Systems and methods for LP-EGR delivery in a variable displacement engine
A technology of LP-EGR and engine, which is applied in the direction of combustion engine, engine control, machine/engine, etc., and can solve the problems of increasing combustion instability and misfire
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[0017] The present description relates to an EGR system connected to a turbocharged variable displacement engine in a motor vehicle. In one non-limiting example, a VDE engine may be configured to figure 1 A portion of an engine system shown in , wherein the engine includes at least one cylinder, a control system, a turbocharger, an exhaust gas recirculation system, and other components. The engine is also configured to have as in figure 2 Multiple cylinder banks shown in . The engine controller may be configured to execute control programs such as Figure 3 to Figure 4 Exemplary routine) to adjust LP based on the minimum cylinder load requirement of the engine when the engine transitions between operation with all cylinders enabled (non-VDE mode) and operation with one or more cylinders deactivated (VDE mode) - EGR schedule (schedule). Different EGR schedules may be selected based on engine speed load maps, such as the speed load maps of FIGS. 5A and 5B . refer to Imag...
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