KR101793078B1 - Method for error detecting of synchronization set-up for engine of car without cam sensor - Google Patents

Method for error detecting of synchronization set-up for engine of car without cam sensor Download PDF

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Publication number
KR101793078B1
KR101793078B1 KR1020110146617A KR20110146617A KR101793078B1 KR 101793078 B1 KR101793078 B1 KR 101793078B1 KR 1020110146617 A KR1020110146617 A KR 1020110146617A KR 20110146617 A KR20110146617 A KR 20110146617A KR 101793078 B1 KR101793078 B1 KR 101793078B1
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South Korea
Prior art keywords
signal
phase signal
cylinder
engine
engine synchronization
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KR1020110146617A
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Korean (ko)
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KR20130077943A (en
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차순호
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콘티넨탈 오토모티브 시스템 주식회사
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Priority to KR1020110146617A priority Critical patent/KR101793078B1/en
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

The present invention discloses an error detection method of a vehicle engine synchronization setting without a cam sensor. An error detection method of a vehicle engine synchronization setting without a cam sensor according to the present invention is an error detection method of a vehicle engine synchronization setting without a cam sensor in which an ignition coil corresponding to a specific cylinder among a plurality of cylinders (I.e., a phase signal) generated at the time of combustion operation of the cylinder, and sets the engine synchronization reference point by comparing the received specific signal (i.e., the phase signal) with the crank signal, And verifying whether or not an error with respect to the signal is based on a predetermined phase signal level determination table. Therefore, according to the present invention, even if there is no cam sensor, each cylinder stroke of the vehicle engine can be determined to perform synchronization of the vehicle engine, as well as a verification process for a phase signal that replaces the cam signal, The occurrence can be minimized.

Description

Technical Field [0001] The present invention relates to a method of detecting an error in a vehicle engine synchronization setting without a cam sensor,

The present invention relates to a method of detecting an error in a vehicle engine synchronization without a cam sensor, and more particularly, to a method and a system for determining a cylinder stroke of a vehicle engine in the absence of a cam sensor, The present invention relates to an error detection method of a vehicle engine synchronization setting in which there is no cam sensor for verifying whether or not an error of a phase signal that replaces a phase signal is present.

2. Description of the Related Art Generally, a conventional engine ignition apparatus includes a sensing unit for sensing a sensing signal used as basic information for controlling an ignition timing of an engine, an ignition timing control unit for calculating an engine load (A / N) An ignition part for igniting the mixer by generating a spark by a supplied current after supplying an electric current to the ignition coil in accordance with an output signal of the electronic control device.

Here, the sensing unit includes a crank sensor, a cam sensor, a water temperature sensor, and an intake air flow meter.

The electronic control unit measures the engine speed by the sensing signal of the crank sensor and measures the air amount using the intake air flow meter. Then, the ratio between the air amount A and the engine speed N, that is, the engine load A / N), calculates an optimal ignition timing using the result, and supplies an ignition signal having the optimum ignition timing to the ignition section.

That is, the sensing unit is installed on the crankshaft and the camshaft in order to sense the sensing signal required for determining the ignition timing, and the crank sensor of the sensing unit detects a crank signal in the form of a waveform corresponding to the number of teeth of the trigger wheel provided on the entire surface of the crankshaft And the cam sensor of the sensing portion outputs a cam signal in the form of a waveform which is sensed around the protruding portion of the cam.

Therefore, when the camshaft is sensed once, the crankshaft rotates twice, and when the piston connected to the connecting rod of the crankshaft is subjected to four strokes, the engine synchronization reference point (for example, top dead center) appears at the time of compression and exhaust stroke.

That is, engine synchronization is set based on the waveform of the cam signal and the waveform of the crank signal at the time of engine startup, and the stroke of each cylinder is determined and the calculated ignition signal is supplied.

