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Jacobs and Tula Collaborate on Deactivation Tech

August 8, 2019
With Jacobs’ CDA, cylinder deactivation mechanisms originally designed for a High Power Density (HPD) brake are used in the valvetrain

Jacobs Vehicle Systems has entered into a collaboration with internal combustion controls company Tula Technology. The two businesses will work together to enable Jacobs to further develop deactivation technologies, which reduce engine fuel consumption and emissions. 

Jacobs has announced the introduction of its Cylinder Deactivation (CDA) technology for medium and heavy-duty commercial vehicle engines. Tula has has also licensed its Dynamic Skip Fire (DSF) technology onto major automotive OEM gasoline applications. The new partnership will utilize Tula’s DSF controls technology to support Jacobs’ diesel deactivation hardware development. 

With Jacobs’ CDA, cylinder deactivation mechanisms originally designed for a High Power Density (HPD) brake are used in the valvetrain to disable the opening of the intake and exhaust valves. The hydraulically-activated mechanism is integrated into a collapsing valve bridge system. The CDA also reduces emissions by achieving higher exhaust temperatures, and maintaining aftertreatment temperatures. 

The Tula DSF system makes firing decisions based on how much torque is requested, and chooses which cylinders will be active or deactivated to meet performance demand.

Source: Jacobs

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