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Compact electric cam phaser

A cam and camshaft technology, applied to engine components, machines/engines, valve devices, etc., can solve the problem that the engine oil pressure cannot fully supply the power of the hydraulic drive cam phaser

Inactive Publication Date: 2012-01-11
KOYO BEARINGS USA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During cracking, or during cold starts, engine oil pressure is often insufficient to power the hydraulically actuated cam phasers

Method used

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  • Compact electric cam phaser
  • Compact electric cam phaser
  • Compact electric cam phaser

Examples

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Embodiment Construction

[0021] The following detailed description serves to explain the invention by way of example, not to limit the invention. This description enables one of ordinary skill in the art to make and use the disclosure, and describes various embodiments, improvements, variations, alternatives and uses of the disclosure, including what is presently believed to be the best mode of the disclosure.

[0022] Look back at the pictures, especially figure 1 and figure 2 , the electric cam phaser as a whole is represented by A, which includes a sprocket 10, an input shaft 11, a differential gear train 12, an axial flux motor 13 arranged axially adjacent to the differential gear train 12, and an output shaft 14. The differential gear train 12 and the axial flux motor 13 are housed within a housing 26 .

[0023] The differential gear train 12 further includes an input sun gear 15 connected to the input shaft 11 , an output sun gear 16 connected to the output shaft 14 , a first set of planetary...

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Abstract

An electric cam phaser (ECP) for a camshaft of an internal combustion engine includes an axial flux electric machine (13) which is axially integrated with a positive differential gear train (12), and which is capable of providing frictional locking. The differential gear train (12) has three co-axial relatable branches. The first branch is connected to an input shaft (11), the second to the output shaft (14), and the third is integrated with a rotor (24) of the electric machine (13). The third branch is the control branch through which the differential gear train (12) can be unlocked from a neutral or ''locked'' mode of operation during phase adjustment by applying either a resistive torque in a second mode of operation, or a driving torque in a third mode of operation, though the electric machine (13) to the control branch.

Description

[0001] Related Application Cross Reference [0002] This application is related to, and claims priority to, US Provisional Patent Application Serial No. 61 / 121,694, filed November 11, 2008, which is hereby incorporated by reference. technical field [0003] This invention relates generally to methods and apparatus for varying the rotational position of a camshaft of an internal combustion engine to vary variable valve timing, and more particularly to a compact electrically actuated cam phase position adjustment system. Background technique [0004] Camshaft phasing position adjustment systems, also known as cam phasers, are used in internal combustion engines to vary the timing of valve opening and closing in order to improve fuel consumption and exhaust gas quality. With suitable cam phasers it is possible to adjust the valve timing for maximum comfort and / or maximum torque, or maximum engine performance. There are many types of cam phasers, most are hydraulic. Typically ...

Claims

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Application Information

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IPC IPC(8): F01L1/352
CPCF01L1/352F01L1/344
Inventor 艾小兰C.达文波特
Owner KOYO BEARINGS USA
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