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Internal combustion engine for small-sized vehicle

A technology for internal combustion engines and vehicles, which is applied to vehicle components, motorcycles, bicycles, etc., can solve the problems of large front and rear lengths of internal combustion engines, and achieve the effects of compacting internal combustion engines, shortening front and rear lengths, and reducing front and rear lengths.

Active Publication Date: 2013-02-06
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the internal combustion engine disclosed in the above-mentioned Patent Document 1, the vicinity of the front end of the tension arm is often arranged between the crankshaft and the main shaft, and the crankshaft and the main shaft are arranged separately in order to ensure the swing amount, so that the distance from the crankshaft to the countershaft becomes longer. As a result, , causing the front and rear length of the internal combustion engine to become relatively large

Method used

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  • Internal combustion engine for small-sized vehicle
  • Internal combustion engine for small-sized vehicle
  • Internal combustion engine for small-sized vehicle

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Embodiment 1

[0024] Figure 1 to Figure 7 shows an embodiment of the present invention.

[0025] First, in figure 1 Among them, the body frame F of a motorcycle as a small vehicle has: a head pipe 13 that can control the direction of the front fork 11 that supports the front wheel WF and a steering handle 12; a pair of left and right main frames 14. The pair of left and right main frames 14 extend backward and downward from the head pipe 13; the pivot plate 15 is continuously arranged on the rear end of the main frame 14; the pair of left and right lower frames 16, The pair of left and right lower frames 16 are continuously arranged on the head pipe 13 below the above-mentioned two main frames 14, and extend backward and downward at a larger angle than the main frames 14; the engine hanger 17 is arranged on the The lower end of the lower frame 16; the seat pipe 19 extending rearward and upward from the rear of the main frame 14; the rear frame 20 connecting the crankshaft 15 and the seat...

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Abstract

An internal combustion engine for a small-sized vehicle, in which a tension sprocket at one end of a tensioner arm is engaged with a cam chain of a timing and power transmitting mechanism mounted between a crankshaft and a camshaft and in which a gear transmission mechanism having a main shaft and a countershaft which are parallel to the crankshaft is housed in a crankcase. When viewed in the direction of the axis of the crankshaft (53), the countershaft (72) is located rearward of the crankshaft (53), the axis of the main shaft (71) is located at a position which is between the crankshaft (53) and the countershaft (72) and above a line interconnecting the crankshaft (53) and the countershaft (72), and a support shaft (96) for pivotably supporting the tensioner arm (95) is located between the axes of the crankshaft (53) and the main shaft (71). The construction reduces the length in the front-rear direction of the internal combustion engine.

Description

technical field [0001] The present invention relates to an internal combustion engine for a small vehicle. The internal combustion engine for a small vehicle includes: a crankshaft having an axis extending in the width direction of a vehicle body frame and being rotatably supported by a crankcase; The crankshaft is parallel to the axis and is freely rotatably supported on the cylinder head; the timing transmission mechanism has an endless cam chain and is arranged between the above-mentioned crankshaft and the above-mentioned camshaft; and the tension arm is on the One end has a tensioning sprocket, which is rotatably supported by the crankcase, and the tensioning sprocket is engaged with the cam chain in a direction to tension the cam chain; The cam chain lifter has a guide cylinder fixed to the crankcase, a push rod slidably supported by the guide cylinder and in contact with the other end of the tension arm; The crankshaft is parallel to the main shaft and the counter shaf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B67/06B60K17/06B62M7/02F02B61/02
CPCB62M7/02F16H3/16F02B61/02
Inventor 河野直树水谷文则
Owner HONDA MOTOR CO LTD
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