KR101961240B1 - System and method for controlling fuel of vehicle - Google Patents

System and method for controlling fuel of vehicle Download PDF

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Publication number
KR101961240B1
KR101961240B1 KR1020120106116A KR20120106116A KR101961240B1 KR 101961240 B1 KR101961240 B1 KR 101961240B1 KR 1020120106116 A KR1020120106116 A KR 1020120106116A KR 20120106116 A KR20120106116 A KR 20120106116A KR 101961240 B1 KR101961240 B1 KR 101961240B1
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South Korea
Prior art keywords
fuel
fuel amount
amount
learning value
final
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KR1020120106116A
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Korean (ko)
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KR20140039671A (en
Inventor
이경구
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콘티넨탈 오토모티브 시스템 주식회사
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/14Introducing closed-loop corrections
    • F02D41/1438Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/045Detection of accelerating or decelerating state
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

Abstract

The present invention discloses a fuel quantity control system and method for a vehicle. According to the present invention, the total lambda logic fuel amount is calculated as the sum of the fuel amount and the fuel amount learning value set by the lambda logic before the execution of the fuel cut mode, and the calculated total lambda logic fuel amount is compared with the predetermined determination reference value, Accumulating the lean fuel control time at the previous lean fuel control time when the amount of the logic fuel is equal to or greater than the determination reference value, and determining the excess lean fuel control if the accumulated lean fuel control time exceeds the predetermined time, It is possible to completely eliminate the excess oxygen amount generated during the execution of the fuel cut mode by correcting the additional fuel amount by the correction value derived from the difference between the total lambda logic fuel amount and the fuel amount learning value based on the difference between the fuel amount learning value and the predetermined reference value, It is possible to radically maximize the efficiency.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for controlling a fuel amount of a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system and a method for controlling a fuel amount of a vehicle, and more particularly, to a system and a method for controlling a fuel amount of a vehicle capable of eliminating an excess oxygen amount generated in an excessively lean fuel state by executing a fuel cut- will be.

Generally, an internal combustion engine, such as a gasoline engine used as a prime mover of an automobile, burns fuel in a cylinder and uses energy generated at this time as a power source. Therefore, the exhaust gas resulting from combustion contains harmful components such as nitrogen oxides and carbon monoxide or hydrocarbons due to incomplete combustion.

The exhaust gas resulting from such combustion contains harmful components such as nitrogen oxides and carbon monoxide or hydrocarbons due to incomplete combustion. As a countermeasure for solving the air pollution caused by the exhaust gas, a catalyst for purifying the harmful components in the exhaust gas is installed in the vehicle.

In this way, the catalyst installed in the vehicle absorbs and stores the oxygen in the exhaust gas when the exhaust gas is lean and the oxygen is rich in the exhaust gas due to combustion. On the contrary, when the exhaust gas due to combustion is rich in the harmful substances, When it is lean, it absorbs the adsorbed oxygen to oxidize the harmful substances in the exhaust gas, thereby reducing the exhaust gas.

In order to improve the catalytic efficiency, the engine is controlled in an open loop manner for a certain amount of fuel at a fuel amount higher than the stoichiometric air-fuel ratio in order to remove the excess amount of oxygen contained in the catalyst after executing the fuel cut mode during running.

That is, by setting the amount of fuel richer than the stoichiometric air-fuel ratio for a certain period of time in the running mode after idling, the excess amount of oxygen in the catalyst after the execution of the fuel cut mode is removed in an open loop manner. At this time, the open loop type fuel amount is determined as the sum of the fuel learning value corrected based on the fuel amount to the theoretical air-fuel ratio to the operation region and the additional fuel amount derived based on the oxygen amount in the catalyst calculated during the execution of the fuel cut-off mode.

Therefore, by calculating the amount of oxygen in the catalyst during the execution of the fuel cut mode and adding the amount of additional fuel proportional to the amount of excess oxygen to the amount of fuel set by the stoichiometric air-fuel ratio, the excess amount of oxygen can be removed in a short time, thereby maximizing the efficiency of the catalyst.

