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Internal combustion engine

A technology of internal combustion engine and inner peripheral surface, which is applied in mechanical equipment, engine components, machines/engines, etc., and can solve problems such as insufficient oil quantity

Inactive Publication Date: 2016-03-09
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the amount of oil supplied to the sliding surface of the piston pin and the pin hole may become insufficient

Method used

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  • Internal combustion engine
  • Internal combustion engine
  • Internal combustion engine

Examples

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Embodiment Construction

[0031] will be referred to below Figure 1 to Figure 10 One embodiment of the present invention as a concrete example of an internal combustion engine will be described. Furthermore, this embodiment of the invention relates to an in-line internal combustion engine having cylinders arranged in-line. This internal combustion engine is installed in a vehicle in a state where each cylinder is vertically upright.

[0032] Such as figure 1 As shown, a cylinder block 10 of an internal combustion engine is provided with cylinders 11 . A piston 12 is accommodated in the cylinder 11 in a reciprocatable manner. Piston 12 is connected to crankshaft 14 via connecting rod 13 .

[0033] In addition, the internal combustion engine is provided with an oil pan 21 that stores oil below the cylinder block 10 . The oil in the oil pan 21 is pumped up by the oil pump 22 and forcibly fed to the oil supply passage 23 . The supply passage 23 is connected to the oil injection passage 24 . The oil...

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PUM

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Abstract

An internal combustion engine is equipped with a connecting rod (13) and an oil jet (25). The connecting rod has a small end portion (15) that is coupled to a piston (12), and the small end portion and a large end portion that is coupled to a crankshaft are connected to each other by a shaft portion (17). The oil jet injects oil toward a reverse face of the piston (12). With this internal combustion engine, a communication hole (20) that opens toward the reverse face of the piston and that communicates with a pin hole (19) is provided through the small end portion of the connecting rod. A lower portion (28) of an inner peripheral face (30) that forms the pin hole of the small end portion protrudes more in a direction of extension of a central axis of the pin hole than an upper portion (29).

Description

technical field [0001] The invention relates to an internal combustion engine. Background technique [0002] The connecting rod of the internal combustion engine is provided with a pin hole through which a piston pin is inserted. A connecting rod has a small end coupled to the piston via a piston pin and a large end connected to the crankshaft. [0003] Japanese Utility Model Application Publication No. 4-125618 (JP4-125618U) discloses the following configuration: the small end of the connecting rod is provided with a communication hole, and the communication hole penetrates through the outer peripheral surface of the small end to form the inner peripheral surface of the pin hole, and Open above the small end. According to this configuration, when the oil sprayed from the oil nozzle toward the back of the piston drops from the back of the piston to the outer peripheral surface of the small end portion, the dropped oil flows into the pin hole through the communication hole,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01M1/06F01P3/08F16C7/02
CPCF01M1/08F01M2001/066F01M2001/086F02F3/16F02F7/0002F16C3/08
Inventor 吉田功
Owner TOYOTA JIDOSHA KK