VARIABLE VOLTAGE REGULATOR FOR ELECTRONIC AUTOMOBILE ACCELERATOR

Abstract: The present invention is a Variable Voltage Regulator for Electronic Accelerator in Automobile which comprises an ECU power potential stabilizing circuit and an ECU reference potential stabilizing circuit. The ECU power potential stabilizing circuit eliminates the noise and stabilizes voltage variation occurred when the electrical parts of automobile are activated by the power supplied through the ECU of the electronic accelerator, by impressing it to the power supply line and variable voltage supply line. The ECU reference potential stabilizing circuit eliminates the unnecessary spark noise and harmonics noise occurred on the power supply line, reference potential line and variable voltage supply line, by impressing it to the variable voltage supply line and reference potential line. If further stabilizes the voltage supplied to the ECU by compensating the voltage fluctuated due to disturbances.

Description: VARIABLE VOLTAGE REGULATOR FOR ELCTRONIC AUTOMOBILE ACCELERATOR Technical Field The present invention relates to a Variable Voltage Regulator for Electronic Accelerator in Automobile which is designed to stabilize the voltage supplied to the variable voltage controller of the accelerator in the electronically-controlled automobile engine which controls the power of the automobile by controlling the throttle valve with the electronics control unit (ECU). Background Art As disclosed in the official Patent Disclosure 97-35982(Jul. 22, 1997) for general automobile engines which controls throttle valve with the ECU, voltage fluctuation ratio of the variable resister (13), whose resisting value varies according to the accelerator when the driver operates the accelerator, is inputted to the ECU and pulse voltage isl created. When the said pulse voltage is transmitted to the solenoid control unit (15), the said solenoid control unit (15) activates the solenoid with respect to the number of pulses. Then, it controls the amount of burning gas that flows in the engine so that the driver may produce maximum engine power efficiently. In general, an automobile engine supplies electric power created from the generator to the battery and the battery distributes electric power to all electronic parts in the automobile. As shown in Fig. 1, for automobiles that increase and decrease the engine power with the electronic accelerator, the power supply line (10) of the variable resister (13) and the reference potential line (11) are connected to both ends of the variable resister to maintain specific resisting value when the driver operates the accelerator. The voltage value of the said variable resister (13) varies according to the operation by the automobile driver, voltage varies due to the power supply line (10) connected to the ECU (14), the voltage varied at the variable voltage supply line (12) is supplied to the said ECU (14), the said ECU (14) recognizes the voltage and transmits the pulse signal to the solenoid control unit (15) and the said solenoid control unit (15) activates the solenoid (16) so that the driver may control the engine power by opening and closing the throttle valve (not depicted in the drawing) mechanically connected to the solenoid Disclosure of Invention In the above electronically-controlled engine, although fixed voltage shall be supplied to the variable resistance, the automobile is loaded with a higher overflowing lighting load than the rated current in such a case when the lights are on. This causes the voltage supplied to the generator or the battery to drop suddenly. This further causes electronics noise such as harmonics noise and spark noise to flow in the power of the control system of the automobile which uses a lot of electronic parts, relays and electronic control circuits that are composed of many electric parts and semiconductors. The voltage supplied to the variable resistance of the accelerator varies according to the type of automobile, but fixed voltage of 5N or 12N is necessary so that the driver can control the engine power to the desired level. Otherwise, the power voltage supplied to the variable resistance of the accelerator fluctuates due to the electrical characteristics of the above-mentioned automobile parts, the voltage between the ground and the reference potential fluctuates and unnecessary noise is created so that the engine does not operate according to the driver's intention and power control by ECU is not stable. This will consequently increase the gas consumption in the engine, creating air pollution due to unstable combustion as well as decreasing the riding comfort of the automobile. To solve the said problems in current automobiles, the present invention is directed to a variable voltage regulator for electronic accelerator in automobile which comprises: an ECU power potential stabilizing circuit which eliminates the noise and stabilizes voltage variation occurred when the electrical parts of automobile are activated by the power