At this time, if the fuel learning value is limited or the fuel learning value is not present in the excessive squirting fuel state during execution of the fuel cut mode, the fuel amount considered as the learned fuel learning value is insufficient for the stoichiometric air-fuel ratio, Despite the lack of total fuel, catalyst efficiency decreased and emissions of exhaust gas increased accordingly.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a fuel supply control system and a fuel supply control method, which are capable of calculating a total lambda logic fuel amount by a sum of a fuel amount and a fuel amount learning value set by a lambda logic before execution of a fuel cut- Comparing the total lambda logic fuel quantity with a predefined threshold value, comparing the total lambda logic fuel quantity with a predefined threshold value, determining a lean fuel control if the total lambda logic fuel quantity is greater than or equal to the determination reference value, Providing a fuel amount control method for a vehicle in which when the lean fuel control time exceeds the predetermined time, the total lambda logic fuel amount and the fuel amount learning value are subtracted from each other, and the final fuel amount is set by an additional fuel amount correction based on the predetermined reference value. In order to remove the excess oxygen amount after the execution of the fuel cut mode, As during the execution of a control quantity of fuel-rich air-fuel ratio than the open-loop fuel control segment added fuel amount in the correction value derived from the difference between the total fuel quantity and engine lambda logic learning correction value, it is possible to essentially maximize the catalytic efficiency.

It is another object of the present invention to provide a fuel injection control system and a fuel injection control method of a fuel injection control system for a fuel injection control system in which a total lambda logic fuel amount is calculated as a sum of a fuel amount and a fuel amount learning value set by a lambda logic before execution of a fuel cut mode, The fuel amount calculating unit compares the calculated total lambda logic fuel amount with a predetermined determination reference value, and when the total lambda logic fuel amount is equal to or greater than the determination reference value, the lean fuel control time is determined to be the excessive lean fuel control, A lean fuel control time computing unit for calculating an additional fuel amount based on a sum of the total lambda logic fuel amount and the fuel amount learning value when the accumulated lean fuel control time exceeds the predetermined time, The fuel amount of the vehicle including the final fuel amount setting unit to be controlled The control system is provided so that the correction value derived from the difference between the total lambda logic fuel amount and the engine learning value during the open loop fuel control period in which the fuel amount control that is richer than the stoichiometric air- The catalyst efficiency can be substantially maximized.

According to an aspect of the present invention, there is provided a fuel quantity control system for a vehicle,

A total lambda logic fuel quantity calculation unit for calculating a total lambda logic fuel quantity by a sum of the fuel quantity and the fuel quantity learning value set by the lambda logic before the execution of the fuel cut mode,

The lean fuel control time is compared with a predetermined determination reference value, and when the total lambda logic fuel amount is equal to or greater than the determination reference value, the lean fuel control time is determined to be the lean fuel control time, A time calculation unit,

 And an open loop fuel control execution section for driving the engine with a final fuel quantity 1, which is set based on the base fuel quantity and the excess oxygen quantity in the catalyst, when the accumulated lean fuel control time does not exceed the predefined predetermined time .

Preferably,

A correction value 2 derived from the total lambda logic fuel amount and the fuel amount learning value in accordance with the comparison result between the total lambda logic fuel amount and the fuel amount learning value and the predetermined reference value when the accumulated lean fuel control time exceeds the predetermined time And a final fuel amount setting unit for driving the engine with a final fuel amount 2 that reflects the final fuel amount.

Preferably,

Fuel ratio and a fuel amount learning value corresponding to the air-fuel ratio and set as a table value.

Preferably the final fuel quantity 2 is

And setting a correction value 2 derived based on a difference between the final fuel amount 1 set by the open loop fuel control and the total lambda logic fuel amount and the fuel amount learning value.

Preferably, the final fuel amount setting unit includes:

A comparison module for determining whether a difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value,

A first final fuel amount setting module for driving the engine with the final fuel amount 1 by the open loop fuel control when the difference between the total lambda logic fuel amount and the fuel amount learning value is not equal to or greater than the reference value as a result of the comparison module,

And a second final fuel amount setting module for driving the engine with the final fuel amount 2 when the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value as a result of the comparison of the comparison module.

