Clean air systems.Mann + Hummel's secondary air charger CHARGER, Scotch law. He in whose favor a decree suspended is pronounced; vet a decree may be suspended before a charge is given on it. Ersk. Pr. L. Scot. 4, 3, 7. replaces a conventional belt-driven or electric secondary air pump with a unit that is both smaller and lighter. It features a turbocharger-like turbine and compressor wheel on a common shaft that is driven by the difference in air pressure at the throttle body. The compressor wheel introduces fresh air into the exhaust system Noun 1. exhaust system - system consisting of the parts of an engine through which burned gases or steam are discharged exhaust automobile engine - the engine that propels an automobile to improve the oxidation of both hydrocarbon (HC) and carbon monoxide carbon monoxide, chemical compound, CO, a colorless, odorless, tasteless, extremely poisonous gas that is less dense than air under ordinary conditions. It is very slightly soluble in water and burns in air with a characteristic blue flame, producing carbon dioxide; (CO) emissions, and reduces the light-off time of the catalyst. Plastic is used for the turbine and compressor wheels, which have low inertia and mass. This makes the unit more responsive and lighter than conventional designs. In 2007, California and some Northeastern states will severely limit HC emissions once the engine is turned off. The so-called "hot stop" hydrocarbon emissions must not exceed 0.054 g--the equivalent of one drop of fuel--in a well-defined 24-hour test cycle. Since they escape up the intake manifold Noun 1. intake manifold - a manifold consisting of a pipe to carry fuel to each cylinder in an internal-combustion engine fuel system - equipment in a motor vehicle or aircraft that delivers fuel to the engine and into the air filter from the intake and exhaust valve that remain partially open, Mann + Hummel hummel entire, naturally polled deer. created an absorptive hydrocarbon trap that is permanently installed in the vehicle intake system and has a service life of 15 years or 150,000 miles. The HC molecules are released back into the intake air stream when the engine is restarted. [ILLUSTRATION OMITTED] |
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