Supercharger-equipped engine
AssigneeMazda Motor Corporation
InventorKenichi Morizane
Life of this patent
Estimating the term…
Abstract
A supercharged engine includes an engine body, an electric supercharger, a turbocharger, an EGR passage establishing communication between an exhaust passage downstream from a turbine of the turbocharger and an intake passage upstream from a compressor of the turbocharger, a fuel supply unit configured to supply fuel into a cylinder, and a controller configured to open the EGR passage and output a control signal to the electric supercharger to increase a boost pressure of the electric supercharger during acceleration of the vehicle in which an amount of the fuel supplied by the fuel supply unit is increased in response to an acceleration request signal.
Claims10
A supercharger-equipped engine, comprising:
- an engine body mounted in a vehicle;
- an intake passage and an exhaust passage both connected to the engine body;
- an electric supercharger provided in the intake passage and configured to perform supercharging by an electric motor;
- a turbocharger including a turbine disposed in the exhaust passage and a compressor disposed in the intake passage upstream from the electric supercharger, the turbocharger configured to perform supercharging by utilizing exhaust energy;
- a first exhaust gas recirculation (EGR) passage establishing communication between the exhaust passage downstream from the turbine and the intake passage upstream from the compressor, the first EGR passage recirculating a portion of exhaust gas to the intake passage;
- a second EGR passage establishing communication between the exhaust passage upstream from the turbine and the intake passage downstream from the electric supercharger, the second EGR passage recirculating a portion of the exhaust gas to the intake passage;
- an injector configured to supply fuel into a cylinder of the engine body;
- and
- a controller configured to open the first EGR passage and output a control signal to the electric supercharger to increase a boost pressure of the electric supercharger during acceleration of the vehicle in which an amount of the fuel supplied by the injector is increased in response to an acceleration request signal, wherein
- an amount of the exhaust gas introduced into the cylinder via the second EGR passage is smaller than an amount of the exhaust gas introduced into the cylinder via the first EGR passage.
Dependencies are inferred from the claim text.