WO2012099349A2 - Apparatus for controlling engine torque, and method for preventing the misdiagnosis of knocking - Google Patents

Apparatus for controlling engine torque, and method for preventing the misdiagnosis of knocking Download PDF

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Publication number
WO2012099349A2
WO2012099349A2 PCT/KR2012/000068 KR2012000068W WO2012099349A2 WO 2012099349 A2 WO2012099349 A2 WO 2012099349A2 KR 2012000068 W KR2012000068 W KR 2012000068W WO 2012099349 A2 WO2012099349 A2 WO 2012099349A2
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WO
WIPO (PCT)
Prior art keywords
engine
torque
gear shift
output torque
knocking
Prior art date
Application number
PCT/KR2012/000068
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French (fr)
Korean (ko)
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WO2012099349A3 (en
Inventor
권윤성
Original Assignee
콘티넨탈 오토모티브 시스템 주식회사
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Priority to KR1020110005953A priority Critical patent/KR101801124B1/en
Priority to KR10-2011-0005953 priority
Application filed by 콘티넨탈 오토모티브 시스템 주식회사 filed Critical 콘티넨탈 오토모티브 시스템 주식회사
Publication of WO2012099349A2 publication Critical patent/WO2012099349A2/en
Publication of WO2012099349A3 publication Critical patent/WO2012099349A3/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D45/00Electrical control not provided for in groups F02D41/00 - F02D43/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D35/00Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • 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
    • F02D41/021Introducing corrections for particular conditions exterior to the engine
    • F02D41/0215Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
    • F02D41/023Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio shifting
    • 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
    • F02D41/22Safety or indicating devices for abnormal conditions

Abstract

The present invention relates to an apparatus for controlling engine torque, and to a method for preventing the misdiagnosis of knocking. According to the apparatus for controlling engine torque and the method, when a gear is manually changed in an automatic-transmission vehicle, a misdiagnosis of knocking due to a sudden rise in torque may be effectively prevented to reduce torque loss and improve drivability which might otherwise be diminished by an unnecessary loss of torque. In the method for controlling engine torque to prevent the misdiagnosis of knocking, when a preset specific manual gear transmission condition occurs, an output torque from the engine is reduced to correspond to the preset specific manual gear transmission condition. When the gear transmission according to the occurrence of the specific manual gear transmission condition is completed, the output torque from the engine is restored. When the output torque from the engine is restored, a knocking occurrence diagnosis for the engine is stopped for a preset control time. Alternatively, when the gear transmission according to the occurrence of the specific manual gear transmission condition is completed, the output torque of the engine is sequentially restored according to a restoration speed corresponding to a reduction value of the reduced output torque on the basis of a previously defined torque restoration plan.

Description

Engine torque control device and method for preventing knocking diagnosis

The present invention relates to an engine torque control apparatus and method for preventing knocking misdiagnosis. More particularly, torque loss can be reduced by effectively preventing knocking misdiagnosis due to rapid torque rise when changing gears manually in an automatic transmission vehicle. The present invention relates to an engine torque control apparatus and method for preventing knocking diagnosis which can improve the operability felt by unnecessary torque loss.

In general, in the case of an automatic transmission vehicle, an engine control unit (ECU) and a transmission control unit (TCU) for controlling the engine and the transmission, respectively, are controlled in the best state to suit the characteristics of the engine and the transmission, respectively. This automatic transmission vehicle, through communication between the engine control unit (ECU) and the transmission control unit (TCU), based on the engine output torque generated from the engine has a clutch pattern in accordance with the corresponding mode automatically performs a gear shift It is configured to give optimum efficiency.

In such automatic transmission vehicles, there is a manual mode that allows the driver to freely shift gears regardless of the vehicle status (eg, engine speed, throttle, etc.). Thus, the gear shift in such a manual is not a case where the gear shift is optimized at the gear shift.

Thus, with reference to Figure 1 will be described the process of the gear shift in the manual in a typical automatic transmission vehicle.

As shown in FIG. 1, when the driver freely changes the gear in the manual (for example, from 2nd to 3rd) at time t1, the ignition angle (c) is delayed / retarded for transmission protection according to the gear shift. The engine torque, that is, the engine speed b is reduced, and the ignition angle c is restored at the time t2 when the gear shift is completed, thereby restoring the engine torque, that is, the engine speed b.

At this time, the engine control unit (ECU) is often misdiagnosed as knocking of the engine shock caused by the rapid recovery / rise of the engine torque at the time t2 when the gear shift is completed.

