Vehicular driving control system and method for operating the same

Abstract

The present invention relates to a driving control system that performs predictive shift control through linkage with an information providing device and a method of operation thereof, comprising: an information providing device that provides information on the road ahead of a vehicle; a shift control device that controls shifting by predicting the road ahead conditions based on the road ahead information; and a diagnostic device that diagnoses whether there is a fault through a consistency check of the road ahead information and limits the predictive shift control of the shift control device based on the diagnosis result.

Description

Technology Field

[0001] The present invention relates to a driving control system that performs predictive transmission control through linkage with an information providing device, and a method of operation thereof. Background Technology

[0002] Various driving-related systems installed in a vehicle (e.g., engine, transmission, steering, suspension, etc.) control the vehicle's driving in conjunction with GPS (Global Positioning System)-based information providers, such as navigation systems, to achieve optimal driving performance. The driving-related systems utilize road information provided by the information provider to predict road conditions ahead and control the vehicle's driving by taking into account the predicted road conditions ahead. The problem to be solved

[0003] The present invention aims to provide a driving control system and a method of operation thereof that controls the operation of a forward predictive shift function by verifying the consistency of information provided by an information providing device during predictive shift control through linkage with an information providing device. means of solving the problem

[0004] A driving control system according to embodiments of the present invention is characterized by comprising: an information providing device that provides road information ahead of a vehicle; a shift control device that controls shifting by predicting road conditions ahead based on the road information ahead; and a diagnostic device that diagnoses whether a fault exists through a consistency check of the road information ahead and limits the predictive shift control of the shift control device based on the diagnosis result.

[0005] The above-mentioned forward road information is characterized by including at least one of the distance traveled per unit time, the forward road gradient, and the forward road curvature.

[0006] The diagnostic device is characterized by calculating the difference in information between predicted road information based on the road information ahead and actual road information ahead measured by a sensor, determining a fault state if the difference in information is greater than or equal to a first threshold, and determining a valid fault if the fault state persists for longer than a first reference time.

[0007] The sensor is characterized by being composed of at least one of a vehicle speed sensor, a longitudinal acceleration sensor, and a lateral acceleration sensor.

[0008] The above diagnostic device is characterized by instructing the transmission control device to stop the predictive transmission control when the above effective fault is determined.

[0009] The diagnostic device is characterized by determining a failure level based on the information difference and the duration of the failure state.

[0010] The above diagnostic device is characterized by increasing the number of failures whenever the failure level is determined.

[0011] The diagnostic device is characterized by increasing the number of failures based on an additive count that is variably set according to the failure level.

[0012] The above diagnostic device is characterized by determining to stop predictive transmission control from the time of the final failure until the ignition is turned off when the number of failures reaches a preset threshold.

[0013] The above diagnostic device is characterized by determining a normal return state if the information difference is less than or equal to a second threshold, determining a normal return if the normal return state persists for more than a second reference time, and determining to allow the resumption of the predictive shift control if the normal return is determined.

[0014] The above second reference time is characterized by being variably set based on the number of failures.

[0015] A method of operation of a driving control system according to embodiments of the present invention is characterized by comprising: a step in which a transmission control device predicts a road condition ahead of a vehicle based on road information ahead of a vehicle provided by an information providing device and controls the transmission; a step in which a diagnostic device diagnoses whether there is a fault through a consistency check of the road information ahead; and a step in which the predicted transmission control of the transmission control device is limited based on the diagnosis result.

[0016] The above-mentioned forward road information is characterized by including at least one of the distance traveled per unit time, the forward road gradient, and the forward road curvature.

[0017] The step of diagnosing whether a fault exists is characterized by including: a step of calculating the difference in information between predicted road information based on the road information ahead and actual road information ahead measured by a sensor; a step of determining a fault state if the difference in information is greater than or equal to a first threshold; and a step of determining a valid fault if the fault state persists for longer than a first reference time.

[0018] The step of diagnosing whether there is a fault further includes a step of determining a fault level based on the information difference and the duration of the fault state.

[0019] The step of diagnosing whether a fault exists further comprises the step of variably setting an increment count according to the fault level, and the step of increasing the number of faults based on the increment count each time a valid fault is determined.

[0020] The step of diagnosing whether there is a failure further includes a step of determining a return time based on the number of failures.

