Drive control device of fuel pump
AssigneeDenso Corporation
InventorsKenichi Nagase, Kenji Nagasaki
Life of this patent
Estimating the term…
Abstract
A drive control device of a fuel pump for sucking fuel in a fuel tank supplying the fuel to an internal combustion engine, and using a motor with a brush as a drive source thereof. The drive control device includes a starting current reduction control device that starts the fuel pump in a state where a drive current of the fuel pump is reduced.
Claims12
A drive control device of a fuel pump for sucking fuel in a fuel tank of a vehicle, supplying the fuel to an internal combustion engine, and using a motor provided with a brush as a drive source thereof comprising:
- an idle stop control device that performs an idle stop for stopping the internal combustion engine and the fuel pump when a specified idle stop condition is satisfied while the vehicle is stopped and thereafter starts the fuel pump to automatically start the internal combustion engine when a driver performs a specified operation of starting the vehicle,
- wherein the idle stop control device at least one of predicts and detects at least one of a stress applied to the brush, a degree of deterioration of the brush, a rush current, a rush current peak value, a rush current duration, a state of the internal combustion engine, and a state of the vehicle at a time of starting the fuel pump, and
- wherein the idle stop control device switches between stop inhibition control of continuously driving the fuel pump without stopping the fuel pump even at a time of idle stop and control of stopping the fuel pump accordingly.
A drive control device of a fuel pump for sucking fuel in a fuel tank, supplying the fuel to an internal combustion engine, and using a motor provided with a brush as a drive source thereof, comprising:
- an idle stop control device that performs an idle stop for stopping the internal combustion engine and the fuel pump when a specified idle stop condition is satisfied while a vehicle is stopped and thereafter starts the fuel pump to automatically start the internal combustion engine when a driver performs a specified operation of starting the vehicle,
- wherein the idle stop control device at least one of predicts and detects at least one of stress applied to a brush, a degree of deterioration of the brush, a rush current, a rush current peak value, a rush current duration, a state of the internal combustion engine, and a state of the vehicle at a time of starting the fuel pump, and varies a frequency, with which the fuel pump is stopped by the idle stop accordingly.
A drive control device of a fuel pump for sucking fuel in a fuel tank of a vehicle, supplying the fuel to an internal combustion engine, and using a motor provided with a brush as a drive source thereof comprising:
- an idle stop control device that performs an idle stop for stopping the internal combustion engine and the fuel pump when a specified idle stop condition is satisfied while the vehicle is stopped and thereafter starts the fuel pump to automatically start the internal combustion engine when a driver performs a specified operation of starting the vehicle,
- wherein the idle stop control device has a section that predicts or detects at least one of a brush stress applied to the brush and a degree of deterioration of the brush, and
- wherein the idle stop control device has a section that inhibits stopping the fuel pump and continues to drive the fuel pump without stopping the fuel pump while stopping the engine at a time of satisfaction of the specified idle stop, when a predicted or detected value of the at least one of the brush stress and the degree of deterioration of the brush exceeds a predetermined value.
A drive control device of a fuel pump for sucking fuel in a fuel tank, supplying the fuel to an internal combustion engine, and using a motor provided with a brush as a drive source thereof, comprising:
- an idle stop control device that performs an idle stop for stopping the internal combustion engine and the fuel pump when a specified idle stop condition is satisfied while a vehicle is stopped and thereafter starts the fuel pump to automatically start the internal combustion engine when a driver performs a specified operation of starting the vehicle,
- wherein the idle stop control device has a section that predicts or detects at least one of brush stress applied to the brush and a degree of deterioration of the brush, and
- wherein the idle stop control device has a section that reduces a frequency of stopping the fuel pump relative to a frequency of satisfaction of the specified idle stop, as a predicted or detected value of the at least one of the brush stress and the degree of deterioration of the brush exceeds a predetermined value.
Dependencies are inferred from the claim text.