When the knocking misdiagnosis occurs as described above, the engine control unit ECU further delays the ignition angle b due to knocking as shown in b of FIG. 1 separately from the restoration of the ignition angle c due to the gear shift in the manual state. By perception, this results in a loss of engine torque, resulting in a deterioration in the feel of operability felt.

The present invention has been made in view of the above circumstances, and an object of the present invention is to achieve a specific manual gear shift condition when a predetermined manual gear shift condition occurs, correspondingly to reduce the output torque of the engine, and the specific manual gear shift condition. Restoring the output torque of the engine when the gear shift is completed according to the occurrence and stopping the diagnosis of knocking occurrence of the engine for a preset control time when restoring the output torque of the engine, or completing the gear shift according to the occurrence of a specific manual gear shift condition. Providing an engine torque control apparatus and method for preventing knocking misdiagnosis to sequentially restore the output torque of the engine in accordance with a restoration speed corresponding to the reduced value of the reduced output torque based on a predefined torque restoration policy. Torque rise when shifting gears manually from automatic transmission vehicle Effectively prevents knocking diagnosis due to

According to an aspect of the present invention, there is provided a method of controlling engine torque for preventing knocking misdiagnosis, comprising: determining whether a preset specific manual gear shift condition occurs; A torque reduction step of reducing an output torque of the engine when the specific manual gear shift condition occurs; A torque restoring step of restoring an output torque of the engine when the gear shift is completed according to the occurrence of the specific manual gear shift condition; And a knocking diagnosis stopping step of stopping diagnosis of knocking of the engine for a preset control time when restoring the output torque of the engine.

Preferably, the torque reduction step, it is possible to reduce the output torque of the engine by delaying the ignition angle (Ignition Angle) for controlling the ignition of the engine corresponding to the specific manual gear shift condition.

Preferably, the torque restoring step may restore the delayed ignition angle, thereby restoring the output torque of the engine.

According to a second aspect of the present invention, an engine torque control method for preventing knocking diagnosis may include determining whether a preset specific manual gear shift condition occurs; A torque reduction step of reducing an output torque of the engine when the specific manual gear shift condition occurs; And a torque for sequentially restoring the output torque of the engine according to a restoration speed corresponding to the reduced value of the reduced output torque based on a predefined torque restoration policy when the gear shift is completed according to the specific manual gear shift condition. A restoration step.

Preferably, the torque reduction step, it is possible to reduce the output torque of the engine by delaying the ignition angle (Ignition Angle) for controlling the ignition of the engine corresponding to the specific manual gear shift condition.

Preferably, the torque restoring step includes a restoration time corresponding to the delayed ignition angle corresponding to the reduction value of the output torque, based on the torque restoration policy indicating a restoration time set to restore the output torque for each predetermined reduction value. While sequentially restoring, thereby restoring the output torque of the engine.

According to a third aspect of the present invention, there is provided an engine torque control apparatus for preventing knocking misdiagnosis, including: a determination unit configured to determine whether a predetermined specific manual gear shift condition occurs; And an output torque reduction unit for reducing the output torque of the engine when the specific manual gear shift condition occurs, and output torque for restoring the output torque of the engine when the gear shift is completed according to the occurrence of the specific manual gear shift condition. A restoring unit includes a control unit including a knocking diagnosis control unit for stopping a diagnosis of knocking occurrence of a knocking diagnosis unit for diagnosing a knocking state for the engine during a preset control time when restoring the output torque of the engine.

According to a fourth aspect of the present invention for achieving the above object, an engine torque control apparatus for preventing knocking diagnosis may include: a determining unit configured to determine whether a preset specific manual gear shift condition occurs; And an output torque reduction unit for reducing the output torque of the engine when the specific manual gear shift condition occurs, and based on a torque recovery policy defined upon completion of the gear shift according to the occurrence of the specific manual gear shift condition. And a control unit having an output torque restoring unit for sequentially restoring the output torque of the engine in accordance with a restoration speed corresponding to the reduced value of the reduced output torque.

Therefore, according to the engine torque control apparatus and method for preventing knocking and misdiagnosis of the present invention, as the gear is manually changed in the automatic transmission vehicle, the engine output torque is temporarily reduced and then the engine is controlled for a predetermined control time during restoration. By stopping the knocking diagnosis or temporarily restoring the output torque of the engine and then gradually restoring the reduced output torque, it is possible to effectively prevent knocking misdiagnosis due to a sudden torque rise during manual gear change in an automatic transmission vehicle.

