US3576105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine governor having lagged rate feedback
Assignee: Bendix Corp
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Filing: 1969-09-22
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Granted: 1971-04-27
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Expires: 1989-09-22
Abstract
Abstract A combustion engine governor including a fluid servo operated differential area piston having one face vented to a controlled pressurized servo fluid and a second face of relatively smaller area vented to a regulated pressure fluid source via a fluid restriction. A servo valve responsive to a speed error input signal controls the pressure of the servo fluid and is further responsive to a fluid pressure differential generated across the fluid restriction which varies as a function of the rate of displacement of the piston. Variable volume chambers separated by a resiliently loaded fluid pressure responsive movable wall have fluid connections to opposite sides of the fluid restriction and the movable wall responds to pressure actuations thereacross to effect a predetermined lag in the pressure differential generated across the fluid restriction.
Inventors
- 👤 Joseph L Peczkowski
- 👤 Mike Snider
- 👤 Francis G Sollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:52
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32; F02C9/263; F02D; F02D1/00; F02D1/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
274 words
A combustion engine fuel meter responsive to actual engine speed and request engine speed input signals including governor means having a lagged rate feedbacK control circuit comprising: a source of pressurized fuel; a fuel conduit connected to supply pressurized fuel from said source to the engine; valve means operatively connected to said fuel conduit for controlling fuel flow therethrough to the engine; fluid pressure responsive means responsive to a regulated substantially constant pressure fluid and a controlled variable pressure fluid operatively connected to said valve means for actuating the same; servovalve means operatively connected to control said variable pressure fluid to which said valve means responds; lever means operatively connected to said servovalve means for actuating the same; a restriction in flow controlling relationship with said substantially constant pressure fluid for generating a fluid pressure differential which varies as a function of the rate of change of position of said fluid pressure responsive means; variable volume chamber means including a spring loaded movable wall responsive to said fluid pressure differential and adapted to delay said pressure differential across said restriction; first force producing means responsive to actual and request engine speed input signals operatively connected to said lever means for imposing a force thereon which varies depending upon the relative error between said speed signals; second force producing means responsive to said pressure differential generated across said restriction and operatively connected to said lever means in force opposing relationship to said first force producing means to thereby establish a resultant force on said lever means which varies as a lagged function of the rate of change of position of said fluid pressure responsive means.
Claim 2
Dependent Claim
274 words
A combustion engine fuel meter responsive to actual engine speed and request engine speed input signals including governor means having a lagged rate feedbacK control circuit comprising: a source of pressurized fuel; a fuel conduit connected to supply pressurized fuel from said source to the engine; valve means operatively connected to said fuel conduit for controlling fuel flow therethrough to the engine; fluid pressure responsive means responsive to a regulated substantially constant pressure fluid and a controlled variable pressure fluid operatively connected to said valve means for actuating the same; servovalve means operatively connected to control said variable pressure fluid to which said valve means responds; lever means operatively connected to said servovalve means for actuating the same; a restriction in flow controlling relationship with said substantially constant pressure fluid for generating a fluid pressure differential which varies as a function of the rate of change of position of said fluid pressure responsive means; variable volume chamber means including a spring loaded movable wall responsive to said fluid pressure differential and adapted to delay said pressure differential across said restriction; first force producing means responsive to actual and request engine speed input signals operatively connected to said lever means for imposing a force thereon which varies depending upon the relative error between said speed signals; second force producing means responsive to said pressure differential generated across said restriction and operatively connected to said lever means in force opposing relationship to said first force producing means to thereby establish a resultant force on said lever means which varies as a lagged function of the rate of change of position of said fluid pressure responsive means.
Claim 3
Dependent Claim
107 words
A combustion engine fuel meter as claimed in claim 1 wherein: said fluid pressure responsive means includes a differential area member having a first area exposed to said substantially constant fluid pressure and a second relatively larger area exposed to said variable pressure fluid controlled by said servovalve means; said variable volume chamber means including first and second variable volume chambers separated by said movable wall and vented to opposite sides of said restriction; first and second spring members operatively connected to said movable wall in force opposing relationship for urging said movable wall to a balanced position in the absence of a fluid pressure differential thereacross.