[0021] The above-described operation method is characterized by further including a step of determining a normal return state if the information difference is greater than or equal to a second threshold after fault diagnosis, and a step of determining a normal return if the normal return state persists for more than a second reference time.

[0022] The above-described operation method is characterized by further including a step of determining whether to allow the resumption of the predictive shift control when the above-described normal return is determined.

[0023] The step of limiting the predictive shift control is characterized by including the step of instructing the shift control device to stop the predictive shift control upon fault diagnosis, and the step of the shift control device switching the shift control mode from the predictive control mode to the automatic control mode. Effects of the invention

[0024] According to the present invention, predictive shift control can be performed in a situation where the reliability of the information is secured to a level higher than a predetermined level through verification of consistency of the information provided by the information providing device during predictive shift control by linking with the information providing device.

[0025] In addition, according to the present invention, if the reliability of the information provided by the information providing device is insufficient to a predetermined level, predictive shift control can be temporarily suspended. Brief explanation of the drawing

[0026] FIG. 1 is a block diagram illustrating a driving control system according to embodiments of the present invention. FIG. 2 is a flowchart illustrating the operation method of a driving control system according to embodiments of the present invention. FIGS. 3 and FIGS. 4 are drawings for explaining a fault diagnosis method according to a first embodiment of the present invention. FIG. 5 is a diagram illustrating a transmission control method according to a fault level according to a first embodiment of the present invention. FIG. 6 is a drawing for explaining a method for determining normal return according to a first embodiment of the present invention. FIG. 7 is a drawing for explaining a method for determining normal return based on the number of failures according to a first embodiment of the present invention. FIG. 8 is a drawing for explaining a fault diagnosis method according to a second embodiment of the present invention. FIG. 9 is a drawing for explaining a transmission control method according to a fault level according to a second embodiment of the present invention. FIG. 10 is a drawing for explaining a fault diagnosis method according to a third embodiment of the present invention. FIG. 11 is a drawing for explaining a transmission control method according to a fault level according to a third embodiment of the present invention. FIG. 12 is a block diagram showing a computing system that executes a method of operation of a driving control system according to embodiments of the present invention. Specific details for implementing the invention

[0027] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0028] In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0029] FIG. 1 is a block diagram illustrating a driving control system according to embodiments of the present invention.

[0030] Referring to FIG. 1, the driving control system (100) may include an information providing device (110), a detector (120), a transmission control device (130), and a diagnostic device (140) connected via a vehicle network. The vehicle network may be implemented using at least one of communication technologies such as a CAN (Controller Area Network), a MOST (Media Oriented Systems Transport) network, a LIN (Local Interconnect Network), Ethernet, and / or X-by-Wire (Flexray).

[0031] The information providing device (110) may provide map information and / or forward road information based on the vehicle's current location, direction of travel and / or set route, etc., or based on the vehicle's direction of travel. The forward road information may include information (data) such as distance traveled per unit time, forward road gradient and / or forward road curvature. The distance traveled per unit time may be the distance traveled per second calculated using a Global Positioning System (GPS). The forward road gradient and forward road curvature may be the road gradient and road curvature at a specific location in front of the vehicle, for example, at a point 200m ahead. The information providing device (110) may transmit the forward road information to the transmission control device (130) at predetermined intervals. Additionally, the information providing device (110) may directly transmit the forward road information to the diagnostic device (140).

[0032] The information providing device (110) may output (transmit) the hardware operation status and the route status. The information providing device (110) may determine whether the internally installed hardware is operating normally using a self-diagnosis solution. The information providing device (110) may determine the route status by checking the vehicle location based on the route it expects, such as the route to the destination or the MPP (Most Possible Path). The route status can be classified into an On Route state and an Off Route state. The On Route state refers to a state in which the vehicle is driving along the route expected by the information providing device (110), i.e., the expected route, and the Off Route state refers to a state in which the vehicle deviates from the expected route of the information providing device (110). The information providing device (110) may output forward road information at predetermined intervals only in the On Route state and may not output forward road information in the Off Route state. This is because the forward road information in the Off Route state is inaccurate and unreliable.

