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Quadrajet carburetors have mechanical secondary throttle plates operated by a progressive linkage; the primaries open before the secondaries, and use on-demand air valve plates above the secondary throttle plates. The air valves are connected by a cam and linkage to the secondary fuel metering rods.
4300A 441 CFM specs: [2] 1" primary venturi; Primary throttle bore: 1-7/16" Secondary throttle bore: 1-9/16" The 4300A was found to run too lean for the 390 CID engines, resulting in the development of the 600 CFM 4300A in 1968. [3] The 441 CFM 4300A was discontinued after the 1969 model year in favor of the two-barrel Autolite 2100 carburetor. [3]
CFM is the world's largest commercial aircraft engine manufacturer, with a 39% market share as of 2020. [1] It has delivered more than 37,500 of its engines to more than 570 operators. The name CFM is derived from the two parent companies' commercial engine designations: GE's CF series and Snecma's M series.
Therefore, an accelerator pump is often used to briefly provide extra fuel as the throttle is opened. [12] When the driver presses the throttle pedal, a small piston or diaphragm pump injects extra fuel directly into the carburetor throat. [13] The accelerator pump can also be used to "prime" an engine with extra fuel prior to attempting a cold ...
Modern direct injection diesel engines combine stratified charge (SC) with compression ignition (CI), abbreviated as SCCI. As in HCSI, HCCI injects fuel during the intake stroke. However, rather than using an electric discharge (spark) to ignite a portion of the mixture, HCCI raises density and temperature by compression until the entire ...
The LEAP [13] incorporates technologies that CFM developed as part of the LEAP56 technology acquisition program, which CFM launched in 2005. [14] The engine was officially launched as LEAP-X on 13 July 2008. [9] It is intended to be a successor to the CFM56. In 2009, COMAC selected the LEAP engine for the C919. [15]
Research into the next generation of commercial jet engines, high-bypass ratio turbofans in the "10-ton" (20,000 lbf; 89 kN) thrust class, began in the late 1960s. Snecma (now Safran), who had mostly built military engines previously, was the first company to seek entrance into the market by searching for a partner with commercial experience to design and build an engine in this class.
In fuel injected engines, the throttle body is the part of the air intake system that controls the amount of air flowing into the engine, in response to driver accelerator pedal input in the main. The throttle body is usually located between the air filter box and the intake manifold, and it is usually attached to, or near, the mass airflow sensor.