The jet pump is made in the form of an injector, the flow channel of which is connected to the drain pipeline coming from the engine, and the injection channel is connected to the fuel intake pipeline of the left tank.
Only in the Hunter is the jet pump built into the fuel module cover.
Fuel tanks equipped with sediment drain plugs are located on the left and right between the frame longitudinal beams and side body panels.
On vehicles equipped with an injection engine, a fuel supply system without a fuel tank switching valve is used. The absence of a tap eliminates the possibility of disruption of the fuel supply due to its untimely switching.
Fuel is supplied to the fuel pump from the left tank through the intake pipe mounted on the fuel level sensor. As fuel is consumed, the right tank is automatically replenished from the left one due to the resulting rarefaction, since the right tank does not communicate with the atmosphere, and the left fuel tank communicates with the atmosphere through a separator with a valve. Thus, if there is fuel in the right tank, the flow initially comes mainly from the right tank.
Excess fuel drawn back by the fuel pump enters the right tank through the fuel drain line.
Filler caps of fuel tanks are deaf, provide a hermetic seal, exclude possible leakage and evaporation of fuel.
It was not there, the plugs do not provide an airtight seal and gasoline runs out of the right tank neck.
The lids themselves are made with ratchets, which makes it impossible to tightly close the tank necks.
How to deal with it? - The manufacturer, that is, Ulyanovsk, completely refused to give an answer to the technical question posed, bouncing off to the official dealer. (eccentrics with the letter M).
We take the Lovato solenoid valve from the gas equipment of cars (it just serves as a gas cutter).
You can use it manually by screwing the bolt to the end, we open the valve, unscrew it and close it.
We install on the fuel intake pipe from the left tank.
It turned out not so hot, but it works fine, you need to buy adapters at an angle of 90 degrees, otherwise such loops turned out, it’s impossible in short, because the hose is bent.
And so, the problem is solved and tested.
Can you get a patent?
The continuation did not keep you waiting, the hoses are a temporary phenomenon, anyway, a kink is formed.
In the morning, 3 degrees of frost, the sun is shining, fluffy snow falls on the head from the roof of the car, blown off by a light breath, my design idea works))).
To implement this idea, it took a little less than half a meter of 8 mm copper tube, a 5/16 flaring kit with a pipe cutter and a pipe bender for 6-8-10 mm copper tubes.
UAZ Hunter replaced the UAZ-469 in 2003. Recently, this car has been modified several times. This "hunter" is in great demand among residents of remote regions of the Russian Federation. This car is also used for military purposes.
External features
Solid domestic SUV
Vehicle length - 4100 mm, width (without mirrors) - 1730 mm, height does not exceed 2025 mm. The original body design, good interior, high technical capabilities make the UAZ Hunter a universal vehicle.
As for the wheelbase, the Hunter is equipped with front and rear wheels with the same width - 1465 mm. The weight of this vehicle is 2550 kg. Fuel tank capacity - 70 l. In the cabin of the UAZ Hunter there are 5 seats.
If we consider the comfort of this vehicle, it should be noted that the doorways are narrow, so getting into the car is not very convenient. Chairs can be adjusted. As for the interior, it has a classic character. The finish is easy to wet clean. Noise isolation of the car is low, which is especially felt when driving at high speed. The SUV in question is equipped with a powerful stove that quickly warms up the interior in winter.
Often, the owners of this vehicle independently install 2 quiet stoves for the back row. This is due to the fact that the standard heating unit is equipped with a noisy fan.
Technical capabilities
UAZ Hunter is in great demand due to its high technical characteristics. This car can be equipped with:
- gasoline engine;
- diesel power unit.
Base 16-valve Hunter engine
The basic package includes a gasoline engine ZMZ-409.10. It has 4 cylinders with a volume of 2.7 liters. The power unit is located in the front of the body, equipped with a 16-valve timing and distribution fuel injection system. The manufacturer in question recommends refueling with gasoline of a brand not lower than AI-92. The maximum engine power is 128 hp. With. Peak torque is considered to be 209.7 Nm. This limit can be reached at 2500 rpm.
If you use Hunter in mixed mode, gasoline consumption will be more than 13.2 liters per 100 km. It should be taken into account that the dynamic characteristics of the car are weak. The maximum speed of this SUV is no more than 130 km / h. For starting acceleration from 0 to 100 km / h, it will take more than 35 seconds.
If we consider the diesel version of the UAZ, then it is equipped with a ZMZ-5143.20 engine. Such a power unit has 4 cylinders and a volume of 2.2 liters. The package also includes a 16-valve timing and fuel injection system. The maximum power of such an engine is 113.5 liters. With. Peak torque can be reached at 270 Nm.