[0033] The information providing device (110) may include, although not shown in the drawing, a memory for storing map data, a GPS receiver for measuring vehicle location, a communication circuit for receiving traffic information from the outside, an output device for outputting route guidance (e.g., a display and a speaker, etc.), and / or a processor for searching and guiding a driving route.

[0034] The detector (120) can receive sensor signals (sensor data, measured values) output from various sensors in the vehicle, such as a vehicle speed sensor, a longitudinal acceleration sensor, and / or a lateral acceleration sensor. In other words, the detector (120) can detect longitudinal acceleration, lateral acceleration, and / or vehicle speed (vehicle speed), etc. using sensors mounted on the vehicle. The detector (120) can also detect the ignition switch status, engine rotational speed, and / or gear shift lever position, etc. The detector (120) can output the detected data, such as longitudinal acceleration, lateral acceleration, and / or vehicle speed, etc. to the diagnostic device (140).

[0035] The transmission control device (130) can control the operation of an automatic transmission (A / T) mounted on a vehicle. The transmission control device (130) can operate in an automatic control mode or a predictive control mode. When operating in the automatic control mode, the transmission control device (130) can perform automatic transmission control by changing the gear ratio according to the vehicle speed and the degree to which the accelerator pedal is pressed. When operating in the predictive control mode, the transmission control device (130) can perform predictive transmission control by utilizing forward road information transmitted from the information providing device (110). The transmission control device (130) can predict the forward road conditions based on forward road information, namely the distance traveled per unit time, the gradient of the forward road and / or the curvature of the forward road. The transmission control device (130) can change the gear ratio of the automatic transmission based on the predicted forward road conditions. Although not shown in FIG. 1, such a transmission control device (130) may include a communication circuit, memory, and a processor.

[0036] The diagnostic device (140) can diagnose whether the driving control system (100) has failed by checking the consistency of the forward road information provided by the information providing device (110). Based on the diagnostic result, the diagnostic device (140) can allow or disallow predictive shift control of the shift control device (130). The diagnostic device (140) may include a counter (141), a communication circuit (142), a memory (143), and a processor (144), etc.

[0037] Counter (141) is the number of failures of the driving control system (100). Fail It can count. The counter (141) is initialized (Counter) according to the instructions of the processor (144). Fail =0) can be.

[0038] The communication circuit (142) can support the diagnostic device (140) in communicating with other devices in the vehicle, such as an information providing device (110), a detector (120), and / or a transmission control device (130). Additionally, the communication circuit (142) may support communication between the diagnostic device (140) and an external electronic device. The communication circuit (142) may be implemented as a single chip or as separate chips.

[0039] The memory (143) may store a fault diagnosis algorithm and / or an algorithm for determining whether to execute a predictive shift. The memory (143) may be a non-transitory storage medium that stores instructions executed by the processor (144). The memory (143) may include a recording medium such as flash memory, a hard disk, an SSD (Solid State Disk), an SD card (Secure Digital Card), RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), PROM (Programmable Read Only Memory), EEPROM (Electrically Erasable and Programmable ROM), EPROM (Erasable and Programmable ROM), eMMC (embedded multimedia card), and / or UFS (universal flash storage).

[0040] The processor (144) can control the overall operation of the diagnostic device (140). The processor (144) may be implemented as at least one of processing devices such as an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), a PLD (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), a CPU (Central Processing Unit), microcontrollers and / or microprocessors.

[0041] The processor (144) can detect a failure of the driving control system (100) while the transmission control device (130) is performing predictive transmission control. The processor (144) can check whether there is an abnormality in the forward road information provided by the information providing device (110) and determine whether there is a failure based on the result of the check.

[0042] The processor (144) can receive forward road information transmitted from the information providing device (110) using the transmission control device (130). The processor (144) may also receive forward road information directly from the information providing device (110). The diagnostic device (140) can predict road information at a specific forward location located at a predetermined distance (e.g., 200m) from the vehicle based on the forward road information transmitted from the information providing device (110). Additionally, the diagnostic device (140) can obtain actual road information at a specific forward location based on sensor information obtained through the detector (120). The diagnostic device (140) can calculate the difference between the predicted forward road information (i.e., predicted forward road information) and the actual road information, i.e., the information difference. The processor (144) can determine a fault if the calculated information difference is greater than or equal to a fault determination threshold (a first threshold).

