Variable-stroke pneumatic internal combustion hybrid power engine and running method thereof

Abstract

The invention discloses a variable-stroke pneumatic internal combustion hybrid power engine and a running method of the variable-stroke pneumatic internal combustion hybrid power engine. The variable-stroke pneumatic internal combustion hybrid power engine comprises at least two air cylinders, each air cylinder is provided with a piston, a connecting rod and a crankshaft, and each air cylinder is provided with an exhaust valve, an inlet valve and a compressed air valve. The engine can achieve switching of engine strokes and four work modes through a mechanical structure, a switching mechanism is simple, the overall structure of the engine is more compact than other hybrid power modes, space is saved, and when the engine works in a two-stroke air compressor mode, brake energy recovery can be achieved, and the effect of saving energy can be achieved. Recovered brake energy is stored in an air tank, the reasonable engine work modes are selected according to different running work conditions, the hybrid power engine can be made to work in the optimal area, and the dynamic property, economical efficiency and the emission property achieve the more ideal state. The internal combustion engine work area adjusting function is achieved, an internal combustion engine can be made to work in the efficient area, and redundant power is used for recycling compressed air.

Description

technical field [0001] The present invention relates to a power engine and its operating method, more specifically, the present invention relates to a variable stroke pneumatic internal combustion hybrid engine and its operating method. Background technique [0002] With the continuous deepening of the theme of energy saving and emission reduction, the automobile industry is committed to seeking new technologies with high efficiency and energy saving to meet the increasingly stringent emission regulations. Pneumatic-internal-combustion hybrid power can use the air-driven engine to recover the residual energy of the internal-combustion engine, which is a favorable way to achieve high efficiency and low emissions. Chinese patent [CN200710067863.0], Chinese patent [CN201020158252.4] and Chinese patent [201120165652.2] respectively proposed the system mode of the pneumatic internal combustion hybrid engine. These patents may use the exhaust of the internal combustion engine to h...

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Problems solved by technology

Chinese patent [CN200710067863.0], Chinese patent [CN201020158252.4] and Chinese patent [201120165652.2] respectively proposed the system mode of the pneumatic internal combustion hybrid engine. These patents may use the exhaust of the internal combustion engine to heat the intake air of the pneumatic engine to increase the work done by the compressed air Usable energy; or introduce the exhaust of the internal combustion engine into the air engine for expansion, and recover the exhaust residual pressure; or use compressed air to supercharge the internal combustion engine to improve the transient response and liter power of the internal combustion engine, but none of them involve the recovery and utilization of engine braking energy

Since most of the pneumatic motors are two-stroke engines, and most of the internal combustion engines are four-stroke engines, the existing design of aerodynamic internal combustion hybrid power needs to couple the two, the structure is complex, and the hybrid system cannot keep working in the optimal area.

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