air injection manifold

The duct inside the cylinder head or the tube outside the cylinder head feeding secondary air into the exhaust ports.

Dictionary of automotive terms. 2015.

Look at other dictionaries:

  • injection manifold — See air injection manifold …   Dictionary of automotive terms

  • air injection — A system that injects fresh air into the exhaust ports or a thermal reactor, for additional conversion of carbon monoxide to carbon dioxide and combustion of unburned hydrocarbons (unburned fuel vapors) found in the exhaust gases as it comes in… …   Dictionary of automotive terms

  • Secondary air injection — Theory and origins= Secondary air injection (commonly air injection, colloquially smog pump, trademark Air Injection Reactor) is an automobile emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream.… …   Wikipedia

  • manifold — [1] A pipe or number of pipes connecting a series of holes or outlets to a common opening. [2] A device which controls refrigerant flow for system test purposes by means of hand valves which can open or close various passageways connected… …   Dictionary of automotive terms

  • Manifold vacuum — Not to be confused with Vacuum manifold. Manifold vacuum, or engine vacuum in an internal combustion engine is the difference in air pressure between the engine s intake manifold and Earth s atmosphere. Manifold vacuum is an effect of a piston s… …   Wikipedia

  • air charge temperature sensor — (ACTS) a thermistor sensor that inputs the temperature of the incoming air stream in the air filter or intake manifold to the computer. It can be located in the intake manifold (EFI systems) or the air cleaner. On carbureted vehicles, if the air… …   Dictionary of automotive terms

  • air gulp system — A system in vehicles with secondary air injection or induction, which prevents an very rich mixture of air fuel from entering the inlet manifold during deceleration. If it did enter, unburned fuel would be forced over the hot exhaust system… …   Dictionary of automotive terms

  • air control valve — (ACV) a vacuum controlled diverter valve (or a combination bypass/diverter valve) in an air injection system that diverts air pump air to either the upstream (exhaust manifold) or downstream (oxidation catalyst) air injection points as necessary …   Dictionary of automotive terms

  • air bypass valve — (ABPV or ABV) a backfire suppressor valve used in air injection systems. During high engine vacuum conditions such as deceleration, it vents pressurized air from the air pump to the atmosphere in order to prevent backfiring. At other times, it… …   Dictionary of automotive terms

  • air switching valve — (ASV) a valve in an air injection system that senses intake manifold vacuum and during heavy loads, dumps part of the air pump output to the air cleaner to reduce air injections system pressure. Also see electric air switching valve …   Dictionary of automotive terms

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