According to an aspect of the present invention, there is provided a fuel amount control method for a vehicle,

A total lambda logic fuel amount calculation step of calculating a total lambda logic fuel amount by a sum of a fuel amount and a fuel amount learning value set by the lambda logic before the execution of the fuel cut mode in the engine control unit,

The lean fuel control time is compared with a predetermined determination reference value, and when the total lambda logic fuel amount is equal to or greater than the determination reference value, the lean fuel control time is determined to be the lean fuel control time, A time computing step,

Loop fuel control executing section for driving the engine with the final fuel amount 1 reflecting the correction value 1 set based on the basic fuel amount and the excess oxygen amount in the catalyst when the accumulated lean fuel control time does not exceed the predefined predetermined time .

Preferably,

A correction value 2 derived from the total lambda logic fuel amount and the fuel amount learning value in accordance with the comparison result of the difference between the total lambda logic fuel amount and the fuel amount learning value and the predetermined reference value when the accumulated lean fuel control time exceeds the predetermined time And a final fuel amount setting step of driving the engine with a final fuel amount of 2 reflected.

Preferably,

Fuel ratio and a fuel amount learning value corresponding to the air-fuel ratio and set as a table value.

Preferably, the final fuel quantity 2,

And setting a correction value 2 derived based on a difference between the final fuel amount 1 set by the open loop fuel control and the total lambda logic fuel amount and the fuel amount learning value.

Preferably, the final fuel amount setting step includes:

Comparing the difference between the total lambda logic fuel amount and the fuel amount learning value to a predetermined reference value,

When the difference between the total lambda logic fuel amount and the fuel amount learning value is not equal to or greater than the reference value, the engine is driven with the final fuel amount 1 set through the open loop fuel control,

When the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value, the engine is driven by the final fuel amount 2.

As described above, according to the vehicle fuel amount control system and method of the present invention, the total lambda logic fuel amount is calculated as the sum of the fuel amount and the fuel amount learning value set by the lambda logic before the execution of the fuel cut mode, Comparing the amount of logic fuel with a predefined threshold value, comparing the total lambda logic fuel amount with the predefined threshold value, determining the excess lean fuel control to accumulate the lean fuel control time at the previous lean fuel control time, When the time exceeds the predetermined time, by correcting the additional fuel amount with the correction value derived from the difference between the total lambda logic fuel amount and the fuel amount learning value and the difference between the total lambda logic fuel amount and the fuel amount learning value based on the predetermined reference value, It is possible to completely remove the excess oxygen amount generated during the cut mode, It is possible to radically maximize the efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
1 is a view showing a configuration of a fuel quantity control system for a vehicle according to an embodiment of the present invention.
FIG. 2 is a diagram showing the configuration of the final fuel amount setting unit shown in FIG. 1; FIG.
3 is a flowchart illustrating a fuel amount control process of a vehicle according to another embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

FIG. 1 is a view showing a configuration of a fuel amount control system for a vehicle according to an embodiment of the present invention, and FIG. 2 is a detailed view of the configuration of a final fuel amount setting unit shown in FIG.

As shown in the figure, the fuel amount control system for a vehicle according to the embodiment of the present invention calculates the total lambda logic fuel amount by the sum of the fuel amount and the fuel amount learning value set by the lambda logic before the execution of the fuel cut mode, Comparing the amount of logic fuel with a predefined threshold value, comparing the total lambda logic fuel amount with the predefined threshold value, determining the excess lean fuel control to accumulate the lean fuel control time at the previous lean fuel control time, And correcting the additional fuel amount to a correction value derived from a difference between the total lambda logic fuel amount and the fuel amount learning value based on a difference between the total lambda logic fuel amount and the fuel amount learning value and a predetermined reference value when the time exceeds the predetermined time, Such a system includes a total lambda logic fuel amount calculation A lean fuel control time calculation unit 30, an open loop fuel control execution unit 50, and a final fuel amount setting unit 70. The open fuel control unit 50,

Here, the total lambda logic fuel quantity calculation unit 10 is provided to calculate the total lambda logic fuel quantity as the sum of the fuel quantity and the fuel quantity learning value set by the lambda logic before the execution of the fuel cut mode.

The lean fuel control time calculation unit 30 compares the total lambda logic fuel amount of the calculation unit 10 calculated with the total lambda logic fuel amount with a predetermined determination reference value and if the total lambda logic fuel amount is equal to or greater than the determination reference value Lean fuel control, and accumulates the lean fuel control time at the previous lean fuel control time.

