Secondary air injection

About: Secondary air injection is a research topic. Over the lifetime, 11452 publications have been published within this topic receiving 112147 citations.

Aerobic landfill bioreactor

Abstract: The present invention includes a method of decomposing municipal solid waste (MSW) within a landfill by converting the landfill to aerobic degradation in the following manner: (1) injecting air via the landfill leachate collection system (2) injecting air via vertical air injection wells installed within the waste mass; (3) applying leachate to the waste mass using a pressurized drip irrigation system; (4) allowing landfill gases to vent; and (5) adjusting air injection and recirculated leachate to achieve a 40% to 60% moisture level and a temperature between 120° F. and 140° F. in steady state.

Dual flow turbine housing for a turbocharger in a divided manifold exhaust system having E.G.R. flow

Abstract: An internal combustion engine, particularly suitable for a vehicle, is provided with a plurality of combustion cylinders, a first exhaust manifold, a second exhaust manifold and an intake manifold. Each exhaust manifold is coupled with a plurality of the combustion cylinders. An EGR system is disposed in fluid flow communication between the first exhaust manifold and the intake manifold. A turbocharger includes a compressor having an inlet receiving combustion gas and an outlet in fluid flow communication with the intake manifold. A turbine is drivingly coupled to the compressor, and has a turbine casing and a turbine wheel. The turbine casing defines separate first and second inlet paths for exhaust gas flow from the first and second exhaust manifolds. Efficiency and performance are improved by preserving pulse energy in one exhaust manifold flow, and increasing back pressure in the manifold providing EGR flow.

Secondary-air system for an internal-combustion engine

Abstract: Described is a secondary-air system for an internal-combustion engine (32). The system includes at least one line (14) through which air is blown into the exhaust pipe of the engine, a pump (26) and a drive (27) for the pump (26). Also fitted is an air-feed line (13) through which the secondary air is supplied to the pump (26). The power necessary to drive the pump is provided by the engine (32).

Exhaust system for an internal combustion engine, burn-off unit and methods therefor

Abstract: An exhaust system for an internal combustion engine which burns a hydrocarbon fuel mixture and which produces a carbonaceous particle carrying exhaust gas stream that passes through a filter of the system that retains at least part of the particles therein, the system having a burn-off unit for periodically burning the retained particles in the filter to tend to periodically clean the filter of the retained particles thereof The burn-off unit is adapted to raise the temperature of the exhaust gas stream intermediate the engine and the filter to raise the temperature of the filter to particle burning temperature thereof, the burn-off unit injecting and burning a certain amount of the hydrocarbon fuel mixture in the exhaust gas stream intermediate the engine and the filter to raise the temperature of the exhaust gas stream intermediate the engine and the filter The fuel mixture is injected into the exhaust gas stream by an aspirating unit of the burn-off unit, and the temperature of the exhaust gas stream is raised by an electrical heater and a catalyst bed in which the injected fuel mixture is to burn