Fuel/air mixture control device and method

• US 20100100305A1
• Filed: 10/17/2008
• Published: 04/22/2010
• Est. Priority Date: 10/17/2008
• Status: Active Grant

• Current Assignee: Alfred Manuel Bartick
• Original Assignee: Alfred Manuel Bartick
• Inventors: Bartick, Alfred Manuel
• Granted Patent: US 7,899,606 B2
• Time in Patent Office: Days
• US Class Current: 701/109
• CPC Class Codes: F02D 2400/11 After-sales modification devices designed to be used to modify an engine afterwards
• CPC Class Codes: F02D 41/1475 Regulating the air fuel ratio at a value other than stoichiometry

Abstract

In an automobile fuel control system having an EGO sensor which sends voltage to an ECM in order to adjust fuel/air ratio, the EGO sensor being disabled and replaced with a substitute signal generator circuit which stimulates the ECM toward lean-running.

Claims

1. A waveform generator circuit used in combination with an automotive engine of Lambda concept which utilizes a fuel-air mixture control system having an electronic control module which receives a periodic and cyclic voltage signal to it'"'"'s oxygen-sensor input port from said waveform generator with said waveform generator'"'"'s output voltage signal closely mimicking the varying electrical output signal which issues from at least one standard Lambda exhaust gas oxygen sensor signal output port when said oxygen sensor detects via the engine'"'"'s exhaust gas oxygen content that the automotive engine is operating mainly in a Rich Fuel-Air mixture operating mode comprising;

a classical type 555 integrated circuit timer functioning as an astable-multivibrator-square wave signal source;

a voltage generating circuit functioning as a periodic and cyclic electrical signal source replacing one or more electrically-disconnected standard Lambda concept exhaust gas oxygen sensor as a voltage signal source;

a voltage generating circuit defining both a cyclic high and a low voltage output signal level and it'"'"'s duty-cycle and operating-frequency when said voltage generator is integrated into an internal combustion engine system with said engine system possessing an altered open loop Lambda concept negative feedback fuel-air mixture control system with said voltage generating output signal stimulating the engine'"'"'s fuel-air mixture control system in a manor which reduces both the normal fuel-injector fuel flow and the normal engine fuel consumption while driving;

a voltage generating circuit integrated into an internal combustion engine system possessing a standard Lambda concept closed-loop feedback fuel-air mixture control system with the presence of said voltage generating circuit altering said Lambda concept fuel-air control system so as to function in an open-loop feed back operating mode.

2. The voltage generating circuit of claim 1 wherein said automotive fuel-air mixture control system known as the pseudo exhaust gas oxygen sensor which is of the type which sends a periodic and cyclic wave form voltage output signal to one or more oxygen-sensor input ports of an electronic control module.

3. The voltage generating circuit of claim 1 in which the pseudo exhaust gas oxygen sensor circuit functions during all periods of engine operation of the automotive fuel flow control system to provide a periodic and cyclic wave form output voltage signal of both high and low voltage levels which is structured electrically so as to stimulate the automotive fuel-air mixture control system to reduce normal engine fuel consumption while driving.

4. The voltage generating circuit of claim 1 for use with a Lambda concept automotive fuel-air mixture control system having one or more electrical harnesses and mated connector pairs to channel the voltage generator output signals of claim 1 between the pseudo exhaust gas oxygen circuit signal output ports and the electronic control module'"'"'s oxygen sensor input ports.

5. The voltage generating circuit of claim 1 for use with an automotive fuel-air mixture control system having electro-mechanically connected harnesses (wire-for-wire spliced) between the pseudo exhaust gas oxygen sensor circuit output ports and the electronic control module'"'"'s oxygen sensor input ports as an alternate connection-means to that of claim 4.

6. The voltage generating circuit of claim 1 wherein said periodic and cyclic waveform output voltage signal which is also known herein as the mimicked engine Running-Rich signal having a high-level state in the range from about +0.75 to +0.95 volts followed by an engine Running-Lean signal having a low level state in the range of +0.0 to +0.35 volts,

7. The voltage generating circuit of claim 1 wherein said periodic and cyclic engine Running-Rich waveform output voltage signal stimulates the engine'"'"'s fuel-air mixture control system for fuel injector type engines to operate mainly in an air-fuel mixture ratio range from about 14.7:

1 to 18.5;

1.

