KR19980048170A - How to control the driving road of the vehicle - Google Patents

Abstract

The present invention is to estimate the inclination in accordance with the change in atmospheric pressure when running the vehicle to advance the ignition timing in proportion to it, so that the climbing running is carried out by the accelerator pedal operation, such as when driving on a flat surface so that stable driving performance can always be maintained The present invention relates to a driving control method of a climbing road of a vehicle.

Checking the voltage V _O output from the atmospheric pressure sensor;

Detecting whether the voltage V _O check time T _{C at} the above step reaches a preset reference time T _S ;

Calculating an average value V _{A of} variation of the output voltage V _O at the reference time T _S ;

Detecting the gradient G as the calculated output voltage average value V _A ;

Detecting an ignition timing correction value θ _O by the detected inclination G;

The configuration is characterized in that the ignition timing is controlled by correcting the ignition timing by the correction value detected in the above step.

Description

How to control the driving road of the vehicle

The present invention relates to a control method for improving the engine output by allowing the ignition timing to be automatically advanced when driving on the back of the vehicle.

In general, when the vehicle is traveling on the climbing road, the output is inferior to that when driving on the plain.

In other words, the air at high altitudes is less dense than at plains, so the combustion power is lowered at normal air-fuel ratios. At this time, the driver is accelerated because the engine is not driven solely by the engine driving force. You can compensate for the output by stepping on the pedal to increase the output.

However, the output compensation as described above not only obscures the driver's driving feeling, but also increases the fatigue of the driver by excessive pedal operation.

In view of the above problems, the present invention estimates the inclination according to the atmospheric pressure change during climbing, and advances the ignition timing in proportion to the climbing. It is an object of the present invention to enable operation.

Means of the present invention for achieving the above object

An engine control system for correcting a fuel supply amount by an electronic control device in response to a signal from an atmospheric pressure sensor,

Checking the voltage V _O output from the atmospheric pressure sensor;

Detecting whether the voltage V _O check time T _{C at} the above step reaches a preset reference time T _S ;

Calculating an average value V _{A of} variation of the output voltage V _O at the reference time T _S ;

Detecting the gradient G as the calculated output voltage average value V _A ;

Detecting an ignition timing correction value θ _O by the detected inclination G;

The configuration is characterized in that the ignition timing is controlled by correcting the ignition timing by the correction value detected in the above step.

1 is an atmospheric pressure change diagram according to an output change value from an atmospheric pressure sensor;

2 is a control flowchart according to the present invention.

※ Explanation of code for main part of drawing

V _O : output voltage

V _A : Output voltage average

V _S : vehicle speed

T _C : Check time

T _S : reference time

G: slope

Referring to this in more detail with reference to the accompanying drawings, Figure 1 shows the atmospheric pressure change according to the output change value from the atmospheric pressure sensor, the atmospheric pressure sensor is abbreviated as ELECTRONIC CONTROL UNIT (hereinafter, ECU) The analog voltage proportional to atmospheric pressure is outputted by the voltage of 5V supplied from and supplied to ECU again.

According to the present invention, the ignition timing is corrected by the output voltage V _O and the vehicle speed V _S as described above. Check the voltage V _O (step 1).

This voltage check is continued for a predetermined time, and it is determined whether the output voltage V _O check time T _C has reached the preset reference time T _S (step 2) and the reference time T _S. When is reached, the average value (V _A ) of the output voltage values checked up to then is calculated. (Step 3)

The average voltage value at this time is calculated by V _A = V _N (V ₁ + V ₂ + V ₃ + V ₄ ..) / T _S , and the calculated slope G is calculated by the calculated voltage average value V _A. Detection is performed by the formula V _A / (V _S (vehicle speed) * T _S ) (step 4).

Based on the detected slope inclination G, the correction value θ _{O of the} ignition timing is detected by the equation θ _B (basic ignition correction timing) * G (step 5). _The correction ignition timing is determined by _O ), and based on this, the ECU adjusts the ignition timing to be controlled (step 6).

In this way, the vehicle advances the ignition timing when the vehicle is climbing, and increases the output. When the ignition timing control is performed, the vehicle returns to the check step (step 1) of the first output voltage (V _O ). Repeat the ignition timing control step by step.

On the other hand, in order to enable immediate compensation for a change in the climbing angle during the control as described above, it is preferable that the check period of the atmospheric pressure is performed as short as possible, and the period is more preferably set to about 30 seconds.

As described above, the ignition timing control of the vehicle corrects the injection amount of fuel before the change in atmospheric pressure at the time of climbing the vehicle, and accordingly, the output at the time of driving is very low while the ignition timing is corrected. Regardless of the injection amount, the ignition timing is advanced so that the engine output can be increased.

Therefore, according to the present invention, it is possible to maintain a stable driving performance with the acceleration pedal operation force as in the flat while reducing the burden on the lack of output during the running on the back, so as to enjoy a high-power driving feeling and comfortable driving at the same time more precise vehicle control This will have a very beneficial effect.

Claims (5)

An engine control system for correcting a fuel supply amount by an electronic control device in response to a signal from an atmospheric pressure sensor, Checking the voltage V _O output from the atmospheric pressure sensor; Detecting whether the voltage V _O check time T _{C at} the above step reaches a preset reference time T _S ; Calculating an average value V _{A of} variation of the output voltage V _O at the reference time T _S ; Detecting the gradient G as the calculated output voltage average value V _A ; Detecting an ignition timing correction value θ _O by the detected inclination G; Correcting the ignition timing by the correction value (θ _O ) detected in the above step so that the ignition timing is controlled; Ramp driving control method of a vehicle, characterized in that the process consisting of. The method of claim 1, The above-mentioned output voltage (V _O ) average value is calculated as V _A = V _N (V ₁ + V ₂ + V ₃ + V ₄ ...) / T _S. The method of claim 1, Climbing slope is detected by G = V _A / (V _S * T _S ) in the above road running control method of the vehicle. The method of claim 1, The above-mentioned corrected ignition timing is detected by θ _O = θ _B * θ _O. The method of claim 1, The reference time, which is the atmospheric pressure check period, is set to 30 seconds.