[0043] The processor (144) can determine whether the detected fault is valid. The processor (144) can detect (determine) a fault state if the difference (information difference) between the road information ahead and the actual road information is greater than or equal to a first threshold. The processor (144) can determine (diagnose) the detected fault as a valid fault if the fault state is maintained for more than a first reference time. Here, the first reference time may be a reference time for determining whether the detected fault is valid, i.e., a valid fault time. The processor (144) can diagnose a valid fault only when all of the following conditions are satisfied.

[0044] [Effective Fault Diagnosis Conditions]

[0045] - Internal combustion engine ON: The ignition switch is in the ON state and the internal combustion engine speed exceeds 400 rpm.

[0046] - The gear lever must be in the D position

[0047] - The hardware operating state of the information providing device (110) is normal

[0048] - The path status will not be off-route

[0049] - The actual vehicle speed Vs will exceed the standard vehicle speed, e.g., 30 kph

[0050] When a valid fault is determined, the processor (144) can immediately instruct the transmission control device (130) to stop predictive transmission control. In other words, the processor (144) can set a signal indicating the stop (prohibition) of predictive transmission control (predictive transmission prohibition signal) from '0' to '1' and transmit it to the transmission control device (130). Additionally, the processor (144) can operate the counter (141) to increase the number of faults whenever a valid fault is determined.

[0051] Additionally, the processor (144) can determine (determine) a failure level based on the difference between the information of the road ahead and the actual road information, and the time (continuous time) during which the failure state persists, i.e., the difference between the information and the first threshold reference value. The processor (144) can variably set an increment count according to the failure level. Whenever a failure level is determined, the processor (144) can increase the counter (141) by the increment count matching the failure level. For example, if the increment counts matching levels 1, 2, 3, and 4 are 0.5, 1.0, 2.0, and 3.0, respectively, the processor (144) can increase the counter (141) by 0.5 if the failure level is level 1, and increase the counter (141) by 2 if the failure level is level 3.

[0052] The processor (144) may stop predictive shift control from the time of the final failure until the ignition is turned off when the number of failures counted by the counter (141) reaches a preset threshold (e.g., 10 times). After determining that a valid failure has occurred, the processor (144) may determine that the state has returned to normal if the difference between the road information ahead and the actual road information is less than or equal to the normal return determination threshold (second threshold). The processor (144) may finally determine that the state has returned to normal if the state has returned to normal for a normal return determination time, i.e., a second reference time. When the state has returned to normal, the processor (144) may transmit a signal indicating permission to resume predictive shift control. In other words, if the state has returned to normal continuously for a second reference time, the processor (144) may allow predictive shift control of the shift control device (130).

[0053] The processor (144) can variably set a second reference time based on the number of failures. The second reference time may be increased as the number of failures increases. If the number of failures exceeds a preset threshold, for example, 10 times, the processor (144) may not release the failure determination state until the engine is turned off, even if the driving control system (100) returns to normal operation.

[0054] FIG. 2 is a flowchart illustrating the operation method of a driving control system according to embodiments of the present invention.

[0055] The transmission control device (130) can perform predictive transmission control based on forward road information received from the information providing device (110) (S100). The forward road information may include the distance traveled per unit time, the gradient of the forward road and / or the curvature of the forward road, etc.

[0056] The diagnostic device (140) can detect a fault by checking the consistency of the road information ahead while the transmission control device (130) performs predictive transmission control (S110). The diagnostic device (140) can predict road information at a specific location ahead that is a predetermined distance (e.g., 200m) away from the vehicle based on the road information ahead transmitted from the information providing device (110). Additionally, the diagnostic device (140) can obtain actual road information at a specific location ahead based on sensor information obtained through the detector (120). The diagnostic device (140) can calculate the difference between the predicted road information ahead (i.e., predicted road information ahead) and the actual road information ahead, i.e., the information difference. The diagnostic device (140) can check whether the calculated information difference is greater than or equal to a fault determination threshold (first threshold). If the calculated information difference is greater than or equal to the first threshold, the diagnostic device (140) can detect (determine) a fault state. The diagnostic device (140) can determine the detected fault as a valid fault if the fault condition determination persists for longer than the valid fault determination standard time (first standard time).

