U-shaped piston reciprocating engine

Abstract

The invention discloses a U-shaped piston reciprocating engine. The U-shaped piston reciprocating engine is mainly characterized in that only a front row and a rear row of cylinders are equipped withconcentric output shafts (2); two corresponding same gear sets are separately arranged at the front part and the rear part of an engine body; two crankshafts (1, 3) have the same rated rotating speedwhich is equal to a certain fixed value; the rated rotating speed of the crankshafts is equal to the rated rotating speed outputted outwards by the crankshafts of an existing engine; the rated rotating speed of each output shaft is the rated rotating speed outputted outwards by the engine; in each gear set, the diameter of a reference circle of an output shaft gear (5) can be larger than or equalto or smaller than the diameter of the reference circle of a corresponding crankshaft gear, namely the rated rotating speed outputted by the engine is smaller than or equal to or larger than the ratedrotating speed of the crankshafts; so the engine can output a plurality of different rated rotating speeds for use of different equipment, and the application range of a single engine is widened. Besides, the U-shaped piston reciprocating engine also has the advantages that an existing L-shaped engine cylinder body and the crankshafts are simple in structure and easy to manufacture and maintain;the thermal efficiency is high; good stability is realized; and the engine body is short and convenient to arrange when the quantity of the cylinders of the engine is increased.

Description

technical field [0001] The invention belongs to the field of internal combustion engines, and in particular relates to a piston reciprocating engine with a new structure. Background technique [0002] Existing piston reciprocating engine, its body structure has multiple types, what usually uses has L type or V type engine, in addition, also has a small amount of M type, star type, and H type etc. engine. [0003] M-type and radial engines have complex structures, are difficult to manufacture and maintain, and are expensive. Their biggest advantages are compact structure, large number of single cylinders, high power, short fuselage length, and easy layout; And application, also can make the stand-alone power 3 to 4 times of the power without supercharging, therefore, the future of M type and radial engine is not optimistic; The dosage is also extremely limited. [0004] The L-type engine has a wide range of uses and a large amount of use. The cylinder block and connecting r...

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Problems solved by technology

[0003] M-type and radial engines have complex structures, are difficult to manufacture and maintain, and are expensive. Their biggest advantages are compact structure, large number of single cylinders, high power, short fuselage length, and easy layout; And application, also can make the stand-alone power 3 to 4 times of the power without supercharging, therefore, the future of M type and radial engine is not optimistic; The amount is also very limited

[0004] The L-type engine has a wide range of uses and a large amount of use. The cylinder block and connecting rod have simple structure, low price, high thermal efficiency, stable operation, large low-speed torque, and convenient manufacturing and maintenance. The biggest disadvantage is that the fuselage is long when the number of engine cylinders is increased. It is difficult to arrange the equipment; the V-type engine overcomes the shortcomings of the L-type engine, but the structure is complex, difficult to manufacture and maintain, expensive, and poor in stability. Especially the V10 engine requires a lot of energy and money to overcome its poor stability.

[0005] The common defect and weak point of above-mentioned existing engine are: 1. can not realize deactivation technology; The so-called deactivation technology, promptly engine starts or when low working condition only uses part to start the work of cylinder, other cylinders are in static do not move state, or when a single engine cylinder fails to operate, stop it in a static state, while other engine cylinders work as usual

② The calibrated speed of the engine is single, and one engine can only output one calibrated speed, which limits the application of the engine on equipment with different requirements for the calibrated speed, thus limiting the application range of a single engine

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