Therefore, according to the engine torque control device and method for preventing knocking misdiagnosis of the present invention, it is possible to effectively reduce the torque loss by effectively preventing knocking misdiagnosis caused by a sudden torque rise when changing gears manually in an automatic transmission vehicle, and unnecessary torque It can improve the operability felt by the loss.

1 is an exemplary view showing a process of shifting gears manually in a general automatic transmission vehicle.

2 is a block diagram illustrating an engine torque control apparatus for preventing knocking and misdiagnosing according to a first embodiment of the present invention.

3 is a block diagram illustrating an engine torque control apparatus for preventing knocking and misdiagnosing according to a second preferred embodiment of the present invention.

4 is a flowchart illustrating an engine torque control flow for preventing knocking diagnosis according to a first preferred embodiment of the present invention.

5 is a flowchart illustrating an engine torque control flow for preventing knocking diagnosis according to a second preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

2 is a diagram illustrating an engine torque control apparatus for preventing knocking and misdiagnosing according to a first embodiment of the present invention.

As shown in FIG. 2, a vehicle system including an engine torque control device 60 for preventing knocking diagnosis according to the present invention includes an engine 10, a transmission 20, a wheel 30, and a knocking diagnosis unit. 50 and the engine torque control device 60 of the present invention.

The engine 10 is a device that generates fuel as a driving force by burning fuel in a cylinder, and includes a cylinder in which fuel is injected and ignited, a piston, a crank, and the like, which are moved by fuel ignition in the cylinder. do.

The transmission 20 is a device for shifting gears in accordance with manual operation from a driver. That is, the transmission 20 converts the output torque of the engine 10, that is, the rotational force corresponding to the rotational output, and transmits the converted torque (rotational force) to the wheel 30.

The transmission 20 provides the engine torque corresponding to the output torque according to the rotational output of the engine 10 in transmitting the torque (rotational force) shifted corresponding to the output torque according to the rotational output of the engine 10. The torque (rotational force) transmitted to the wheel 30 in accordance with manual operation from the driver may be varied, or may provide a preset allowable torque. To this end, the transmission 20 is configured by coupling between independent driving bodies so as to output different torques (rotational power) in response to the output torque inputted to the combination between the driving bodies interlocked among the independent driving bodies. Therefore, it is preferable that it is a structure which can generate a torque (rotation force) variably.

In addition, the above-described transmission 20 is preferably an automatic transmission device.

When the preset specific manual gear shift condition occurs, the engine torque control device 60 reduces the output torque of the engine 10 in response to the preset manual gear shift condition, and the engine 10 when the gear shift is completed according to the occurrence of the specific manual gear shift condition. Restoring the output torque of the engine, stops the diagnosis of the knocking occurrence of the knocking diagnosis unit 50 for diagnosing the knocking state for the engine 10 during the restoration of the output torque of the engine 10 for a predetermined control time.

Here, the knocking diagnosis unit 50 may include a rotation speed detection sensor (not shown) for detecting the rotation speed of the engine 10 and a knock sensor (not shown) for detecting vibration of the cylinder block due to knocking of the engine 10. ) And diagnosis of knocking by executing a specific predetermined determination program based on output signals from sensors such as an intake air temperature sensor (not shown) which detects an intake temperature of the engine 10 and outputs an electrical signal. The knocking state can be diagnosed by performing.

The knocking diagnosis unit 50 may adopt various existing knocking state diagnosis methods, and will continuously provide the corresponding function unit (eg, ECU) that requires the knocking state diagnosis result.

Hereinafter, the engine torque control device 60 according to the present invention will be described in more detail.

The engine torque control device 60 according to the present invention includes a determination unit 63 for determining whether a predetermined manual gear shift condition occurs and an engine 10 in response to a specific manual gear shift condition. An output torque reduction unit for reducing output torque of the engine, an output torque restoring unit for restoring the output torque of the engine 10 when the gear shift is completed according to a specific manual gear shift condition, and an engine 10 for restoring the output torque of the engine 10. The control unit 66 includes a knocking diagnosis control unit for stopping the diagnosis of the knocking occurrence of the knocking diagnosis unit 50 for diagnosing the knocking state for a predetermined control time.

The determination unit 63 determines whether a specific manual gear shift condition occurs.

That is, the determination unit 63 performs the function of determining whether or not a manual gear shift condition is issued as the driver manually changes the gear in the automatic transmission 20. Here, the manual mode is a mode that allows the driver to freely shift the gear freely regardless of the vehicle status (eg, engine speed, throttle, etc.), and the gear shift in the manual is optimized for gear shifting. This is not the case.

