Browse Topic: Exhaust reactors

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Development of a Lean Burn/Lean Reactor Engine System Through the Application of Engine Dynamometer Mapping Techniques77030002/01/1977
Various components designed to extend the lean misfire limit and control exhaust emissions of a 4 cylinder engine were evaluated at important CVS speed/load points on an engine dynamometer. The components studied included: modified intake manifold, thermal reactors, exhaust port liners, and a modified combustion chamber. Oxidation studies were conducted to determine the effect of exhaust reactor size on the conversion of HC and CO emissions at lean engine A/F ratios. An experimental technique was developed which permits an assessment of CVS-HOT emissions/fuel economy and driveability characteristics from steady-state engine dynamometer data. The effects of ignition timing and EGR were investigated at lean engine A/F ratios to provide lean burn/lean reactor system calibrations for low emissions potential and maximum fuel economy
Meier, R. C.
Technical Paper
The Effects of TEL on Oxidation in an Exhaust Manifold Reactor - A Single-Cylinder Engine Study71084402/01/1971
In rich-exhaust manifold reactors, complete oxidation of carbon monoxide (CO) and hydrocarbons (HC), generally characterized by luminous conditions and high temperatures, is desirable. Some of the conditions necessary for luminous oxidation in an insulated exhaust reactor have been explored with a single-cylinder engine using both leaded and unleaded isooctane. Threshold-reactor air-injection rates required for luminous oxidation in the reactor were determined for engine air-fuel ratios (A/F) between 11.2 and 14.1. Leaded isooctane produced higher unburned HC concentrations in the exhaust than unleaded isooctane when injection air was introduced as well as when no air was added. In addition, oxidation of CO in the reactor was hindered in the tests with leaded isooctane. During one set of experiments, conditions were such that luminous oxidation in the reactor was achieved with the unleaded fuel, but was not achieved with the leaded fuel. In warmup studies, a longer time was required to
Schwing, Richard C.
Technical Paper
Reduction of Emissions from the Curtiss-Wright Rotating Combustion Engine with an Exhaust Reactor70007402/01/1970
The Curtiss-Wright RC2-60 engine exhaust emissions were measured, with and without an exhaust reactor, under steady-state conditions at the University of Michigan and in a vehicle operated on the simulated California cycle at an independent facility. The reactor successfully reduced the emission levels in both cases. Data are presented for the steady-state trends of engine emissions as a function of engine performance variables; trends are generally similar to those of conventional gasoline engines. The particular effectiveness of an exhaust reactor with the RC engine is attributed to port characteristics and higher exhaust gas temperatures unique to this engine together with new reactor design features. Theoretical considerations and future investigations are discussed
Cole, David E., Jones, Charles
Technical Paper
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