Tests Show Cylinder Deactivation Improves Next-Gen Engines, Jacobs Says

Jacobs Vehicle Systems
Jacobs Vehicle Systems

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Jacobs Vehicle Systems’ cylinder deactivation technology delivered a “host of performance-enhancing benefits” in a recent independent validation, the company announced, including raising exhaust temperature and improving fuel consumption.

Independent engine tests were conducted by Cummins Inc., working with Tula Technology, a California-based company that specializes in combustion control and software technology, using Jacobs’ cylinder deactivation hardware.

Tula, working with Cummins, demonstrated that Jacobs’ CDA hardware combined with Tula’s Dynamic Skip Fire algorithm simultaneously maximized exhaust temperatures and carbon dioxide reductions. At 1,000 rpm, diesel DSF shows an increase in exhaust temperature of nearly 100 degrees Celsius. That occurs while still improving fuel consumption by 25% compared with the baseline testing without CDA on the same engine, along with similar improvements at other operating conditions, according to the Bloomfield, Conn.-based company, citing the test results.

“Jacobs’ CDA can be used to shut down engine cylinders at highway cruising speeds, or very low engine loads to improve fuel economy and still keep exhaust aftertreatment systems hot and operating at optimal temperatures to limit NOx emissions,” said Robb Janak, Jacobs’ director of new technologies. “We believe these systems are ready for the market, and we are excited with how technologies such as these will improve drivability, emissions and fuel economy.”

Next-generation engines are being designed to meet the upcoming round of new U.S. Environmental Protection Agency Phase 2 Greenhouse Gas Emissions standards slated to go into effect for heavy-duty diesel engines manufactured from 2021 through 2027. — Transport Topics

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