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US 12,264,683 B2Granted
Method for controlling an electrically supported exhaust gas turbocharger
AssigneeRobert Bosch GmbH
InventorRainer Weigand
Life of this patent
Estimating the term…
Abstract
A method for controlling an electrically supported exhaust gas turbocharger. A planned effective turbine area is ascertained in an observing path for the electrically supported exhaust gas turbocharger and an observed effective turbine area is ascertained in a planned controlling path. A correction signal for the electrically supported exhaust gas turbocharger is ascertained as a function of the difference between the planned effective turbine area and the observed effective turbine area and an actuator being controlled as a function of the planned effective turbine area and/or the electric machine being activated for controlling the electrically supported exhaust gas turbocharger.
Claims10
A method for controlling an electrically supported exhaust gas turbocharger, comprising the following steps:
- ascertaining a monitored effective turbine area in a monitoring path for the electrically supported exhaust gas turbocharger;
- ascertaining a planned effective turbine area in a planned controlling path;
- ascertaining a correction signal for the electrically supported exhaust gas turbocharger as a function of a difference between the planned effective turbine area and the monitored effective turbine area;
- (i) controlling an actuator as a function of the planned effective turbine area, and/or (ii) activating an electric machine for controlling the electrically supported exhaust gas turbocharger, for a supporting operation corresponding to a boost mode of the electrically supported exhaust gas turbocharger;
- taking a mechanical driving power from an exhaust gas turbine until the taking of the mechanical driving power is restricted by component protection limits;
- for a recuperative operation of the electrically supported exhaust gas turbocharger, determining a difference between a maximally possible turbine power and a planned compressor power by taking into account the component protection limits;
- restricting a maximally possible extracted recuperative power for obtaining electrical energy to the difference between the maximally possible turbine power and the planned compressor power;
- and
- ascertaining the maximally possible turbine power as a function of a minimal turbine area and/or an exhaust gas back pressure and/or an exhaust gas mass flow.
6 more elements
A method for controlling an electrically supported exhaust gas turbocharger, comprising the following steps:
- ascertaining a monitored effective turbine area of a turbine in a monitoring path for the electrically supported exhaust gas turbocharger;
- ascertaining a planned effective turbine area in a planned controlling path;
- ascertaining a correction signal for the electrically supported exhaust gas turbocharger as a function of a difference between the planned effective turbine area and the monitored effective turbine area;
- and (i) controlling an actuator as a function of the planned effective turbine area, and (ii) activating an electric machine for controlling the electrically supported exhaust gas turbocharger wherein a maximally possible rotational speed gradient is ascertained as a function of a minimally effective turbine area and/or an exhaust gas temperature and/or an exhaust gas mass flow, and as a function of a maximally available electrical power of the electric machine, wherein based on a gradient of a setpoint rotational speed exceeding the maximally possible rotational speed gradient by at least 10%, a supporting operation of the electric machine is carried out for the electrically supported exhaust gas turbocharger and the turbine is set to a minimal turbine area.
1 more element
A method for controlling an electrically supported exhaust gas turbocharger, comprising the following steps:
- ascertaining a monitored effective turbine area in a monitoring path for the electrically supported exhaust gas turbocharger;
- ascertaining a planned effective turbine area in a planned controlling path;
- ascertaining a correction signal for the electrically supported exhaust gas turbocharger as a function of a difference between the planned effective turbine area and the monitored effective turbine area;
- (i) controlling an actuator as a function of the planned effective turbine area, and/or (ii) activating an electric machine for controlling the electrically supported exhaust gas turbocharger, for a supporting operation corresponding to a boost mode of the electrically supported exhaust gas turbocharger;
- taking a mechanical driving power from an exhaust gas turbine until the taking of the mechanical driving power is restricted by component protection limits;
- for a recuperative operation of the electrically supported exhaust gas turbocharger, determining a difference between a maximally possible turbine power and a planned compressor power by taking into account the component protection limits;
- and
- restricting an extracted recuperative power to the difference between the maximally possible turbine power and the planned compressor power, wherein a maximally possible rotational speed gradient is ascertained as a function of a minimally effective turbine area and/or an exhaust gas temperature and/or an exhaust gas mass flow, and as a function of a maximally available electrical power of the electric machine, wherein based on a gradient of a setpoint rotational speed exceeding the maximally possible rotational speed gradient, a signal is transmitted from an engine control unit to a control unit of the electrically supported exhaust gas turbocharger and the control unit of the electrically supported exhaust gas turbocharger requests in a coordinator an electrically supporting operation for the electrically supported exhaust gas turbocharger.
5 more elements
A device, comprising:
- a control unit for controlling an electrically supported exhaust gas turbocharger, the control unit being configured to:
- ascertain a monitored effective turbine area in a monitoring path for the electrically supported exhaust gas turbocharger;
- ascertaining a planned effective turbine area in a planned controlling path;
- ascertaining a correction signal for the electrically supported exhaust gas turbocharger as a function of a difference between the planned effective turbine area and the monitored effective turbine area;
- (i) control an actuator as a function of the planned effective turbine area, and/or
- (ii) activate an electric machine for controlling the electrically supported exhaust gas turbocharger, for a supporting operation corresponding to a boost mode of the electrically supported exhaust gas turbocharger;
- take a mechanical driving power from an exhaust gas turbine until the taking of the mechanical driving power is restricted by component protection limits;
- for a recuperative operation of the electrically supported exhaust gas turbocharger, determine a difference between a maximally possible turbine power and a planned compressor power by taking into account the component protection limits;
- restrict a maximally possible extracted recuperative power for obtaining electrical energy to the difference between the maximally possible turbine power and the planned compressor power;
- and
- ascertain the maximally possible turbine power as a function of a minimal turbine area and/or an exhaust gas back pressure and/or an exhaust gas mass flow.
8 more elements
Dependencies are inferred from the claim text.