JP2010261429A - Method for controlling accelerator sensor signal conversion device of electronic control throttle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for controlling an accelerator sensor signal conversion device of an electronic control throttle avoiding sudden acceleration in engine restart and eliminating trouble of resetting in the accelerator sensor signal conversion device of the electronic control throttle of a vehicle. <P>SOLUTION: This signal conversion device is installed between an accelerator pedal of a vehicle and an engine computer, and controls accelerator sensor opening signal of the electronic control throttle device. The device is provided with a plurality of set modes having different change quantities, sets one of the set modes as a standard mode, and controls the signal conversion device to return to the standard mode in restart after engine stop only when the set mode causing acceleration not less than the standard mode is set. Consequently, the method for controlling the accelerator sensor signal conversion device of the electronic control throttle improving safety by avoiding a state causing unexpected sudden acceleration even after restart after engine stop, and eliminating trouble of resetting is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for controlling an accelerator sensor signal converter for an electronically controlled throttle, and more particularly, to an accelerator sensor signal converter for an electronically controlled throttle that eliminates the need for troublesome acceleration avoidance and resetting when the engine is restarted. It relates to a control method.

  Conventionally, the throttle of a vehicle has been mechanically opened and closed by interlocking the depression of an accelerator pedal and a wire. In recent years, electronically controlled throttle devices that determine the opening of a throttle using an engine computer have become widespread in order to perform vehicle engine control with high accuracy. Such an electronically controlled throttle device controls the throttle opening so that an appropriate intake air amount and fuel injection amount are obtained in accordance with the engine speed, speed, and other signals in the engine computer according to the depression amount of the accelerator pedal. To do.

  Next, a technique related to general electronic throttle control will be described. In the “electronic throttle control device” disclosed in Japanese Patent Application 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 the electronic throttle 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 addition, in the “throttle valve control device” disclosed in Japanese Patent Laid-Open No. 11-200901 (Patent Document 2), an accelerator opening sensor that detects an accelerator opening according to the amount of depression of an accelerator pedal, and the accelerator opening In an electronically controlled throttle valve control device comprising a throttle motor that opens and closes a throttle valve in accordance with the detection value of the degree sensor, the movement speed of the accelerator pedal is detected from the detection value of the accelerator opening sensor, and then detected. The output value of the accelerator speed 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.

  By the way, in recent years, many drivers recognize that the driver's awareness of energy saving and fuel economy of the vehicle is remarkable, and that when the vehicle is driven, a gentle depression of the accelerator pedal leads to improved fuel efficiency. However, it is difficult to continue to execute unless the accelerator pedal is gently depressed at all times, and it has always returned to the original depression state of the accelerator pedal. Therefore, the applicant can easily change the throttle opening of the electronic throttle device with respect to the depression amount of the accelerator pedal by attenuating the accelerator sensor opening signal of the engine computer of the vehicle equipped with the electronic throttle device. An accelerator sensor signal conversion device capable of fuel-saving operation was invented before the filing of the present invention.

  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 (%). ). With this configuration, the accelerator opening is controlled so as to be attenuated. Therefore, even if the accelerator pedal is depressed as usual, the accelerator opening is set as a state where the accelerator pedal is naturally depressed gradually during fuel-saving operation. Therefore, it is possible to provide an accelerator sensor signal conversion device capable of producing an excellent effect of easily executing fuel-saving driving. In addition, in this configuration, the accelerator opening is attenuated for fuel-saving operation, but if the accelerator opening is amplified in the opposite direction, the accelerator pedal can be depressed in the same way as during normal driving. It is also possible to provide a setting mode in which a rapid acceleration can be obtained, so that it is possible to perform control suitable for sports running on a circuit or the like.

  FIG. 3 shows an example of a setting mode for the set value of the throttle opening configured as described above. Economy 1 (Ec1) for fuel-saving driving in the left direction with the normal state (nor) as the center. From 5 to 5 (Ec5), and 7 levels of setting modes from sport 1 (Sp1) to sport 7 (Sp7) suitable for sports driving in the right direction. Is shown. The detailed description of the configuration of FIG. 1 is the same as that of the control method of the accelerator sensor signal converter for the electronically controlled throttle according to the present invention, and will be omitted here because it will be described later in the embodiment.