Claim 4
Dependent Claim
195 words
A combustion engine fuel control as claimed in claim 1, wherein: said first force producing means includes a bracket having spaced apart end portions and provided with first and second resilient fluid pressure responsive members operatively connecting said spaced apart ends to a fixed support thereby adapting said bracket for movement relative to said support; first passage means connecting said first resilient fluid pressure responsive means to said restriction on one side thereof; second passage means connecting said second resilient fluid pressure responsive means to said restriction on the opposite side thereof; a governor spring interposed between one end of said bracket and a movable spring retaining member; a first movable cam for generating a position signal representing said request engine speed signal; a second movable cam for generating a position signal representing said actual engine speed signal; actuating means responsive to engine speed operatively connected to said second cam force for actuating the same; and follower means operatively connected to said first and second cams and said movable spring retaining member for varying the effective force load imposed by said governor spring on said bracket in response to said request and actual engine speeds.
Claim 5
Dependent Claim
146 words
A combustion engine fuel meter as claimed in claim 1 and further including: cam means responsive to actual engine speed; follower means positioned by said cam means; a position feedback member operatively connected To said valve means and movable therewith; second lever means pivotally secured to said position feedback member and engageable with said first named lever means; resilient force producing means operatively connected to said second lever means for loading the same and thus said first named lever means in opposition to said first force producing means; first stop means operatively connected to said follower means and actuated thereby into engagement with said second lever means to position the same against the resistance of said resilient force producing means thereby causing said first named lever means to move accordingly and establish a corresponding engine acceleration fuel flow which varies as a function of engine speed.
Claim 6
Dependent Claim
75 words
A combustion engine fuel meter as claimed in claim 4 and further including: second stop means operatively connected to said follower means and actuated thereby into engagement with second lever means to position the same and thus said first-named lever means engageable therewith against the resistance of said first force producing means to establish a corresponding deceleration engine fuel flow which is a predetermined percentage of the acceleration fuel flow for any given engine speed.
Claim 7
Dependent Claim
77 words
A combustion engine fuel meter as claimed in claim 5 and further including; a fixed abutment engageable with said second stop means for limiting the movement thereof to establish a predetermined minimum fuel flow during an engine deceleration; and said operative connection between said second stop means and said follower means includes a one-way collapsible member adapted to collapse to permit movement of said follower means upon engagement of said second stop means with said fixed abutment.
Claim 8
Dependent Claim
78 words
A combustion engine fuel meter as claimed in claim 1 wherein: said fuel meter includes a casing vented interiorly to a drain fuel source; said force producing means is exposed to said fuel within said casing and includes a governor spring and temperature responsive means responsive to the temperature of the fuel within said casing; said temperature responsive means being operatively connected to said governor spring and adapted to compensate for variations in temperature of said governor spring.
Claim 9
Dependent Claim
50 words
A combustion engine fuel meter as claimed in claim 3 wherein: said first movable cam is a rotatable and axially movable cam; said first movable cam being rotated as a function of engine speed and actuated axially in response to actuating mechanism responsive to a variable condition of engine operation.
Claim 10
Dependent Claim
64 words
A combustion engine fuel meter as claimed in claim 8 wherein: said first movable cam is provided with first and second independent contoured surfaces one of which is engaged by said follower means; and said actuating means includes follower means engageable with said second contoured surface for actuating said second movable cam in response to axial and rotary motion of said first movable cam.
Claim 11
Dependent Claim
53 words
A combustion engine fuel meter as claimed in claim 9 wherein; said second movable cam is a rotatable and axially movable cam adapted to be actuated axially by said actuating means; and means responsive to a second variable condition of engine operation operatively connected to said second movable cam for rotating the same.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |