KR20120029109A - Throttle control method for improving fuel efficiency of a vehicle - Google Patents

Abstract

PURPOSE: A throttle control method for reducing the fuel consumption of a vehicle is provided to optimize the operation of a vehicle using real-time fuel information regardless of the operation of an accelerator. CONSTITUTION: A throttle control method for reducing the fuel consumption of a vehicle is as follows. An ECU(electronic control unit) of an ETS(electronic throttle system) confirms whether an accelerator is operated or not by receiving the displacement information of the accelerator from an electronic accelerator system(S20). The displacement value of the accelerator and the real-time speed value of a vehicle received from the ECU are compared with a pre-set reference displacement value and a reference speed value(S40).

Description

Throttle Control Method for Improving Fuel Efficiency of a Vehicle

The present invention relates to a throttle control system for reducing fuel efficiency of an automobile, and more particularly, to measure the fuel economy of an automobile in real time, and then, based on the measured fuel efficiency, an opening degree of a throttle for adjusting an air flow rate into an engine. The present invention relates to a throttle control method that helps economical operation by controlling.

In general, the acceleration and deceleration of the vehicle is determined by the driver's accelerator operation, and the speed of the vehicle is determined by the appropriate gear shift and the operation of the accelerator.

In the case of a vehicle equipped with an electronic throttle system (ETS), when the driver operates the accelerator while the engine is running at idling state in order to accelerate and drive the vehicle, the accelerator position sensor is activated. The manipulated variable is sensed and sent to the electronic control unit (ECU). Various sensors are attached to the vehicle, and these various sensors detect and check the current speed, coolant temperature, engine speed, throttle opening degree, air flow, oxygen amount, and the like.

The state values measured by each sensor are transmitted to the electronic control unit (ECU), and the electronic control unit (ECU) injects fuel to the cylinder of the engine at a predetermined value based on these information so that the vehicle is accelerated and driven. .

In the related art, when the driver steered the accelerator in order to rapidly accelerate the vehicle in a stopped or other state, the throttle opening degree drastically changed according to the value of the accelerator position sensor.

In such a case, in order to accelerate rapidly in the electronic control unit (ECU) according to the throttle opening, more fuel is injected through the injector, thereby increasing fuel consumption and worsening fuel economy.

Currently, there are many devices that display fuel efficiency using information of various sensors entering the electronic control unit (ECU) in order to help drivers drive economically, but this is because the driver has to continue driving by looking at the dashboard or fuel economy display. There is a problem that there is a high risk of accidents due to dispersal and distractions, and the driver's fatigue is increased because the driver has to keep paying attention.

Korean Patent Publication No. 2001-0003227 "Electronic Throttle Control System and Its Control Method" Patent Publication No. 1999-020122 "Electronically Controlled Throttle Valve Control System" Korean Patent Publication No. 10-2008-0015282 "Vehicle Electronic Throttle Control Device and Method" Patent No. 0337828 "Air-fuel ratio control method by throttle position sensor"

The present invention is to solve the above-mentioned conventional problems, the object of the present invention is to accelerate to the optimum fuel economy automatically using the real-time fuel efficiency information of the vehicle, regardless of the amount of operation of the driver's accelerator when the driver wants to drive economic And to provide a throttle control method for driving.

In order to achieve the above object of the present invention, in the present invention, the electronic control unit (ECU) for controlling the engine and peripheral devices of the vehicle, the electronic accelerator system (EAS) for detecting the driving displacement of the accelerator, the opening amount of the throttle valve A method of controlling a throttle using a throttle control system comprising an electronic throttle system (ETS) for adjusting the electronic throttle system (ETS) and an electronic throttle system electronic control unit (ETS ECU) which calculates a throttle opening value and communicates bidirectionally with the electronic throttle system. The electronic throttle system electronic control unit (ETS ECU) receiving the drive displacement information of the accelerator output from the electronic accelerator system (EAS) while the vehicle is turned on to determine whether the accelerator is operated; b) The drive displacement value of the accelerator received by the electronic throttle system electronic control unit (ETS ECU) and the real-time speed value of the vehicle received from the electronic control unit (ECU) are compared with the preset reference drive displacement value and the reference traveling speed value, respectively. Determining; And c) various sensors received by the electronic throttle system electronic control unit (ECS) from the electronic control unit (ECU) when both the driving displacement value of the accelerator and the real-time speed value of the vehicle are equal to or greater than the reference driving displacement value and the reference driving speed value. Calculate the real-time fuel economy using the signal information of the driver and output the calculated throttle opening value by CAN communication to the electronic throttle system (ETS) to drive the car with the optimum fuel economy. When any one of the real-time speed value of the is less than the reference drive displacement value or the reference travel speed value, the electronic throttle system as the electronic throttle system by the electronic throttle system electronic control unit (ETS ECU) receives the drive displacement value of the accelerator received from the electronic accelerator system (EAS). Outputting to the ETS and controlling the accelerator displacement and the throttle opening in a 1: 1 ratio. The throttle control method for the fuel efficiency of the vehicle, characterized in that W is made available.

