Injection pump throttle dashpot for transient smoke control
AssigneeDeere & Company
InventorsLawrence P. Tracy, Richard G. Norton
Life of this patent
Estimating the term…
Abstract
The present invention provides a very simple structure to delay high fuel delivery to a turbocharged engine until a sufficient turbocharger boost pressure is available for adequate combustion, by providing a simple dashpot to limit movement of the throttle shaft. A brea-away throttle lever is used so that the operator can position the control lever at any position, even though the position of the throttle shaft itself is being limited by the dashpot. Preferably, the damping structure is entirely housed within the fuel injector pump, where it will be safe from debris, and constantly flushed with clean fuel.
Claims11
A damper for a fuel injection pump, the injection pump having:
- a. a mounting structure;
- b. a throttle shaft rotatably mounted to said mounting structure;
- c. adjustable fuel pressurization means controlled by said throttle shaft for providing different fuel output volumes depending on the rotational position of said throttle shaft;
- and
- d. a throttle control lever pivotally mounted to said throttle shaft to be pivotal between first and second positions relative to said shaft and for controlling the rotation of said throttle shaft;
- the damper comprising:
- e. a cam mounted to said throttle shaft for rotation therewith;
- f. a dashpot mounted to said mounting structure and selectively abutting against said cam to dampen motion of said cam and said throttle shaft in at least one direction.
A damped fuel injection pump, comprising:
- a. a housing;
- b. a throttle shaft rotatably mounted to said housing and extending both inside and outside of said housing;
- c. a break-away throttle control lever mounted to said throttle shaft on the outside of said housing for controlling the rotation of said throttle shaft;
- d. adjustable fuel pressurization means inside said housing controlled by said throttle shaft for providing different fuel output volumes depending on the rotational position of said throttle shaft;
- e. a cam mounted to said throttle shaft inside said housing for rotation with said throttle shaft;
- f. a dashpot mounted to said mounting structure inside said housing and selectively pressing against said cam to dampen motion of said cam and said throttle shaft in at least one direction.
Dependencies are inferred from the claim text.