KR19980036557A - One-way clutch failure diagnosis device and diagnosis method - Google Patents

Abstract

The present invention relates to a one-way clutch failure diagnosis apparatus, comprising: vehicle state detecting means for detecting a variable output according to a change in state of a vehicle and outputting different signals; It is composed of a shift control means for receiving the signal output from the vehicle state detection means and comparing it with the set data and outputting a fault code when other data is applied, comparing the rotational speed of the input element with the rotational speed of the output element. By determining whether the one-way clutch has failed early and outputting the corresponding failure code, there is an effect of preventing secondary damage due to the failure of the one-way clutch.

Description

One-way clutch failure diagnosis device and its diagnosis method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one way clutch (OW C) failure diagnosis device and a method for diagnosing the same, and more particularly, for starting and driving in an automatic transmission vehicle equipped with a one way clutch according to a need of a driving element. The present invention relates to a one-way clutch failure diagnosing device and a method for diagnosing a failure in which a braking effect is lost in both directions of a one-way clutch and recording the self-diagnosis code.

In general, a one-way clutch is assembled between a carrier of a planetary gear set and a line sensor in a sprag manner, and the other is assembled to a stator of a torque converter.

The one-way clutch in the franchise gear set rotates the clockwise clockwise when the pinion rotates clockwise at speed 1 in the 'D' or '2' range, thus preventing the carrier from turning in the counterclockwise direction. It is transmitted to Enuras gear of Atheri gear set.

Therefore, the carrier coupled to the outer race of the one-way clutch can be rotated clockwise only, and the engine rotates clockwise when the engine brake is rotated from the ENG line gear side at the 'D' or '2' range 1 speed. Make sure that the engine brake is not activated and the shifting between 1st and 2nd speed is smooth.

In addition, the one-way clutch in the torque converter prevents the stator from rotating in the counterclockwise direction, so that the torque is increased by the stator.

However, the above-described conventional technique has not been known the cause of the failure when the one-way clutch occurs, there is a problem that the secondary damage of the other element occurs as the one-way clutch reverses.

Therefore, to solve the above-mentioned conventional problems, by comparing the rotational speed of the input element and the rotational speed of the output element to determine whether the one-way clutch has failed early and output the corresponding failure code, resulting from the failure of the one-way clutch. Provided are a one-way clutch failure diagnosis device and a diagnosis method thereof capable of preventing secondary damage of other elements.

The present invention for achieving the above object, the vehicle state detection means for detecting that the output is different from the variable according to the change of the vehicle;

It is characterized in that it comprises a shift control means for outputting a failure code when other data is applied to compare the set data received by the signal output from the vehicle state detection means is applied.

Another object of the present invention for achieving the above object is the step of receiving and reading the signal output from the vehicle state detection means; Determining whether the shift stage is in the first speed state; Determining whether the transmission is completed; Calculating a gear shift ratio by a set arithmetic formula; Comparing and determining the gear shift ratio calculated above with the set gear shift ratio; And outputting a self-diagnosis code in accordance with the above determination.

1 is a block diagram of a one-way clutch failure diagnosis device configuration,

2 is a flowchart illustrating a method of diagnosing a one-way clutch failure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention, which can be achieved and realized in detail by the above objects, will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the vehicle state detecting means 10 includes a turbine shaft rotation speed sensing unit that outputs a corresponding electric signal for sensing the rotation speed of a turbine shaft located in a torque converter that transmits power output from an engine to a transmission. (11); A transmission output rotation speed detection unit (12) for sensing the rotational speed of the power transmitted from the turbine shaft to the transmission through a transmission and outputting a corresponding electric signal; The shift stage detection unit 13 detects a shift stage that varies according to a driving state of the vehicle and outputs a corresponding electric signal.

The operation of the one-way clutch failure diagnosis method according to the embodiment of the present invention by the above configuration is as follows.

When the vehicle starts to drive and shift synchronism occurs at the shift stage, the shift control means 20 includes a turbine shaft rotation speed detection unit 11 and a transmission output detection unit of the vehicle state detection unit 10 shown in FIG. 1. A signal output from the 12 and the shift stage 13 is received and read (S100).

It is determined whether the state of the shift stage is the first speed state among the signals read above (S110).

If the shift stage is not in the first speed state, the process returns to the initial state.

However, when the shift stage is in the first speed state, the shift control means 20 determines whether the shift synchronization generated above is completed (S120).

When the shift synchronization is completed in the above, the shift control means 20 calculates the transmission ratio SR of the current vehicle by calculating the turbine shaft rotation speed Nt and the transmission output rotation speed No by the set formula. (S130).

However, if the shift synchronization is not completed in the above, it returns to the initial state.

The formula for calculating the transmission ratio SR of the vehicle by the formula set above is as follows.

Vehicle speed ratio (SR) = turbine shaft speed (Nt) / transmission output speed (No)

The shift control means 20 compares and determines the shift ratio SR of the vehicle calculated above and the set first speed ratio SR1ST (S140).

When the shift ratio SR of the vehicle calculated by the formula set above is greater than the set first speed ratio SR1ST, the shift control means 20 determines that the one-way clutch has failed and shift control the corresponding fault coat. It is stored in the memory of the means 20 (S150).

However, when the speed ratio SR of the vehicle is smaller than the set first speed ratio SR1ST, the shift control means 20 determines that the one-way clutch is in a normal state and returns to the initial state.

Therefore, the fault code stored above informs the mechanic or the operator of the exact fault position and the fault part through the simulator.

The above embodiments are described as the most preferred embodiments, and the present invention is not limited thereto, and the embodiments can be easily described from the above embodiments.

As described above, by comparing the rotational speed of the input element and the rotational speed of the output element in the embodiment of the present invention to determine whether the one-way clutch is broken early and output the corresponding failure code, the other way caused by the failure of the one-way clutch A one-way clutch failure diagnosis apparatus and its diagnostic method that can prevent secondary damage of the element can be provided.

Claims (3)

Vehicle state detecting means for detecting a variable output according to a state change of the vehicle and outputting different signals; And a shift control means for comparing the set data by receiving the signal output from the vehicle state detecting means with the set data and outputting a fault code when other data is applied. A turbine shaft rotational speed sensing unit for outputting a corresponding electric signal for sensing the rotational speed of the turbine shaft located in the torque converter for transmitting the power output from the engine to the transmission; A transmission output rotation speed detection unit configured to output a corresponding electric signal by sensing a rotation speed of the power transmitted from the turbine shaft to the transmission through a transmission; One-way clutch failure diagnosis device comprising a shift stage detection unit for detecting a shift stage that varies according to the driving state of the vehicle and outputs a corresponding electric signal. Receiving and reading a signal output from the vehicle state detecting means; Determining whether the shift stage is in the first speed state; Determining whether the transmission is completed; Calculating a gear shift ratio by a set arithmetic formula; Comparing and determining the gear shift ratio calculated above with the set gear shift ratio; And a step of outputting a self-diagnosis code in accordance with the above determination.