For example, in general, when the driver manually changes the gear in the manual mode, the driver 20 protects the transmission 20 from the transmission control unit (TCU) or the brake locking device (ABS) that controls the gear shift of the transmission 20. Torque reduction is required.

Accordingly, the determination unit 63 receives a request for torque reduction in accordance with manual gear change in the manual from the transmission control unit (TCU) or the anti-lock braking system. By recognizing the occurrence of the manual gear shift condition can be determined.

The controller 66 reduces the output torque of the engine 10 when a specific manual gear shift condition occurs, and restores the output torque of the engine 10 when the gear shift is completed according to the occurrence of the specific manual gear shift condition. Let's do it.

That is, when it is determined that the specific manual gear shift condition occurs as a result of the determination by the determination unit 63, the control unit 66 generates / recognizes an ignition angle that controls the ignition of the engine 10. By delaying in response to the gear shift condition, the output torque of the engine 10 can be reduced.

The controller 66 may restore the delayed ignition angle when the gear shift is completed according to the specific manual gear shift condition generated / recognized this time, thereby restoring the output torque of the engine 10.

In other words, when the gear shift is generally completed by the driver changing the gear manually in the manual mode, restoring the torque reduction for the transmission 20 from the transmission control unit (TCU) or the brake antilock device (ABS). Torque recovery is requested.

Accordingly, the controller 66, when a torque restoration request is received from the transmission control unit (TCU) or the brake lock prevention device (ABS), recognizes that the gear shift is completed according to a specific manual gear shift condition that has been generated / recognized this time, By restoring the delayed ignition angle, the output torque of the engine 10 can be restored.

When the output torque of the engine 10 is restored as described above, the controller 66 stops the diagnosis of the knocking occurrence of the knocking diagnosis unit 50 for diagnosing the knocking state for the engine 10 for a preset control time. .

That is, the controller 66 restores the output torque of the engine 10 according to the completion of the gear shift according to the specific manual gear shift condition generated / recognized this time, or the gear according to the specific manual gear shift condition generated / recognized this time. When the shift is completed, the knocking diagnosis of the knocking diagnosis unit 50 may be stopped for a predetermined control time (for example, 2 seconds).

For example, the controller 66 may disable the operation of the knocking diagnosis unit 50 or delay the operation of the knocking diagnosis unit 50 for a preset control time (for example, 2 seconds) or the knocking diagnosis. The diagnosis of knocking occurrence of the knocking diagnosis unit 50 can be stopped by ignoring the output from the unit 50.

On the other hand, the engine torque control device 60 as described above is preferably a configuration included in the engine control unit (ECU) for controlling the engine 10.

The engine control unit ECU controls the fuel injection and ignition so that the driving force of the engine 10 increases according to the acceleration input value when the acceleration input value corresponding to the acceleration input is provided from the acceleration pedal detection sensor (not shown). To control (10). In other words, the engine control unit ECU determines the engine torque value for controlling the engine 10 according to the acceleration input input from the accelerator pedal detection sensor (not shown), and accordingly the driving force of the engine 10. The engine 10 can be controlled such as to control fuel injection and ignition so that this increases. Thus, the output torque from the engine 10 may be provided to the transmission 20.

Thus, in the present invention, the engine torque control device 60 may be included in an engine control unit (ECU) for performing the above functions.

On the other hand, with reference to Figure 3 will be described an engine torque control device for preventing knocking diagnosis according to a second embodiment of the present invention.

As shown in FIG. 3, a vehicle system including an engine torque control device 70 for preventing knocking diagnosis according to another embodiment of the present invention includes an engine 10, a transmission 20, and a wheel 30. It may include the engine torque control device 70 of the present invention.

Here, since the engine 10, the transmission 20, and the wheel 30 are the same as the corresponding components according to the first embodiment described with reference to FIG. 2, detailed description thereof will be omitted.

When a specific manual gear shift condition occurs, the engine torque control device 60 reduces the output torque of the engine 10 in response to the preset manual gear shift condition, and when the gear shift is completed according to the generation of the specific manual gear shift condition, Based on the restoration policy, the output torque of the engine 10 is sequentially restored according to the restoration speed corresponding to the reduced value of the reduced output torque.

Hereinafter, the engine torque control device 70 according to the present invention will be described in more detail.

The engine torque control device 70 according to the present invention includes a determination unit 73 for determining whether a predetermined manual gear shift condition occurs and an engine 10 in response to the specific manual gear shift condition. An output torque reduction unit for reducing the output torque of the engine, and the engine 10 according to the restoration speed corresponding to the reduced value of the reduced output torque based on a predefined torque restoration policy upon completion of the gear shift caused by a specific manual gear shift condition. And a control unit 66 including an output torque restoring unit for sequentially restoring the output torque of?).

The determination unit 73 determines whether a specific manual gear shift condition occurs.

That is, the determination unit 73 performs a function of determining whether or not the automatic transmission 20 is issued by the manual gear shift condition as the driver manually changes the gear in the manual mode. Here, the manual mode is a mode that allows the driver to freely shift the gear freely regardless of the vehicle status (eg, engine speed, throttle, etc.), and the gear shift in the manual is optimized for gear shifting. This is not the case.

For example, in general, when the driver manually changes the gear in the manual mode, the driver 20 protects the transmission 20 from the transmission control unit (TCU) or the brake locking device (ABS) that controls the gear shift of the transmission 20. Torque reduction is required.

Accordingly, the determination unit 73 receives a request for torque reduction in accordance with manual gear change in the manual from the transmission control unit (TCU) or the anti-lock braking system (TCU). By recognizing the occurrence of the manual gear shift condition can be determined.

If a specific manual gear shift condition occurs, the controller 76 reduces the output torque of the engine 10 in response to the occurrence of a specific manual gear shift condition, and based on the torque restoration policy defined when the gear shift is completed according to the specific manual gear shift condition. The output torque of the engine 10 is sequentially restored in accordance with the restoration speed corresponding to the reduction value of the previously reduced output torque.

That is, when it is determined that the specific manual gear shift condition occurs as a result of the determination by the determination unit 73, the control unit 76 generates / recognizes an ignition angle (Ignition Angle) that controls the ignition of the engine 10 this time. By delaying in response to the gear shift condition, the output torque of the engine 10 can be reduced.

Then, the control unit 76, the ignition delayed previously based on the torque recovery policy indicating the set recovery time for restoring the output torque for each predetermined reduction value when the gear shift is completed according to the specific manual gear shift condition generated / recognized this time The angle may be sequentially restored during the restoration time corresponding to the reduction value of the output torque, thereby restoring the output torque of the engine 10.

In other words, when the gear shift is generally completed by the driver changing the gear manually in the manual mode, restoring the torque reduction for the transmission 20 from the transmission control unit (TCU) or the brake antilock device (ABS). Torque recovery is requested.

Here, the torque restoration policy may indicate a set restoring time for restoring the output torque for each preset reduction value. For example, the torque restoring policy is 2 seconds of restoration time and 30% of output torque in response to reduction 1 of 70% of output torque and 2 of reduction of 50% of output torque. In response to the reduced value 3 reduced, the restoration time may include 1.5 seconds or the like.

Accordingly, when the torque restoration request is received from the transmission control unit (TCU) or the brake lock prevention device (ABS), the controller 76 may recognize that the gear shift is completed according to a specific manual gear shift condition that has been generated / recognized this time. .

Upon recognizing the completion of the gear shifting according to the specific manual gear shifting condition as described above, the control unit 76 based on the torque restoring policy described above, the restoring time corresponding to the reduction value of the output torque (for example, 50%) (for example, 2). Second) to sequentially restore the ignition angle previously delayed, thereby restoring the output torque of the engine 10.

That is, the controller 76 does not suddenly restore the previously delayed ignition angle, but gradually increases the delayed ignition angle during the restoration time (for example, 2 seconds) so that the ignition angle after the restoration time (for example, 2 seconds) has elapsed. As a result, the output torque of the engine 10 can be gradually restored according to the restoration speed corresponding to the reduction value of the output torque.

On the other hand, the engine torque control device 70 as described above is preferably a configuration included in the engine control unit (ECU) as mentioned in the first embodiment.

As described above, the engine torque control apparatus for preventing knocking diagnosis according to the present invention, by changing the gear manually in an automatic transmission vehicle, temporarily reduces the output torque of the engine and then supplies the engine for a predetermined control time during restoration. By stopping the diagnosis of knocking or stopping the engine's output torque temporarily and then gradually restoring the reduced output torque, it is possible to effectively prevent the knocking diagnosis due to the sudden torque rise when changing the gear manually in the automatic transmission vehicle. .

Hereinafter, an engine torque control method for preventing knocking diagnosis according to the present invention will be described with reference to FIGS. 4 and 5. Here, for the convenience of description, the configuration shown in FIGS. 1 and 2 described above will be described with reference to the corresponding reference numerals.

First, an engine torque control method for preventing knocking diagnosis according to a first embodiment of the present invention will be described with reference to FIG. 4.