If the accumulated lean fuel control time does not exceed the predefined predetermined time, the open-loop fuel control execution section 50 performs the open-loop fuel control execution to the engine with the final fuel amount 1 reflecting the correction value 1 set based on the base fuel amount and the excess oxygen amount in the catalyst Respectively.

Here, the base fuel amount is provided as a sum of a calibration data value and a fuel amount learning value set to a table value corresponding to the air-fuel ratio.

The calibration data value and the fuel amount learning value are stored in a predetermined position in the memory as a lookup table value corresponding to the air-fuel ratio as a result value obtained through a number of experiments.

The open loop fuel control process for driving the engine with the final fuel quantity 1 reflecting the correction value 1 set on the basis of the basic fuel quantity and the excess oxygen quantity in the catalyst is well known and will not be described in detail.

On the other hand, when the accumulated lean fuel control time exceeds the predetermined time, the final fuel amount setting unit 70 sets the total lambda logic fuel amount and the fuel amount learning value based on the comparison result of the difference between the total lambda logic fuel amount and the fuel amount learning value, And is driven to drive the engine at a final fuel quantity 2 reflecting the correction value 2 derived from the logic fuel quantity and the fuel quantity learning value.

Here, the final fuel amount 2 is set reflecting the correction value 2 derived based on the difference between the final fuel amount 1 set by the initial open loop fuel control and the total lambda logic fuel amount and the fuel amount learning value.

2, the final fuel amount setting unit 70 includes a comparison module 71 for determining whether the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value, A first final fuel amount setting module 73 for driving the engine with the final fuel amount 1 by the open loop fuel control when the difference between the total lambda logic fuel amount and the fuel amount learning value is not equal to or greater than the reference value, And a second final fuel amount setting module 75 for driving the engine with the final fuel amount 2 when the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value.

That is, according to the embodiment of the present invention, the total lambda logic fuel quantity calculation unit 10 calculates the total lambda logic fuel quantity by the sum of the fuel quantity and the fuel quantity learning value set by the lambda logic before the execution of the fuel cut mode, The logic fuel amount is provided to the lean fuel control time arithmetic unit 30.

The lean fuel control time calculation unit 30 compares the total lambda logic fuel amount with a predetermined determination reference value, and when the total lambda logic fuel amount is equal to or greater than the determination reference value as a result of the comparison, it is determined to be an excessive lean fuel control, Accumulates at the previous lean fuel control time.

When the accumulated lean fuel control time exceeds the preset predetermined time, the open-loop fuel control execution unit 50 performs the open-loop fuel control execution based on the total lambda logic fuel amount and the fuel amount learning value, The final fuel amount 1 is further corrected by the correction value derived from the difference between the logical fuel amount and the fuel amount learning value.

That is, the comparison module 71 determines whether the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value, and if the difference between the total lambda logic fuel amount and the fuel amount learning value If it is not more than the reference value, the first final fuel amount setting module 73 drives the engine with the final fuel amount 1 by the open loop fuel control.

If the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value as a result of the comparison of the comparison module 71, the second final fuel amount setting module 75 drives the engine with the final fuel amount 2.

Therefore, by driving the engine with the final fuel amount 1 reflecting the correction value 2 derived by the difference between the total lambda logic fuel amount and the fuel amount learning value to the final fuel amount 1 or the final fuel amount 1 derived through the open loop fuel control after executing the fuel cut mode, It is possible to completely eliminate the excess oxygen amount generated during the cut mode and to substantially maximize the catalytic efficiency.

A correction value 2 derived by subtracting the total lambda logic fuel amount and the fuel amount learning value from the final fuel amount 1 or the final fuel amount 1 derived through the open loop fuel control after the execution of the fuel cut mode to remove the excess oxygen amount generated during the execution of the fuel cut mode The process of driving the engine with the reflected final amount of fuel 2 will be described in detail with reference to FIG. FIG. 3 is a flowchart showing the operation of the fuel quantity control system of the vehicle shown in FIG. 1. Referring to FIG. 3, the process of controlling the fuel quantity of the vehicle according to another embodiment of the present invention will be described.

First, the total lambda logic fuel amount calculating unit 10 calculates the total lambda logic fuel amount by summing the lambda logic fuel amount and the fuel amount learning value set by the running lambda logic fuel control in the fuel cut mode after executing the fuel cut mode through step 101, The fuel amount is derived.

The lean fuel control time computing unit 30 compares the total lambda logic fuel amount with a predetermined determination reference value through step 103. When the total lambda logic fuel amount is equal to or greater than the determination reference value, (Step 105), and the lean fuel control time is accumulated at the previous lean fuel control time (step 107).

Then, the open-loop fuel control execution unit 50 determines whether the lean fuel control time accumulated in the step 107 has exceeded a predetermined time (step 109), and as a result of the determination in the step 109, If the fuel control time does not exceed the predetermined time, the open-loop fuel control execution unit 50 proceeds to step 111. [

In step (111), the open-loop fuel control is executed so that the engine is driven with the final fuel amount 1 reflecting the correction value 1 derived based on the amount of oxygen contained in the catalyst in the base fuel amount.

On the other hand, if the lean fuel control time accumulated in step 109 exceeds the predetermined time, the final fuel amount setting unit 70 proceeds to step 113. In step 113, The difference between the total lambda logic fuel amount and the fuel amount learning value is calculated, and then, in step 115, the difference between the total lambda logic fuel amount and the fuel amount learning value is compared with a preset reference value.

If the difference between the total lambda logic fuel amount and the fuel amount learning value is not equal to or greater than the predetermined reference value, the process proceeds to step 111 and the engine is driven to the final fuel amount 1 obtained through the open loop fuel control logic.

However, when the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than a predetermined reference value as a result of the comparison in the step 115, the correction value 2 derived from the difference between the total lambda logic fuel amount and the fuel amount learning value is reflected in the final fuel amount 1 The engine is driven with a fuel quantity of 2 (step 117).

According to the embodiment of the present invention, when the lean fuel control time elapses a predetermined time and the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value, the total lambda logic fuel amount and the total lambda logic fuel amount If the fuel amount learning value does not exist or the fuel amount learning value is limited as the engine is driven with the final fuel amount 2 reflecting the correction value 2 derived from the difference between the fuel amount learning value and the fuel amount learning value, The excess oxygen amount generated during the execution of the fuel cut mode can be removed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is, therefore, to be understood that the above-described embodiments are illustrative in all respects and not as restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

The total lambda logic fuel amount is calculated as the sum of the fuel amount and the fuel amount learning value set by the lambda logic before the execution of the fuel cut mode, and the calculated total lambda logic fuel amount is compared with the predetermined determination reference value, Accumulating the lean fuel control time at the previous lean fuel control time and determining the lean fuel control time as the lean fuel control time when the accumulated lean fuel control time exceeds the predetermined time, And correcting the additional fuel amount with the correction value derived from the difference between the total lambda logic fuel amount and the fuel amount learning value based on the predefined reference value, the excess oxygen amount generated during the execution of the fuel cut mode can be completely eliminated and the catalyst efficiency is fundamentally maximized Of the operation of the fuel quantity control system and method of the vehicle Accuracy and reliability terms, a further so can lead to great advances, in the invention, commercially available, or because the degree Industrial Applicability sufficient possibility of operating not only to obviously practical embodiment of a vehicle that is applied to performance efficiency.

Claims (10)

