US3640258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Governor for internal combustion engines of injection type
Assignee: Bosch Corp
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Filing: 1970-08-03
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Granted: 1972-02-08
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Expires: 1990-08-03
Abstract
Abstract A governor for an internal combustion engine of the injection type. The position of a fuel rod is controlled by the balance of the opposing forces of the spring and a fluid pressure, the latter varying in response to engine speed. The pressure of this fluid is controlled by a control valve operable in one direction to open a bleed port by the force of fluid pressure and thereby increase fuel supply and operable in the opposite direction by the spring force to close the bleed port and thereby decrease fuel supply. Movement of the control valve in the bleed port closing direction is also caused by either a manually operated lever and/or a lever arm, the latter being operated by centrifugal weights in response to engine speed.
Inventors
- 👤 Hiroshi Isobe
- 👤 Hachiro Aoki
- 👤 Noritoshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:06
CPC Classifications
G; G05; G05D; G05D13/00; F; F02; F02D; F02D1/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02D2700/0292
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
360 words
A governor for an internal combustion engine of the injection type comprising: an oil supply means for supplying oil under a pressure which varies with the rotational speed of the engine; a pressure actuated cylinder means for reciprocating a fueladjusting rod of the injection pump in response to pressure of oil supplied by said oil supply means; a first spring means operating on said cylinder means in opposition to the force exerted on the cylinder means by the pressure of said oil from the oil supply means; control valve means communicating with the pressure oil in the cylinder means and including means for controlling the extent of opening of a bleed hole to bleed oil out of said cylinder means, said control valve having a valve piston with an annular recess formed thereon, means for connecting the oil from the cylinder means to the valve piston to increase the opening of said bleeding hole by oil pressure from the cylinder means, and a second spring means operating on said valve piston for decreasing the said bleed opening, whereby a given operating condition of the control valve means is established by the balance of both forces to define the extent of opening of the bleeding hole; lever means for rotating manually a cam for regulating the spring load of said second spring means of the control valve for controlling manually said control valve means; and a centrifugal governor means for operating, in the closing direction, the opening of the bleeding hole of said control valve means to an extent which varies with the rotational speed of the engine, a lever arm, said centrifugal governor means including flyweights rotating in response to rotational speed of the engine and operable to urge the lever arm to move the control valve means in a direction to close the bleeding hole, and a third spring means operating on the lever arm in opposition to the force of the flyweights such that when the flyweights exceed a fixed rotational speed, rotating by centrifugal force, the lever arm is acted on by the force of the said third spring means against the centrifugal force of the flyweights.
Claim 2
Dependent Claim
360 words
A governor for an internal combustion engine of the injection type comprising: an oil supply means for supplying oil under a pressure which varies with the rotational speed of the engine; a pressure actuated cylinder means for reciprocating a fueladjusting rod of the injection pump in response to pressure of oil supplied by said oil supply means; a first spring means operating on said cylinder means in opposition to the force exerted on the cylinder means by the pressure of said oil from the oil supply means; control valve means communicating with the pressure oil in the cylinder means and including means for controlling the extent of opening of a bleed hole to bleed oil out of said cylinder means, said control valve having a valve piston with an annular recess formed thereon, means for connecting the oil from the cylinder means to the valve piston to increase the opening of said bleeding hole by oil pressure from the cylinder means, and a second spring means operating on said valve piston for decreasing the said bleed opening, whereby a given operating condition of the control valve means is established by the balance of both forces to define the extent of opening of the bleeding hole; lever means for rotating manually a cam for regulating the spring load of said second spring means of the control valve for controlling manually said control valve means; and a centrifugal governor means for operating, in the closing direction, the opening of the bleeding hole of said control valve means to an extent which varies with the rotational speed of the engine, a lever arm, said centrifugal governor means including flyweights rotating in response to rotational speed of the engine and operable to urge the lever arm to move the control valve means in a direction to close the bleeding hole, and a third spring means operating on the lever arm in opposition to the force of the flyweights such that when the flyweights exceed a fixed rotational speed, rotating by centrifugal force, the lever arm is acted on by the force of the said third spring means against the centrifugal force of the flyweights.
Claim 3
Dependent Claim
40 words
A governor according to claim 1, wherein the governor is housed in a casing attached to the fuel-injection pump and the oil supply means and the centrifugal governor means are arranged coaxially with a cam shaft of the injection pump.
Claim 4
Dependent Claim
145 words
A governor according to claim 1, said oil supply means being a hydraulic pump rotating coaxially with the camshaft of the fuel-injection pump and varying the feed pressure of the oil in response to the rotational speed of the camshaft; said cylinder means being a chamber hydraulically connected with said hydraulic pump; an end cylinder closing one end of said chamber and being movable in response to oil pressure in said chamber, said cylinder being connected to said fuel-adjusting rod, the axes of the cylinder and the fuel-adjusting rod being substantially parallel to each other, said cylinder arRanged to receive both the force of the first spring means and the opposing force of the oil pressure in the chamber, whereby the cylinder is located axially, together with the fuel-adjusting rod, by the balance of the forces of the oil pressure and the said first spring.
Claim 5
Dependent Claim
141 words
A governor according to claim 3, said control valve means being connected with said chamber through an oil hole, said control valve means including a sleeve with ports communicating to the oil hole, and said valve piston located within the sleeve and axially receiving the spring force of the second spring which is located in the sleeve, said valve piston receiving oil pressure of the said chamber through one of said ports, and in response to which pressure it moves to increase the opening of one of the other ports, said second spring acting in opposition to said oil pressure force to decrease the opening of said ports, the final extent of the opening of said ports being determined by the balance of both the pressure oil force and the force of the second spring to control bleeding from said chamber.
Claim 6
Dependent Claim
51 words
A governor according to claim 4, wherein only when the rotational speed of the flyweights exceeds a fixed value does said centrifugal force overcome the opposite force of said third spring means to operate said lever arm to operate said control valve means to decrease the opening of said bleeding port.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |