Intake valve fairing for a cylinder head of an engine
AssigneeFord Global Technologies, LLC
InventorsJohn Christopher RIEGGER, Jeffrey D. FLUHARTY, Philip Damian CIERPIAL, Abhijyoth VEMPATI
Life of this patent
Estimating the term…
Abstract
An engine has a cylinder head defining an intake port with a roof defining first and second valve guide bores upstream of first and second siamesed intake valve seats for a cylinder. The head has first and second asymmetric fairings extending outwardly from the roof and positioned directly upstream of respective bores. Each fairing has an inner wall intersecting an outer wall along an upstream edge and an inclined planar roof wall extending between the inner and outer walls. A method of forming the cylinder head and engine is also provided by milling the fairings from a roof preform formed with the intake port of the head.
Claims20
An engine comprising:
- a head defining an intake port with a roof defining first and second valve guide bores upstream of first and second siamesed intake valve seats for a cylinder;
- first and second fairings extending outwardly from the roof and positioned directly upstream of respective bores, each fairing having an inner wall intersecting an outer wall along an upstream edge and an inclined planar roof wall extending between the inner and outer walls.
A cylinder head comprising:
- a member defining an intake port extending from an intake manifold mounting flange to first and second intake siamesed intake valve ports separated by a valve bridge, a roof of the intake port defining first and second v-shaped fairings upstream of and directly adjacent to first and second valve guide bores;
- wherein each fairing has a planar inner wall and a planar outer wall extending outwardly from the adjacent roof surface, the inner and outer walls intersecting along an upstream edge of the fairing, a length of the outer wall being greater than a length of the inner wall for each fairing, the inner walls of the first and second fairings facing one another;
- wherein each fairing has a downstream guide wall extending outwardly from the adjacent roof surface and extending between the inner and outer side walls, the guide wall shaped to be concentric with the associated bore;
- wherein each fairing has a planar roof wall extending between the inner and outer side walls and the guide wall, the roof wall inclined towards the upstream edge and inclined towards the inner wall;
- and
- wherein each fairing is asymmetric.
A method of forming an engine comprising:
- forming an intake port in a cylinder head with a roof preform, the intake port extending from an intake manifold mounting flange to first and second intake valve seats for a cylinder;
- milling the roof preform to form first and second asymmetric valve guide fairings extending outwardly from a surrounding roof of the intake port, each fairing having inner and outer side walls intersecting along an upstream edge and intersecting a downstream concave guide wall, each fairing having a roof wall extending between the inner and outer side walls and the guide wall, a length of each outer side wall being greater than a length of each associated inner side wall;
- and
- machining first and second valve guide bores into the roof of the intake port directly downstream of and concentric with respective guide walls of the first and second fairings.
Dependencies are inferred from the claim text.