JP2009138725A - Accelerator sensor signal conversion equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate accelerator operation during economy running in a vehicle with an electronically controlled throttle. <P>SOLUTION: Opening degree signals from an accelerator sensor of the vehicle with an electronically controlled throttle are attenuated for varying the opening degree of the electronic throttle to stepping quantity to an accelerator pedal. Accelerator operation during economy running is thus facilitated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronically controlled throttle for adjusting a fuel injection amount of a vehicle.

  A conventional accelerator sensor mounted on a vehicle detects the amount of depression of the accelerator with a hall element or the like, and outputs the amount of depression of the accelerator as a voltage to the vehicle engine computer. At this time, the throttle opening is determined by the engine computer from the obtained voltage, engine speed, speed, etc., the intake air amount and the fuel injection amount are adjusted, and the engine output is controlled.

  Next, a technique related to general throttle control will be described. In the “electronic throttle control device” disclosed in Japanese Patent Laid-Open No. 2002-309970 (Patent Document 1), an electronic throttle that opens and closes a throttle valve provided in an intake passage of an engine by a motor, and a target opening of an electronic slot are set. An accelerator pedal operated for setting, an accelerator sensor for detecting the accelerator opening of the pedal, and a computer for controlling the motor based on the accelerator opening detected for controlling the actual opening of the electronic throttle Prepare. The computer corrects the detected accelerator opening by giving a predetermined hysteresis width so that the magnitude differs depending on the path of change, and the corrected accelerator opening is adjusted by the electronic throttle for motor control. It is disclosed for use in control.

  In a “throttle valve control device” disclosed in Japanese Patent Application Laid-Open No. 11-200901 (Patent Document 2), an accelerator opening sensor that detects an accelerator opening according to a depression amount of an accelerator pedal, and the accelerator opening sensor In an electronically controlled throttle valve control device having a throttle motor that opens and closes the throttle valve according to the detected value of the accelerator, the moving speed of the accelerator pedal is detected from the detected value of the accelerator opening sensor, and then the detected accelerator speed The output value of the detection means is integrated. Then, the absolute value of the integrated value of the accelerator speed is compared with the reference value of the opening, and when the absolute value of the integrated value of the accelerator speed is equal to or larger than the reference value of the opening, the detected value of the accelerator position sensor is given a time difference to throttle Drive the motor. As a result, it is disclosed that driving feeling is improved.

  JP 2002-309970 A   Japanese Patent Laid-Open No. 11-200901

  For example, in the above-mentioned Patent Document 1, the detected accelerator opening is corrected by giving a predetermined hysteresis width so that the magnitude differs depending on the path of change, and the corrected accelerator opening is controlled by the motor. For this reason, there is a problem in that it is difficult to operate the accelerator because the relationship between the accelerator opening and the actual opening of the electronic throttle is not constant depending on the immediately preceding state and stepping speed even if the amount of depression is the same. there were.

  In Patent Document 2 described above, the moving speed of the accelerator pedal is detected, and then the detected output value of the accelerator speed detecting means is integrated. Then, the absolute value of the integrated value of the accelerator speed is compared with the reference value of the opening, and when the absolute value of the integrated value of the accelerator speed is equal to or larger than the reference value of the opening, the detected value of the accelerator position sensor is given a time difference to throttle Since the motor is driven, there is a problem that the response is deteriorated.

  An object of the present invention is to provide an accelerator sensor signal conversion device that solves such problems and facilitates an accelerator operation during eco-driving.

  According to claim 1 of the present invention, the above problem is solved by changing the electronic throttle opening with respect to the depression amount of the accelerator pedal by attenuating the opening signal of the accelerator sensor.

  According to the present invention, by attenuating the opening signal of the accelerator sensor, the ratio between the opening signal of the accelerator sensor and the depression amount can be changed from 1: 1 to 0.8: 1. This makes it easier to operate the accelerator during eco-driving.

