Expansion ratio adjustable pneumatic engine for automobile and its exhaust pressure control method
A pneumatic engine, exhaust pressure technology, applied to the direction of the one-way flow engine, engine components, variable displacement engine, etc., can solve the problem of low effective energy utilization, to avoid the loss of effective energy of compressed air, reduce compression Air exergy loss, effect of improving energy conversion efficiency
Inactive Publication Date: 2010-12-29
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0006] In order to overcome the shortage of low effective energy utilization rate of the existing vehicle air engine due to decompression loss and exhaust loss, the present invention provides a vehicle air engine with adjustable expansion ratio, which can avoid the existing vehicle air engine. Effective energy loss of the engine in the decompression link and exhaust link, improving the energy conversion efficiency of the pneumatic engine
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[0027] The present invention will be further described below in conjunction with the drawings and embodiments.
[0028] Such as figure 1 As shown, the automotive pneumatic engine with adjustable expansion ratio consists of a gas storage tank 1, a shutoff valve 2, a high pressure pipe 3, a flow regulating valve 4, an intermediate pipe 5, an intake solenoid valve 6, an intake pipe 7, a cylinder 14, and a cylinder head. 13. Piston 15, exhaust pipe 9, exhaust solenoid valve 10, low pressure pipe 11, air outlet 12, pressure sensor 8, connecting rod 16, crankshaft 17, photoelectric encoder 18 and controller 19. Compressed air starts from the air storage tank 1, and passes through the shutoff valve 2, the high pressure pipe 3, the flow control valve 4, the intermediate pipe 5, the intake solenoid valve 6, the intake pipe 7, the cylinder 14, the exhaust pipe 9, and the exhaust solenoid valve. 10. The low pressure pipe 11 and the air outlet 12 are finally discharged into the atmosphere. ...
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The invention relates to a pneumatic engine for car use and discloses a pneumatic engine for car use with an adjustable expansion ratio and an exhaust pressure control method. According to the pneumatic engine for car use with the adjustable expansion ratio, compressed air is expanded in a cylinder so as to propel a piston and drive a crankshaft to rotate through a connecting rod and output rotating mechanical work to the outside. The pneumatic engine is characterized in that the pneumatic engine comprises an air inlet electromagnetic valve which is arranged in a cylinder air inlet pipe, an exhaust electromagnetic valve which is arranged in a cylinder exhaust pipe, a pressure sensor which is used for detecting the air pressure inside the cylinder, a photoelectric encoder which is used fordetecting a crankshaft rotation angle, and a controller; and the controller makes a policy according to the cylinder air pressure detected by the pressure sensor and the crankshaft rotation angle of the photoelectric encoder, and sends a control signal of opening or closing to the air inlet electromagnetic valve and the exhaust electromagnetic valve. The pneumatic engine reduces the compressed air available energy loss caused by high pressure exhaust, thereby improving the energy conversion rate of the pneumatic engine.
Description
Technical field [0001] The invention relates to a pneumatic engine for vehicles, in particular to a pneumatic engine for vehicles with adjustable expansion ratio and a method for controlling exhaust pressure thereof. Background technique [0002] Pneumatic engine is an important component of the power system of zero-pollution, environment-friendly and energy-saving vehicles. Its function is to convert the effective energy of compressed air into rotating mechanical energy required to drive the vehicle. [0003] The existing vehicle pneumatic engine generally consists of parts such as an engine body, a pressure reducing valve, a flow regulating valve, a gas storage tank, and a gas pipeline. The compressed air is stored in the air storage tank. When the pneumatic engine is working, the compressed air flows through the air pipeline, pressure reducing valve, flow regulating valve, air inlet, cylinder and exhaust port, and finally discharged into the atmosphere. The pressure reducing va...
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IPC IPC(8): F01B17/02F01B25/02
Inventor 谢小鹏徐正冈陈树林
Owner SOUTH CHINA UNIV OF TECH