If we compare gasoline and diesel engines in terms of fuel economy, then the 2nd engine option is considered more attractive. In the combined cycle, fuel consumption is 10.6 liters per 100 km. As for the dynamics, the diesel unit is significantly inferior to the gasoline counterpart.
These models are equipped with a 5-speed manual transmission Hyundai Dymos. It is several times superior to the domestic version, which was previously installed on UAZ. It should be noted that the foreign box also has negative characteristics. Often it makes noise and creaks when switching.
Reliability of power units
A gasoline engine is more reliable than a diesel one. At the same time, both motors easily endure winters, providing the right amount of traction when driving. Hunters are equipped with durable chassis. Ahead are the following items.
- Spring suspension.
- 2 trailing arms.
- Thrust.
- Stabilizer.
The stern of the SUV is supported by 2 longitudinal springs. Hydropneumatic shock absorbers with double-sided action are provided in front and behind. The front wheels have ventilated disc brakes and piston calipers. The rear wheels are equipped with drum brakes. The SUV is equipped with a power steering.
It should be noted that this vehicle has an all-wheel drive system, represented by a two-stage box with axles. The constant mode is characterized by the supply of traction to the rear axle. If necessary, UAZ owners can hard block the front axle.
In terms of cross-country ability, the Hunter is considered a universal vehicle. If the car is needed to overcome off-road, auto mechanics are advised to give preference to the diesel version. The SUV in question feels great on country roads. But if the car is still stuck in the mud or snow, you will need the help of a tractor.
It should be noted that you can’t ride off-road on factory tires for a long time. Therefore, it is recommended to purchase a set of special all-terrain tires. Motorists note that when driving at a speed of more than 100 km / h, loud noise and creaking are heard in the cabin. Hunter is easy to manage, however, you will need to turn the steering wheel more actively in tight turns. When braking, take into account the short braking distance when decelerating from 100 km/h to 0, especially if the vehicle was moving faster than 60 km/h.
Filling the tanks with fuel is carried out separately in order to fill the tanks completely: first, the main tank is filled (during refueling, fuel is also partially poured into the additional tank), then the additional tank is filled. Fuel is consumed from both tanks in approximately the same way, the tanks work as communicating vessels.
Installation requirements:
- Main tank cover ( without valve, access atm. there is no air in the tank through it)
- Additional tank cover ( with valve, access atm. air into the tanks is carried through it)
- Fuel receiver of the main tank (shut off the connection of the tank with the atmosphere, "Air" tube).
Addition: on Scania vehicles (according to theory), an additional tank is consumed first due to discharge, and then the main fuel tank.
System advantages:
Easy to install this wiring diagram. It is not required to purchase a fuel intake for an additional tank. There are no additional connections to the fuel system of the car - accordingly, there is no possibility of its airing. Simplicity and reliability of the system.
System disadvantages:
At very low temperatures, there is a possibility of fuel freezing in the banjo bolts and overflow hose, which will make it impossible for fuel to flow from tank to tank and to balance the pressure in the main tank with atmospheric pressure. If the main tank closes as tightly as possible, and the pressure in it cannot equalize with atmospheric pressure, the tank will be squeezed externally. The tank will shrink inward. With a large number of compression and expansion cycles, the main tank may crack. To avoid this, when the hose freezes, simply open the air to the tank: open the tank’s connection with the atmosphere through the fuel receiver (“Air” tube) or by installing the cover from the additional tank ( with valve, access atm. air into the tanks is carried through it).
On UAZ Hunter vehicles with a ZMZ-409 Euro-2 engine, a fuel supply system without a fuel tank switching valve was used. Fuel is supplied by a submersible electric fuel pump (submersible module) installed in the right fuel tank.
Fuel supply system for the ZMZ-409 engine on the UAZ-315195 Hunter.
From the fuel tanks, through the fine filter, the fuel enters the fuel rail, the relative pressure in which is maintained by the pressure regulator at 300 kPa. Increased fuel pressure eliminates the appearance of air bubbles and gasoline vapors in the fuel line, which interfere with the normal operation of the injectors.
The fuel injectors are high speed precision valves (normally closed) that open to inject fuel into the engine intake pipe. The opening and closing of the injectors is carried out automatically according to the cyclogram of the operation of the corresponding output channels of the electronic control unit.
The injectors inject fuel into the engine's hot and closed intake valves, which improves the quality of the air-fuel mixture. The control unit sets the duration and phase of fuel injection depending on the engine operating mode, crankshaft speed and load.
Excess fuel in the rail is discharged through the drain hole of the pressure regulator and the jet pump into the right tank. At the same time, fuel flows by injection from the left tank through the jet pump into the right tank.
After any maintenance or repair of the fuel supply system of the ZMZ-409 engine, associated with tightening connections, removing or replacing parts and assemblies, it is necessary to check the tightness of the system.
