Energy-saving compression ignition engine with continuously variable compression ratio and flexible operation

Abstract

The invention discloses an energy-saving compression ignition engine with continuously variable compression ratio and flexible operation. The energy-saving compression ignition engine with continuously variable compression ratio and flexible operation comprises a fuel supply system, a combustion system and a flexible operation adjusting system, wherein the fuel supply system comprises an oil tank,a filter, an oil injection pump, an electric control oil injector and an energy accumulator. The combustion system comprises an intake valve, a cylinder block, a telescopic cylinder head, an exhaustvalve, a piston, a connecting rod and a crank. The flexible operation adjusting system comprises an oil inlet, an oil outlet, a cylinder head oil storage cavity, a return spring, an electromagnetic clutch, a controller, a temperature sensor and a pressure sensor. The cylinder head oil storage cavity is formed in the telescopic cylinder head, and the return spring and the electromagnetic clutch areuniformly distributed in the cylinder head oil storage cavity in the circumferential direction. The energy-saving compression ignition engine with continuously variable compression ratio and flexibleoperation has simple structure, simple and feasible adjustment method and high working reliability, fully meets the requirements of high and low load and other working conditions of the engine on combustion parameters such as compression ratio, combustion pressure and combustion temperature, has wide application range, and has good energy saving effect and emission reduction effect.

Description

technical field [0001] The invention relates to an energy-saving compression ignition engine, in particular to an energy-saving compression ignition engine with continuously variable compression ratio and flexible operation. Background technique [0002] The traditional engine block group is mainly composed of cylinder block, cylinder head, oil pan and so on. The main function of the cylinder head is to seal the upper part of the cylinder and form the combustion chamber together with the top of the piston and the cylinder. When the piston is at the top dead center, the volume between its top and the cylinder head is called the combustion chamber volume. When the piston is at the bottom dead center, the entire volume above its top is called the total volume of the cylinder. The ratio of the total volume of the cylinder to the volume of the combustion chamber is called the compression ratio. Once the traditional compression ignition engine is processed and assembled, the co...

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Problems solved by technology

[0004] First of all, the mechanism structure of this patent is complex, including the transmission mechanism, at least two sets of driving mechanisms, and the variable mechanism. It is necessary to modify the engine cylinder block, piston connecting rod group and other mechanisms at the same time. The cost is high and it is not suitable for large-scale engine transformation. And it is prone to failure during operation, especially in high-speed and heavy-load conditions

Secondly, the patent achieves variable displacement by deactivating a certain cylinder of a multi-cylinder engine, so its displacement changes only a few fixed displacement values, and for a single cylinder, its displacement does not change

Again, in this invention patent, the driving device of the variable mechanism drives the screw to rotate, and the adjusting part is screwed to the screw through the thread on the screw, so the adjustment of the compression ratio is adjusted according to a certain ratio, not continuous and stepless adjustment

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