8. The voltage generating circuit of claim 3 having a periodic and cyclic square wave output signal voltage with operational specifications comprising;

in which;

Periodic Frequency;

Fo=1/T=1 to 3 Hz

Period of one cycle;

T=0.33 to 1.0 seconds

Period when voltage is “

high”

;

t1=D×

T seconds

Period when voltage is “

low”

;

t2=T−

t1 seconds

Duty Cycle;

D=t1/T=0.70 to 0.95

E min=+0.00 to +0.35 volts

E max=+0.75 to +0.95 volts.

9. The voltage generating circuit of claim 3 having a circuit comprising;

Resistor R1 &

R2=See Note * below

Resistor R3=5.1 K to 7.5 K ohms

Resistor R4=10 k to 20 K ohm pot

Resistor R5=10 k to 20 K ohms

Resistor R6=50 k to 150 K

Resistor R7=50 k to 150 K

Port A=signal outputs

Port B=signal returns

Capacitor C2=0.01 to 0.001 μ

farads

Capacitor C3=50 to 100 μ

farads

Diode CR1=1N4148/1N914

Diode CR2=1N4148/1N914

Battery B1=555 cmos

Capacitor * C1=10 to 100 μ

farads

* Multiple Interactive values for R1, R2 and C1 establish the operating frequency and duty cycle which are mathematically derived based upon the periodic wave form and parameters of claim 8 and the key formulas comprising;

R1=(t1/0.693×

C1)−

R2

R2=t2/0.693×

C1 and D=t1/T

Fo=1/T and D=(R1+R2)/(R1+2×

R2).

10. A fuel-air mixture control system comprising;

an exhaust gas oxygen sensor of the Lambda concept which establishes an output voltage responsive to exhaust gas oxygen levels as a model and basis there from for the establishment of an electrical output signal and it'"'"'s waveform structure and parameters which issues from a pseudo exhaust gas oxygen sensor circuit when said model'"'"'s exhaust gas oxygen-content is mainly lower related to a preselected standard;

an electronic control module which receives signal voltage at it'"'"'s oxygen sensor input port and derives there from a command to associate one or more fuel injectors to adjust fuel flow to establish a reselected air-fuel ratio;

at least one fuel injector unit responsive to signals from the electronic control module to lean-out fuel flow when the pseudo exhaust gas oxygen sensor circuit'"'"'s output voltage delivered to the electronic control module'"'"'s oxygen-sensor input port is higher and to enrich fuel flow when the pseudo exhaust gas oxygen sensor circuit'"'"'s output voltage is lower in electrical level as related to a preselected standard;

an automotive engine fuel-air mixture control system which defeats the electrical function of at least one or more exhaust gas oxygen sensors by nullifying the closed loop operation of the fuel-air mixture control system and said oxygen sensor'"'"'s preheater circuit by the demating of it'"'"'s electrical harness interface connectors thus facilitating a Lambda concept fuel-air mixture control system to operate in an open-loop negative feed-back mode stimulated by the periodic and cyclic electrical output signal issuing from a pseudo exhaust gas oxygen sensor circuit;

an automotive engine fuel-air mixture control system which outputs a periodic and cyclic Run-Rich electrical signal wave form from a pseudo exhaust gas oxygen circuit having an operating frequency of between 1 and 3 Hz and a duty cycle between 70 and 95% for Lean-Running of it'"'"'s fuel-air mixture control system;

an automotive engine fuel-air mixture control system which outputs a periodic and cyclic Run-Rich electrical signal from a pseudo exhaust gas oxygen sensor circuit which stimulates an electronic control module which allows engine air-fuel mixture performance to be within the operating limits of the vehicle manufacture'"'"'s standard operation window for the oxygen-sensor input port of the electronic control module.