Delphi has recently been active in investment and acquisitions to improve its comprehensive capabilities in areas such as autonomous driving and fuel economy. Tula Technology has also become Delphi's investment target, and the two companies will use advanced technology that integrates digital signal processing and powertrain control to create a variable displacement engine.
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Dynamic Jump Ignition (DSF) allows the engine cylinder to complete an ignition or jump (cylinder) operation on a continuously variable basis. In the case of an eight-cylinder engine, a car with DSF engine technology can improve fuel economy by 17% compared to an engine without cylinder deactivation.
According to Tula Technology, DSF technology does not rely on fixed cylinder deactivation or just a fixed form of switching. Instead, it can continuously make dynamic ignition decisions for each cylinder at any time, and provide the most reasonable torque for the car by adjusting the number of cylinder firings and cylinder load.
Tula Technology engineers summarized two advantages of DSF technology:
First, improve fuel economy by eliminating pumping losses and optimizing combustion. Each engine speed corresponds to an optimum thermal efficiency value, and minimizing pump loss can increase the dynamic load of the throttle engine. During combustion, the engine combustion system may be optimized to accommodate vehicle operating conditions. Therefore, once the intake/exhaust valves are properly adjusted, the inactive cylinders will not pump air to the engine, allowing the three-way catalyst technology to function adequately.
Second, effective control of vibration and noise. In conventional engine throttling operations, the excitation spectrum is closely related to the engine speed, and the amplitude of the vibration is also determined by throttling. DSF technology can be used to change the torque of the vehicle's powertrain to solve noise, vibration and harshness (NVH) problems in a flexible and systematic way.
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