In the engine torque control method for preventing knocking and misdiagnosis according to the present invention, it is determined whether a predetermined specific manual gear shift condition occurs (S100).

That is, the engine torque control method for preventing knocking and misdiagnosis according to the present invention performs a function of determining whether a manual gear shift condition is issued when the driver changes the gear manually in the manual mode in the automatic transmission 20. do. Here, the manual mode is a mode that allows the driver to freely shift the gear freely regardless of the vehicle status (eg, engine speed, throttle, etc.), and the gear shift in the manual is optimized for gear shifting. This is not the case.

For example, in general, when the driver changes gears manually in the manual mode, the transmission 20 is protected from the transmission control unit (TCU) or the brake lock preventing device (ABS) that controls the gear shift of the transmission 20. Torque reduction is required.

Accordingly, in the engine torque control method for preventing knocking diagnosis according to the present invention, a torque reduction request according to a manual gear change in a manual is received from a transmission control unit (TCU) or an anti-lock braking system. In this case, it is possible to determine whether a manual gear shift condition occurs by recognizing that a specific manual gear shift condition occurs.

When a specific manual gear shift condition occurs as a result of the determination in step S100, the engine torque control method for preventing knocking and misdiagnosis according to the present invention reduces the output torque of the engine 10 in response to the specific manual gear shift condition. The output torque of the engine 10 is restored when the gear shift is completed.

That is, in the engine torque control method for preventing knocking diagnosis according to the present invention, when it is recognized that a specific manual gear shift condition occurs, an ignition angle for controlling the ignition of the engine 10 is generated / recognized this time. The output torque of the engine 10 can be reduced by delaying corresponding to the specific manual gear shift condition (S110).

In addition, the engine torque control method for preventing knocking and misdiagnosis according to the present invention, when the gear shift is completed according to the specific manual gear shift condition generated / recognized this time (S120), restores the delayed ignition angle accordingly the engine 10 It is possible to restore the output torque of (S130).

In other words, when the gear shift is generally completed by the driver changing the gear manually in the manual mode, restoring the torque reduction for the transmission 20 from the transmission control unit (TCU) or the brake antilock device (ABS). Torque recovery is requested.

Therefore, in the engine torque control method for preventing knocking diagnosis according to the present invention, when a torque restoration request is received from a transmission control unit (TCU) or a brake lock prevention device (ABS), a specific manual gear shift condition that is generated / recognized this time is received. Recognizing that the gear shift is completed according to, and by restoring the ignition angle previously delayed it is possible to restore the output torque of the engine (10).

When the output torque of the engine 10 is restored as described above, the engine torque control method for preventing knocking diagnosis according to the present invention includes a diagnosis of knocking occurrence of the knocking diagnosis unit 50 for diagnosing a knocking state for the engine 10. To stop for a predetermined control time (S140).

In other words, the engine torque control method for preventing knocking misdiagnosis according to the present invention is generated after restoring the output torque of the engine 10 according to the gear shift completion according to the specific manual gear shift condition generated / recognized this time. When the gear shift is completed according to the recognized manual gear shift condition, the diagnosis of knocking of the knocking diagnosis unit 50 may be stopped for a preset control time (for example, 2 seconds).

For example, in the engine torque control method for preventing knocking diagnosis according to the present invention, the operation of the knocking diagnosis unit 50 is disabled or the knocking diagnosis unit 50 for a preset control time (for example, 2 seconds). The knocking diagnosis of the knocking diagnosis unit 50 can be interrupted by delaying the operation of () or ignoring the output from the knocking diagnosis unit 50.

In this way, after stopping the knock diagnosis, the engine torque control method for preventing knocking diagnosis according to the present invention, when it is determined that the corresponding control time (for example, 2 seconds) elapses (S150), knocking of the knocking diagnosis unit 50 The normal driving operation may be performed by performing the state diagnosis normally (S160).

Hereinafter, an engine torque control method for preventing knocking diagnosis according to a twelfth embodiment of the present invention will be described with reference to FIG. 5.

In the engine torque control method for preventing knocking and misdiagnosis according to the present invention, it is determined whether a predetermined specific manual gear shift condition occurs (S200).

That is, the engine torque control method for preventing knocking and misdiagnosis according to the present invention performs a function of determining whether a manual gear shift condition is issued when the driver changes the gear manually in the manual mode in the automatic transmission 20. do. Here, the manual mode is a mode that allows the driver to freely shift the gear freely regardless of the vehicle status (eg, engine speed, throttle, etc.), and the gear shift in the manual is optimized for gear shifting. This is not the case.