However, when the cam sensor is not provided in the vehicle engine, it is impossible to secure the cam signal among the signals for determining the ignition timing of the engine due to the absence of the cam sensor, so that it is impossible to determine the ignition timing of the engine Problems such as startup delay and exhaust gas increase occur.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and an object of the present invention is to provide an electronic control apparatus for performing synchronization of a vehicle engine by determining each cylinder stroke of the engine, By setting the engine synchronization reference point by comparing the specific signal (that is, the phase signal) received after receiving the specific signal (i.e., the phase signal) generated during the combustion operation of the specific cylinder from the coil with the crank signal, In the absence of a cam sensor, determining each cylinder stroke of the vehicle engine to perform synchronization of the vehicle engine, and determining the respective cylinder stroke of the vehicle engine in the absence of the cam sensor to implement synchronization of the vehicle engine, The error of the phase signal instead of the cam signal to be applied to the phase signal is verified based on the predetermined phase signal level determination table The present invention provides a method of detecting an error in a vehicle engine synchronization without a cam sensor.

According to an aspect of the present invention, there is provided an error detection method for a vehicle engine synchronization without a cam sensor according to an aspect of the present invention, in which, when an electronic control unit receives a crank signal from a crank sensor and burns any one of a plurality of cylinders A synchronous setting step of receiving a phase signal from the ignition coil corresponding to the specific cylinder and executing engine synchronization setting based on the crank signal or the crank signal and the phase signal; A first verification step of executing error detection logic to verify whether the phase signal is included in a period between long teeth of the crank signal if the first toot count is set to be set by combustion of the crank signal, A first counting step of incrementing the error occurrence count by one if the phase signal is not included, If the error count is above a predetermined threshold characterized in that it comprises a first determination step of outputting the judgment result is judged as an error for the synchronous engine setting.

Preferably, the error detection method of the vehicle engine synchronization setting without the cam sensor is characterized in that, when the engine synchronization reference point of the engine synchronization setting is set to a second toot count set by the combustion of the other cylinders except the specific cylinder A second verification step of executing the error detection logic to verify that the phase signal is not included in the interval between the long teeth of the crank signal, and if the phase signal includes the verification result, And a second determining step of determining an error for the engine synchronization setting and outputting a determination result if the error occurrence count is equal to or greater than a predetermined threshold value.

Preferably, the synchronization setting step includes a receiving step of receiving the crank signal and receiving the phase signal from the ignition coil at the time of combustion of the specific cylinder, the crank signal, or the crank signal and the phase signal Starting the engine synchronization setting by preliminarily executing fuel injection and ignition control for the plurality of cylinders and starting the engine between a first long tooth and a second long tooth interval of the crank signal And setting the engine synchronization reference point based on a result of the determination.

Preferably, the error detection method of the vehicle engine synchronization setting without the cam sensor further comprises: when it is determined that the verification of the phase signal is normal, when the first tooth after the second long tooth And executing fuel injection and ignition control on the plurality of cylinders based on the engine synchronization reference point from the first toot.

Preferably, when the plurality of cylinders are four cylinders, the specific cylinder is set to the first cylinder.

Preferably, when the plurality of cylinders are four cylinders, the cylinder other than the specific cylinder is set as the fourth cylinder.

Therefore, in the present invention, in the electronic control apparatus for determining each cylinder stroke of the engine and performing the synchronization of the vehicle engine, the specific signal generated during the combustion operation of the specific cylinder from the ignition coil corresponding to the specific cylinder among the plurality of cylinders (I.e., a phase signal) and a crank signal are compared with each other to set an engine synchronization reference point, and whether or not an error with respect to a phase signal that replaces the cam signal is determined by a predetermined phase signal level determination table It is possible to determine the respective cylinder strokes of the vehicle engine even in the absence of the cam sensor to perform synchronization of the vehicle engine as well as to verify the phase signal in place of the cam signal, There is an advantage that the occurrence of synchronization errors can be minimized.

1 is a diagram showing an embodiment of a vehicle engine synchronizing apparatus according to the present invention,
FIG. 2 is a diagram showing a signal relationship applied to an engine synchronization setting according to an embodiment of the present invention,
FIG. 3 is a view showing another embodiment of the signal relationship applied to the engine synchronization setting according to the present invention;
4 is a diagram showing a signal relationship applied to phase signal error detection according to an embodiment of the present invention, and
5 is a flowchart illustrating an operation of an electronic control unit according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of an error detection method of a vehicle engine synchronization setting without a cam sensor according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a configuration in which an engine ignition timing is synchronized without a cam sensor when an engine having no cam sensor is provided. In addition, in order to synchronize engine ignition timing without a cam sensor, Instead, a specific signal is introduced, which provides a configuration for verifying whether or not an error exists in the specific signal.

