KR100350263B1 - Method for preventing shift shock by detecting oil amount of automatic transmission vehicle - Google Patents

Abstract

PURPOSE: A shift shock preventive method by detecting the oil amount of an automatic transmission vehicle is provided to minimize shift shock in engaging gears, and to improve endurance by reducing torque of an engine. CONSTITUTION: The present state is detected according to the speed range, the opening degree of a throttle valve and position of a brake switch in operating an automatic transmission, and the present oil flow from an oil chamber is detected with an oil amount detecting unit. Oil temperature is classified every 5 deg.C within the range of 20 - 65 deg.C. Temperature of an electric terminal is divided into 10 stages, and converted into voltage signals to an ECU(Electronic Control Unit). The ECU decides the delay range angle corresponding to the voltage signal in case of input of the brake switch and the throttle valve opening degree to be zero, and delays the ignition according to the signal.

Description

Oil level detection device of vehicle automatic transmission and corresponding shift prevention method

The present invention relates to a method for detecting the amount of oil that changes during shifting of an automatic transmission for a vehicle and reducing the shift shock according to the change of the amount of oil. In particular, the ignition delay of the engine is properly adjusted according to the change of the amount of oil that changes during shifting. By reducing the torque of the engine as a result, the present invention relates to an oil amount detecting device of a vehicle automatic transmission and a method of preventing a shock according to the automatic transmission, which can minimize the shift shock generated when the automatic transmission is shifted.

In general, the automatic transmission used in a vehicle is complicated in structure, and the fuel consumption is relatively high and expensive compared with a conventional gear transmission, but there is no gear shifting and there is no mechanical connection between the engine and the power train. Therefore, due to the advantage that the impact on each part is relatively small, a combination of a torque converter and a planetary gearbox, which are mainly used as a type of power transmission device, is increasingly used. .

This automatic transmission is to increase the action and rotational force of the fluid clutch that converts the rotation of the engine into the kinetic energy of the fluid and converts it back into power, as shown in FIG. 1 generally showing the structure of a general automatic transmission 1 in a partial perspective view. A planetary gear unit (3) consisting of a multi-ply clutch brake band one-way clutch, an oil pump and a hydraulic control mechanism, and a planetary gear unit (3), including a conventional transducer (2), planetary gears coupled to the rear of the transducer (2). It is composed of a planetary control device (4) for operating by controlling the hydraulic pressure of the oil changed by the oil pump (5) automatically or manually to match the vehicle speed or operating conditions.

Here, the planetary control device 4 of the automatic transmission 1 controls the planetary gear unit 3 by automatically or manually changing the hydraulic pressure in accordance with the vehicle speed or driving conditions. And the low-speed reverse brake acting or interrupting at an appropriate time, and lubricating the hydraulic part and each part of the transducer 2 while determining the upshift and downshift timing by detecting the vehicle speed or load, thereby lubricating each part. An oil pump (5) for supplying oil to the part, a valve body for distributing the oil pressure of the oil pump (5), and a pressure regulating valve and a planetary gear for adjusting the pressure to convert each gear stage according to the movement of the shift lever. It is composed of various valves such as shift valves that automatically convert according to vehicle speed and engine load.

Accordingly, such a general automatic transmission 1 is automatically shifted according to the operating conditions and the load of the engine through the converter 2, the planetary gear unit 3, and the planetary control device 4, which is advanced. For example, if the two-speed clutch is shifted, power is transmitted from the converter (2) to the ring gear constituting the planetary gear unit (3). Power is transmitted to the carrier while rolling over the fixed secondary sun gear, and thus the power transmitted to the carrier is transmitted directly to the output shaft, while the secondary planetary gear drives the primary planetary gear and The primary planetary gear drives the primary sun gear, but since the primary sun gear is freewheeled, there is no power transmission.

At this time, the planetary control device (4) is the pressure of the oil pump (5) is changed by the pressure change generated by the increase in engine negative pressure due to accelerated delivery, the planetary control device (4) in accordance with the pressure change of the oil ) To change the pressure of each valve constituting the), for example to reach a constant speed to control the pressure of the governor valve to sequentially change the gear stage corresponding to the modulator pressure.

However, as described above, the planetary control device 4 which detects the engine load according to the state of the vehicle speed and appropriately changes the oil pressure by the oil pump 5 of the automatic transmission 1 is used in the oil pump 5. The degree of change in the amount of oil sent out in the oil chamber containing the oil according to the pressure change is not only the shifting performance of the automatic transmission 1, but also the durability and noise generation of the clutches and brakes constituting the automatic transmission 1 and the respective gears. In general, in the case of the conventional automatic transmission 1, when the amount of oil increases, the line pressure of the planetary control device 4 also increases. In particular, the volume of oil varies during engine turbulence. It is relatively larger than the operating condition of the state, there is a phenomenon that the impact of the gear teeth due to the switching of the hydraulic circuit is increased during the shift.

