US4583506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled type governor for diesel engines
Assignee: Bosch Corp
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Filing: 1985-04-03
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Granted: 1986-04-22
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Expires: 2005-04-03
Abstract
Abstract In an electronically controlled governor having an electronic actuator for positioning a fuel adjusting member, a warming-up current is supplied to reduce the operational resistance of the electric actuator when an auxiliary device for the starting of the diesel engine is executed, whereby the resistance due to the viscosity of the oil in the actuator is reduced by the temperature rise of the actuator caused by the warming-up current.
Inventors
- 👤 Kenji Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:22
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D1/00; F02D1/02; F02D1/08; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/064; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
An electronically controlled type governor for diesel engines, said governor comprising: an electric actuator for adjusting the position of a fuel adjusting member of a fuel injection pump; means for producing a preheating signal indicating the execution of a preheating operation by an auxiliary device for the starting of the diesel engine; means responsive to at least one condition signal for producing a first target signal indicating the position of said fuel adjusting member necessary for obtaining the optimum amount of fuel injection; means for producing a second target signal for the warming-up operation of said electric actuator; a selecting means responsive to the preheating signal for selecting either said first or second target signal, said second target signal being selected when said preheating operation is carried out by said auxiliary device and said first target signal being selected when the preheating operation has been terminated; and an output means responsive to the output from said selecting means for producing a driving signal for said electric actuator.
Claim 2
Dependent Claim
167 words
An electronically controlled type governor for diesel engines, said governor comprising: an electric actuator for adjusting the position of a fuel adjusting member of a fuel injection pump; means for producing a preheating signal indicating the execution of a preheating operation by an auxiliary device for the starting of the diesel engine; means responsive to at least one condition signal for producing a first target signal indicating the position of said fuel adjusting member necessary for obtaining the optimum amount of fuel injection; means for producing a second target signal for the warming-up operation of said electric actuator; a selecting means responsive to the preheating signal for selecting either said first or second target signal, said second target signal being selected when said preheating operation is carried out by said auxiliary device and said first target signal being selected when the preheating operation has been terminated; and an output means responsive to the output from said selecting means for producing a driving signal for said electric actuator.
Claim 3
Dependent Claim
63 words
A governor as claimed in claim 1 wherein said output means has means for producing a position signal indicating the position of said fuel adjusting member at each instant, and a servo means responsive to the output from said selecting means and said position signal for positioning said fuel adjusting member at the position designated by the signal selected by said selecting means.
Claim 4
Dependent Claim
46 words
A governor as claimed in claim 2 wherein said electric actuator is driven by the driving signal so as to maintain the position of said fuel adjusting member at a predetermined fixed position during the preheating operation, whereby said actuator is warmed by the driving signal.
Claim 5
Dependent Claim
74 words
A governor as claimed in claim 1 wherein said means for producing the second target signal has means for producing a first signal indicating the base position of said fuel adjusting member, means for producing a second signal whose level periodically varies, and means for superposing the second signal on the first signal to produce said second target signal, whereby said fuel adjusting member is vibrated at the position indicated by said first signal.
Claim 6
Dependent Claim
15 words
A governor as claimed in claim 4 wherein the second signal is a sinusoidal signal.
Claim 7
Dependent Claim
59 words
A governor as claimed in claim 4 wherein the levels of said first and said second signals are set in such a way that the level of the second target signal obtained by superposing said second signal on said first signal does not exceed the level representing the maximum position of said fuel adjusting member in normal control operation.
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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |