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Hydraulic location of variable camshaft timing device

A phaser, liquid technology, applied in valve devices, fluid pressure actuation devices, machines/engines, etc., to achieve the effect of reducing swing

Inactive Publication Date: 2007-10-31
BORGWARNER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This contact or blocking can produce unwanted noise

Method used

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  • Hydraulic location of variable camshaft timing device
  • Hydraulic location of variable camshaft timing device
  • Hydraulic location of variable camshaft timing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] Referring to FIG. 1 , the vane VCT phaser includes a housing 1 with sprocket teeth 8 engaged with and driven by a timing chain 9 on the outside thereof. A cavity including fluid chambers 6 and 7 is formed within the housing 1 . The casing 1 has a rotor 2 coaxial with it and can rotate freely relative to it and a central control valve 4, wherein the rotor 2 has a vane 5 arranged between the chambers 6 and 7, and the central control valve 4 is used to transfer the pressurized oil It is sent to chambers 6 and 7 through channels 12 and 13, respectively. The pressurized oil entering the channel 12 through the valve 4 pushes the vane 5 to rotate counterclockwise relative to the housing 1 , and presses the oil in the chamber 6 into the channel 13 and the valve 4 . Those skilled in the art will recognize that the above description is generally general for vane phasers and that the specific arrangement of vanes, chambers, channels and valves shown in Figure 1 may vary within th...

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PUM

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Abstract

A phaser has a housing (1) and a rotor (2) rotating relative to each other. The housing (1) has cavity disposed to be divided by a vane (5) rigidly attached to the rotor (2). The vane (5) divides the cavity into a first chamber (6) and a second chamber (7). The phaser has passages (12, 13) connecting the first and the second chambers (5, 6) and a) a valve (4) disposed to form at least two openings for fluid flowing between the first chamber (6) and the second chamber(7), and being disposed to keep at least one opening closed; and b) at least one by-pass (30, 34, 36) disposed to stop or slow down the rotation between the housing (1) and the rotor(2), thereby allowing a locking mechanism to lock the housing (1) and the rotor (2) together independent of fluid flow.

Description

[0001] This patent application presents an invention that has been filed in Provisional Application No. 60 / 374,201 on April 19, 2002 entitled "Hydraulic Positioning of Variable Camshaft Timing". This application claims priority under 35 USC § 119(e) of the United States Provisional Application, the contents of which are incorporated herein by reference. technical field [0002] The present invention relates to variable camshaft timing (VCT) devices. More particularly, the present invention relates to hydraulic positioning of a variable camshaft timing device that reduces hydraulic positioning noise by creating a bypass. Background technique [0003] The performance of internal combustion engines can be improved by using dual camshafts, where one camshaft is used to control the intake valves for each cylinder of the engine, while the other camshaft is used to control the exhaust valves. Typically, one of the camshafts is driven by the engine crankshaft through a sprocket and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/34F01L9/02F01L1/344F15B15/12
CPCF01L1/34F15B15/12F01L1/344F01L1/3442F01L2001/3443F01L2001/34433F01L2810/04
Inventor F·R·史密斯B·温
Owner BORGWARNER INC