US 4,497,295 AGranted

Minimum-maximum speed governor for fuel-injected engines

AssigneeRobert Bosch GmbH

InventorWerner Bruhmann

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Abstract

The governor includes a force transmission lever subject to the prestressing force of a main governor spring, which lever the governor sleeve comes into operative contact after traversing an idling sleeve path a, and a leaf spring acting as the idling spring. The leaf spring is supported between its two ends on a curved rolloff path, determining its effective spring length, of a support bearing, the operative position of which is adjustable toward the leaf spring in accordance with the pivot angle (.beta.) of an adjusting member by means of an adjusting cam actuable by the adjusting member such as to increase the prestressing force of the leaf spring. The adjusting cam is supported on the force transmission lever in order to prevent influencing the maximum engine speed. With the adjusting member shifted from the idling position toward the full-load position, the corresponding governor characteristic curve is shifted, simultaneously with an increased supply quantity controlled by the governor, toward a higher partial-load engine speed, and by means of the spring rate of the leaf spring which changes as the engine runs up to maximum speed, governor characteristic curves are produced which continuously drop exponentially.

Claims10

Dependent claims

A minimum-maximum speed governor for fuel-injected internal combustion engines, in particular for Diesel vehicle engines, comprising:

a governor lever coupled with a supply quantity adjusting member of an injection pump, said governor lever being actuatable at least indirectly by means of a governor sleeve moved in accordance with engine speed and by means of an adjusting member pivotable in order to vary a fuel supply quantity arbitrarily,
a leaf spring acting as an idling spring, one end of said spring rests on a spring support which is adjustable in order to adjust a prestressing force of the leaf spring and another end of said spring support transmits the force of the leaf spring onto the governor sleeve,
a support bearing placed against the leaf spring, the support bearing being provided with a curved rolloff path determining the effective spring length of the leaf spring, and
an adjusting cam actuatable by the adjusting member, by means of which cam the operative position of the support bearing is variable in accordance with the pivot angle (.beta.) of the adjusting member,
said curved rolloff path of the support bearing being adjustable toward the leaf spring by means of the adjusting cam in accordance with the pivot angle (.beta.) of the adjusting member which is pivotable out of the idling position into a load position, the adjustment of the support bearing being such as to increase a prestressing force of the leaf spring, and that the adjusting cam is supported on a force transmission lever.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/552,199Filed 15 Nov 1983
Priority: DE 324699218 Dec 1982
Granted: 5 Feb 1985
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G05D 13/20
Centrifugal governors with fly-weights: counterbalanced by spider springs acting upon the articulated riser
F02D 1/045
By mechanical means dependent on engine speed, e.g. using centrifugal governors: characterised by arrangement of springs or weights
F02D 1/10
Transmission of control impulse to pump control, e.g. with power drive or power assistance: mechanical
F02D 31/00
Use of speed-sensing governors to control combustion engines, not otherwise provided for