[0057] The diagnostic device (140) can determine the failure level based on the calculated information difference and the duration of the failure state (S120). The diagnostic device (140) can determine the failure level by referring to a lookup table stored in memory (143).

[0058] When a fault level is determined, the diagnostic device (140) can stop the predictive shift control of the shift control device (130) (S130). When a fault level is determined, the diagnostic device (140) can output a predictive shift prohibition signal, which instructs the cessation of predictive shift control, by changing the setting from '0' to '1'. Based on the predictive shift prohibition signal, the shift control device (130) can switch the shift control mode from the predictive control mode to the automatic control mode.

[0059] The diagnostic device (140) can increase the number of failures when a failure level is determined (S140). The diagnostic device (140) can increase the number of failures by an additional count matching the failure level whenever a failure level is determined. If the number of failures exceeds a preset threshold, the diagnostic device (140) can maintain the failure determination state until the engine is turned off.

[0060] The diagnostic device (140) can determine a normal return determination time (second reference time) based on the number of failures (S150). The normal return determination time may increase as the number of failures increases.

[0061] After S130, the diagnostic device (140) can determine a return to normal by comparing the predicted road information ahead with the actual road information (S160). The diagnostic device (140) can determine a state of normal return if the difference between the predicted road information ahead and the actual road information is less than or equal to a threshold for determining normal return (second threshold). The diagnostic device (140) can finally determine a return to normal if the state of normal return is maintained for a second reference time or longer.

[0062] When a normal return is determined, the diagnostic device (140) can determine whether the time maintained in the normal return state has elapsed the normal return determination time (second reference time) (S170).

[0063] The diagnostic device (140) may allow (permit) the resumption of predictive shift control of the shift control device (130) when the normal return state maintenance time has elapsed the normal return determination time (S180). When the diagnostic device (140) finally determines that the normal return has been achieved, it may change the predictive shift prohibition signal from '1' to '0' and output it to the shift control device (130).

[0064] FIGS. 3 and FIGS. 4 are drawings for explaining a fault diagnosis method according to a first embodiment of the present invention.

[0065] Referring to FIG. 3, when the vehicle is located at P0, the diagnostic device (140) can predict the vehicle position to P1 after a diagnostic reference time (e.g., 10 seconds) has elapsed, based on the distance traveled per unit time output from the information providing device (110). That is, the diagnostic device (140) uses the distance traveled per unit time information to predict the distance traveled by the vehicle during the diagnostic reference time, i.e., the predicted distance traveled D. POS It can be calculated. In this embodiment, the diagnostic device (140) is described as an example of calculating the predicted travel distance, but the information providing device (110) may also calculate the predicted travel distance and provide it to the diagnostic device (140).

[0066] Additionally, the diagnostic device (140) can measure the actual vehicle position P2 when the diagnostic reference time has elapsed using a vehicle speed sensor. In other words, the diagnostic device (140) measures the actual distance traveled by the vehicle D based on the vehicle speed measured by the vehicle speed sensor. REAL It can produce (calculate).

[0067] The diagnostic device (140) predicts the travel distance D using [Equation 1]. POSand actual travel distance D REAL The difference |dD| can be calculated.

[0068]

[0069] Referring to FIG. 4, the diagnostic device (140) determines that the calculated difference |dD| is a fault determination threshold dD f The abnormal condition is the effective failure time TD f If the abnormal persistence (continuous) occurs, it can be detected as an effective failure. That is, the diagnostic device (140) predicts the travel distance D POS and actual travel distance D REAL The difference |dD| is the effective failure time TD f fault determination threshold dD during f If the abnormality is maintained, it can be determined as a valid failure.

[0070] When a valid fault is determined, the diagnostic device (140) can change the control signal indicating the suspension (prohibition) of predictive shift control—that is, the predictive shift prohibition signal—from '0' to '1' and transmit it to the shift control device (130). Additionally, when a valid fault is determined, the diagnostic device (140) can use a fault count counter. POS_FAIL It can increase.

[0071] FIG. 5 is a diagram illustrating a transmission control method according to a fault level according to a first embodiment of the present invention.

[0072] The diagnostic device (140) predicts the travel distance D POS and actual travel distance D REAL The failure level can be determined based on the difference |dD| and the duration of that difference |dD|, i.e., the total continuous time.

