Exhaust manifold for internal combustion engines
US6230490A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 3, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Nov 3, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N13/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust manifold is constructed of material varying in thickness. Auxiliary cooling, such as from an air flow, to a portion of the exhaust manifold, permits making this portion thinner than a portion shielded from the auxiliary cooling. This lowers the heat capacity of the thinner material, allowing the exhaust manifold to heat rapidly to the activation temperature of a catalyst. Thus, the catalyst is capable of removing harmful elements from the exhaust gases of an internal combustion engine more quickly, thereby reducing pollution to the atmosphere. Furthermore, an exhaust manifold having this structure is lighter and requires less material than conventional exhaust manifolds, thereby making production easier and less costly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.