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Air injection can also be achieved by taking advantage of the negative pressure pulses in the exhaust system at engine idle. A sensitive reed valve assembly called the aspirator valve is placed in the air injection pumping, which draws its air directly from the clean side of the air filter. During engine idle, brief but periodic negative ...
One of the first-developed exhaust emission control systems is secondary air injection. Originally, this system was used to inject air into the engine's exhaust ports to provide oxygen so unburned and partially burned hydrocarbons in the exhaust would finish burning. Air injection is now used to support the catalytic converter's oxidation ...
General Motors began investigating the use of fuel injection on the Turbo-Air engine on 11 August 1962. [35] A mechanical injection system made by the Marvel Schebler division of BorgWarner was installed on a pre-production 164 cu in (2.7 L) engine. The engine received Bill Thomas 4X1 cylinder heads with larger valves; 1.7 in (43 mm) intake and ...
It still had an iron block, two-valve pushrod aluminum heads, and full sequential port fuel injection. The LG8 also featured a new intake manifold and numerous changes to improve parts-sharing with the larger-displacement LA1 3400. Emissions were improved with secondary air injection and it earned LEV status. The engine featured a 89 mm (3.5 in ...
Starting with the 1986 model year, the AMC straight-4 engines used a throttle body injection (TBI) or single-point, fuel injection system with a new fully computerized engine control. [3] In addition to cycling the fuel injector (pulse-width time, on–off), the engine control computer also determined the ignition timing, idle speed, exhaust ...
Digifant is an Engine Management System operated by an Engine Control Unit that actuates outputs, such as fuel injection and ignition systems, using information derived from sensor inputs, such as engine speed, exhaust oxygen and intake air flow. [1] Digifant was designed by Volkswagen Group, in cooperation with Robert Bosch GmbH.
Throttle Body Fuel Injection Systems: 1981: 1993: Formerly a Zenith Radio Factory. AC Rochester: Wichita Falls, Texas: United States: AC Air Filters: 1972: 2008: Transferred to Delphi Automotive Systems in 1999. Closed by Delphi in 2008. ACDelco: Flint, Michigan: United States: AC Spark Plugs: 1912: 1976: Located on Industrial Ave. Production ...
Unpowered" multi-point injection systems without injection-timing controlling such as the Bosch K-Jetronic were commonly used from the mid-1970s until the early 1990s in passenger cars, although examples had existed earlier, such as the Rochester Ramjet offered on high-performance versions of the Chevrolet small-block engine from 1957 to 1965.
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