[0073] When a fault is determined, the diagnostic device (140) can immediately stop the predictive shift control of the shift control device (130) regardless of the fault level. At this time, when the shift control device (130) receives a command to stop the predictive shift control from the diagnostic device (140), it can return the shift control mode from the predictive control mode to the automatic control mode.

[0074] The diagnostic device (140) can increase the number of failures each time a failure is determined. The diagnostic device (140) sets an incremental count according to the failure level, and the number of failures Counter is set by the incremental count. POS_FIAL It can increase.

[0075] The diagnostic device (140) can decide to disallow (or not allow) predictive shift control from the time of the last failure until the ignition is turned off when the number of failures reaches a preset threshold. Accordingly, the shift control device (130) can stop predictive shift control according to the control command of the diagnostic device (140).

[0076] FIG. 6 is a drawing for explaining a method for determining normal return according to a first embodiment of the present invention.

[0077] The diagnostic device (140) determines that the difference |dD| between the predicted travel distance and the actual travel distance after an effective fault determination is a normal return determination threshold dD OK The state below is the normal judgment time TD OK If the abnormal condition persists, it can be determined that it has returned to normal. More specifically, the diagnostic device (140) determines that the difference |dD| between the predicted travel distance and the actual travel distance in the fault determination state is the normal return determination threshold dD OK If it changes to the value below, it can be determined that normal return has commenced. The diagnostic device (140) determines that the difference |dD| between the predicted travel distance and the actual travel distance after the commencement of normal return is the normal return determination threshold dD OK Normal return state below normal judgment time TD OKIf the abnormal condition persists, a final decision to return to normal can be made. When the diagnostic device (140) determines that a return to normal has been made, it can change the predicted shift prohibition signal from '1' to '0' and transmit it to the shift control device (130). In other words, the diagnostic device (140) determines the normal determination time TD OK If a normal return state is determined continuously during that period, predictive transmission control of the transmission control device (130) may be allowed to resume.

[0078] FIG. 7 is a drawing for explaining a method for determining normal return based on the number of failures according to a first embodiment of the present invention.

[0079] The diagnostic device (140) can variably set the time for determining normal return, that is, the normal return determination time, according to the number of failures. The normal return determination time increases as the number of failures increases. If the total number of failures read by the counter (141) exceeds 10, the diagnostic device (140) may not release the failure determination state until the engine is turned off, even if the driving control system (100) is maintained in a normal state. That is, if the number of failures exceeds a preset threshold, the diagnostic device (140) may restrict predictive transmission control until the engine is turned off, even if the forward road information output from the information providing device (110) is maintained in a reliable normal state.

[0080] FIG. 8 is a drawing for explaining a fault diagnosis method according to a second embodiment of the present invention.

[0081] The information providing device (110) is located at a predetermined distance D in front of P0 when the vehicle is located at P0. M Road gradient SL at a specific location P1, located at a distance prd (=tanθ * [%]) can be predicted. The information providing device (110) can predict the predicted forward road gradient (predicted road gradient) SL prd (=tanθ [%]) can be transmitted to the diagnostic device (140).

[0082] The detector (120) can measure longitudinal acceleration using a longitudinal acceleration sensor when the vehicle actually passes a specific location P1. The diagnostic device (140) can determine the actual (measured) road gradient SL based on the longitudinal acceleration output from the detector (120). real It can produce.

[0083] The diagnostic device (140) obtains the predicted road gradient SL from the information providing device (110). prd and actual road gradient SL real The gradient difference |dSL| between them can be calculated. The gradient difference |dSL| can be expressed as [Equation 2].

[0084]

[0085] The diagnostic device (140) has a gradient difference |dSL| which is a fault determination threshold dSL f If abnormal, it can be determined that a fault has occurred (fault state). The diagnostic device (140) determines that the fault state is an effective fault time TSL. f If this persists, it can be determined as a valid failure.

[0086] When a valid fault is determined, the diagnostic device (140) can output a predictive shift prohibition signal, which instructs the suspension (prohibition) of predictive shift control, by changing the setting from '0' to '1'. The diagnostic device (140) can also instruct the suspension of gradient-related functions. Additionally, the diagnostic device (140) operates a counter (141) to counter the number of faults. SL_FAIL It can increase.