supplied through the ECU of the electronic accelerator, by impressing it to the power supply line and variable voltage supply line; and an ECU reference potential stabilizing circuit which eliminates the unnecessary spark noise and harmonics noise occurred on the power supply line, reference potential line and variable voltage supply line, by impressing it to the variable voltage supply line and reference potential line. It further stabilizes the voltage supplied to the ECU by compensating the voltage fluctuated due to disturbances. Brief Description of the Drawings Fig. 1 is an illustrative drawing of the conventional electronic automobile accelerator. Fig. 2 is a circuit diagram of the present invention. Best Mode for Carrying Out The Invention The functions and structure of the present invention as depicted in the drawings are as follows: As seen in Fig. 2, the variable voltage regulator (100) for electronic accelerator in automobile comprises; an ECU power potential stabilizing circuit (200) which eliminates the noise transmitted from the power supply line (10) and stabilizes voltage fluctuation of the power supply line; and an ECU reference potential stabilizing circuit (300) which stabilizes the noise and voltage fluctuations that occur between the reference potential line (11) and ground and between the variable voltage supply line (12) and the reference potential line (11). Referring now to the circuit diagrams of the ECU power potential stabilizing circuit (200) and the ECU reference potential stabilizing circuit (300), a variable resistance (13) and a cathode of diode 1 (hereinafter to be called "Dl") are connected in parallel with the power supply line (10). Capacitors (hereinafter to be called "CI") are connected to both ends of the Dl, an anode of Dl is connected to the resistance (hereinafter to be called "Rl"), the anode of diode 2 (hereinafter to be called "D2") is connected to capacitor 2 (hereinafter to be called "C2"), one end of the C2 is earthed, one end of the Rl is connected to the branch point "N" of the variable voltage supply line (12) and the cathode of D2 is connected to the branch point "O." The anode of diode 3 (hereinafter to be called "D3") and resistance 2 (hereinafter to be called "R2") are connected to the branch point "O" whereas the cathode of D3 is earthed to one end of the R2. One end of capacitor 3 (hereinafter to be called C3) connected to the branch point "N" of the said variable voltage supply line (12) is connected to the branch point "Q" of the reference potential line, one end of the resistance 3 (hereinafter to be called "R3") connected to the branch point "O" of the said variable voltage supply line (12) is connected to the cathode of diode 4 (hereinafter to be called "D4") and the anode of D4 is connected to the branch point "P" of the said reference potential line (11). Finally, one line of C4 is connected to the branch point "P" of the reference potential line while the other one line is connected to the resistance 4 (hereinafter to be called "R4") and R4 is connected to the anode of diode 5 (hereinafter to be called "D5") and the cathode of diode 6 (hereinafter to be called "D6"). The cathode of D5 and the anode of D6 of the cathode connect the anode of the diode 7 (hereinafter to be called "D7") and the cathode of diode 8 (hereinafter to be called "D8") whereas the cathode of D7 and the anode of D8 are earthed. The above ECU power potential stabilizing circuit (200) eliminates the harmonics noise and spark noise transmitted to the said power supply line (10) by absorbing them to the earth through CI and C2. The voltage supplied from the said power supply line (10) is connected to the variable resistance supply line through Dl, Rl and the branch point "N." It is finally earthed through the R2 after it passed the branch point "O." Although the resisting value of the variable resister may vary according to the type of automobile and the manufacturer, the voltage supplied from the power supply line is 5V and the variable resister is 5k-β in this case. The variable resister may vary between 0.5k i3~5k-Q according to the variable locations of the variable resistance. Rl is lM- β and R2 is 1.5M-Q, and these are approximately 20~30 times the resistance value of the variable resister. And, their effect to the resistance value of the variable resister (13) is not considerable. However, by using the power voltage supplied through Dl, they compensate part of the voltage reduced by the voltage drop caused by the use of liigh- electric-consuming electric systems such as air-conditioners and lights and reduce the potential difference, occurred between the variable voltage line and earth, with R2 so that the voltage fluctuation on the variable voltage supply line (12) is suppressed and Dl interrupts the potential that may give an effect to the power supply line from the earth. The power voltage supplied through Dl is charged by C2 whose capacity is 470/zF. When the supply voltage drops below the specific level due to