Engine system with a supercharger
First Claim
1. An internal combustion engine system with a supercharger, the system comprising:
- a compressor system provided in an intake pipe and at least partially powered by an electric motor for compressing intake air;
a motor controller for controlling the electric motor;
a turbine system provided in an exhaust pipe and connected to the compressor for driving the compressor system, said turbine system comprising a turbine and means for adjusting rotation of the turbine;
a detector for detecting supercharging pressure downstream of said compressor system;
means for determining a target supercharging pressure based on the operational conditions of the engine;
means for calculating a first control demand value to be provided to the motor controller for driving the compressor system so that the supercharging pressure detected by the detector approaches the target supercharging pressure;
means for determining a target value of the first control demand value based on operational conditions of the engine; and
means for calculating a second control demand value to be provided to the turbine system for adjusting rotation of the turbine so that the first control demand value converges to the target value.
1 Assignment
0 Petitions
Accused Products
Abstract
An engine system includes a compressor system which is at least partially driven by an electric motor, and a turbine system. The system includes a detector for detecting an actual supercharging pressure. A target supercharging pressure is determined based on operational conditions of the engine. A first control demand value is calculated to drive the motor controller, such that the actual supercharging pressure approaches the target supercharging pressure. A target value of the first control demand value is determined based on the operational conditions of the engine. A second control demand value, a difference between the target value and the first control command value is applied to the turbine system to adjust the rotation of the turbine such that the first control demand value converges to the target value.
33 Citations
24 Claims
-
1. An internal combustion engine system with a supercharger, the system comprising:
-
a compressor system provided in an intake pipe and at least partially powered by an electric motor for compressing intake air;
a motor controller for controlling the electric motor;
a turbine system provided in an exhaust pipe and connected to the compressor for driving the compressor system, said turbine system comprising a turbine and means for adjusting rotation of the turbine;
a detector for detecting supercharging pressure downstream of said compressor system;
means for determining a target supercharging pressure based on the operational conditions of the engine;
means for calculating a first control demand value to be provided to the motor controller for driving the compressor system so that the supercharging pressure detected by the detector approaches the target supercharging pressure;
means for determining a target value of the first control demand value based on operational conditions of the engine; and
means for calculating a second control demand value to be provided to the turbine system for adjusting rotation of the turbine so that the first control demand value converges to the target value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for controlling an internal combustion engine system with a supercharger having a compressor system provided in an intake pipe and at least partially powered by an electric motor for compressing intake air, a motor controller for controlling the electric motor, a turbine system provided in an exhaust pipe and connected to the compressor for driving the compressor system, said turbine system comprising a turbine and means for adjusting rotation of the turbine, a detector for detecting supercharging pressure downstream of said compressor system, the method comprising the steps of;
-
determining a target supercharging pressure based on the operational conditions of the engine;
calculating a first control demand value to be provided to the motor controller for driving the compressor system so that the supercharging pressure detected by the detector approaches the target supercharging pressure;
determining a target value of the first control demand value based on operational conditions of the engine; and
calculating a second control demand value to be provided to the turbine system for adjusting rotation of the turbine so that the first control demand value converges to the target value. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A computer executable program stored in a computer readable medium for controlling an internal combustion engine system with a supercharger having a compressor system provided in an intake pipe and at least partially powered by an electric motor for compressing intake air, a motor controller for controlling the electric motor, a turbine system provided in an exhaust pipe and connected to the compressor for driving the compressor system, said turbine system comprising a turbine and means for adjusting rotation of the turbine, a detector for detecting supercharging pressure downstream of said compressor system, the program when executed performing:
-
determining a target supercharging pressure based on the operational conditions of the engine;
calculating a first control demand value to be provided to the motor controller for driving the compressor system so that the supercharging pressure detected by the detector approaches the target supercharging pressure;
determining a target value of the first control demand value based on operational conditions of the engine; and
calculating a second control demand value to be provided to the turbine system for adjusting rotation of the turbine so that the first control demand value converges to the target value. - View Dependent Claims (19, 20, 21, 22, 23, 24)
-
Specification