Lack of tightness in the joints is eliminated by tightening the joints or replacing defective elements. The fittings of steel fuel pipelines must be tightened to a torque of 27+-7 Nm. The rubber hose clamps are tightened with a torque of 3.5+-0.5 Nm.
Signs of a malfunction in the fuel supply system of the ZMZ-409 engine.
Clogging of the mesh filter of the submersible module in the right fuel tank, the fuel fine filter, the presence of dirt and mechanical impurities in the fuel tanks are manifested in the deterioration of the vehicle dynamics, unstable engine operation, especially at high loads.
With these signs, in order to avoid failure of the submersible module and the fuel module, you should immediately flush the right fuel tank and the submersible module strainer, and also replace the fine fuel filter.
At ambient temperatures below 0 degrees, signs of clogging may be due to the presence of water and its freezing in the power system. If water is found in the fuel, drain it and flush the fuel tanks with fuel lines with clean gasoline, and replace the fuel fine filter. If, after carrying out these measures, the nature of the engine operation has not changed and unstable engine operation is observed, then the following work must be carried out -.
Fuel tanks UAZ Hunter.
The UAZ Hunter fuel supply system includes two fuel tanks of the same volume. The capacity of each is 35 liters. Maintenance of fuel tanks consists in periodic flushing or replacement of the submersible module filter in the right tank, flushing of the filter of the receiving tube of the fuel gauge in the left tank and the tanks themselves. Periodically check the reliability of the fastening of the tanks and, if necessary, tighten the bolts of their fastening. To flush the fuel tanks, remove from the vehicle.
The filter of the submersible module or the receiving tube of the fuel gauge can be flushed without removing the tank from the vehicle, while removing the submersible module or gauge through the hatch in the floor of the body.
Fuel tank caps must be kept clean and tightly closed. The catalog number of the hermetic plug of the UAZ Hunter fuel tanks is 31602-1103010. Plugs 2108-1103010-11 are also suitable for fuel tanks, provided that they are made completely tight.
In order to reduce the emission of fuel vapors into the atmosphere, a fuel vapor system is installed on UAZ Hunter vehicles. The left fuel tank communicates with the atmosphere through a separator, valve and adsorber.
During the operation of the car, you need to pay attention to:
- the presence of a pungent smell of gasoline in the cabin, engine compartment in the places where fuel and steam hoses and pipes pass. If present, replace the adsorber;
- correct installation of the adsorber purge solenoid valve;
- cracks and damage to the adsorber - if any, replace the adsorber;
- pinching and damage to fuel and steam hoses, damaged and leaky pipes and hoses must be replaced.
Fuel rail.
Designed to connect the fuel line to the engine intake tract and to install injectors. The fuel rail is a through pipe with four holes for connecting and fixing the injector inlet fittings.
A fuel supply line is connected on one side of the pipe, and a drain fuel line with a fuel pressure regulator on the other. The outlet fittings of the fuel BOSCH 0 280 150 560 or SIEMENS 6354 ZMZ DEKA1D are pressed by the fuel rail to the holes in the cylinder head through the sealing rings.
Fuel fine filter.
The fuel supply system is equipped with a fuel filter. It is made in the form of a disposable non-separable filter cartridge. Replace the fuel filter every 20,000 kilometers or in the event of the above faults.
Fuel pressure regulator BOSCH DR-L 0280160258 or equivalent.
Designed to maintain a constant fuel pressure in the fuel rail and the throttle space of the intake pipe. The fuel pressure regulator consists of the following elements: a housing with a pressure chamber, inlet and outlet fuel fittings, a fuel return control valve mounted on the diaphragm, and a vacuum chamber with an air fitting.
The fuel pressure regulator is attached through the inlet threaded fitting to the drain hole of the fuel rail, and its outlet fitting is connected through the drain pipe to the jet pump. The air fitting of the fuel pressure regulator is connected by a thin rubber hose to a fitting screwed into the intake pipe receiver.
Increased fuel pressure, more than 300 kPa, in the engine fuel rail is manifested by increased fuel consumption, smoky engine exhaust. With these signs, you should clean the jet pump, blow out the drain fuel lines from the pressure regulator on the fuel rail to the right tank. If necessary, replace the pressure regulator and the electric fuel pump.
The fuel supply system for the ZMZ-409 engine on the UAZ Hunter is equipped with a jet pump. It is designed for forced transfer of fuel from the left fuel tank to the right one. The jet pump is an injector, the flow channel of which is connected to the pipeline for draining fuel into the tank, and the injection channel is connected to the fuel intake pipeline. Attached to the fuel hoses at the right side member of the frame.
Periodically check the tightness of the pump and its connections. If there is no transfer of fuel from the left fuel tank to the right one, remove the jet pump and unscrew its nozzle, flush it with clean gasoline and blow it with air.