BEST MODE FOR CARRYING OUT THE INVENTION

  Next, the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 1 is a block diagram when the accelerator sensor signal converter (1) is attached to the electronic control throttle (2). FIG. 2 shows the output voltage (V) of the accelerator sensor (4) and the accelerator opening (throttle opening). It is a graph of (degree) (%). The accelerator sensor signal converter main body (1) (hereinafter referred to as the main body (1)) includes a microcomputer (1c), an A / D converter (1b), a D / A converter (1a), a switch (1d), a light emitting element ( 1e) and a relay (1g). The relay (1g) uses the contact configuration (2c) to connect the output of the accelerator sensor (4) to the relay (1g) common 1 and to connect the input to the engine computer (3) to common 2. Normally closed (hereinafter referred to as NC) 1 and NC2 are connected, normally open (hereinafter referred to as NO) 1 is connected to the A / D converter (1b), and NO2 is connected to the D / A converter (1a).

  The voltage output from the accelerator sensor (4) is input to the microcomputer (1c) via the relay (1g) in the main body (1) and the A / D converter (1b). Thereafter, the microcomputer (1c) processes the input value, and outputs it to the engine computer (3) via the relay (1g) and the D / A converter (1a). The main body (1) thus configured is connected between the engine computer (3) and the accelerator sensor (4), the ignition key is turned on (engine stop), the accelerator pedal is fully closed, and the operation unit (1d) Press switch 1 (not shown). The value at this time is stored in the EEPROM (1f) as a fully closed state. Next, the accelerator pedal is fully opened, and the switch 2 (not shown) in the operation unit (1d) is pushed again. The value at this time is stored in the EEPROM (1f) as a fully opened state.

  FIG. 2 is a graph comparing the accelerator sensor output voltage (5) in a normal state with the accelerator sensor signal converter output voltage (6) of the present invention. (5) shows changes in the accelerator sensor output voltage when the fully closed voltage stored in the EEPROM (1f) is considered as 0% and the fully opened voltage as 100%. On the other hand, (6) is attenuated so that the output is half of the input when the accelerator opening is 50% from (5), and the damping start point is set to 10%, and linear interpolation is performed between the accelerator opening 50%. The change in the output voltage of the accelerator sensor signal conversion device when the firmware of the microcomputer is configured so that the acceleration end point is 70% and the accelerator opening is 50% linearly complemented is shown.

  The light emitting element (1e) is controlled by the microcomputer (1c) so that it is turned on from the attenuation start point to the attenuation end point and is extinguished in other areas. Needless to say, a mode selection function may be incorporated to switch between the ECO mode (control state) and the normal mode using a switch in the operation unit.

  As described above, the accelerator opening from 10% to 50% is changed from 10% to 25% on the output side, so the tread can be doubled and the accelerator work when accelerating during eco-driving can be fine-tuned. It can be easily performed. In addition, the attenuation start point, the attenuation end point, and the attenuation rate have been fixed, but a variable resistor is added to the operation unit so that the attenuation start point, attenuation end point, attenuation rate can be set arbitrarily, Needless to say, it may be attenuated at the same rate throughout.

  Next, in the second embodiment of the present invention, in order to make the eco-driving more aware, the light emitting element (1e) is set as a display unit such as a 7-segment or LCD, and the output value is set as an accelerator opening degree (%). The light emitting element (1e) may be blinked by displaying or providing a warning function. Furthermore, a sounding body such as a buzzer may be sounded when the attenuation start point is exceeded or, optionally, the operating point may be designated by the accelerator opening (%).

It is a block diagram of an accelerator sensor signal converter of the present invention. It is a graph of the output voltage of this invention accelerator sensor signal converter.

Explanation of symbols

1 Accelerator sensor signal converter
1a D / A converter
1b A / D converter
1c Microcomputer
1d operation unit
1e Light emitting device
1f EEPROM
1g relay
2 Throttle body
2a Throttle opening sensor
2b Throttle motor
3 Engine computer
4 Accelerator sensor
5 Accelerator sensor output voltage
6 Accelerator sensor signal converter output voltage

Claims (1)

An accelerator sensor signal conversion device characterized by changing an opening of an electronic throttle with respect to a depression amount of an accelerator pedal by attenuating and outputting an opening signal of an accelerator sensor.

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