Abstract:
A method to control a supercharged internal combustion engine (1) by means of a turbocharger (12) provided with a turbine (13) and a compressor (14) which compresses the air taken in; the control method includes the steps of determining the instantaneous rotation speed (w TC ) of the turbocharger (12); and calculating the average power ( P T ) delivered by the turbine (13) as a function of the absolute value | w TCj | of the j-th harmonic component of the instantaneous rotation speed (w TC ) of the turbocharger (12) and of the instantaneous rotation speed (w TC ) of the turbocharger (12); and controlling the supercharged internal combustion engine (1) as a function of the average power ( P T ) delivered by the turbine (13).
Abstract:
In a method for the control of a supercharge system with several turbine wheels, each of which is arranged in an exhaust conduit from cylinders in a combustion engine, different from the cylinders in whose exhaust conduits the one or several other turbine wheels are arranged, wherein the turbine wheels are arranged to each operate a compressor wheel, arranged in an air inlet conduit to the combustion engine, a value for the rotational speed of the respective turbine wheels is determined, and the rotational speed of the respective turbine wheels is controlled by way of impacting the fuel injection into those cylinders, whose exhaust conduit is connected with the turbine wheel.
Abstract:
An object is to provide a multi-stage electric centrifugal compressor and a supercharging system for an internal combustion engine with a driving unit of a rotational shaft that can be readily controlled when a single-shaft and two-stage centrifugal compressor is employed. A multi-stage electric centrifugal compressor includes: an electric motor; and a pair of centrifugal compressors coupled to either side of the electric motor, the pair of centrifugal compressors comprising a low-pressure stage compressor and a high-pressure stage compressor connected in series. The low-pressure stage compressor and the high-pressure stage compressor are formed to have different pressure ratios from each other.
Abstract:
A supercharging system includes a charging device having a turbine and a compressor, the compressor having a high speed shaft; a planetary gear set coupled to the high speed shaft and an electric motor, or generator, via a low speed drive shaft; a clutch unit; a power transmission for connecting a crank shaft of the combustion engine to the drive shaft via the clutch unit; at least one sensor to measure at least one physical parameter of the exhaust gases inside, or after having passed, an exhaust gas catalyzer of the internal combustion engine, the at least one sensor being configured to provide an output signal representing a measured value of the at least one physical parameter; and a system control unit to receive the output signal and to control the speed or effect of the electric motor, or generator, based on the output signal. A method is also disclosed.
Abstract:
A method to control a supercharged internal combustion engine (1) by means of a turbocharger (12) provided with a turbine (13) and a compressor (14) which compresses the air taken in; the control method includes the steps of determining the instantaneous rotation speed (w TC ) of the turbocharger (12); and calculating the average power ( P̅ T ) delivered by the turbine (13) as a function of the absolute value | w TCj | of the j-th harmonic component of the instantaneous rotation speed (w TC ) of the turbocharger (12) and of the instantaneous rotation speed (w TC ) of the turbocharger (12); and controlling the supercharged internal combustion engine (1) as a function of the average power ( P̅ T ) delivered by the turbine (13).
Abstract:
A system (100) is described for modeling various states of an operating engine and the adjustment of one or more operating characteristics of the engine based upon such modeling. A representative rate of change of a system mass for an engine is determined based upon, at least in part, a first state equation (102). A first representative mass flow approximating a mass flow across a throttle is determined based upon, at least in part, a second state equation (104). A second representative mass flow approximating a mass flow across an exhaust gas recirculation valve is determined based upon, at least in part, a third state equation (108). Determining the first representative mass flow includes specifying a throttle time constant modifier for the second state equation (106). Determining the second representative mass flow includes specifying an exhaust gas recirculation valve time constant modifier for the third state equation (110).
Abstract:
Based on entry/exit pressures of compressor 2a detected by atmospheric/boost pressure sensors 13 and 14, pressure ratio of compressor is calculated. Based on mass flow rate and entry temperature of intake air 4 detected by intake air flow-rate/temperature sensors 15 and 16 and entry pressure, volumetric flow rate of intake air is calculated in environmental condition at detection time using gas state equation, and is corrected into volumetric flow rate under standard environmental condition thorough multiplication by corrective coefficient based on entry temperature of intake air. Based on corrected value and calculated pressure ratio, rotational frequency of compressor under standard environmental condition is read out in light of operating characteristic diagram for compressor. Read-out rotational frequency is corrected into actual rotational frequency of compressor through multiplication by corrective coefficient based on entry temperature of intake air, which is determined as rotational frequency of turbocharger 2.
Abstract:
Disclosed are a method and a device which are used for regulating the boost pressure of an internal combustion engine (1) comprising a compressor (5) and allow a setpoint boost pressure to be adjusted quickly and without overshooting. According to the invention, an actuator (13) is provided by means of which the boost pressure of the compressor (5) is adjusted. An actuation variable for the actuator (13) is determined in accordance with a rotational speed of the compressor (5).
Abstract:
A device and a method for starting an internal combustion engine, provided with an exhaust turbine turbocharger (12), an electric motor generator (32), a power storage unit (35), an engine rotation starter device (24), injectors (18), and a control device (38) that controls the electric motor generator (32), the engine rotation starter device (24), and the injectors (18), wherein when an engine rotation activation start signal (102) is input and the rotational frequency of the exhaust turbine turbocharger (12) reaches an engine rotation-activation-starting rotational frequency, the control device (38) starts driving the engine rotation starter device (24), and when the engine rotational frequency reaches a fuel-supply-starting rotational frequency, the control device starts driving the injectors (18), thus improving the starting performance of the internal combustion engine.