First, referring to FIGS. 1 to 3, a description will be made of the above-mentioned 'configuration for synchronizing engine ignition timing without a cam sensor'. Then, referring to FIGS. 4 and 5, We will look at the configuration we want to achieve.

1 is a view showing an embodiment of a vehicle engine synchronizing apparatus according to the present invention. 1, the vehicle engine synchronizing apparatus includes a crank sensor (not shown) for detecting the number of Tooth and Long tooth formed on the outer circumferential surface of the target wheel 200 as a pulse signal, An ignition coil 200 which is a line for supplying a current for the combustion operation of any one of a plurality of cylinders and count information of pulses for each tooth detected from the crank sensor 300, An electronic control device for executing fuel injection and ignition control through an engine synchronization reference point after setting an engine synchronization reference point based on position information of a long tooth and a specific signal transmitted from an ignition coil (100).

Here, the specific signal generated in the ignition coil 200 refers to a signal having a different phase deviation from that of the ignition coil 200 when the current is supplied through the ignition coil 200 connected to a specific cylinder for the stroke of the specific cylinder Phase signal, and refers to this phase signal.

For example, when the number of cylinders provided in the vehicle engine is four cylinders, the above-mentioned specific cylinder can be set as the first cylinder.

During the combustion of the first cylinder, a phase signal is generated through the ignition coil 200 connected to the first cylinder, and the phase signal is transmitted to the electronic control unit 100.

That is, the cam signal (that is, the signal which detects the edge corresponding to the rotation angle of the cam having the half-moon-like structure interlocked with the engine rotation axis) is detected by using the phase signal generated only at the time of combustion of the No. 1 cylinder .

A method of utilizing the phase signal will be described in detail below.

The vehicle engine synchronizing apparatus of the present invention may further include a regulator for storing a level of a phase signal generated when the phase signal is generated.

Here, the level of the phase signal is stored in the regulator as a signal indicating 'high level = 1' when a phase signal is generated, and stored in the regulator as a signal indicating 'low level = 0' do.

FIG. 2 is a diagram showing a signal relationship applied to the engine synchronization setting according to an embodiment of the present invention. 2, the electronic control unit 100 receives a crank signal from the crank sensor 300 and a phase signal due to the combustion of the first cylinder from the ignition coil 200 connected to the first cylinder .

The crank signal represents position information of a long tooth that can detect a section between a first long tooth and a second long tooth.

That is, the electronic control unit 100 can determine the time point corresponding to the interval between the first long tooth and the second long tooth from the received crank signal.

Then, the electronic control unit 100 compares the time point between the determined long tooth and the generation point of the phase signal to calculate the first long tooth and the second long tooth, And whether or not the interval between the phases and the generation period of the phase signal overlap each other.

In other words, if it is determined that the phase signal is generated more than once in the interval between the first long tooth and the second long tooth, the first long tooth and the second tooth It can be determined that the combustion operation of the first cylinder has occurred during the interval between the long teeth and the tooth count at the time of the second long tooth has been set to 60 Can be set.

That is, the electronic control unit 100 determines the engine synchronization reference point (that is, the second long tooth) obtained at the time of the first tooth after the second long tooth The engine synchronization setting for using the tooth count for the first time is set to '60', and the tooth count for the first toot is set to '61' 62, 63, 64 ... " for the Tooth.

3 is a diagram showing a signal relation applied to the engine synchronization setting according to another embodiment of the present invention. 3, the electronic control unit 100 compares the time point between the long tooth and the generation point of the phase signal to calculate the first long tooth and the second tooth, It can be judged that the result of judging whether the interval between the long tooth and the phase signal is overlapped with each other does not overlap each other.

That is, if it is determined that no phase signal has occurred more than once in the interval between the first long tooth and the second long tooth, the first long tooth and the second tooth It can be determined that the combustion operation of the first cylinder has not occurred during the passage between the long teeth, which means that it can be judged that the cylinder process of the fourth cylinder is involved.

