Back to results
US 8,985,077 B2Granted
Valvetrain impact absorber
AssigneeFord Global Technologies, LLC
InventorsJim Chern, Chong Hsi Jack Chen, Minghui Chien, Scott Michael DeRaad
Life of this patent
Estimating the term…
Abstract
Embodiments may provide a valve train for an engine including a valve stem configured for reciprocating movement to open and close a port in a combustion chamber of the engine. The valve train may also include an elastomeric element coupled with the valve stem, and a mass may be coupled with the elastomeric element and able to move relative to the valve stem.
Claims17
A valve train comprising:
- a valve stem of a valve movable to open and close a port to an engine combustion chamber;
- a spring holding the port biased toward a closed position;
- and
- a mass coupled with the valve stem via a resilient member, located within the spring, the mass having a top end below a top end of the spring and a bottom end above a bottom end of the spring.
1 more element
A valve train for an engine comprising:
- a valve stem configured for reciprocating movement to open and close a port in a combustion chamber of the engine;
- a spring holding the port biased toward a closed position;
- an elastomeric element coupled with the valve stem and located within the spring;
- and
- a mass coupled with the elastomeric element and able to move relative to the valve stem;
- and
- a valve retainer fixed to the valve stem, wherein the elastomeric element is an annular ring encircling at least a portion of the valve retainer, and wherein the mass is an annular ring encircling at least a portion of the elastomeric element.
4 more elements
A valve retainer comprising:
- a flange adjacent to and supporting a spring;
- a non-coupling surface;
- a coupling surface located within the spring and parallel to the non-coupling surface;
- a first annular body portion extending from the flange and having a first diameter, and a second annular body portion extending from the first annular body portion, the second annular body portion having a second diameter smaller than the first diameter, the coupling surface being an outer annular surface of the second annular body portion, the non-coupling surface being an outer annular surface of the first annular body portion;
- an elastomeric element fixed to the coupling surface;
- and
- a mass over the elastomeric element, the elastomeric element offset from the non-coupling surface such that there is an annular gap between the non-coupling surface and the mass, the elastomeric element being an elastomeric ring around the coupling surface, the mass being an annular ring at least partially compressing an elastomeric ring over the coupling surface.
4 more elements
Dependencies are inferred from the claim text.