[0087] FIG. 9 is a drawing for explaining a transmission control method according to a fault level according to a second embodiment of the present invention.

[0088] The diagnostic device (140) can determine the fault level by referring to the graph shown in FIG. 9 when a fault occurs. The diagnostic device (140) can determine the fault level based on the gradient difference |dSL| and / or the continuous time the fault condition has persisted, etc.

[0089] When a fault is determined, the diagnostic device (140) can instruct the transmission control device (130) to immediately stop gradient-related predictive transmission control regardless of the fault level. When a fault is determined, the diagnostic device (140) can use a fault count counter based on an additive count corresponding to the determined fault level. SL_FIAL It can be increased. The increment count can be set larger as the failure level increases.

[0090] The diagnostic device (140) can stop predictive transmission control from the time of the last failure until the ignition is turned off when the total number of failures reaches a preset threshold (e.g., 10 times).

[0091] FIG. 10 is a drawing for explaining a fault diagnosis method according to a third embodiment of the present invention.

[0092] The information providing device (110) is located at a predetermined distance D in front of P0 when the vehicle is located at P0. M The forward road curvature R of the dropped P1 prd It can predict. The detector (120) can measure the road curvature at P1 using a lateral acceleration sensor at the time when the vehicle passes P1. The diagnostic device (140) [determines] the lateral acceleration G measured by the lateral acceleration sensor. y Based on the measured road curvature R real It can calculate the measured road curvature R. real It can be expressed as [Mathematical Formula 3].

[0093]

[0094] Here, v(m / sec²) = 0.278V(km / h), and V is the vehicle speed.

[0095] The diagnostic device (140) predicts the road curvature R using the following [Equation 4] prd and actual road curvature R real The difference |dR| between them can be calculated.

[0096]

[0097] The diagnostic device (140) predicts the road curvature R prd and actual road curvature R real Based on the curvature difference |dR| between, the consistency, i.e., reliability, of the predicted road curvature information provided by the information providing device (110) can be diagnosed. The diagnostic device (140) can diagnose the curvature difference |dR| as a fault determination threshold dR f If abnormal, it can be determined that it is in a fault state. The diagnostic device (140) determines that the fault state is an effective fault time TR f If the failure persists for an extended period, the failure can be determined as a valid failure.

[0098] If the diagnostic device (140) determines that a valid fault has occurred, it may instruct the transmission control device (130) to stop the curvature-related predictive transmission control. Additionally, the diagnostic device (140) may immediately stop the curvature-related function. The diagnostic device (140) counters the number of faults each time a valid fault is determined. R_FIAL It can increase.

[0099] FIG. 11 is a drawing for explaining a transmission control method according to a fault level according to a third embodiment of the present invention.

[0100] The diagnostic device (140) can determine the fault level by referring to the graph shown in FIG. 11 when a fault occurs. The diagnostic device (140) can determine the fault level based on the difference in curvature |dR| and the continuous time the fault condition has persisted.

[0101] When a fault is determined, the diagnostic device (140) can instruct the transmission control device (130) to immediately stop curvature-related predictive transmission control regardless of the fault level. The diagnostic device (140) has a fault count counter each time a fault level is determined. R_FIALThe number of failures can be increased. The diagnostic device (140) can increase the number of failures based on an additional count that is changed according to the failure level determined when the number of failures increases.

[0102] The diagnostic device (140) can instruct the suspension of predictive transmission control from the time of the last failure until the ignition is turned off when the number of failures reaches a preset threshold.

[0103] FIG. 12 is a block diagram showing a computing system that executes a method of operation of a driving control system according to embodiments of the present invention.

[0104] Referring to FIG. 12, the computing system (1000) may include at least one processor (1100), memory (1300), user interface input device (1400), user interface output device (1500), storage (1600), and network interface (1700) connected via a bus (1200).

[0105] The processor (1100) may be a semiconductor device that executes processing on instructions stored in a central processing unit (CPU) or in memory (1300) and / or storage (1600). The memory (1300) and storage (1600) may include various types of volatile or non-volatile storage media. For example, the memory (1300) may include ROM (Read Only Memory) (1310) and RAM (Random Access Memory) (1320).