Accordingly, it is possible to determine that the stroke process of the four cylinders, which is one example of the present embodiment, is one cycle at the time of passing through the second long tooth. Accordingly, the second long tooth The engine synchronization setting for using the engine synchronization reference point acquired at the time of the first toot coming after the completion of the engine synchronization setting is completed and the tooth count for the first toot is set to '1' The count for the subsequent Tooth is maintained at '2, 3, 4 ...'.

4 is a diagram illustrating a signal relationship applied to phase signal error detection according to an embodiment of the present invention. As shown by way of example only in FIG. 4, the electronic controller 100 verifies whether the phase signal provided from the ignition coil 200 is a normal signal after setting the engine synchronization reference point.

That is, when a plurality of cylinders are assumed to be four cylinders, a phase signal should be generated at the combustion timing of the first cylinder set to a specific cylinder, and this phase signal should be generated between 1 and 60 of the toothed section It shall not occur between times 61 and 120 of the Tooth section.

Therefore, referring to FIG. 4, it can be seen that the phase signal is located between 61 and 120 of the crank toothed section. In this case, since the phase signal is located in a section where the phase signal should not be located, It can be determined that there is a risk of an error in the data.

In FIG. 4, it can be found that no phase signal is located between No. 1 and No. 60 of the crank toot section. In this case, if there is a normal combustion of the No. 1 cylinder, A phase signal should be generated from the ignition coil 200 due to the combustion execution of the first cylinder in the crank toothed section, but it is determined that there is a risk of error in the engine synchronization setting.

To be more specific, the electronic control unit 100 executes the error detection logic differently according to the set engine synchronization reference point after setting the engine synchronization reference point and setting the engine synchronization reference point.

That is, if the engine synchronizing reference point is set to the first toot count (i.e., the tooth count is set to 61) due to the combustion of the first cylinder, the phase of the crank signal in the long tooth interval It is determined that engine synchronization is set based on a normal phase signal if there is an overlapped phase signal section.

On the other hand, if the generation period of the phase signal is not included in the interval between the long teeth of the crank signal, the error occurrence count is increased by one, and when the increased error occurrence count reaches a predetermined threshold value, And the final judgment is made.

On the other hand, when the engine synchronizing reference point is set to the second toot count (i.e., the tooth count is set to 1) due to the combustion of the fourth cylinder, the phase of the crank signal in the long tooth interval It is determined whether or not the generation periods of the signals are not overlapped. If there is no overlapping phase signal period, it is determined that the engine synchronization is set based on the normal phase signal.

On the other hand, if the period of generation of the phase signal is included in the interval between the long teeth of the crank signal, the error occurrence count is increased by one, and when the increased error occurrence count reaches a predetermined threshold value, And the final judgment is made.

5 is a diagram illustrating an operation process of the electronic control unit 100 according to an embodiment of the present invention. As shown by way of example only in Fig. 5, the error detection method of the vehicle engine synchronization setting without the cam sensor executes the vehicle drive by the operation of the ignition key for the vehicle (S1).

Thereafter, the electronic control unit 100 receives a crank signal from the crank sensor 300 and receives a phase signal from the ignition coil 200 corresponding to the specific cylinder during combustion of any one of the plurality of cylinders, (Step S3) for setting an engine synchronization reference point based on the received crank signal or the crank signal and the phase signal.

If the engine synchronization reference point set in step S3 is set to the first Tooth count set by the combustion of the first cylinder (i.e., the Tooth count is set to 61), the corresponding error detection logic is executed, It is determined whether there is a phase signal generated from the ignition coil 200 connected to the first cylinder by the combustion execution of the first cylinder in the interval between the first long tooth and the second long tooth of the signal S5 and S7).

If the phase signal is not included in the interval between the first long tooth and the second long tooth of the crank signal in step S7, the error occurrence count is incremented by one (S9).

Thereafter, if the increased error occurrence count is equal to or greater than a predetermined threshold value, it is determined that an error has occurred in the engine synchronization setting due to an error in the phase signal (S13).

If the engine synchronization reference point set in step S3 is set to a second Tooth count set by the combustion of the fourth cylinder (i.e., the Tooth count is set to 1), the corresponding error detection logic is executed, It is judged whether there is no phase signal generated from the ignition coil 200 connected to the first cylinder by the combustion execution of the first cylinder in the interval between the first long tooth and the second long tooth of the signal (S15).

