Optoelectric measuring device for monitoring combustion processes
First Claim
1. Optoelectronic measuring device for monitoring combustion processes in a combustion chamber of an internal combustion engine during operation, with optical sensors being assigned to said combustion chamber each defining a point of entrance, which optical sensors are connected to an evaluation unit, each of said sensors being provided with a lens assembly at said point of entrance into said combustion chamber, which lens assembly is in optical contact with at least one optical fiber and includes a plano-convex lens as focusing lens, and an end of at least one optical fiber being positioned in a focal plane of said focusing lens, wherein said focal plane of said focusing lens coincides with a plane face of said plano-convex lens, and said end of said at least one optical fiber is in direct contact with said plane face.
1 Assignment
0 Petitions
Accused Products
Abstract
An optoelectronic measuring device for monitoring combustion processes in a combustion chamber of an internal combustion engine during operation is provided with optical sensors which are connected to an evaluation unit. The optical sensors may be located in a seal element bounding the combustion chamber. To obtain high measuring quality in a simple manner, the optical sensors each include a lens assembly having a focusing lens whose flat end opposite the combustion chamber is coincident with the focal plane of the focusing lens and is abutted by an end of at least one optical fiber.
-
Citations
17 Claims
- 1. Optoelectronic measuring device for monitoring combustion processes in a combustion chamber of an internal combustion engine during operation, with optical sensors being assigned to said combustion chamber each defining a point of entrance, which optical sensors are connected to an evaluation unit, each of said sensors being provided with a lens assembly at said point of entrance into said combustion chamber, which lens assembly is in optical contact with at least one optical fiber and includes a plano-convex lens as focusing lens, and an end of at least one optical fiber being positioned in a focal plane of said focusing lens, wherein said focal plane of said focusing lens coincides with a plane face of said plano-convex lens, and said end of said at least one optical fiber is in direct contact with said plane face.
-
17. A combination of an internal combustion engine defining a combustion chamber and an optoelectric measuring device for monitoring combustion processes within said combustion chamber, said optoelectric measuring device comprising:
-
an evaluation unit, a lens assembly positioned at an entrance to said combustion chamber, said lens assembly including a cylindrical plano-convex lens which defines a convex end facing said combustion chamber so as to directly view an interior of said combustion chamber and an opposite flat end, said flat end coinciding with a focal plane of said lens, and an optical fiber which extends between said lens and said evaluation unit and includes an end in direct contact with said flat end of said plano-convex lens.
-
Specification