KR20000002604U - Control device of vehicle automatic transmission - Google Patents

Abstract

In the automatic transmission, even when the shift lever is in the neutral position, the control device automatically shifts to the position of the drive according to the driving conditions. A control apparatus for a vehicle automatic transmission having an automatic transmission for selecting and shifting a gear corresponding to an input shift control signal, the apparatus comprising: a brake sensor for detecting a depression of a brake, a rotation sensor for detecting an engine speed, and a throttle valve When the output of the throttle position sensor detects the opening amount and the output of the brake sensor and the rotation sensor in response to the shift lever being placed in the neutral position and the brake is released, the output of the throttle position sensor is in the throttle opening state. It characterized in that it comprises a transmission controller for controlling the position of the automatic transmission to the drive position.

Description

Control device of vehicle automatic transmission

The present invention relates to a shift control device for an automatic transmission of a vehicle, and more particularly, to a control device for automatically shifting to a drive position according to driving conditions even when the shift lever is in a neutral position in the automatic transmission. will be.

Because of the convenience of driving, most vehicles are equipped with an automatic transmission that automatically shifts the gear according to the driving state of the vehicle, rather than a manual transmission in which the gear shift is performed manually by the driver. In addition, an automatic transmission is essential in a vehicle driven by a handicapped person with a disability on the bridge.

Such automatic transmissions, as is well known in the art, are suitable for driving conditions of the vehicle without any special operation when the shift lever (or select lever) is in the position of drive "D". The gear shift is automatically performed by the shift pattern.

The shift pattern is selected by the TCU (Transmission Control Unit) according to the detection result from various sensors installed in the vehicle, such as a throttle opening sensor, a brake switch, an oil temperature sensor, and an engine rotation sensor. This is achieved by controlling the solenoid by accessing from a preset memory table.

The above automatic transmission has the advantage of automatically shifting gears. However, when the shift lever is in the drive position and stopped while driving, the shift lever of the automatic transmission is in the range of the drive “D”, causing idle vibration. This is of course not a good cause of automatic transmission oil temperature rise.

In addition, while the vehicle is in a parked state, the automatic transmission remains under load, and noise and vibration are generated when the vehicle is stopped. Many drivers manually shift the shift lever of the automatic transmission to the neutral position at the drive position "D". There was a problem of shifting to "N". Therefore, it is not easy to change the shift lever from the drive position " D " to the neutral position " N " according to the parking stop when the hand or arm for operating the shift lever, for example, the right arm or hand, is disabled.

Accordingly, an object of the present invention is to provide a control device for an automatic transmission in which the drive position and the neutral position of the shift lever can be used in common.

Another object of the present invention is to provide a control device of an automatic transmission in which the shift lever is shifted to the sipe mode by automatically shifting when the vehicle is in a starting condition or a stopping condition in a neutral or drive position.

The present invention for achieving the above object, in the control device of the automatic vehicle transmission having an automatic transmission for shifting by selecting a gear corresponding to the input shift control signal, the brake sensor for detecting the depression state of the brake, the engine A rotation sensor for detecting rotational speed and a throttle position sensor for detecting an opening amount of the throttle valve, and in response to the shift lever being placed in a neutral position, the output of the brake sensor and the rotation sensor is read, and the brake is released. And a transmission controller for controlling the position of the automatic transmission to the drive position when the output of the throttle position sensor is in the throttle opening state.

1 is a block diagram of a control device of an automatic vehicle transmission according to an embodiment of the present invention.

FIG. 2 is a control flowchart of an automatic vehicle transmission according to an embodiment of the present invention, and is a program masked in a memory area in a transmission control unit (TCU) shown in FIG. 1.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

1 is a block diagram of an apparatus for controlling a vehicle automatic transmission according to an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a brake sensor for detecting a depression state of the brake pedal. In the brake sensor 10 as described above, the brake sensing signal BS is " ON " 12 is a speed sensor which detects a traveling speed of the vehicle and generates a speed detection signal SS. The speed sensor 12 may be of various types, but a wheel sensor for detecting rotation of the wheel or a sensor using a method for detecting rotation of the transmission output shaft may be used. 14 detects the engine speed and outputs the rotation detection signal RS.

Also, 16 is an inhibit switch that detects a position change of the automatic transmission shift lever and outputs a position detection signal PS. When the inhibit switch 16 is placed in the automatic transmission 20 described below, the inhibit switch 16 and the shift lever are connected by a cable or a rod, and the shift lever is moved to generate a signal of a different position. 17 is a throttle position sensor for detecting depression of the accelerator pedal, and is composed of a potentiometer and the like.

The outputs of the brake sensor 10, the speed sensor 12, the rpm sensor 14 and the inhibit switch 16 and the throttle position sensor 17 are supplied to the TCU 18. The TCU 18 is the brake sensing signal BS, the rotation sensing signal RS, the speed sensing signal SS and the throttle position sensor 17 when the position sensing signal PS of the inhibit switch 16 is in the neutral "N" position according to a preprogrammed program. Read the output of and generate the shift control signal SCS according to the result.

