Engine system with at least one deactivatable cylinder and an electric booster

摘要

The system comprises a multi-cylinder engine 5 with at least one deactivatable cylinder, a turbocharger 10 and an electric booster 20. The booster supplies pressurised air to the compressor 11 of the turbocharger and is activated by an electronic controller 40 when at least one cylinder is deactivated and at least one booster operating condition is met. The operating conditions may be engine speed or torque demand ranges. The system may include exhaust gas recirculation and an after-treatment device 30. The system may be used in a vehicle with an energy recirculation arrangement and an electrical energy storage device to power the booster. Also claimed is a method of controlling the system.