KR20070055282A - Torque filtering device of vehicle and method thereof - Google Patents

Abstract

When a vehicle equipped with an ETC and a manual transmission detects a torque demand according to the driver's tip-in or tip-out, the shock and jerk are controlled by optimal torque filtering according to the driving situation of the vehicle.

If the driver's torque request is detected while driving the vehicle, determining whether it is a tip-in condition during shifting; and if the driver's torque request is a tip-in condition in the gear engagement state, applying a process of applying torque filtering by applying a step gradient to each section; If it is determined that the tip is a condition during shifting, the engine torque may be quickly converged to the required torque of the driver by applying torque filtering for a rapid increase of the engine torque.

Engine torque, shock, jerk, torque filtering, tip-in during shifting

Description

Torque filtering device of vehicle and its method {TORQUE FILTERING DEVICE OF VEHICLE AND METHOD THEREOF}

1 is a schematic configuration diagram of a torque filtering device for a vehicle according to the present invention;

2 is a flow chart of an embodiment of performing torque filtering in a vehicle according to the invention.

3 is a graph of torque filtering control applied to a conventional vehicle.

<Explanation of symbols for the main parts of the drawings>

10: operation information detection unit 20: control unit

30: ETC

The present invention relates to a vehicle equipped with an electronic throttle controller (ETC) and a manual transmission, and more particularly, when the torque demand of the driver according to the tip-in or tip-out is detected, the optimum torque filtering according to the driving situation of the vehicle ( Torque Filtering) relates to an apparatus and method for torque filtering of a vehicle to provide control of shock and jerk.

In the case of a vehicle equipped with a manual transmission (M / T), the clutch system that transmits the driving force of the engine to the transmission is made of spring mass, so when the driving force, that is, the engine torque, is generated, shock and jerk are generated. Is accompanied by a phenomenon.

In order to improve the shock and jerk (Engine), the engine management system (Anti-Jerk Function) and torque filtering method is applied.

The anti-jerk function calculates the amount of change in the engine speed (RPM) when the driver's tip-in is detected and detects the ignition timing when the currently measured engine speed (RPM) becomes larger than the set low-pass filtered reference engine speed. By suppressing the increase of the engine speed, jerks are not generated.

In addition, the torque filtering method calculates the required torque according to the driver's acceleration will (acceleration pedal opening degree). The calculated yog torque value is suppressed by filtering to increase with a constant slope. Generation of jerk is suppressed.

The above two methods are appropriately combined according to vehicle characteristics such as engine / drive train / vehicle weight / clutch system.In vehicles equipped with Idle Speed Actuator (ISA), even if the ISA is completely closed when the TPS is open Because of insufficient control, anti-jerk function is mainly used.In vehicles equipped with ETC, it is possible to control the engine torque by controlling the air volume by ETC. Therefore, the control by torque filtering is mainly used.

This will be described in more detail with reference to FIG. 3 as follows.

First, when a torque request (DTR) caused by the driver's tip-in is generated, the torque control bit (TTB) is activated in the engine control means (not shown) to adjust the driver's torque request (DTR) by section, approximately three steps. Apply the filter by the interval of.

That is, the torque demand DTR according to the driver's tip-in takes into account the current engine speed RPM and the shift stage, and then applies the filtering constant of the first slope S1 to reach the first torque T1. When the first stage of torque raising control is performed and the first stage of torque raising control is completed, considering the current engine speed (RPM) and the shift stage, the second torque T2 is applied by applying the filtering constant of the second slope S2. The second stage of the raising control to reach a), and when the torque raising control of the second stage is completed, taking into account the current engine speed (RPM) and the shift stage, the driver applies the filtering constant of the third slope (S3). By raising the control so as to reach the third torque T3, which is the required torque DTR, the engine torque is increased to match the driver's torque request DTR.

In this way, when the engine torque that matches the driver's requested torque DTR is controlled, the driver's demand is maintained.

When a torque request (DTR) is generated by tipping out while being controlled by the driver's required torque, the torque control bit (TTB) is activated in the engine control unit to filter the driver's torque request (DTR) by section in contrast to the tip-in condition. Apply.

That is, considering the current engine speed (RPM) and the shift stage with respect to the torque request (DTR) according to the tip out of the driver, the second torque T2 is reached by applying the filtering constant of the fourth slope S4. When the first stage of the lowering control is performed and the first stage of the torque lowering control is completed, the second torque (5) is applied by applying the filtering constant of the fifth slope S5 in consideration of the current engine speed (RPM) and the shift stage. The second step lowering control is performed to reach T1), and when the torque lowering control of the second step is completed, considering the current engine speed (RPM) and the gear shift stage, and then applying the filtering constant of the sixth slope (S6) By controlling the lowering to reach the idle torque, the engine torque is kept in accordance with the driver's torque request DTR.

As described above, the torque filtering method applied to a conventional vehicle is provided with a pure function that can reduce shock and jerk through control of ETC and ignition timing, but when excessive filtering is applied, an acceleration delay occurs. Disadvantages include feelings of acceleration and dysfunction that do not satisfy the characteristics of the manual transmission.

That is, in the torque filtering method applied to the conventional vehicle, tip in / tip out is not distinguished with respect to the shift condition and the condition (In Gear) in which the gear is engaged.

