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Variable stroke engine

An engine and stroke technology, which is applied in the direction of engine control, combustion engine, machine/engine, etc., can solve the problems of crankshaft deformation friction, diameter increase, and bearing spacing lengthening, so as to prevent the deterioration of bearing support rigidity and realize small size Minimize and avoid the effect of crankshaft diameter increase

Inactive Publication Date: 2011-06-08
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the variable stroke engine disclosed in Patent Document 1 above, a drive gear for transmitting power to the camshaft side and a drive gear for transmitting power to the rotating shaft side are arranged adjacently on the crankshaft in the axial direction, and the crankshaft The bearing spacing becomes longer, and the diameter of the crankshaft has to be increased in order to avoid the deformation of the crankshaft or the increase of friction caused by the deterioration of the bearing support rigidity.

Method used

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  • Variable stroke engine
  • Variable stroke engine

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Embodiment Construction

[0031] Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the drawings.

[0032] figure 1 and figure 2 represents a first embodiment of the invention, figure 1 is a longitudinal sectional side view of the engine, and is along the figure 2 Sectional view of line 1-1. figure 2 is along figure 1 Sectional view of the 2-2 line.

[0033] The engine is an air-cooled single-cylinder engine for, for example, a working machine, and the engine main body 11 is composed of a crankcase 12, a cylinder block 13 protruding upward from the crankcase 12, a cylinder head 14 engaged with the head of the cylinder block 13, and The cylinder head cover 15 combined with the cylinder head 14 is comprised. In addition, the crankcase 12 is attached to engine mounts of various work machines with a mounting surface 12 a on the lower surface of the crankcase 12 .

[0034] The crankshaft 17 is rotatably supported by the crankcase...

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Abstract

The present invention provides a variable stroke engine which has a crankshaft, a camshaft, and a rotational shaft having an eccentric shaft, which are rotatably supported in a crankcase so as to have axes parallel to one another. A connecting rod is connected, at one end portion thereof, to a piston by a piston pin, and a control rod is connected, at one end portion thereof, to the eccentric shaft. The other end portion of the connecting rod and the other end portion of the control rod are linked to each other by a link member rotatably supported on the crankshaft. A rotative power of the crankshaft is transmitted to the camshaft and the rotational shaft, respectively. A timing driving wheel (49) transmitting the rotative power to the camshaft (26) side is mounted on the crankshaft (17), and a timing driven wheel (51) driven by the timing driving wheel (49) is mounted on the rotational shaft (37). The camshaft (26) is arranged at the same side with the rotational shaft (37) corresponding to the cylinder axis (C) on the plane where the axes of the crankshaft (17) are orthogonal.

Description

technical field [0001] The present invention relates to a variable stroke engine, and particularly to an improvement of a variable stroke engine in which a crankshaft, a camshaft constituting a part of a valve train, and a rotating shaft having an eccentric shaft have axes parallel to each other and are rotatably supported on In the crankcase of the engine main body, one end of the connecting rod is connected to the piston via a piston pin, one end of the control rod is connected to the eccentric shaft, and the other end of the connecting rod and the other end of the control rod are connected by the The crankshaft is connected to a connecting member that rotatably supports the crankshaft so as to transmit rotational power from the crankshaft to the camshaft and the rotary shaft, respectively. Background technique [0002] Such a variable stroke engine is already known from Patent Document 1 and the like. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2005-54685 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D15/02F02B75/04
CPCF02B75/048F02B41/04
Inventor 河野昌平渡边生
Owner HONDA MOTOR CO LTD