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

  By the way, the accelerator sensor signal conversion device described above is configured such that the accelerator opening setting mode before the engine is stopped is stored even after restarting after the engine is stopped or returned to normal. Table 1 is a table showing a configuration in which the same mode is entered when restarting after the engine is stopped. In this case, there is no inconvenience of resetting every restart, but if the mode itself is set to economy 5 (Ec5) and the fuel economy setting is set to economy 5 (Ec5), it is the same as during normal driving. Even if the accelerator pedal is depressed in this way, the vehicle will start with gentle acceleration. However, if the mode is set to Sport 7 (Sp7), the accelerator pedal is depressed in the same way as during normal driving. There is a danger of starting with sudden acceleration.

  Table 2 shows a configuration in which the setting mode returns to normal when restarting after the engine is stopped. In this case, there is a hassle of resetting the setting mode at each restart, and when the setting mode is set to sports 7 (Sp7), the setting mode returns to normal (nor), so sudden acceleration occurs. However, if the setting mode is economy 5 (Ec5) and the fuel economy setting is set, the setting mode will return to normal (nor), so the accelerator pedal must be used in the same way as during normal driving. There is a danger of sudden start if you step on.

  Therefore, the present invention eliminates such problems, and an accelerator sensor signal conversion device for an electronically controlled throttle of a vehicle eliminates the troublesomeness of avoiding sudden acceleration and resetting when the engine is restarted. It aims at providing the control method of a sensor signal converter.

  A signal conversion device that is installed between an accelerator pedal of a vehicle and an engine computer and controls an accelerator sensor opening signal of an electronically controlled throttle device, and has a plurality of setting modes with different amounts of change, and any of the setting modes This is solved by controlling the signal conversion device so that it returns to the reference mode when the engine is restarted after the engine is stopped only when the reference mode is set to a setting mode that brings acceleration higher than the reference mode.

  A signal conversion device that is installed between an accelerator pedal of a vehicle and an engine computer and controls an accelerator sensor opening signal of an electronically controlled throttle device, and has a plurality of setting modes with different amounts of change, and any of the setting modes Since the signal converter was controlled to return to the reference mode when restarting after the engine was stopped only when the mode was set to a setting mode that brought acceleration beyond the reference mode as the reference mode, To provide a method for controlling an accelerator sensor signal conversion device for an electronically controlled throttle that eliminates the troublesomeness of resetting by improving the safety by avoiding sudden acceleration suddenly even after restarting It was possible.

It is a block diagram which shows the Example of this invention. It is a graph which shows the output voltage of the Example of this invention. It is a figure which shows the setting mode of an accelerator opening.

    An embodiment of a control method for an accelerator sensor signal converter for an electronically controlled throttle according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a graph of an output voltage (V) of an accelerator sensor (4) and a throttle opening (%). 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), an operation unit (1d), and a light emitting element. (1e), EEPROM (1f), and relay (1g). The relay (1g) connects the output of the accelerator sensor (4) to the relay (1g) normally closed (hereinafter referred to as NC) 1 to the A / D converter (1b) using a C-contact configuration, and the engine computer ( Connect the input to 3) to the common. Normally open (hereinafter referred to as NO) 1 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 input value is processed by the microcomputer (1c) and output to the engine computer (3) via the D / A converter (1a) and the relay (1g). 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 the 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. Although only one accelerator sensor signal is shown in FIG. 1, it goes without saying that if there are two, each input / output part (relay, A / D converter, D / A converter) should be prepared in two circuits. Yes.

  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 the change 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%. When the accelerator pedal is depressed, It is a normal state (nor) which accelerates. Further, the accelerator sensor signal converter output voltage (6) is set to a normal state (nor) in which the accelerator pedal is depressed to perform normal start and acceleration as shown in an example of the setting mode of the accelerator opening setting value in FIG. At the center, there are 5 levels from Economy 1 (Ec1) to Economy 5 (Ec5) for fuel-saving driving, and 7 levels from Sports 1 (Sp1) to Sports 7 (Sp7) suitable for sports driving in the right direction. It shows the change of the accelerator sensor output voltage in the mode. For example, if the setting mode is economy 4 (Ec4), the output is attenuated so that the output is half of the input when the accelerator opening is 50%, compared to the accelerator sensor output voltage side (5), that is, the normal state (nor). In order to compensate for the straight line between the 50% accelerator opening and the 50% accelerator opening, a linear interpolation is performed between the 50% accelerator opening and the 50% accelerator opening. The change of the accelerator sensor signal converter output voltage when a firmware is comprised is shown. Economy 1 (Ec1) to Economy 5 (Ec5) are configured to attenuate, but Sports 1 (Sp1) to Sports 7 (Sp7) are configured to amplify in reverse. The magnitude of the acceleration force in each setting mode is represented by an inequality symbol (<) in FIG. 3. For example, in the normal state (nor) and economy 1 (Ec1), economy 1 (Ec1) has the same accelerator. This means that the acceleration force is small relative to the amount of depression. On the contrary, the normal state (nor) and the sport 1 (Sp1) indicate that the sport 1 (Sp1) has a larger acceleration force for the same accelerator depression amount.