If the phase signal is included in the interval between the first long tooth and the second long tooth of the crank signal in the verification result of step S15, the error occurrence count is incremented by one.

However, if the phase signal is not included in the interval between the first long tooth and the second long tooth of the crank signal in the verification result of step S15, it is determined that the engine synchronization setting is normal (S17).

Thereafter, when the driving of the vehicle is terminated due to the release of the ignition key, the execution of the above-mentioned processes is terminated (S19).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Further, the present invention is for verifying whether or not an error in the phase signal that replaces the cam signal in the specific logic for determining each cylinder stroke of the vehicle engine in the absence of the cam sensor and performing synchronization of the vehicle engine, It is an invention that is industrially applicable because it has enough possibilities of business and can be implemented practically and clearly.

100: electronic control device 200: ignition coil
300: Crank sensor

Claims (6)

The electronic control unit receives the crank signal from the crank sensor and receives the phase signal from the ignition coil corresponding to the particular cylinder during the combustion of any one of the plurality of cylinders and outputs the crank signal or the crank signal and the phase signal A synchronization setting step of executing engine synchronization setting based on the engine synchronization setting;
When the engine synchronization reference point of the engine synchronization setting is set to a first toot count set by the combustion of the specific cylinder, the error detection logic is executed to output the phase signal in the interval between the long teeth of the crank signal A first verification step of verifying whether or not the first verification step is included;
A first counting step of incrementing an error occurrence count by one if the verification result does not include the phase signal; And
And a first determination step of determining an error for the engine synchronization setting if the error occurrence count is equal to or greater than a predetermined threshold and outputting a determination result. The method according to claim 1,
When the engine synchronization reference point of the engine synchronization setting is set to the second toot count set by the combustion of the other cylinders except the specific cylinder, the error detection method of the vehicle engine synchronization setting without the cam sensor A second verification step of verifying that the phase signal is not included in the interval between the long teeth of the crank signal;
A second counting step of incrementing the error occurrence count by one if the verification signal includes the phase signal; And
And a second determination step of determining an error for the engine synchronization setting if the error occurrence count is equal to or greater than a predetermined threshold and outputting a determination result. . 3. The method according to claim 1 or 2,
Wherein the synchronization setting step comprises: a receiving step of receiving the crank signal and receiving the phase signal from the ignition coil when the specific cylinder is burned;
Initiating the engine synchronization setting by preliminarily executing fuel injection and ignition control for the plurality of cylinders based on the crank signal or the crank signal and the phase signal; And
A setting for determining whether the interval between the first long tooth and the second long tooth of the crank signal overlaps the generation period of the phase signal and setting the engine synchronization reference point on the basis of the determination result; Wherein the step of determining the error of the vehicle engine synchronization setting comprises the steps of: The method of claim 3,
The method of detecting an error in a vehicle engine synchronization without a cam sensor is characterized in that when it is determined that the verification of the phase signal is normal, when the first tooth after the second long tooth reaches the first tooth, And performing fuel injection and ignition control for the plurality of cylinders based on the engine synchronization reference point from a toothed cylinder of the engine. 3. The method according to claim 1 or 2,
Wherein when the plurality of cylinders are four cylinders, the specific cylinder is set to the first cylinder. 3. The method of claim 2,
Wherein when the plurality of cylinders are four cylinders, the cylinder other than the specific cylinder is set to the fourth cylinder.


KR1020110146617A 2011-12-30 2011-12-30 Method for error detecting of synchronization set-up for engine of car without cam sensor KR101793078B1 (en)

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KR101793078B1 true KR101793078B1 (en) 2017-11-03

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002256956A (en) 2001-02-26 2002-09-11 Denso Corp Control device for internal combustion engine
JP2004124879A (en) 2002-10-04 2004-04-22 Honda Motor Co Ltd Device for determining stroke of engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002256956A (en) 2001-02-26 2002-09-11 Denso Corp Control device for internal combustion engine
JP2004124879A (en) 2002-10-04 2004-04-22 Honda Motor Co Ltd Device for determining stroke of engine

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