With the capability to provide fuel at flows and pressures beyond the maximum requirements of the engine, receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of moisture. The fuel passes through the water separator which removes the water and large particulate contaminates that could damage or jam the gearator fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining, enters the fuel pump. The fuel, now under positive pressure flow, enters the filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented Fuel Preporator. The separated air/vapor is discharged from the filter through the Primary Air/Vapor Discharge Port and into the return to tank passage after the regulator. The fuel passing through the filter media free of contaminates & power robbing air/vapor and at pressures and flows to meet the needs of the engine exits the fuel filter through two passageways. The regulator controls the fuel pressure to the engine. Removes various contaminates, including entrained air/vapor, particulates and moisture, and removes excess fuel not needed by engines, allowing the fuel to flow through the regulator and return to the fuel tank.
The separated air/vapor enters the return port after the regulator, allowing pure fuel to flow to the engine at a regulated positive pressure. A gerotor pump offers quiet, long lasting performance.
Removes Air and Vapor from Diesel Fuel. Pure Diesel Fuel Reaching Engine. High Flow Rates of Fuel to Engine.
The solution is Fuel Preporator. Fuel Preporator significantly improves diesel engine performance and is approved for sale and use in California by CARB. Fuel Preporator's effectiveness has been proven over millions of truck miles and verified by EPA & CARB Certified Olsen Ecological Laboratory testing under ISO 8178 8 Mode Test criterion.
Discover how patented Fuel Preporator technology can deliver for you. United States 5,355,860 - 5,746,184 5,529314 - 6,729,310. Engineers Have Long Known About Entrained Air In Diesel Fuel. Like water, fuel contains a certain amount of dissolved air depending upon the fuel temperature, pressure on the fuel, specific gravity and the amount of aeration to which the fuel has been subjected. 2 Diesel Fuel contains about 10% air in solution, although the air is not visible.
Damage can be caused by anything in your fuel system that should not be there, including particles, heat, water and air bubbles. Air becomes entrained in diesel fuel through agitation from pumping and sloshing in the tank.
Additionally, the engine's transfer pump, operating under a vacuum, as with the conventional filter system, has a limited pressure flow available. This limited flow, which is insufficient to fully fill the pump mechanism at higher operating RPM's, results in pump cavitation and vapor. At higher altitudes, atmospheric pressure, the force that drives fuel from the tank, through the lines and filter, and into the transfer pump, decreases. This increases cavitation even more. Conventional fuel filter systems do nothing to relieve these conditions.
In fact, as the filter becomes more restrictive to the fuel flow as it plugs with use, these conditions become much worse! University of Illinois Department of Mechanical & Industrial Engineering, College of Engineering's study of diesel fuel concludes. Diesel fuel is vaporized in a conventional filtering system and is allowed to pass on to the injector system. Air is also allowed to pass on to the injector system.
Does not allow vaporized diesel fuel to be created, nor does the Fuel Preporator. Allow entrained air to be passed on to the engine. Eliminates the inconsistency that is found in a conventional fuel filtering system. Entrained Air and Vapor in Diesel Fuel Causes Retarded Injection Timing!
The delay of the injection results in retarded injection timing. Moreover, air in the fuel, no matter how small, remains a bubble.
Retarded Injection Timing Negatively Affects Diesel Engine Performance! Retarded injection timing caused by the presence of air/vapor in the fuel results in: low torque or power output, increased fuel consumption, increased exhaust emissions, rough idle/wet cylinder, and poor throttle response. Low Torque and Low Power Output: Low torque due to a delayed injection results from the fuel arriving in the combustion chamber too late for a full burn.
Specifically, a delay of the injection from an uncontrolled event, such as the presence of air/vapor in the fuel, allows the piston to move further into the power stroke before the injection takes place. The piston is now beyond the optimum position to fully utilize the pressure boost of the expanding gasses and for a complete burn of the fuel. The injection of fuel is intended, by preset parameters, to take place as the piston nears the top of the compression stroke. This allows the fuel to ignite as the crank journal approaches top dead center. Now, the timely injection followed by a full length power stroke, allows the fuel to burn completely and the expanding gasses to forcefully drive the piston downward.
These diesel engines are all equipped with the conventional'vacuum feed' filter system. Notice the point of torque rise, the peak torque range, and the similarity of rpm where torque begins to drop. This would imply the point at which atmospheric pressure fails to provide the Net Positive Suction Head necessary to support adequate fuel flow to the transfer pump, and cavitation becomes apparent. Note: It is standard within the industry to perform test cell tests with clean fuel filters to allow the engine optimum performance.