At this time, after the step c), when the accelerator's drive displacement value is zero because there is no operation of the accelerator for a predetermined time while the real-time speed value of the vehicle is equal to or greater than the reference traveling speed value, the electronic throttle system electronic control unit (ETS ECU) The step (d) of outputting the throttle opening value for the constant speed running by the CAN communication to the electronic throttle system (ETS) may be further included.

Here, the reference drive displacement value is a value when the actual drive displacement of the accelerator corresponds to 30% of the entire driveable displacement range, and the reference travel speed value is preferably 20 km / h.

Here, the electronic throttle system electronic control unit (ETS ECU) determines the inclination of the road surface based on the information received from the inclination sensor 500, and after correcting and calculating the throttle opening value according to the inclination value, the electronic throttle system (ETS) It is preferable to further include the step of outputting by CAN communication.

On the other hand, when the electronic throttle system electronic control unit (ETS ECU) receives the brake value from the electronic control unit (ECU) further comprises the step of outputting the throttle valve closing value to the electronic throttle system (ETS) by CAN communication.

According to the present invention, when the driver wants to drive economically, the driver can automatically perform the optimum acceleration and driving regardless of the driver's accelerator operation amount, so that the driver can operate the accelerator more than a certain speed. If you stop, you can drive at a steady speed, which also increases the driver's convenience and improves fuel economy.

In addition, there is an advantage that it is easy to determine whether there is an abnormality of the engine and the power transmission system of the vehicle by using the learning function and the tilt sensor value of the electronic throttle system electronic control unit (ETS ECU).

1 is an operation flowchart of a throttle control method according to a preferred embodiment of the present invention.
2 is a block diagram of a throttle control system according to a preferred embodiment of the present invention.

In the following description, in order to understand the gist of the present invention, a detailed description thereof will be omitted for technical matters widely known in the art or additional information that may be unnecessarily obscure the gist of the present invention.

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

In the present invention, when the driver operates the accelerator to drive the vehicle, an electronic throttle system electronic control unit (ETS ECU) capable of controlling the throttle opening degree in order to enable the driver to accelerate or drive at an optimum fuel economy regardless of the accelerator operation amount. It includes. The electronic throttle system electronic control unit (ETS ECU) is connected to the electronic throttle system (ETS) by a controller area network (CAN) to transmit and receive signals.

As shown in Fig. 2, the throttle control device for implementing the present invention is largely based on the position value (driving displacement) of the electronic control unit (ECU) 100, which is a kind of integrated controller basically mounted on a vehicle, and an accelerator. Output electronic accelerator system (EAS, 200), electronic throttle system (ETS, 400) for controlling the throttle drive for opening and closing of the throttle valve mounted on the throttle body of the vehicle, CAN communication with the electronic throttle system (ETS) Electronic throttle system (ETS ECU, 300) connected by the two-way communication is configured to include a tilt sensor (Tilt Sensor, 500) for detecting the inclination of the ground ground the wheel of the vehicle.

The electronic control unit (ECU) outputs information of various sensors necessary for calculating fuel economy and controlling the throttle in the electronic throttle system electronic control unit (ETS ECU).

The electronic accelerator system EAS outputs an accelerator position value by the driver's operation to the electronic throttle system electronic control unit (ETS ECU). In the following, the accelerator position value is also expressed by the term of the accelerator driving displacement value, and both are found to be the same concept.

The inclination sensor 500 is used to determine the inclination value of the road surface (hereinafter, also referred to as an inclination value, both of which are the same concept) in order to determine whether the ground of the direction in which the vehicle is going is flat, uphill, or downhill. This is for output to the throttle system electronic control unit (ETS ECU).

The electronic throttle system electronic control unit (ETS ECU) calculates fuel efficiency in real time using signals of various sensors output from the electronic control unit (ECU), and the position value and tilt sensor of the accelerator output from the electronic accelerator system (EAS). After determining the inclination value of 500), the throttle opening value is output by CAN communication to the electronic throttle system (ETS).