  1. A total lambda logic fuel quantity calculation unit for calculating a total lambda logic fuel quantity by a sum of the fuel quantity and the fuel quantity learning value set by the lambda logic before the execution of the fuel cut mode,
    The lean fuel control time is compared with a predetermined determination reference value, and when the total lambda logic fuel amount is equal to or greater than the determination reference value, the lean fuel control time is determined to be the lean fuel control time, A time calculation unit,
    An open-loop fuel control executing section for driving the engine with a final fuel quantity 1 reflecting a correction value 1 set based on the basic fuel quantity and the excess oxygen quantity in the catalyst when the accumulated lean fuel control time does not exceed the predefined predetermined time,
    A correction value 2 derived from the total lambda logic fuel amount and the fuel amount learning value in accordance with the comparison result of the difference between the total lambda logic fuel amount and the fuel amount learning value and the predetermined reference value when the accumulated lean fuel control time exceeds the predetermined time And a final fuel quantity setting unit for driving the engine with a final fuel quantity of 2 reflected by the fuel quantity setting unit.
  2. delete
  3. 2. The fuel cell system according to claim 1,
    Fuel ratio and a fuel amount learning value corresponding to the air-fuel ratio and set as a table value.
  4. The method of claim 1, wherein the final fuel quantity 2 is
    And setting a correction value 2 derived based on a difference between the final fuel amount 1 set by the open loop fuel control and the total lambda logic fuel amount and the fuel amount learning value.
  5. 5. The fuel supply system according to claim 4,
    A comparison module for determining whether a difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value,
    A first final fuel amount setting module for driving the engine with the final fuel amount 1 by the open loop fuel control when the difference between the total lambda logic fuel amount and the fuel amount learning value is not equal to or greater than the reference value as a result of the comparison module,
    And a second final fuel amount setting module for driving the engine with the final fuel amount 2 when a difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value as a result of the comparison of the comparison module.
  6. A total lambda logic fuel amount calculation step of calculating a total lambda logic fuel amount by a sum of a fuel amount and a fuel amount learning value set by the lambda logic before the execution of the fuel cut mode in the engine control unit,
    The lean fuel control time is compared with a predetermined determination reference value, and when the total lambda logic fuel amount is equal to or greater than the determination reference value, the lean fuel control time is determined to be the lean fuel control time, A time computing step,
    An open loop fuel control step of driving the engine with a final fuel amount 1 reflecting a correction value 1 set on the basis of the basic fuel amount and the excess oxygen amount in the catalyst when the accumulated lean fuel control time does not exceed the predefined predetermined time,
    A correction value 2 derived from the total lambda logic fuel amount and the fuel amount learning value in accordance with the comparison result of the difference between the total lambda logic fuel amount and the fuel amount learning value and the predetermined reference value when the accumulated lean fuel control time exceeds the predetermined time And a final fuel amount setting step of driving the engine with a final fuel amount of 2 reflected.
  7. delete
  8. 7. The fuel cell system according to claim 6,
    Fuel ratio and a fuel-amount learning value corresponding to the air-fuel ratio and set as a table value.
  9. The method of claim 8, wherein the final fuel quantity (2)
    Wherein the control unit is configured to reflect the correction value 2 derived based on the difference between the final fuel amount 1 set by the open loop fuel control and the total lambda logic fuel amount and the fuel amount learning value.
  10. The method according to claim 9, wherein the final fuel amount setting step includes:
    Comparing the difference between the total lambda logic fuel amount and the fuel amount learning value to a predetermined reference value,
    When the difference between the total lambda logic fuel amount and the fuel amount learning value is not equal to or greater than the reference value, the engine is driven with the final fuel amount 1 set through the open loop fuel control,
    And when the difference between the total lambda logic fuel amount and the fuel amount learning value is equal to or greater than the reference value, the engine is driven to the final fuel amount 2.
KR1020120106116A 2012-09-24 2012-09-24 System and method for controlling fuel of vehicle KR101961240B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003172176A (en) 2001-12-06 2003-06-20 Toyota Motor Corp Fuel feed control method and device for internal combustion engine
JP2005083205A (en) 2003-09-04 2005-03-31 Toyota Motor Corp Control device for internal combustion engine
JP2005113729A (en) 2003-10-06 2005-04-28 Toyota Motor Corp Air fuel ratio control device for internal combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100520517B1 (en) * 2002-12-10 2005-10-11 현대자동차주식회사 Method for oxygen remove on catalyst of vehicle
KR100634597B1 (en) * 2004-07-07 2006-10-16 현대자동차주식회사 A catalyst activate control method of vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003172176A (en) 2001-12-06 2003-06-20 Toyota Motor Corp Fuel feed control method and device for internal combustion engine
JP2005083205A (en) 2003-09-04 2005-03-31 Toyota Motor Corp Control device for internal combustion engine
JP2005113729A (en) 2003-10-06 2005-04-28 Toyota Motor Corp Air fuel ratio control device for internal combustion engine

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