Therefore, when the torque filtering is set on the basis of the shift, excessive shock occurs when the gear is engaged due to the maximum torque transmission and the increase in the torque rising slope, thereby causing a problem in that vibration is increased.

On the contrary, when the torque filtering value is set in consideration of shock and jerk when the gear is engaged, the torque rising speed is low at the gear shift, and thus, the smooth torque transmission and dynamic operation cannot be performed. Will occur.

The present invention has been invented to solve the above problems, the purpose of which is the state of the gear mesh and the fast torque rise (Fast Torque Increase) that requires a slow torque increase for the torque demand according to the driver tip in / out (Fast) Torque Increase is divided into necessary gear shifting conditions, and the appropriate torque filtering for each case is applied to provide a stable ride and acceleration response.

According to an aspect of the present invention, there is provided a method of determining a tip-in condition during shifting when a driver's torque request is detected while driving a vehicle; If the driver's torque demand is a tip-in condition in a gear engagement state, applying torque filtering based on a stepwise gradient; When it is determined that the tip-in condition during shifting, the present invention provides a method for filtering torque of a vehicle, comprising applying torque filtering for a rapid increase in engine torque to quickly converge the engine torque to a required torque of the driver.

The determination of the shift tip in condition is a torque filtering of the vehicle, characterized in that the clutch is determined to be in operation, the throttle is detected from closed to open, is not in an idle state, and satisfies a condition that is not oscillation in the stationary state. Provide a method.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the apparatus for filtering torque of a vehicle according to the present invention includes a driving information detector 10, a controller 20, and an ETC 30. In addition to the above components, more components are included in the vehicle. Ordinary functions will be performed for components that are included but are not directly related to the present invention.

The driving information detection unit 10 includes the engine speed (RPM) of the vehicle while driving, the accelerator pedal opening degree, the torque request according to the tip in / tip out of the driver, the vehicle speed, whether the throttle is fully closed, whether the gear is engaged, the clutch signal, the present Information about the shift stage is detected and each piece of information about the shift stage is applied to the controller 20.

When the torque request according to the tip-in of the driver is detected, the controller 20 determines whether the gear is in the gear engagement state or the torque request generated during the gear shifting from the information detected by the driving information detection unit 10, If it is determined that the torque is demanded, torque filtering for fast torque rise is applied to provide quick response.

The ETC 30 is operated according to the control signal applied from the control unit 20 to control the amount of air flowing into the combustion chamber to adjust the engine output torque.

Referring to the operation of the present invention including the function as described above is as follows.

The driving information detecting unit 10 while the vehicle is running, the engine speed (RPM), the opening of the accelerator pedal, the torque request according to the tip-in / tip-out of the driver, the vehicle speed, whether the throttle is closed, whether the gear is engaged, General driving information including a clutch signal, information about a current shift stage, etc. is detected and information about the driving information is applied to the control unit 20 (S101).

At this time, the control unit 20 determines whether the tip-in during shifting by analyzing the information detected as described above (S102).

The detection of the tip-in during the shift is a condition that is the tip during shifting if the clutch signal is determined as the operation of the clutch, the signal of the throttle is detected from closed to open, is not in the idle state, and is not a start in the stop state. Determined by

As a result of the determination of S102, if it is determined that it is not a tip-in condition during shifting, it is determined as a tip-in or tip-out condition in a gear engagement state in which clutch slip does not occur, and the aforementioned conventional torque filtering is applied. By applying the filtering constants for each section in accordance with the vibration characteristics it is possible to achieve a torque control to meet the torque demand of the driver (S104).

However, if it is determined in the determination of S102 that the tip-in condition during the shift, torque filtering is applied so that a rapid torque rise can be made so that the engine torque can be quickly reached to the required torque of the driver (S103).

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

As described above, the present invention provides a stable ride comfort of the vehicle by providing shock and jerk control with optimal torque filtering according to the driving situation of the vehicle when tip in or tip out is detected in a vehicle equipped with an ETC and a manual transmission. To provide.

In addition, there is an effect that the characteristics of the manual transmission is utilized to the maximum by providing a quick response to the tip-in request that occurs during the shift.

Claims (3)

In a vehicle equipped with a manual transmission, Detect information on engine speed (RPM), accelerator pedal opening, torque demand according to driver's tip in / tip out, vehicle speed, throttle totally closed, gear engagement, clutch signal, current gear A driving information detection unit; When the torque demand according to the tip-in or tip-out of the driver is detected, it is determined whether the gear is in the gear engagement state or the torque demand generated during the gear shift. A controller; And an ETC operated according to a control signal applied from the controller to control an amount of air flowing into the combustion chamber to adjust engine output torque. Determining whether a condition is a tip during shifting when a driver's torque request is detected while driving the vehicle; If the driver's torque demand is a tip-in condition in a gear engagement state, applying torque filtering based on a stepwise gradient; And if it is determined that the tip-in condition is during the shift, applying torque filtering for a rapid increase in engine torque so that the engine torque is quickly converged to the required torque of the driver. The method of claim 2, The determination of the shift tip in condition is a torque filtering of the vehicle, characterized in that the clutch is determined to be in operation, the throttle is detected from closed to open, is not in an idle state, and satisfies a condition that is not oscillation in the stationary state. Way.

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