AU2003100906B4 - Lean bias logic processor (201VAS) - Google Patents
Lean bias logic processor (201VAS) Download PDFInfo
- Publication number
- AU2003100906B4 AU2003100906B4 AU2003100906A AU2003100906A AU2003100906B4 AU 2003100906 B4 AU2003100906 B4 AU 2003100906B4 AU 2003100906 A AU2003100906 A AU 2003100906A AU 2003100906 A AU2003100906 A AU 2003100906A AU 2003100906 B4 AU2003100906 B4 AU 2003100906B4
- Authority
- AU
- Australia
- Prior art keywords
- lpg
- fuel
- logic processor
- fcv
- lean
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- Output Control And Ontrol Of Special Type Engine (AREA)
Description
O
-1- 0 Z Lean Bias Logic Processor 00 Description: The Lean Bias Logic Processor is an electronic control system that controls fuel mixtures Nand subsequent exhaust emission levels of a vehicle (engine) operating on Liquefied 0 Petroleum Gas (LPG).
O
Operation: o Previous methods employed by after-market and OEM (Original Equipment N Manufacturers) suppliers have commenced with RICH BASE FUEL (LPG) MIXTURE and the removal fuel to maintain Lambda via various methods.
A reverse logic microprocessor using information received from the engines Lambda Sensor (02) and Throttle Position Sensor (TPS) drives a normally closed Fuel Control Valve (FCV). An engine must have a Lambda Sensor and a Throttle Position Sensor fitted to enable the Lean Bias Logic Processor to operate.
Sufficient LPG vapour over and above a LEAN BASE FUEL (LPG) MIXTURE is introduced into the LPG mixer (carburetor) from the LPG converter via the FCV, to maintain Lambda. The microprocessor pulses the FCV at a duty cycle of between 0 and 99 continuously according to the above-mentioned incoming information.
A FCV duty cycle of 0 indicates the base fuel mixtures are rich. Subsequently no additional LPG vapour would be introduced into the LPG mixer. Conversely a FCV duty cycle of 99 indicates the base fuel mixtures are lean. Subsequently, the maximum additional LPG vapour is introduced into the LPG mixer. Typically the FCV duty cycles would cycle between 30 and 60 constantly changing according to the engines fuel requirements determined by the engines Lambda (02) sensor.
A rapid increase of TPS voltage (acceleration) will cause the microprocessor to drive the FCV momentarily to a duty cycle of 60 65. This condition will richen the fuel mixtures on acceleration subsequently reducing Nox emissions and eliminating backfires caused by lean fuel mixtures.
The additional LPG vapour introduced into the LPG mixer is drawn from the secondary stage of the LPG converter. It is introduced into the LPG mixer via one of two methods.
1. Introduced into an air valve vacuum port beneath the mixer air valve diaphragm.
2. Introduced into the chamber above the mixer air valve diaphragm.
Method 1 simply allows additional metered LPG vapour to be drawn into the venturi of the LPG mixer (carburetor) as required to maintain Lambda.
Method 2 has a dual effect. The additional metered LPG vapour introduced above the air valve via the FCV will pass through the air valve transfer ports into the venturi of the LPG mixer as required to maintain Lambda.
0
O
-2- Z The additional metered LPG vapour introduced above the air valve via the FCV, will also 00 reduce air valve vacuum above the air valve diaphragm. This allows the metering spring that operates against air valve vacuum to push the air valve down. This will subsequently increase air valve vacuum below the air valve diaphragm. This condition will draw additional LPG vapour from the LPG converter into the LPG mixer through the
N
O normal LPG vapour supply hose.
0 Parts List: S1. Lean Bias Logic (LBL) microprocessor (Part GACP201VAS) Cl 2. Generic LBL wiring harness. (see circuit diagram) 3. Normally closed Fuel Control Valve (Part FCV-7, Part FCV VAS.) 4. 1/8 3/8 straight brass fuel barb fitting (Part B23) 1/8 3/8 90° brass fuel barb fitting (Part B27) 6. 1/8 3/16 90° brass fuel barb fitting (Part 7. 10mm ID rubber hose x 25mm length. (Part 8. 6mm vacuum hose x 400mm length. (Part HOVAC6)
Claims (3)
1. A control system for LPG fuel mixtures via the addition of LPG vapour over and above a lean base LPG fuel mixture to maintain lambda and subsequent N2 .exhaust emissions.
2. A control system as claimed in claim 1, that employs the operational principle as 2 herein before described in the operation statement and accompanying diagrams. 0
3. A control system as claimed in claims 1 2, that employs a reverse logic omicroprocessor, fuel control valve and ancillary hardware as herein before ci described in the operation statement and accompanying diagrams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003100906A AU2003100906B4 (en) | 2003-11-03 | 2003-11-03 | Lean bias logic processor (201VAS) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003100906A AU2003100906B4 (en) | 2003-11-03 | 2003-11-03 | Lean bias logic processor (201VAS) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2003100906A4 AU2003100906A4 (en) | 2004-01-22 |
| AU2003100906B4 true AU2003100906B4 (en) | 2005-01-20 |
Family
ID=34200615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2003100906A Ceased AU2003100906B4 (en) | 2003-11-03 | 2003-11-03 | Lean bias logic processor (201VAS) |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2003100906B4 (en) |
-
2003
- 2003-11-03 AU AU2003100906A patent/AU2003100906B4/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003100906A4 (en) | 2004-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK21 | Patent ceased section 101c(b)/section 143a(c)/reg. 9a.4 - examination under section 101b had not been carried out within the period prescribed | ||
| NB | Applications allowed - extensions of time section 223(2) |
Free format text: THE TIME IN WHICH TO GAIN CERTIFICATION HAS BEEN EXTENDED TO 07 DEC 2004. |
|
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |