Belt type cam phaser

A cam phaser and belt-type technology, applied in the direction of machines/engines, engine components, mechanical equipment, etc., can solve parts through holes, timing errors, engine valve mechanism response speed, control accuracy and control stability decline, etc. problems, to achieve the effect of ensuring response speed, preventing external leakage, and eliminating external leakage of powder metallurgy

Inactive Publication Date: 2016-09-07
MIANYANG FULIN PRECISION MACHINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the pulleys in the cam phaser of this structure are generally made of powder metallurgy materials, during the manufacturing or working process of such powder metallurgy pulleys, due to material and process reasons, such as the existence of powder particle gaps or pores in powder metallurgy, it is easy to Causes through-holes in parts, making it impossible to guarantee that belt cam phasers are 100% free from external leakage
However, when the external leakage of the belt-type cam phaser occurs, the response speed, control accuracy and control stability of the engine valve mechanism will all decrease, resulting in a decrease in the overall performance of the engine, and it may also cause the belt connected to the phaser to slip, causing Timing error, and even cause damage to the engine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] Such as figure 1 , figure 2 The belt-type cam phaser shown mainly includes a pulley 1, a rear cover 2, a rotor 3 and a shell structure. The shell structure includes a front cover 6 and a housing 7, and the housing 7 is located on the rear cover 2 Between the front cover 6, the pulley 1 is attached to the outside of the rear cover 2, and passes through the pulley 1, the rear cover 2, the housing 7, and the front cover 6 through the first connector 5, and makes the pulley 1, The rear cover 2, the housing 7, and the front cover 6 are fixedly connected into one body, and the housing 7 is connected with the rear cover 2 and the front cover 6 respectively to form a sealed working chamber in a sealed manner, and the rotor 3 is fitted with a clearance installed in the working chamber.

[0025] The first connector 5 preferably adopts screws, which are not only convenient for assembly and disassembly, but also reliable for connection. The housing 7 is preferably an aluminum a...

Embodiment approach 2

[0027] Such as image 3 , Figure 4 The belt-type cam phaser shown mainly includes a pulley 1, a rear cover 2, a rotor 3 and a shell structure. The shell structure includes a front cover 6 and a housing 7, and the housing 7 is located on the rear cover 2 Between the front cover 6, the pulley 1 is attached to the outside of the rear cover 2, and the pulley 1 and the rear cover 2 are fixedly connected through the pulley 1 and the rear cover 2 through the second connecting piece 9, The rear cover 2 , housing 7 , and front cover 6 are fixedly connected together through the third connecting piece 10 through the rear cover 2 , housing 7 , and front cover 6 , and the others are the same as those in Embodiment 1.

[0028] The second connecting piece 9 and the third connecting piece 10 are also preferably made of screws, which are not only convenient for assembly and disassembly, but also reliable in connection. Compared with the belt-type cam phaser in Embodiment 1, the belt-type ca...

Embodiment approach 3

[0030] Such as Figure 5 , Image 6 The belt-type cam phaser shown mainly includes a pulley 1, a rear cover 2, a rotor 3 and a shell structure. The shell structure includes a housing 7, and the housing 7 and the pulley 1 are respectively located on the rear cover 2. The opposite sides, and between the pulley 1, the rear cover 2, and the housing 7 are fixedly connected together through the first connecting piece 5 through the pulley 1, the rear cover 2, and the housing 7; the housing 7 and the rear cover 2 form a sealed working chamber in a sealed connection, and the rotor 3 is installed in the working chamber in a clearance fit manner. Offer a groove on the contact end face of the housing 7 that is in contact with the rear cover plate 2, and install the first sealing ring 4 in the groove, as Image 6 As shown, by adding the first sealing ring 4 at the contact position between the rear cover 2 and the housing 7, the sealing performance between the rear cover 2 and the housing...

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PUM

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Abstract

The invention provides a belt type cam phaser. The belt type cam phaser comprises a belt pulley (1), a rear cover plate (2), a rotor (3) and a shell structure, wherein the rear cover plate (2) and the shell structure are connected for forming a working cavity in a sealed mode, the rotor (3) is installed inside the working cavity, and the belt pulley (1) is located on the outer side of the rear cover plate (2) and is connected and fixed to the rear cover plate (2). The working cavity can be formed by connecting a shell (7) and the rear cover plate (2) in a sealed mode or connecting the shell (7), a front cover plate (6) and the rear cover plate (2) in a sealed mode. According to the belt type cam phaser, the belt pulley actually is not involved in sealing of the working cavity of the belt type cam phaser, and therefore the belt pulley avoids the possibility of external leakage of powder metallurgy, the phenomenon that a belt type cam phaser assembly leaks due to the belt pulley is effectively prevented, and the response speed, the control accuracy and the control stability of the belt type cam phaser assembly are guaranteed.

Description

technical field [0001] The invention relates to the technical field of cam phasers, in particular to a belt-type cam phaser used in a variable valve timing system of an automobile engine. Background technique [0002] The engine variable valve timing system has been widely used in new automobile engines to increase engine power and torque, reduce fuel consumption and exhaust emissions, and improve the level of energy saving and consumption reduction of the engine. [0003] In the current engine variable valve timing system, the working chamber of the cam phaser is a working chamber jointly formed by the belt pulley, the housing, the rotor and the cover plate. Because the pulleys in the cam phaser of this structure are generally made of powder metallurgy materials, during the manufacturing or working process of such powder metallurgy pulleys, due to material and process reasons, such as the existence of powder particle gaps or pores in powder metallurgy, it is easy to This r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344
CPCF01L1/344
Inventor 谭建伟刘佑杰刘锐王川陈磊王艳
Owner MIANYANG FULIN PRECISION MACHINING
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