VCT system with control valve bias at low pressures and unbiased

Details VCT system with control valve bias at low pressures and unbiased VCT system with control valve bias at low pressures and unbiased

1993-03-04

1994-03-08

Argenbright, Tony M.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 91461, 92130A, 92131, 464 2, F01L 134, F15B 1702

Patent

active

052918602

ABSTRACT:
The camshaft tends to change in reaction to pulses which it experiences during its normal operation, and it is permitted to change only in a given direction, either to advance or retard, by selectively blocking or permitting the flow of hydraulic fluid, preferably engine oil, through the return lines (194,196) from the recesses (132a, 132b) by controlling the position of a spool (800) within a valve body (798) of a control valve (792) in response to a signal indicative of an engine operating condition from an engine control unit (808). The spool is centered during normal operation when the hydraulic loads acting on its opposed ends by the action of springs (802, 804) that also act on the opposed ends of the spool are in balance. During periods of operation when system pressure is low, a biasing mechanism forces the spool to its full advance position.

REFERENCES:
patent: 4877217 (1989-10-01), Peil et al.
patent: 5002023 (1991-03-01), Butterfield et al.
patent: 5056477 (1991-10-01), Linder et al.
patent: 5107804 (1992-04-01), Becker et al.
patent: 5117784 (1992-06-01), Schechter et al.
patent: 5121717 (1992-06-01), Simko et al.
patent: 5172659 (1992-12-01), Butterfield et al.
patent: 5184587 (1993-02-01), Quinn, Jr. et al.
patent: 5205249 (1993-04-01), Markley et al.
patent: 5207192 (1993-05-01), Smith
patent: 5218935 (1993-06-01), Quinn, Jr. et al.

Affiliated with

Also associated with

Rating

VCT system with control valve bias at low pressures and unbiased does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with VCT system with control valve bias at low pressures and unbiased, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VCT system with control valve bias at low pressures and unbiased will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-148271