  Thus, if the setting mode is Economy 4 (Ec4), the accelerator opening from 10% to 50% is reduced from 10% to 25% on the output side, so that the tread is doubled and the fuel consumption is reduced. It is possible to easily perform accelerator work when accelerating during operation. Also, if the setting mode is sport 7 (Sp7), the accelerator opening from 10% to 50% will be from 10% to 84% on the output side, so the accelerator work when accelerating during sports running It can be easily performed. The attenuation start point, attenuation end point and attenuation factor, amplification start point, amplification end point and amplification factor have been fixed, but a variable resistor etc. has been added to the operation unit to attenuate or start amplification, attenuation or It goes without saying that the end point of amplification, attenuation or amplification factor may be arbitrarily set, or attenuation or amplification may be performed at the same rate throughout the entire area.

  The light emitting element (1e) is turned on from the attenuation start point to the attenuation end point, and is extinguished in other areas, and the accelerator opening is displayed on a numeric display (7 segments). Control by (1c). Needless to say, a setting mode selection function may be built in, and a setting mode (control state) for fuel-saving driving, a normal state, and a setting mode (control state) for sports driving may be switched by a switch in the operation unit.

  The accelerator sensor signal conversion device for an electronically controlled throttle configured as described above performs normal starting and acceleration by depressing the accelerator pedal, as shown in an example of a setting mode for setting the accelerator opening in FIG. 5 levels from economy 1 (Ec1) to economy 5 (Ec5) for fuel-saving driving, centering on the normal state (nor), from sports 1 (Sp1) to sports 7 (Sp7) suitable for sports driving in the right direction A seven-stage setting mode is provided and only one of the above-described setting modes is set as a reference mode, so that only after the engine is set to a mode that brings acceleration higher than the reference mode, re-starting after engine stop is performed. The signal converter is controlled to return to the reference mode at the start.

  Table 3 is a table showing a configuration in which the setting mode returns to the reference mode when the engine is restarted after the engine is stopped. In this embodiment, the reference mode is set as sport 3 (Sp3) in the sport running mode. In this case, as shown in Table 3, when the setting mode before stopping the engine is sport 7 (Sp7), the setting mode is changed to sport 3 (Sp3) after the engine is restarted. In the sport 3 (Sp3) setting mode, the acceleration by depressing the accelerator pedal is a slower setting mode than in the sport 7 (Sp7) setting mode, and an acceleration that is less gradual than normal (nor) is obtained. Therefore, rapid acceleration can be avoided without a sense of incongruity. In addition, when the setting mode before the engine stop is sport 2 (Sp2), the reference mode is sport 3 (Sp3). Therefore, after the engine is restarted, the state of sport 2 (Sp2) is maintained and the travel after the restart Sometimes there is no sense of incongruity. Further, even in the case of economy 5 (Ec5), there is no sense of incongruity when traveling after restarting in the same manner as described above. As described above, according to the present invention, even after restarting after the engine is stopped, it is possible to avoid a state of inadvertent sudden acceleration, thereby improving safety and eliminating the troublesomeness of resetting. It is possible to provide a method for controlling an accelerator sensor signal conversion device for an electronically controlled throttle that has no noise.

DESCRIPTION OF SYMBOLS 1 Accelerator sensor signal converter main body 1a D / A converter 1b A / D converter 1c Microcomputer 1d Operation part 1e Light emitting element 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)

  A signal conversion device that is installed between an accelerator pedal of a vehicle and an engine computer and controls an accelerator sensor opening signal of an electronically controlled throttle device, and has a plurality of setting modes with different amounts of change, and any of the setting modes Accelerator sensor signal conversion of the electronically controlled throttle that controls the signal conversion device to return to the reference mode when restarting after the engine stops only when the mode is set to a setting mode that brings acceleration above the reference mode Control method of the device.

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