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US 9,435,282 B2Granted
Fuel supplying controller
AssigneeDenso Corporation
InventorHiromu Kashiyama
Life of this patent
Estimating the term…
Abstract
In a fuel supplying controller detecting a clogging of a fuel filter, a timer count portion includes a steady count portion and an unsteady count portion. The steady count portion adds a steady count value to a timer counter in a steady state where a vehicle-state value is less than a threshold. The unsteady count portion adds an unsteady count value that is greater than the steady count value to the timer counter in an unsteady state where the vehicle-state value is greater than or equal to the threshold.
Claims5
A fuel supplying controller comprising:
- a fuel tank accommodating a fuel;
- a supply pump supplying the fuel from the fuel tank to an internal combustion engine of a vehicle;
- a fuel filter provided in a passage between the fuel tank and the supply pump, the fuel filter filtering the fuel;
- a clogging detection portion detecting a clogging of the fuel filter;
- a period setting portion setting a non-detection period where a clogging detection according to the clogging detection portion is prohibited;
- a comparison portion comparing a vehicle-state value with a threshold;
- and
- a timer count portion executing a count until a timer counter exceeds the nondetection period, after a start of the internal combustion engine, wherein the timer count portion includes
- a steady count portion adding a steady count value to the timer counter in a steady state where a vehicle-state value is less than the threshold, and
- an unsteady count portion adding an unsteady count value that is greater than the steady count value to the timer counter in an unsteady state where the vehicle-state value is greater than or equal to the threshold, and
- the vehicle-state value is a value indicating a vehicle state and is a fuel return amount corresponding to a fuel amount returned to the fuel tank from the internal combustion engine, and
- the steady state includes a state that the fuel return amount is less than the threshold.
9 more elements
A fuel supplying controller comprising:
- a fuel tank accommodating a fuel;
- a supply pump supplying the fuel from the fuel tank to an internal combustion engine of a vehicle;
- a fuel filter provided in a passage between the fuel tank and the supply pump, the fuel filter filtering the fuel;
- a clogging detection portion detecting a clogging of the fuel filter;
- a period setting portion setting a non-detection period where a clogging detection according to the clogging detection portion is prohibited;
- and
- a timer count portion executing a count until a timer counter exceeds the non-detection period, after a start of the internal combustion engine,
- a comparison portion comparing vehicle-state values with corresponding thresholds, respectively;
- wherein
- the timer count portion includes
- an unsteady count portion adding an unsteady count value to the timer counter in an unsteady state where at least one of the vehicle-state values is greater than or equal to the corresponding threshold, and
- a steady count portion adding a steady count value to the timer counter in a steady state where all of the vehicle-state values are less than the corresponding thresholds, respectively,
- the unsteady count value is greater than the steady count value,
- the vehicle-state value is a value indicating a vehicle state;
- the vehicle-state values include a fuel return amount corresponding to a fuel amount returned to the fuel tank from the internal combustion engine, and
- the steady state includes a state that the fuel return amount is less than the threshold.
13 more elements
Dependencies are inferred from the claim text.