The shift control signal SCS outputted from the TCU 18 is a signal for shifting the shift control of the automatic transmission 20 connected to the output terminal side to the drive range "D" and the neutral range "N".

FIG. 2 is a control flowchart of an automatic vehicle transmission according to an embodiment of the present invention, and is a program masked in a memory area in a transmission control unit (TCU) shown in FIG. 1. The control procedure of Fig. 2 shows the relation which operates in response when the position sensing signal PS output from the inhibit switch 16 is a signal representing the neutral range " N " of the shift lever (not shown).

Before describing the operation according to the embodiment of the present invention with reference to FIGS. 1 and 2 in detail, it will be described on the assumption that the position of the gear shift lever is located at a neutral " N "

Now, when the vehicle equipped with the device configured as shown in FIG. 1 is operated, the TCU 18 reads the output PS of the inhibit switch 16 in step 22 of FIG. 2 to search whether the position of the shift lever is the neutral position "D".

At this time, the inhibit switch 16 is a switch operated in conjunction with the gear shift lever as described above, and outputs a signal corresponding to the position of the shift lever. If the position of the gear shift lever is determined to be neutral "N" in step 22 of FIG. 2, the TCU 18 reads the output of the brake sensor 10 in step 24 of FIG. 2 to determine whether the driver has stepped on the brake pedal (logic = "1"). ).

If the brake sensing signal BS is determined to be logic "1" in step 24, the TCU 18 determines that the brake pedal is depressed, and recognizes that the brake pedal is in the neutral mode in step 34. The shift control signal SCS for the neutral shift is synthesized by combining the outputs of the various sensors. Feeds automatic transmission 20 to the neutral position.

If the brake sensing signal BS is determined to be logic "0" in step 24, the TCU 18 determines that the brake pedal is not depressed, and in step 26, the engine speed is read by reading the rotation detection signal RS output from the rpm sensor 14. Search for "0". In the exemplary embodiment of the present invention, the engine speed is searched for "0", but the engine speed may be searched for rotating below the idle speed.

If it is determined that the rotation detection signal RS of the rpm sensor read in step 26 is "0" (or idling rpm), the TCU 18 recognizes the neutral mode in step 34 and shifts to the neutral position. Supply the shift control signal SCS to the automatic transmission 20.

At this time, the automatic transmission 20 makes the gear shift to the neutral position in response to the shift control signal SCS of the neutral position output from the TCU 18. However, if it is determined in step 26 of FIG. 2 that the engine speed is not "0" (or more than the idling rpm), the TCU 18 reads the output of the speed sensor 12 in step 28 and the speed is increased. Search for "0 (stopped)".

If it is determined that the output of the speed sensing signal SS is "0", the TCU 18 performs step 34 described above. If it is determined that the speed sensing signal SS is not "0", the output TS of the throttle position sensor 17 is determined in step 30. Read to see if the throttle valve is open. Here, the open state of the throttle valve means that the throttle valve is opened beyond the opened state when the isle is rotated.

If the throttle valve is closed, the TCU 18 controls the shift of the automatic transmission to the neutral "N" position by performing step 34 described above. If the throttle valve is opened, the TCU 18 drives the drive mode in step 32. The shift control signal SCS to change the current to the automatic transmission 20 is supplied. At this time, the automatic transmission 20 changes the gear shift to the drive range in response to the shift control signal SCS of the drive position output from the TCU 18.

Therefore, the automatic transmission control apparatus according to the present invention automatically shifts the transmission when the brake pedal is released and the throttle valve is opened and the engine speed becomes higher than the idle rotation even if the position of the gear shift lever is in the neutral "N" position. By switching the mode from the neutral position to the drive position, there is no need to switch the shift lever, thereby increasing convenience in a vehicle with a handicapped person.

In addition, the present invention searches for the position of the gear shift lever to operate when the lever is in the neutral "N" position, but those skilled in the art may shift the shift position to the drive "D". It can be seen. In addition, it should be noted that even without the search process immediately operating without departing from the technical spirit of the present invention.

As described above, the present invention is applied to the handicapped vehicle by automatically switching the transmission selection to the drive mode when the brake is released even when the shift lever of the automatic transmission is in the neutral position and the engine rotation speed is greater than the idle rotation. The convenience of use can be increased, and the driving fuel efficiency can be improved by automatically switching the shift (select) automatically according to the stop or driving.

Claims (2)

In the control apparatus for a vehicle automatic transmission provided with an automatic transmission for selecting and shifting a gear corresponding to an input shift control signal, A brake sensor for detecting the depression of the brake, a rotation sensor for detecting the engine speed, and a throttle position sensor for detecting the opening amount of the throttle valve, Read the output of the brake sensor and rotation sensor in response to the shift lever being in the neutral position, and control the position of the automatic transmission to the drive position when the output of the throttle position sensor is in the throttle opening state with the brake released. Characterized in that it comprises a transmission controller to. 2. The control apparatus of an automatic transmission of claim 1, wherein the controller detects a position of the shift lever by an inhibit switch connected to the automatic transmission.