake cam 6 in four stroke mode, exhaust cam 7 in two stroke mode and exhaust cam 8 in four stroke mode. Set in the middle of the camshaft in turn, all the cams share a base circle and are integrated with the camshaft. The two-stroke intake and exhaust cams are double-peak cams, the four-stroke intake and exhaust cams are single-peak cams, and the two-stroke mode cams are single-peak cams. There is a smooth transition zone between the cam and four-stroke mode. The camshafts on both sides of the cam are ...
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A gas distribution switching mechanism for a variable-stroke engine, which mainly includes: intake and exhaust cams in two different modes of two-stroke and four-stroke are arranged in the middle of the camshaft and connected with the camshaft as a whole, and the camshafts on both sides of the cam are provided with Rectangular external splines, and the lengths of the rectangular external splines on both sides are equal. An annular groove is provided at the end of the bare section of the camshaft other than the two external splines, and a sealing ring is provided in it, which is provided on the left side of the camshaft. 1. The right half shaft is a tubular body coaxial with the camshaft, inside which there are rectangular inner splines corresponding to the outer splines on the camshaft and a hole corresponding to the bare section of the camshaft. The diameter of the hole is larger than the oil passage on the outside The inner end of the oil passage is provided with an internal thread, and the above-mentioned left and right half shafts are provided with shaft sections. The invention integrates two stroke modes into one engine, has a compact structure, requires little modification to the engine cylinder, and relies on hydraulic oil to realize the switching, making the switching more stable, and at the same time further improving the comprehensive performance of the engine.
Description
technical field [0001] The invention relates to an engine valve switching mechanism. Background technique [0002] Modern reciprocating piston internal combustion engines can be divided into two types of two-stroke and four-stroke from the perspective of working stroke. The former has the characteristics of large power per liter and small fluctuation in torque output cycle. Under heavy load conditions, this advantage is more prominent than that of the four-stroke engine; while for the four-stroke engine, the ventilation process is carried out in two different piston strokes. , less ventilation loss and smaller residual exhaust gas coefficient in the cylinder after ventilation, high thermal efficiency, so it is obviously more advantageous than two-stroke engines in terms of fuel consumption and emissions. If the two stroke modes are combined on one engine, the requirements of engine power, economy and emission can be met by switching between the two modes. [0003] U.S. Pat...
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IPC IPC(8): F01L9/02F01L13/00F02B75/02F01L9/10
Inventor 夏怀成田金成杜丹阳邢宏祥周贝贝谷浩安子军梁月
Owner YANSHAN UNIV