As a result, when the automatic transmission 1 is shifted, power from the engine is forcibly restrained according to the hydraulic circuit switching as described above. Therefore, a shift shock caused by gear tooth pressure is generated, and the automatic transmission is felt as well as the automatic transmission. The durability of (1) is also greatly reduced, and in order to solve such a problem, a method of forcibly feeding back the hydraulic pressure converted at the time of shifting according to the oil temperature is used. There is a problem that the oil temperature sensor to measure the very expensive to follow many restrictions on its use.

Therefore, the present invention is invented to solve all the above problems, the amount of oil measured within a certain range of the combustion time in the engine combustion chamber by measuring the amount of oil according to the oil pressure of the planetary control device that changes depending on the vehicle speed By performing the corresponding ignition delay of the engine to the degree of, as a result, the torque of the engine is reduced, thereby minimizing the transmission shock due to the gear gearing generated during the shift of the automatic transmission, and also the durability of the automatic transmission The purpose of the present invention is to provide an oil amount detection device of a vehicle automatic transmission and a corresponding shift shock prevention method, which can improve the productability.

1 is a schematic configuration diagram showing an internal operation structure of a general automatic transmission,

2 is a schematic control configuration diagram showing a control flow relationship of an automatic transmission according to the present invention;

3 is a schematic configuration diagram of an oil amount detection device for measuring an oil amount of oil for an automatic transmission according to the present invention;

4 is a diagram showing the correlation with the amount of oil measured according to the present invention,

(B) is a diagram showing the ignition delay range,

(C) is a diagram showing the operating state of the ignition delay signal,

5 is a control flowchart to prevent shift shock when shifting by an ignition delay according to the present invention.

Explanation of symbols on main parts of drawing

1-automatic transmission, 1 '-engine,

1a '-ignition control, 2-transducer,

3-planetary gear unit, 4-planetary controller,

5-oil pump, 6-oil chamber,

6a-oil pipe, 6b-plotter,

7-oil level detector, 7a-electric terminal,

8- ECU, 9-TCU.

The present invention for achieving the above object, the automatic transmission is electrically connected to each other to be controlled by the TCU and ECU for controlling the engine (1 ') and various components, and in addition to the closed circuit, by the TCU In order to measure the change in the oil amount and the oil temperature according to the operation of the oil pump, the oil amount detecting device composed of a plurality of electrical terminals is provided in the oil tube of the oil chamber mounted on one side of the oil pump.

The electrical terminals of the oil quantity detection device are divided into respective stages so as to correspond to the temperature of the oil divided at regular intervals, and the voltage (V) and the delay range angle (R) corresponding to the respective temperature stages of the electrical temperature range. According to the condition of the vehicle speed, the current gear speed range, the throttle valve opening amount and the brake switch state are inputted into the TCU through each signal line to determine the current operation state. The ECU 8 receives a voltage (V) signal that converts the temperature of the current oil sent out from the oil chamber 6 through the oil pump according to the current vehicle speed through the detection device. When one value is determined and transmitted to the ECU, the engine's ignition control unit performs the ignition delay for a given interval according to the ECU's signal.

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

1 is a schematic diagram showing the internal operating structure of a general automatic transmission. As described above, the automatic transmission 1 converts rotation of the engine to increase torque and The hydraulic components of the planetary gear unit (3) and the planetary gear unit (3) which operate the shifting stage according to the operation of the converter (2) are hydraulically controlled to automatically or manually control the oil pressure according to the vehicle speed or operating conditions. It is composed of a planetary control device (4) connected to the circuit, the automatic transmission (1) to the TCU (8: Time Control Unit) and ECU (9: Engine Control Unit) that controls the engine (1 ') and various components It is electrically connected to each other to be controlled by the closed circuit.

And, Figure 3 shows a control configuration of a closed circuit electrically connected to each other as described above, the measurement signal of the changed oil amount of the oil pump portion 5 of the automatic transmission 1 to the TCU (8) When it is input, the result processed according to the built-in algorithm of this TCU 8 is sent to the ignition control device 1a 'of the engine 1' via the ECU 9 to ignite the ignition control device 1a '. In this case, the TCU 8 closes the closed circuit with the ECU 9 so as to receive a signal detected by the ECU 9 as a criterion according to the ignition timing state of the engine 1 '. Is achieved.

