Engine manifold

Engine manifold

An arrangement or collection of pipes or tubing with several inlet or outlet passages through which a gas or liquid is gathered or distributed. The manifold may be a casting or fabricated of relatively light material. Manifolds are usually identified by the service provided, such as the intake manifold and exhaust manifold on the internal combustion engine. Some types of manifolds for handling oil, water, and other fluids such as engine exhaust gas are often called headers. In the internal combustion engine, the intake and exhaust manifolds are an integral part of multicylinder engine construction and essential to its operation. See Internal combustion engine

The engine intake manifold is a casting or assembly of passages through which air or an air-fuel mixture flows from the air-intake or throttle valves to the intake valve ports in the cylinder head or cylinder block. In a spark-ignition engine with a carburetor or throttle-body fuel injection, the intake manifold carries an air-fuel mixture. In an engine with port fuel injection or in a diesel engine, the intake manifold carries only air. For the diesel engine, the air should be inducted with a minimum of pressure drop. The purpose of the intake manifold is to distribute the air or air‐fuel mixture uniformly to each of the cylinders and to assist in the vaporization of the fuel.

The engine exhaust manifold is a casting or assembly of passages through which the products of combustion leave the exhaust-valve ports in the cylinder head or cylinder block and enter the exhaust piping system. The purpose of the exhaust manifold is to collect and carry these exhaust gases away from the cylinders with a minimum of back pressure.

Some automative spark-ignition engines have an air-distribution manifold as part of the exhaust-emission control system. This manifold distributes and proportions air to the individual exhaust ports through external tubing or integral passageways.

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The automotive exhaust systems comprise five components: engine manifold, engine down pipe, catalytic convertor, muffler, and tail pipe.
The laser was triggered from more than a mile away and burned a hole through the bonnet and engine manifold in seconds.
Known as ATHENA, for Advanced Test High Energy Asset, the ground-based prototype system burned through the engine manifold in a matter of seconds from more than a mile away.
Others change the entire exhaust unit, right from the engine manifold to the end pipe.
The pressure balancing electronic controller drives suitably the butterfly valve with the help of a motor that brings the valve for a null pressure differential across the manifolds for the fuel and air attached upstream to the main engine manifold and works in suction pressures.
These engines would incorporate a device similar to a car's catalytic converter that would be part of the engine manifold.
McRae retired from the Rally of Portugal when when he holed his Ford Focus' engine manifold, stranding the car on stage eight.
These were strong factors in Briggs & Stratton's choice of Akulon for the engine manifold.
Siemens is currently carrying out engine manifold tuning studies with respect to engine performance and induction noise.
Altech-Eco's EPA approved F-Series conversion technology is certified without drilling into the engine manifold, something most competitors do with varying degrees of success, which is a procedure frowned upon by manufacturers.
Altech-Eco's EPA approved CNG technology is Certified without drilling into the engine manifold, something most competitors do with varying degrees of success, which is a procedure frowned upon by manufacturers.
In its prototype stage earlier this year, CMLogic was used by several industrial companies to predict the molding process setups for a variety of plastic parts including a new cellular phone housing unit, an automotive engine manifold, and an automotive instrument panel bezel, according to Mike Obermier, a Cray Research polymer processing specialist and head of the CMLogic development team.

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