For example, in general, when the driver changes gears manually in the manual mode, the transmission 20 is protected from the transmission control unit (TCU) or the brake lock preventing device (ABS) that controls the gear shift of the transmission 20. Torque reduction is required.

Accordingly, in the engine torque control method for preventing knocking diagnosis according to the present invention, a torque reduction request according to a manual gear change in a manual is received from a transmission control unit (TCU) or an anti-lock braking system. In this case, it is possible to determine whether a manual gear shift condition occurs by recognizing that a specific manual gear shift condition occurs.

When a specific manual gear shift condition occurs as a result of the determination in step S200, the engine torque control method for preventing knocking and misdiagnosis according to the present invention reduces the output torque of the engine 10 correspondingly.

That is, in the engine torque control method for preventing knocking diagnosis according to the present invention, when it is recognized that a specific manual gear shift condition occurs, an ignition angle for controlling the ignition of the engine 10 is generated / recognized this time. By delaying in response to a specific manual gear shift condition, the output torque of the engine 10 can be reduced (S210).

In addition, the engine torque control method for preventing knocking diagnosis according to the present invention, when the gear shift is completed according to the specific manual gear shift condition (S220), the reduction of the output torque previously reduced based on the predefined torque recovery policy The output torque of the engine 10 is sequentially restored according to the restoration speed corresponding to the value (S230).

That is, the engine torque control method for preventing knocking misdiagnosis according to the present invention, when the gear shift is completed according to the specific manual gear shift condition generated / recognized this time, the restoration time set to restore the output torque for each preset reduction value Based on the torque restoring policy, the previously delayed ignition angle may be sequentially restored during the restoration time corresponding to the reduction value of the output torque, thereby restoring the output torque of the engine 10.

In other words, when the gear shift is generally completed by the driver changing the gear manually in the manual mode, restoring the torque reduction for the transmission 20 from the transmission control unit (TCU) or the brake antilock device (ABS). Torque recovery is requested.

Here, the torque restoration policy may indicate a set restoring time for restoring the output torque for each preset reduction value. For example, the torque restoring policy is 2 seconds of restoration time and 30% of output torque in response to reduction 1 of 70% of output torque and 2 of reduction of 50% of output torque. In response to the reduced value 3 reduced, the restoration time may include 1.5 seconds or the like.

Therefore, in the engine torque control method for preventing knocking diagnosis according to the present invention, when a torque restoration request is received from a transmission control unit (TCU) or a brake lock prevention device (ABS), a specific manual gear shift condition that is generated / recognized this time is received. It can be recognized as the completion of gear shift.

In this way, when it is recognized that the gear shift is completed according to the specific manual gear shift condition, the engine torque control method for preventing knocking error diagnosis according to the present invention is based on the torque restoration policy described above. The previously delayed ignition angle may be sequentially restored during the restoration time (eg, 2 seconds) corresponding to%), thereby restoring the output torque of the engine 10.

That is, in the engine torque control method for preventing knocking diagnosis according to the present invention, the restoration time is increased by gradually increasing the delayed ignition angle for a restoration time (for example, 2 seconds) without suddenly restoring the ignition angle previously delayed. Example: 2 seconds) After the ignition angle is finally restored, the output torque of the engine 10 can be gradually restored according to the restoration speed corresponding to the reduction value of the output torque.

As described above, after slowly restoring the output torque of the engine 10, the engine torque control method for preventing knocking and misdiagnosis according to the present invention will proceed with a general driving operation (S240).

Therefore, in the engine torque control method for preventing knocking diagnosis according to the present invention as described above, by changing the gear manually in the automatic transmission vehicle, the engine output torque is temporarily reduced after restoring the engine for a predetermined control time during restoration By stopping the knocking diagnosis for the engine or temporarily reducing the output torque of the engine and then gradually restoring the reduced output torque, it is possible to effectively prevent the knocking diagnosis due to the sudden torque rise when changing the gear manually in the automatic transmission vehicle. .

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

As the gear is changed manually in the automatic transmission vehicle, the output torque of the engine is temporarily reduced and then the knocking diagnosis for the engine is stopped for a predetermined control time during restoration, or the output torque reduced after the engine torque is temporarily reduced. By gradually restoring the engine, when the engine torque control device and method for preventing knocking diagnosis is effectively prevented, which prevents the knocking error due to the sudden torque rise during manual gear change, the torque loss is reduced, the driving performance is improved, and the driver's satisfaction This can lead to very large advances in the market and the possibility of commercial or sales of the vehicle being applied is not only sufficient, but also practically evident.

