US4038958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection pump governor
Assignee: Bosch Corp
•
Filing: 1975-04-22
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Granted: 1977-08-02
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Expires: 1995-04-22
Abstract
Abstract A flyweight assembly and a manual speed control member are connected through a linkage to a control rod which controls the fuel injection volume of the pump so that the control rod position is determined by both the flyweight assembly and the control member. Idling and main counterforce springs resist movement of the flyweight assembly in their respective engine speed ranges. The control member is arranged to bring a spring mechanism into engagement with the idling counterforce spring when moved beyond a certain point to demand higher engine speed. The spring mechanism acts against the idling counterforce spring to move the control rod to reduce the fuel injection volume when the speed control member is moved from its idling speed position to demand rapid acceleration while the idling counterforce spring remains engaged with the flyweight assembly to prevent excessive fuel injection volume.
Inventors
- 👤 Yasuhide Susuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:34
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/02; F02D1/08; F02D1/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
232 words
In a fuel injection pump governor having a fuel injection control member, an engine speed control member movable from a minimum engine speed position in a direction to increase engine speed, an engine driven flyweight assembly, a linkage connecting the flyweight assembly to the fuel injection control member so that movement of the flyweight assembly causes movement of the fuel injection control member, the linkage further connecting the speed control member to the fuel injection control member so that movement of the speed control member causes movement of the fuel injection control member and an idling counterforce spring to resist movement of the flyweight assembly when the engine speed is below a predetermined value, the improvement comprising: a spring assembly engagable with the idling counterforce spring to apply a force thereto in a direction opposite to the force of the idling counterforce spring; the speed control member being engagable with the assembly to cause the spring assembly to be disengaged from the idling counterforce spring when the speed control member is between the minimum engine speed position and a predetermined position spaced from the minimum engine speed position in the direction to increase engine speed and cause the spring assembly to engage with the idling counterforce spring when the speed control member is spaced farther from the minimum engine speed position than the predetermined position in the direction to increase engine speed.
Claim 2
Dependent Claim
232 words
In a fuel injection pump governor having a fuel injection control member, an engine speed control member movable from a minimum engine speed position in a direction to increase engine speed, an engine driven flyweight assembly, a linkage connecting the flyweight assembly to the fuel injection control member so that movement of the flyweight assembly causes movement of the fuel injection control member, the linkage further connecting the speed control member to the fuel injection control member so that movement of the speed control member causes movement of the fuel injection control member and an idling counterforce spring to resist movement of the flyweight assembly when the engine speed is below a predetermined value, the improvement comprising: a spring assembly engagable with the idling counterforce spring to apply a force thereto in a direction opposite to the force of the idling counterforce spring; the speed control member being engagable with the assembly to cause the spring assembly to be disengaged from the idling counterforce spring when the speed control member is between the minimum engine speed position and a predetermined position spaced from the minimum engine speed position in the direction to increase engine speed and cause the spring assembly to engage with the idling counterforce spring when the speed control member is spaced farther from the minimum engine speed position than the predetermined position in the direction to increase engine speed.
Claim 3
Dependent Claim
123 words
The governor of claim 1, in which the spring assembly comprises: a first spring; a first lever connected to the first spring so that the first spring urges the first lever to engage with the idling counterforce spring to transmit the force of the first spring thereto; and means engagable with the first lever to normally hold the first lever out of engagement with the idling counterforce spring, the speed control member engaging with said means when the speed control member is spaced farther from the minimum engine speed position than the predetermined position in the direction to increase the engine speed to cause said means to release the first lever to allow the first lever to engage with the idling counterforce spring.
Claim 4
Dependent Claim
122 words
The governor of claim 2, in which said means comprises: a second lever engagable with the first lever; and a second spring connected to the second lever to urge the second lever to engage with the first lever to move the first lever out of engagement with the idling counterforce spring against the force of the first spring, the speed control member engaging with the second lever when the speed control member is spaced farther from the minimum engine speed position than the predetermined position in the direction to increase the engine speed to move the second lever against the force of the second spring to allow the first spring to move the first lever to engage with the idling counterforce spring.
Claim 5
Dependent Claim
19 words
The governor of claim 3, in which the first and second levers are pivotal about a common fixed point.
Claim 6
Dependent Claim
77 words
The governor of claim 1, in which the linkage includes a first lever pivotal at one end about a fixed point and pivotally connected at the other end to the flyweight assembly, a second lever pivotally connected at an intermediate point thereof to an intermediate point of the first lever, the second lever being pivotally connected at one end to the fuel injection volume control member and connected at the other end to the speed control member.
Claim 7
Dependent Claim
66 words
The governor of claim 3, further comprising a third lever pivotal at one end about a fixed point, a stop and a main counterforce spring urging the third lever against the stop, the flyweight assembly engaging with the third lever to urge the third lever away from the stop against the force of the main counterforce spring when the engine speed is above the predetermined value.
Claim 8
Dependent Claim
30 words
The governor of claim 6, in which the first spring is connected between the first and third levers and the second spring is connected between the second and third levers.
Claim 9
Dependent Claim
22 words
The governor of claim 7, in which the first spring is a compression spring and the second spring is an extension spring.
Claim 10
Dependent Claim
21 words
The governor of claim 6, in which the idling counterforce spring is connected between the flyweight assembly and the third lever.
Claim 11
Dependent Claim
15 words
The governor of claim 9, in which the idling counterforce spring is a compression spring.
References Cited (Backward Citations)
US3530845A
Cited
US3577968A
Cited
US3672343A
Cited
US3759236A
Cited
US3884206A
Cited
US3903860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |