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Air cooling internal combustion engine with oil temperature sensor

A technology of oil temperature sensor and internal combustion engine, which is applied in the direction of machine/engine, mechanical equipment, engine components, etc., can solve the problem of not being able to correspond with good accuracy, and achieve the effect of improving temperature detection accuracy

Active Publication Date: 2013-06-12
HONDA MOTOR CO LTD
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Problems solved by technology

[0004] However, when the return oil passage provided with the oil temperature sensor is close to the exhaust hole in the cylinder head, the lubricating oil in the return oil passage is easily affected by the temperature of the exhaust gas flowing through the exhaust hole (hereinafter simply referred to as "" The temperature of the exhaust hole"), the temperature detected by the oil temperature sensor and the temperature of the combustion chamber cannot correspond to each other with good accuracy.

Method used

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  • Air cooling internal combustion engine with oil temperature sensor
  • Air cooling internal combustion engine with oil temperature sensor
  • Air cooling internal combustion engine with oil temperature sensor

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no. 1 approach

[0029] First, refer to figure 1 , 2 , The air-cooled internal combustion engine E used in the present invention is mounted on an automatic two-wheeled vehicle as a vehicle together with a power transmission device having a V-belt automatic transmission M.

[0030] The internal-combustion engine E supported by the vehicle body is a single-cylinder 4-stroke internal-combustion engine in a horizontal configuration with the rotation center line L1 of the crankshaft 7 pointing to the left and right directions, and has a cylinder 1 in the direction of the cylinder axis L2 (hereinafter referred to as (cylinder axis direction) ) The crankcase 2 combined with the crankshaft 7 side of the cylinder 1, the cylinder head 3 combined with the anti-crankshaft 7 side of the cylinder 1 in the cylinder axis direction, and the cylinder head cover 4 combined with the cylinder head 3 constitute the main body of the internal combustion engine. The cylinder 1, the crankcase 2, the cylinder head 3, a...

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Abstract

An air-cooling internal combustion with oil temperature sensor is provided. The temperature of the lubricant oil being detected by an oil temperature sensor can rarely be affected by the temperature of exhaust hole, so that the temperature detecting accuracy of a combustion chamber can be improved. A return passage 59 for the lubricant oil which has lubricated a part, which needs to be lubricatedand is arranged on the cylinder cover 3, is arranged on the cylinder cover 3 and the cylinder 1. And the oil temperature sensor 61, arranged on the cylinder 1, detects the lubricant oil temperature in the return passage 59. Within the cylinder cover 3, cooling air passages are formed, which is positioned between a cover-side oil passage 59a, which is arranged at the upper part of the oil temperature sensor 61, and the exhaust holes 14 within the return passage 59.

Description

technical field [0001] The present invention relates to an air-cooled internal combustion engine having a cylinder head provided with a combustion chamber and an exhaust port, and an oil temperature sensor for detecting the temperature of lubricating oil. technical background [0002] In order to detect the engine temperature of an air-cooled internal combustion engine, it is well known to provide an oil temperature sensor that detects the temperature of lubricating oil in a return oil path that circulates lubricating oil after lubricating a lubricating portion provided in a cylinder head. (refer to patent document 1) [0003] Patent document: Japanese Patent Laid-Open No. 2000-213326 [0004] However, when the return oil passage provided with the oil temperature sensor is close to the exhaust hole in the cylinder head, the lubricating oil in the return oil passage is easily affected by the temperature of the exhaust gas flowing through the exhaust hole (hereinafter simply ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D35/00F01M1/06F01M11/10
Inventor 挂水贤一郎
Owner HONDA MOTOR CO LTD
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