Variable-compression-ratio engine
A technology of engine and compression ratio, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problem of high engine pollution, achieve the effect of stable operation, high efficiency, and reduced friction loss
Inactive Publication Date: 2014-09-10
梁天宇
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[0003] The variable compression ratio engine of the present invention has fewer parts, simple control, and high efficiency. The compression ratio can be freely varied from 8 to 22 or even a larger range. The two-stroke design of direct injection in the cylinder can not only solve the problem of high pollution of the two-stroke engine It also improves the fuel efficiency of the engine and reduces the emission of harmful substances. It is especially suitable for HCCI technology. The structure of the connecting rod and the crankshaft is designed as a three-link double crankshaft pair. The piston will not generate side pressure, which reduces friction loss. Three-link The double crankshaft structure can also increase the rotation angle of the crankshaft in the power stroke compared with the compression stroke, and the rotation angle exceeds 180 degrees, which is equivalent to an increase in the distance of the crankshaft doing work, which can convert more heat energy into mechanical energy, which can not only improve fuel efficiency, but also make the Engine runs more smoothly
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[0021] The engine ECU controls the actuator to slide the slider back and forth, and the slider then drives the cylinder head to move up and down to change the compression ratio of the engine. The slider moves forward, the cylinder head goes down, and the compression ratio becomes larger. When the engine knock sensor detects knock, the ECU sends an instruction to the actuator to control the slider to retreat to reduce the compression ratio to eliminate knock. Under various working conditions, the ECU will control the actuator to use the engine with the most suitable compression ratio. , Try to let the engine run under the maximum compression ratio that it can withstand without knocking, so as to improve fuel efficiency and reduce emission pollution.
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The invention provides a variable-compression-ratio engine. The variable-compression-ratio engine is characterized in that a movable cover is arranged at the upper part of a cylinder and can move up and down under the control of a sliding block. According to the variable-compression-ratio engine, the compression ratio of the engine can be changed by changing the capacity of the cylinder; a power output mechanism is a three-connecting-rod double-crankshaft movement pair that raises the rotating angle of a power stroke crankshaft, namely, the power stroke is extended, and therefore, the vibration of the engine can be lowered down, the efficiency of the engine can be raised, and the discharged harmful substances can be decreased.
Description
technical field [0001] The invention is a variable compression ratio engine, which is characterized in that there is a movable cylinder head on the upper part of the cylinder, the cylinder head moves up and down through a slider, and the compression ratio of the engine is changed by changing the cylinder volume. The output mechanism is a three-link double crankshaft pair, and the crank angle of the power stroke is increased, which is equivalent to increasing the length of the power stroke, which can reduce the vibration of the engine, improve the engine efficiency, and reduce the emission of harmful substances. Background technique [0002] The technology that has not yet broken through in automobile engines is the variable compression ratio technology. All mass-produced engines in the world today are all fixed compression ratio engines. The performance of fixed compression ratio engines is stable and reliable. After decades of technological innovation, the performance has be...
Claims
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IPC IPC(8): F02B75/04F02B75/24F02B75/32F02D15/04
Inventor 梁天宇
Owner 梁天宇