Torque rise off idle is seen to double, peak torque increases about 6% and does not fall off at the higher RPM's as it does with the conventional'vacuum feed system. The torque curve graph on the right was performed by the University of West Virginia, Morgantown, Engine Lab. The top curve was the Fuel Preporator/No Air. The next to top curve was the Fuel Preporator/0.5 slpm Air Injection into the fuel tank. The bottom two curves without the Fuel Preporator start dropping at the 15/1600 rpm range. The slight recovery at 1600/2200 rpm is not typical of an in-use engine. The torque curve of a Caterpillar 3306 diesel engine under controlled testing at the University of West Virginia shows the performance improvement obtained through the use of the Fuel Preporator. Retarded injection timing causes not only low power, but also an incomplete burn.
An engine equipped with the Fuel Preporator, having a timely injection and complete burn of the fuel, develops more power from the same volume of fuel than it would when equipped with the vacuum feed filter system. Consequently, the Fuel Preporator equipped engine is the more efficient engine!
The unburned hydrocarbons create deposits which reduce the volume of the combustion chamber, in turn, increasing the compression ratio. The retarded injection results in unburned hydrocarbons and deposits, The two out of three injections that are timely, result in higher temperatures and increased NOx gasses.
The ISO 8178 is an international standard designed for a number of non-road engine applications. It is used for emission certification and/or type approval in many countries worldwide, including the U. Depending on the legislation, the cycle can be defined by reference to the ISO 8178 standard, or else by specifying a test cycle equivalent to ISO 8178 in the national legislation as it is the case with the U. The ISO 8178 is actually a collection of many steady-state test cycles type C1, C2, D1, etc. Designed for different classes of engines and equipment.
Scenario B , air entrainment, reduced this power by 25% to 34.37 HP. System, the power was fully restored to 45.69 HP. Fuel economy testing provided similar results, shown in Fig. The average Brake Thermal Efficiency (BTE) was 28.8%.
Air entrainment reduced this to 23.9% BTE, a reduction of 17%. Device fully restored performance to baseline conditions, raising thermal efficiency to 29.2%. Air entrainment increased all components of gaseous emissions, including carbon monoxide (C), oxides of nitrogen (NOx), and unburned total hydrocarbons (THC).
Fuel cavitation testing, simulated by a fuel line restriction, provided similar results to that of air entrainment. There was a 23% loss in power accompanied by a 6% loss in fuel efficiency, as is illustrated in Figs. CO, NOx, and THC gaseous exhaust emissions were degraded by cavitation as seen in Fig. System restored these values to near baseline conditions.
Rough Idle and Wet Exhaust. Rough idle results from inconsistent injection timing due to the variation of air/vapor present in each injection.
The delayed injections also cause the idle speed of the engine to drop below the set idle rpm. Consequently, the ECM or governor must then increase the amount of fuel injected to bring the engine back to the set idle speed. This adds more fuel than the engine can completely burn. After considerable idle time, if the idle is not brought up to 800-1,000 rpm, the excessive fuel washes oil from the rings and liners, contaminates the oil in the crankcase and causes excessive engine wear. More importantly, the wet cylinder effect causes excessive unburned fuel in the exhaust of the idling diesel and has lead to anti-idling laws for truckers across the nation. Cummins Engine Company specifically points out in their trouble shooting manual for the following complaints: first, check for air in the fuel and then, fuel inlet restriction. 3666239, Section TT-Engine Performance Troubleshooting Tree. Engine Acceleration or Response Poor. Cranking Fuel Pressure is Low. Engine Operating Fuel Pressure is Low. Engine Difficult to Start or Will Not Start (Exhaust Smoke). Engine Difficult to Start or Will Not Start (No Exhaust Smoke). Engine Runs Rough at Idle. Engine Run Rough or Misfires. Engine Speed Surges at Low or High Idle. Engine Shuts Off or Dies Unexpectedly or Dies During Deceleration. Engine Starts But Will Not Keep Running. Engine Will Not Reach Rated Speed (RPM). All of the Above Symptoms Require. Step 4: Fuel System Checks.
Step 4A: Check for air in the fuel. Step 4B: Check fuel inlet restrictions. The item "Airdog Fuel Filteration Water Separation System Dodge Diesel Truck 89-93 100gph" is in sale since Saturday, January 2, 2010. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Air Intake & Fuel Delivery\Fuel Pumps".
The seller is "wholesale-tuners_fuel-injection" and is located in Missoula, Montana. This item can be shipped worldwide.
- Part Brand: pureflow/air dog
- Manufacturer Part Number: A4SPBD336
- Interchange Part Number: 1989 1990 1991 1992 1993 dodge ram cummins diesel
- Other Part Number: pickup truck
- Warranty: Yes