The electronic throttle system (ETS) drives the throttle valve in accordance with the throttle opening value, which is an output value of the electronic throttle system electronic control unit (ETS ECU), and re-opens the opening value of the driven throttle valve by CAN communication. Output to ECU).

Hereinafter, a method of controlling the opening degree of a throttle valve using a throttle control device having the above configuration will be described in detail with reference to FIGS. 1 and 2.

As shown, the throttle control operation according to the present invention is started by the driver starting the car to drive the car. (S10)

When the vehicle is started and the operation is started, the electronic throttle system electronic control unit (ETS ECU) receives the accelerator position information from the electronic accelerator system (EAS) to determine the driving displacement value of the accelerator (S20). If the operation is not done, the drive displacement of the accelerator is defined as zero.

If the received drive displacement value of the accelerator is not zero, the electronic throttle system electronic control unit (ETS ECU) compares the drive displacement value of the accelerator and the real-time speed value of the vehicle received from the electronic control unit (ECU) with respective reference values. The driving method of the throttle valve is determined. (S40)

The electronic throttle system electronic control unit when the accelerator drive displacement value received by the electronic throttle system electronic control unit (ETS ECU) from the electronic accelerator system (EAS) is greater than or equal to the reference drive displacement value, and the real-time speed value of the vehicle is greater than or equal to the reference travel speed value. (ETS ECU) calculates real-time fuel economy by using signals from various sensors output from the electronic control unit (ECU), and can set the throttle opening value to the electronic throttle system (ETS) to accelerate the vehicle with the optimal fuel economy. Output by communication. (S50)

In this case, the accelerator driving displacement refers to the degree of the actual accelerator pedal is pressed on the basis of the total play that the accelerator pedal can be pressed, in the embodiment of the present invention of the entire displacement range that can drive the reference drive displacement value of the accelerator It is preferable to set it as 30%. In addition, it is preferable that the reference traveling speed value of the vehicle is 20 km / h.

In the above fuel economy driving mode S50, as described above, the electronic throttle system electronic control unit (ETS ECU) outputs a suitable throttle opening value to the electronic throttle system EST so that the vehicle runs at the optimum fuel economy. In the present invention, the optimum fuel economy (including the acceleration curve that can accelerate as quickly as possible with the same amount of fuel) in the tolerance state and the maximum loading state of the vehicle in order to drive the vehicle at the optimum fuel economy, and then Drive the vehicle based on the data. Accordingly, in the present invention, when the reference drive displacement value of the accelerator is 30% or more of the entire driveable displacement range and the reference travel speed value of the vehicle is 20km / h or more, the electronic throttle system is used to allow the vehicle to travel at a predetermined optimal fuel economy. The control unit (ETS ECU) calculates and outputs the throttle opening value. Therefore, the driver does not need to continue to look at the instrument panel or fuel economy display as in the prior art, and the driver can operate economically with optimum fuel economy only by simple on / off operation of the accelerator pedal.

Electronic Throttle System The electronic throttle system electronic control unit (ETS ECU) can be used if the accelerator drive displacement value received from the electronic accelerator system (EAS ECU) is less than 30% or if the vehicle's real-time speed is less than 20 km / h. The drive displacement value (position value) of the accelerator received from the electronic accelerator system EAS is output as it is to the electronic throttle system ETS. Therefore, in this case, the drive displacement of the accelerator and the throttle opening degree are controlled in proportion to 1: 1. In other words, the opening value of the throttle valve also increases or decreases in proportion to the driving displacement value of the accelerator output from the electronic accelerator system (EAS).

On the other hand, when the accelerator is not operated, the electronic throttle system electronic control unit (ETS ECU) determines the driving speed of the vehicle using the real-time speed value of the vehicle output from the electronic control unit (ECU). )

If the real-time speed value of the vehicle output from the electronic control unit (ECU) by the electronic throttle system electronic control unit (ETS ECU) is not more than 20 km / h (the reference driving speed value) while the accelerator is not operated, the throttle opening value for constant speed driving is determined. Output by CAN communication to electronic throttle system (ETS).

In the fuel consumption driving mode S50 or the constant speed driving mode S70, the inclination sensor 500 measures the road inclination value (tilt value) in the traveling direction of the vehicle. When the determined inclination value is close to the flat ground, the regular mileage and the real-time traveling fuel economy which are learned and stored in the electronic throttle system electronic control unit (ETS ECU) during normal driving are compared. At this time, if the real-time driving fuel economy is normally learned and there is a large difference from the stored fuel economy, that is, even though a certain fuel economy is required compared to the learning fuel economy stored in the electronic throttle system electronic control unit (ETS ECU), the acceleration or the traveling speed is When it is slow, it can be determined that there is a problem with the engine and the power train.