a disturbance, C2 discharges through Rl and R2 and compensates the potential difference between the power supply line and the variable resistance voltage supply line to mitigate the abrupt increase of potential of the variable voltage supply line (12). The potential difference between the earth and the said reference potential line (11) occurs within the range of 0.05-0.3N according to the use of such electric loads as automobile air-conditioners and lights although this may differ according to the type of automobile. A noise created from other electric parts of an automobile is transmitted through the said reference potential line (11) and variable resistance voltage supply line. According to such noise voltage, a higher voltage than the normal voltage of reference throttle valve opening ratio is supplied to the ECU so that the said ECU transmits unnecessary pulse signals to the solenoid control unit, and the said solenoid opens to supply unnecessary gas to the engine. Therefore, the ECU reference potential stabilizing circuit (300) eliminates the noise contained in the variable voltage supply line (12) and the reference potential line (11) by earth through the C3, C4, R4, D5, D6, D7 and D8 circuits. The noise created from the ECU is earthed and eliminated through the C3, C4, R4, D5, D6, D7 and D8 circuits that are connected to the reference potential line (11). When the potential difference abruptly increases or decreases due to disturbance by the noise between the reference potential line (11) and earth, controlling the engine power becomes difficult because the RAM (Random Access Memory) of the ECU changes the memory data, responds to the voltage and quickly deletes and creates the data so that the pulse that controls the solenoid is not created. Therefore, abrupt voltage fluctuation caused by the noise between the reference potential line (11) and earth is properly controlled by the D5-D8. Although the overall structure of the present invention is described above, the applications of the present invention are not limited to the above, but it may be applied in many different ways within the scope of the specifications, drawings and claims of the present invention. Industrial Applicability In supplying the variable voltage to the ECU according to variations of the variable resistance of the electronic accelerator of an automobile, the present invention described above minimizes the effect on the voltage value inputted in the ECU, enables the driver to control the output of an automobile's engine by interrupting various electric noises, increases the riding comfort, increases mileage by preventing unnecessary burning of gas and reduces air pollution and extends the life of an automobile.

Claims: CLAIMS 1. A variable voltage regulator for electronic accelerator in automobile comprising: an ECU power potential stabilizing circuit (200) connected between the power supply line (10) and the variable voltage supply line (12) to eliminate the noise transmitted to the power supply line (10) and to stabilize voltage fluctuations of the power supply line; and an ECU reference potential stabilizing circuit (300) installed between the variable voltage supply line (12) and the reference potential line (11) to eliminate the noise occurred between the reference potential line (11) and earth and between the variable voltage supply line (12) and the reference potential line (11) and to stabilize the potential fluctuation between the reference potential and a ground and the potential of the variable voltage supply line (12). 2. A variable voltage regulator for electronic accelerator in automobile in claim 1, wherein the said ECU power potential stabilizing circuit (200) comprises: a variable resister (13) and the cathode of Dl connected parallel to the power supply line (10); CI connected to both ends of the Dl; the anode of Dl connected to the variable voltage supply line (12) through the Rl; R2 whose one end is grounded and the other is connected to the cathode of the D2; and the anode of D2 grounded through the C2 which is connected to the anode of Dl. 3. A variable voltage regulator for electronic accelerator in automobile in claim 1, wherein, on the variable voltage supply line (12) and the reference potential line (11), the said ECU reference potential stabilizing circuit (300) comprises: C3 whose one end is connected to the anode of D4 (branch point "P"); the cathode of D4 which is connected to the anode of D3 through the R3; C4 which is connected to one end of C3 to the branch point "P" where the anode of D4 is also connected; one end of C4 is connected to the anode of D5 and the cathode of D6 through the R4; the cathode of D5 and the anode of D6 are connected to each other and they are connected to the anode of D7 and the cathode of D8 again; and the cathode of D7 and the anode of D8 are grounded.

Inventors: KONG YONG SHIK, KONG, YONG, SHIK
Applicants: KONG YONG SHIK, KONG, YONG, SHIK
Application year: 2001
Main classification: B60K26
IPC codes: B60K26, H02M1