Here, the amount of oil to transmit a measurement signal of the amount of oil sent to the TCU (8) corresponding to the load of the oil pump (5) in the planetary control device (4) of the automatic transmission (1) by a change in the number of shifts in accordance with the vehicle speed A detection device 7 is provided in the oil pump 5 part, and one part of the oil pump 5 is properly discharged the oil contained in the side of the oil pump 5 as shown in FIG. The oil chamber 6 which consists of the oil pipe | tube 6a sent out to a circuit, and the floater 6b of the substantially "자" shape cross section floated so that the oil discharged to this oil pipe 6a may be adjusted appropriately is provided, A plurality of electric terminals are provided on the outer circumferential surface of the oil tube 6a of the oil chamber 6 at regular intervals to convert the position of the plotter 6b, which is moved in accordance with the discharge of oil, into an electrical signal and transmit it to the TCU 8. An oil amount detecting device 7 consisting of 7a is provided.

At this time, the electrical terminals 7a of the oil amount detection device 7 classify the temperature of the oil between 5 ° C. and 5 ° C. between 20 ° C. and 65 ° C. as shown in FIG. In step a10, the terminal 7b and the voltage range (V) in 0.5V to 4.5V steps every 0.5V and the delay range angle (R) are set in steps of -1 ° C to -10 ° C every 1 ° C. Here, the delay range angle (R) divided into steps of -1 ° C to -10 ° C means -10 ° C of the previous step based on the spark ignition point (BTDC) as shown in (B) of FIG. (C) of FIG. 4 means a pulse size per unit of −10 ° C. per second.

Accordingly, if the automatic transmission 1 is properly operated according to the state of the vehicle speed, as shown in FIG. 5, first, the current speed range range, i.e., P into the TCU 8 through each signal line (not shown) is shown. In addition to the state of shift stages such as (Parking) -R (Reverse) -N (Neutral) -D (Drive), the current throttle valve opening amount and brake switch state are inputted. It is determined whether or not the brake operation state by the driver and then the current flow rate from the oil chamber (6) through the oil pump (5) in accordance with the current vehicle speed through the oil level detection device (7) In this case, the current flow rate is detected by classifying the oil temperature between 20 ° C and 65 ° C into every 5 ° C, and correspondingly, the measured temperature of the electrical terminal 7b divided into steps a1 to a10 corresponds to this measurement temperature. Correspondingly, 0.5V to 4.5V every 0.5V To step is converted into a separate voltage (V) signal becomes the input to the ECU (8).

Subsequently, when the ECU 8 which has received the above-mentioned voltage V signal confirms that the brake switch input amount and the throttle valve opening amount are “0” again, the ECU 8 corresponds to this voltage V signal by -1 every 1 ° C. Determining one value of the delay range angle R divided by the step of -10 ° C to the ECU 9 causes the ignition control device 1a of the engine 1 'according to the signal of the ECU 9 to be transmitted. The ignition delay is performed for 1 second as shown in (C) of FIG. 4, where ') is greater than a given interval, i.e., the maximum delay range angle R, and combustion of the engine 1' is performed according to this ignition delay. This results in a delay effect, which in turn lowers the engine speed and reduces the engine torque. Therefore, the transmission shock of the gear is reduced by reducing the rotational difference between the gears engaged with the change in the flow rate of the automatic transmission. Let's go.

As described above, according to the present invention, the automatic transmission 1 is electrically connected to the TCU that controls the engine 1 'and various components to form a closed circuit, and the TCU is adapted to the amount of oil change in the automatic transmission. In order to measure the oil temperature accordingly, the oil quantity detector is provided to transmit the defined voltage (V) and the delay range angle (R) according to each step corresponding to the temperature of the oil. As a result, the engine's ignition control unit performs the ignition delay as much as a given interval, and as a result, the torque of the engine is reduced, thereby minimizing the shift shock due to the gear match generated during the shift of the automatic transmission. There is an effect that can improve the durability and marketability of the transmission.

Claims (1)

When the automatic transmission 1 is properly operated according to the state of the vehicle speed, the current operation is performed according to the current range of transmission means input into the TCU 8 through each signal line, the current throttle valve opening amount, and the brake switch state. The state is determined, and then the current flow rate transmitted from the oil chamber 6 through the oil pump 5 is detected according to the current vehicle speed through the oil amount detection device 7, wherein the detection of the current flow rate is oil The temperature of is classified into 5 ℃ between 20 ℃ and 65 ℃, and correspondingly, the measured temperature of the electric terminal 7b divided into steps a1 to a10 corresponds to this measurement temperature at 0.5V to 4 at 0.5V. The ECU 8, which is converted into a voltage V signal divided in 5V steps, is input to the ECU 8, and then the ECU 8, which has received the voltage V signal as described above, again inputs the brake switch and the throttle valve opening amount. If you check "0", this voltage (V According to the signal, one of the delay range angles (R) divided into steps of -1 ° C to -10 ° C is determined for each 1 ° C to control the ignition of the engine 1 'according to the signal of the ECU 9. A shift shock detection method according to oil amount detection of an automatic transmission in which a device (1a ') is delayed by a given interval.