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.

Air flotation dryer with built-in afterburner

Abstract: An internal exhaust fan (56) propels internal solvent-laden air across a burner (66) where it combusts, causing a heat rise. Heated, combusted air is routed to a recirculating supply air fan (50) which provides for pressurized heated air for air bars (28a-28n, 30a-30n) for drying a web. Heated air in excess of that required to dry the web is vented externally and helps to maintain desired solvent concentration levels. Variable parameters such as fan speed, burner temperatures, air box pressures, exhaust air rate, solvent concentration, supply air flow, supply air temperature and damper vane position are monitored, and the components are actuated to effect a high level of clean up efficiency.

Device for recirculating an exhaust gas stream to the intake conduit of an engine

Abstract: A valve device (20) is formed as an independent component part and is fitted directly to the exhaust gas cooler (15) in the area of the inlet (16) and the outlet (17) or is incorporated with the exhaust gas cooler as a structural unit. The valve device has an input feed connection (21) and an outflow connection for the exhaust gas. The exhaust gas cooler with its inlet and outlet is connected to a by-pass path (23), which runs parallel to the feedback path (13) and bridges over it. The input feed connection of the valve device is connected to the inlet of the exhaust gas cooler.

Vehicle exhaust heat recovery with multiple coolant heating modes and method of managing exhaust heat recovery

Abstract: An apparatus is provided for a vehicle with an engine that includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned at least partially within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first mode to direct the exhaust gas across the heat exchanger along a first flow path to transfer exhaust heat to the coolant flow passages, and is further operable in a second mode to direct at least a portion of the exhaust gas across the heat exchanger along a second flow path to transfer exhaust heat to the coolant flow passages in a second coolant heating mode. The second flow path is restricted relative to the first flow path. A method of managing exhaust heat recovery is also provided.

Study of the effects on exhaust emissions in direct injection diesel engines : Effects of fuel injection system, distillation properties and cetane number

Abstract: The effect of injection nozzle, diesel fuel density (volatility) and cetane number on diesel exhaust emissions were investigated. Decreasing injection nozzle hole diameter decreases PM emission. However, a small nozzle hole increases NOx emission and decreases the effect of fuel on PM emission. Decreasing fuel density is effective for reduction of NOx emission. But the effect is smaller than that of nozzle hole diameter and injection pressure. Furthermore injection timing retardation decreases the effect of fuel density on NOx emission.

Apparatus for treating floor coverings

Abstract: Apparatus for cleaning carpets is provided. The apparatus includes a nozzle for applying liquid such as water to the carpet and also includes air nozzles or openings for drying the carpet. Specifically, a vacuum nozzle is employed to pull in air and water from the carpet, with a hose connecting the vacuum nozzle to a vacuum tank which is associated with a vacuum blower. An exhaust air nozzle or opening is positioned near the vacuum nozzle, with a hose connecting this nozzle to an exhaust outlet associated with the vacuum blower. The vacuum nozzle and the exhaust air nozzle or opening are positioned so that warm exhaust air from the vacuum blower is emitted from the exhaust air nozzle or opening, passes at least partly through the carpet, and is at least partly returned with water through the vacuum nozzle to the tank. In one form, the exhaust air nozzle or opening can be opened and closed remotely through suitable linkages. The liquid nozzle is located in a plenum chamber associated with the exhaust air nozzle or opening and is directed toward the carpet through an exhaust air opening in the chamber. A valve controls flow of liquid to the liquid nozzle and in one form this valve is controlled by the same linkages that control the position of the exhaust air nozzle. When the exhaust air nozzle is closed, the valve is opened to supply liquid to the liquid nozzle with the exahust air in the plenum chamber then passing through the exahust air opening around the liquid nozzle and breaking up the liquid emanating therefrom into a spray. A rotatable brush can also be located below the liquid nozzle to receive liquid therefrom and also to receive the exhaust air which can help to cause rotation of the brush. The liquid for the nozzle can be supplied by gravity from a tank thereabove. The liquid tank can also be located remotely at the vacuum unit with the liquid supplied to the nozzle by means of the pressure of the exhaust air. In a simplified form, the exhaust air nozzle can be eliminated with the exhaust air passing through the exhaust air opening around the liquid nozzle at all times.This application is a continuation-in-part of my copending application Ser. No. 465,233, filed on Apr. 29, 1974, and now abandoned.