[0106] Accordingly, the steps of the method or algorithm described in connection with the embodiments disclosed herein may be directly implemented in hardware, software modules, or a combination of both, executed by the processor (1100). The software modules may reside in a storage medium (i.e., memory (1300) and / or storage (1600)) such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, and CD-ROMs. An exemplary storage medium is coupled to the processor (1100), and the processor (1100) can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium may be integral with the processor (1100). The processor (1100) and the storage medium may reside within an application-specific integrated circuit (ASIC). The ASIC may reside within a user terminal. Alternatively, the processor (1100) and the storage medium may reside as separate components within the user terminal.

[0107] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

Claim 1 A driving control system comprising: an information providing device that provides information on the road ahead of a vehicle; a transmission control device that predicts the road ahead conditions based on the road ahead information and controls the transmission; and a diagnostic device that diagnoses whether a fault exists through a consistency check of the road ahead information and limits the predictive transmission control of the transmission control device based on the diagnosis result, wherein the diagnostic device calculates the difference in information between the predicted road ahead information based on the road ahead information and the actual road ahead information measured by a sensor, determines a fault state if the difference in information is greater than or equal to a first threshold, determines a valid fault if the fault state persists for more than a first reference time, determines a fault level among a plurality of levels based on the difference in information and the time the fault state persists, increases the number of faults by accumulating an additional count that is differently set corresponding to each of the fault levels whenever the fault level is determined, determines to stop the predictive transmission control from the time of the final fault occurrence until the ignition is turned off when the number of faults reaches a preset threshold, and variably sets a second reference time for determining a return to normal based on the number of faults. Claim 2 A driving control system according to claim 1, wherein the forward road information comprises at least one of the distance traveled per unit time, the forward road gradient, and the forward road curvature. Claim 3 delete Claim 4 A driving control system according to claim 1, wherein the sensor comprises at least one of a vehicle speed sensor, a longitudinal acceleration sensor, and a lateral acceleration sensor. Claim 5 A driving control system according to claim 1, wherein the diagnostic device instructs the transmission control device to stop the predictive transmission control when the effective fault is determined. Claim 6 delete Claim 7 A driving control system according to claim 1, wherein the diagnostic device increases the number of failures whenever the failure level is determined. Claim 8 delete Claim 9 delete Claim 10 A driving control system according to claim 1, wherein the diagnostic device determines a normal return state if the information difference is less than or equal to a second threshold, determines a normal return if the normal return state persists for more than the second reference time, and determines to allow the resumption of the predictive shift control if the normal return is determined. Claim 11 delete Claim 12 A step in which a transmission control device predicts the road conditions ahead of a vehicle based on road information provided by an information providing device and controls the transmission; a step in which a diagnostic device diagnoses whether there is a fault by checking the consistency of the road information ahead; and a step in which the predictive transmission control of the transmission control device is limited based on the diagnosis result, wherein the step of diagnosing whether there is a fault includes: a step of calculating an information difference between the predicted road information based on the road information ahead and the actual road information ahead measured by a sensor; a step of determining a fault state if the information difference is greater than or equal to a first threshold; a step of determining a valid fault if the fault state persists for more than a first reference time; a step of determining one of a plurality of fault levels based on the information difference and the time the fault state persists if it is determined to be a valid fault; a step of increasing the number of faults by accumulating an additional count that is differently set corresponding to each fault level whenever the fault level is determined; and a step of determining a second reference time for determining normal return based on the number of faults, and the step of limiting the predictive transmission control includes: a step of instructing the transmission control device to stop the predictive transmission control when a fault is diagnosed. A method of operation of a driving control system characterized by including the step of the transmission control device switching the transmission control mode from a predictive control mode to an automatic control mode. Claim 13 A method of operation of a driving control system according to claim 12, wherein the forward road information comprises at least one of a distance traveled per unit time, a forward road gradient, and a forward road curvature. Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 A method of operation of a driving control system according to claim 12, further comprising: a step of determining a normal return state if the information difference is greater than or equal to a second threshold after fault diagnosis; and a step of determining a normal return if the normal return state persists for more than the second reference time. Claim 19 A method of operation of a driving control system according to claim 18, further comprising the step of determining to allow the resumption of the predictive shift control when the normal return is determined. Claim 20 delete

Images