Preloaded compliant linkage for fuel injection pump rack
This patent describes in a fuel injection pump system for an internal combustion engine. The improvement comprising: a compliant linkage in the pump rack means positioned between a first portion of the pump rack means engaged by the gear and a second portion thereof which is connected to the plunger means. The linkage comprising a precompressed spring urging the first and second portions of the pump rack means apart from each other with a force greater than the value of load forces acting on the rack means during normal operation in the absence of abnormally strong transient load forces, but less than the driving force produced by the stepper output shaft; whereby the spring remains in its normal precompressed state during normal operation; is additionally compressed when transient load forces occur so as to permit continue normal operation of the gear even though the second portion of the rack means is arrested; and returns to its normal precompressed state when the transient local forces disappear, thus permitting the second portion of the pump rack means to assume its proper controlled position. Herein the first portion of the rack means is pivotable about an axis normal to the length of the pump rack means and is biased toward the gear by a spring.
- Assignee:
- AIL Corp., Columbia, SC
- Patent Number(s):
- US 4850321
- Application Number:
- PPN: US 7110602A
- OSTI ID:
- 5444383
- Resource Relation:
- Patent File Date: 16 Oct 1987
- Country of Publication:
- United States
- Language:
- English
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