In an uphill slope with a large gradient value, the electronic throttle system electronic control unit (ETS ECU) outputs the throttle opening value modified according to the gradient value to the electronic throttle system (ETS). In this case, the larger the gradient value, the greater the output throttle opening value.

When the slope is small, the electronic throttle system electronic control unit (ETS ECU) determines the real-time driving speed of the vehicle and outputs the modified throttle opening value by the electronic throttle system (ETS) when the current vehicle acceleration is greater than the flat. In this case, the steeper the downhill slope, the smaller the throttle opening value.

When the electronic throttle system electronic control unit (ETS ECU) receives the brake signal from the electronic control unit (ECU), the throttle valve closing value is output to the electronic throttle system (ETS) by CAN communication during any of the above operations.

The present invention relates to a control method for controlling the opening value of the throttle valve to the optimum situation in order to reduce the fuel economy of the vehicle, the utilization of the automobile in the field of automobiles in consideration of increasing oil prices and environmental pollution caused by vehicles It is expected to be high.

100: electronic control unit (ECU)
200: electronic accelerator system (EAS)
300: electronic throttle system electronic control unit (ETS ECU)
400: Electronic Throttle System (ETS)
500: tilt sensor

Claims (5)

Electronic control unit (ECU) for controlling vehicle engines and peripherals, electronic accelerator system (EAS) for detecting drive displacement of accelerator, electronic throttle system (ETS) for adjusting opening amount of throttle valve, throttle opening A method of controlling a throttle using a throttle control device comprising an electronic throttle system electronic control unit (ETS ECU) which calculates a value and communicates bidirectionally with an electronic throttle system.
a) the electronic throttle system electronic control unit (ETS ECU) receiving the drive displacement information of the accelerator output from the electronic accelerator system (EAS) and determining whether the accelerator is operated when the vehicle is turned on;
b) The drive displacement value of the accelerator received by the electronic throttle system electronic control unit (ETS ECU) and the real-time speed value of the vehicle received from the electronic control unit (ECU) are compared with the preset reference drive displacement value and the reference traveling speed value, respectively. Determining; And
c) If both the drive displacement value of the accelerator and the real-time speed value of the vehicle are equal to or greater than the reference drive displacement value and the reference traveling speed value, the electronic throttle system electronic control unit (ETS ECU) of the various sensors received from the electronic control unit (ECU) Calculate the real-time fuel economy using the signal information and output the calculated throttle opening value by CAN communication to the electronic throttle system (ETS) to drive the car with the optimum fuel economy. When any one of the real-time speed values is less than the reference drive displacement value or the reference travel speed value, the electronic throttle system (ETS ECU) receives the drive displacement value of the accelerator received from the electronic accelerator system (EAS) as it is. Output to ETS) to control the accelerator displacement and throttle opening to 1: 1
Throttle control method for reducing fuel consumption of the vehicle, characterized in that comprises a. The method of claim 1,
After step c),
If the drive displacement value of the accelerator is zero because the accelerator is not operated for a predetermined time in a state where the real-time speed value of the vehicle is equal to or greater than the reference traveling speed value, the electronic throttle system electronic control unit (ETS ECU) causes the throttle for constant speed driving. The throttle control method for reducing the fuel economy of the vehicle further comprises the step (d) of outputting the opening value by the CAN communication to the electronic throttle system (ETS). The method according to claim 1 or 2,
The reference drive displacement value is a value when the actual drive displacement of the accelerator corresponds to 30% of the total displacement range that can be driven, and the reference travel speed value is 20 km / h, throttle control for reducing fuel economy of the vehicle Way. The method according to claim 1 or 2,
After the electronic throttle system electronic control unit (ETS ECU) determines the inclination of the road surface based on the information received from the inclination sensor 500, the throttle opening value is corrected and calculated according to the inclination value, and then CAN is converted into the electronic throttle system (ETS). A throttle control method for reducing fuel consumption of the vehicle, characterized in that it further comprises the step of outputting by communication. The method according to claim 1 or 2,
And when the electronic throttle system electronic control unit (ETS ECU) receives the brake value from the electronic control unit (ECU), outputting the throttle valve closing value to the electronic throttle system (ETS) by CAN communication. Throttle control method for reducing the fuel economy of the vehicle.

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