Claims (8)

  1. In the engine torque control method for preventing knocking diagnosis,
    Determining whether a preset specific manual gear shift condition occurs;
    A torque reduction step of reducing an output torque of the engine when the specific manual gear shift condition occurs;
    A torque restoring step of restoring an output torque of the engine when the gear shift is completed according to the occurrence of the specific manual gear shift condition; And
    And a knocking diagnosis stopping step of stopping diagnosis of knocking of the engine for a preset control time when restoring the output torque of the engine.
  2. The method of claim 1,
    The torque reduction step,
    And an output torque of the engine is reduced by delaying an ignition angle for controlling the ignition of the engine in response to the specific manual gear shift condition.
  3. The method of claim 2,
    The torque restoration step,
    Restoring the delayed ignition angle and restoring the output torque of the engine according to the engine torque control method.
  4. In the engine torque control method for preventing knocking diagnosis,
    Determining whether a preset specific manual gear shift condition occurs;
    A torque reduction step of reducing an output torque of the engine when the specific manual gear shift condition occurs; And
    Upon completion of the gear shift according to the occurrence of the specific manual gear shift condition, the torque restoration sequentially restores the output torque of the engine according to the restoration speed corresponding to the reduced value of the reduced output torque based on a predefined torque restoration policy. Engine torque control method for preventing knocking diagnosis, characterized in that it comprises a step.
  5. The method of claim 4, wherein
    The torque reduction step,
    And an output torque of the engine is reduced by delaying an ignition angle for controlling the ignition of the engine in response to the specific manual gear shift condition.
  6. The method of claim 5,
    The torque restoration step,
    The delayed ignition angle is sequentially restored during the restoration time corresponding to the reduction value of the output torque based on the torque restoration policy indicating the restoration time set to restore the output torque for each preset reduction value. Engine torque control method for preventing knocking diagnosis, characterized in that to restore the output torque.
  7. In the engine torque control device for preventing knocking diagnosis,
    Determination unit for determining whether a predetermined specific manual gear shift condition occurs; And
    An output torque reduction unit for reducing the output torque of the engine when the specific manual gear shift condition occurs; restoring the output torque of the engine when the gear shift is completed according to the occurrence of the specific manual gear shift condition; And a control unit including a knocking diagnosis control unit for stopping a diagnosis of knocking occurrence of a knocking diagnosis unit for diagnosing a knocking state of the engine during a preset control time when restoring the output torque of the engine. Engine torque control for diagnostic prevention.
  8. In the engine torque control device for preventing knocking diagnosis,
    Determination unit for determining whether a predetermined specific manual gear shift condition occurs; And
    An output torque reduction unit for reducing the output torque of the engine in response to the specific manual gear shift condition when the specific manual gear shift condition occurs; and on the basis of the torque restoration policy defined upon completion of the gear shift according to the occurrence of the specific manual gear shift condition And a control unit including an output torque restoring unit for sequentially restoring the output torque of the engine in accordance with a restoration speed corresponding to a reduced value of the output torque.
PCT/KR2012/000068 2011-01-20 2012-01-04 Apparatus for controlling engine torque, and method for preventing the misdiagnosis of knocking WO2012099349A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020110005953A KR101801124B1 (en) 2011-01-20 2011-01-20 Engine torque control apparatus and method for prevention of noking wrong-diagnosis
KR10-2011-0005953 2011-01-20

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05229370A (en) * 1991-08-22 1993-09-07 Siemens Ag Controller for automobile driving device having automatic transmission
JPH09264418A (en) * 1996-03-29 1997-10-07 Mazda Motor Corp Control device for automatic transmission
JP2004108168A (en) * 2002-09-13 2004-04-08 Toyota Motor Corp Device for controlling torque loss when downshifting
JP2008045457A (en) * 2006-08-11 2008-02-28 Toyota Motor Corp Output control device for internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05229370A (en) * 1991-08-22 1993-09-07 Siemens Ag Controller for automobile driving device having automatic transmission
JPH09264418A (en) * 1996-03-29 1997-10-07 Mazda Motor Corp Control device for automatic transmission
JP2004108168A (en) * 2002-09-13 2004-04-08 Toyota Motor Corp Device for controlling torque loss when downshifting
JP2008045457A (en) * 2006-08-11 2008-02-28 Toyota Motor Corp Output control device for internal combustion engine

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KR101801124B1 (en) 2017-11-24
KR20120084532A (en) 2012-07-30

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