Cummins diesel engines will receive a cylinder shutdown systemApril 28, 2020
American company Cummins Inc. announced the appearance of a cylinder shutdown system on its diesel engines, which would reduce fuel consumption and the amount of harmful emissions.
It is worth noting that Cummins diesel engines are widespread throughout the world and are used in trucks and light commercial vehicles (LCVs). The company’s power plants are serially installed on cars of several dozen brands
The system, dubbed Dynamic Skip Fire (DSF), is now being tested as part of the 6-cylinder 15.0-liter Cummins X15 in-line engine used in heavy vehicles. If the tests are successful, the DSF will first appear on long-range tractors, and then on smaller motors for pickups and LCVs.
Specialists of the brand are engaged in the introduction of DSF together with a small engineering company Tula Tech from Silicon Valley, which is the system developer (the first tests on passenger cars were carried out back in 2008). The company is financially supported by component manufacturer Delphi, the automotive group General Motors and several venture capital funds.
Note that a similar system is already used in GM cars. moreover, some gasoline engines have received it since 1981. It is used on the V6 and V8, allows you to turn off two to four cylinders, which saves 5.5-7.5% of fuel consumption.
True, she has a peculiarity – she disables the programmed number of cylinders, and DSF works dynamically: when and which cylinders to turn off, she decides every 90 degrees of crankshaft rotation in the case of V8 or 180 degrees – in the case of a 4-cylinder in-line. As a result, the engine works in the most optimal way, a significant reduction in harmful emissions is achieved, while the engine runs smoothly.
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