 printable version
Design Features
The structure of the power supply system includes elements of the following systems: - Fuel supply system comprising a fuel tank, the module electric fuel pump, fuel filter, pipes, hoses, fuel rail with injectors; - Air supply system, which includes an air filter, air supply hose, the throttle device; - The fuel vapor recovery system, consisting of a canister, the canister purge valve and pipework. Functionality of the fuel system - providing a supply of the required quantity of fuel into each cylinder of the engine in all operating modes. In this system, the functions of mixing and dispensing feed fuel mixture to the engine cylinders are divided: the nozzle is carried metered fuel injection into the intake pipe (receiver), as required at each moment of operation of the engine the quantity of air supplied by a system consisting of the throttle device and the idle speed regulator. This control method makes it possible to provide an optimal composition of the combustible mixture in the engine to provide maximum power at the lowest possible fuel consumption and low emissions. Controls the fuel injection and ignition system electronic engine control unit continuously monitored using appropriate sensors engine load, vehicle speed, the thermal state of the motor, optimal combustion process in the engine cylinders. A feature of the injection vehicle KIA Spectra are synchronous actuation injectors in accordance with the valve timing (engine control unit receives information from the phase sensor). The controller includes a nozzle sequentially rather than in pairs, as in the systems of the asynchronous injection. Each nozzle is turned through 720 ?� rotation of the crankshaft. However, the start-up mode and dynamic conditions of the engine uses an asynchronous method of supplying fuel without synchronization with the rotation of the crankshaft.  The main sensor for the fuel injection system is a gauge of concentration of oxygen in the exhaust gas (lambda probe). It is mounted in the intermediate pipe of the exhaust system and the engine together with the engine control unit and the control circuit forms a nozzle-fuel mixture supplied to the engine. The sensor signals the engine control unit determines the amount of unburned oxygen in the exhaust gases and thus is optimally air-fuel mixture fed into the engine cylinders at each moment. A deviation from the optimum composition of 1:14 (oil: air), which provides the most efficient operation of catalytic converter, the control unit via the injectors changes the composition of the mixture. A fuel tank mounted under the body floor in the rear portion and is fixed to the floor panel by two brackets. The filler pipe is connected to the tank for petrol-resistant hose, nozzles attached to the collars. In the filler pipe is an air intake valve. In order not to fuel vapors into the atmosphere, the tank is piped to the adsorber. To prevent heat from the exhaust system of the engine installed on the tank termoekran. The hole in the top of the fuel tank installed module 1. side of the fuel tank is attached two-way valve 2 of the fuel vapor recovery system.
NOTE It looks like the fuel tank bracket to the floor panel. |
Combined fuel supply system in the form of interconnected steel pipes and rubber hoses.
WARNINGS It does not replace steel piping hoses, tubes of copper or aluminum, since only steel pipes satisfy operation at elevated pressure and vibration. Hoses of power produced by a special technology of oil and gasoline resistant materials. The use of hoses which differ in design from those recommended may lead to a denial of food, and in some cases fire. |
Fuel Module submersible, electric, rotary type. The pump provides a supply of fuel and mounted in the fuel tank, which reduces the possibility of vapor lock, since the fuel is supplied under pressure and not under the influence of vacuum. It supplies the fuel from the tank through the fuel line to the fuel rail at a pressure of about 300 kPa (about 265 psi at idle). Fuel module includes ... ... electric fuel pump 1, the filter 2 fuel consumer ... ... fuel pressure regulator maintains a constant fuel pressure in the central channel of the fuel rail in all modes of operation of the engine and does not exceed the fuel rail pressure above 300 kPa ... ... and Sensor fuel level indicator. Fuel fine filter - full flow. Molded filter has a steel body with a paper filter element. Fuel rail is a hollow molded piece with holes for the injectors and inlet fitting for the connection of the high-pressure fuel line. The nozzles are sealed in the sockets with rubber rings and secured with spring clamps. Nozzle assembly with rail inserted into the holes of the receiver and secured with two screws.  Spray nozzles are included in its opening of the intake tube (receiver). In these nozzles are sealed with rubber rings. The nozzle is designed for dosed injection of fuel into the engine cylinder, and is a precision electromechanical valve (fig. 5.12). Fuel under pressure enters through the filter from the rail 7 through channels within the nozzle body to the gate valve. A spring 4 biases the needle 12 to the tapered bore 2 of the plate nebulizer, keeping the valve in the closed position. Voltage supplied from the engine control unit 6 through the pin terminal 5 to the coil of the electromagnet, it creates a magnetic field retractor core 9 with the needle 12 inside the electromagnet. Conical annular opening in the plate 2 is opened and the fuel is injected from the spray diffuser body 3 into the intake port of the cylinder head and further into the engine cylinder. After receipt of the termination of an electrical impulse spring 4 returns the core 9 and the needle 12 to its original state - the valve locks. The amount of fuel injected by the nozzle depends on the duration of the electric pulse.
| Fig. 5.12. Injector fuel injection system 1 - O-ring; 2 - plate atomizer; 3 - nozzle body; 4 - spring; 5 - electromagnet coil; 6 - pin terminal of the winding of the electromagnet; 7 - the fuel filter; 8 - the case of an electromagnet; 9 - a core; 10 - remote bush; 11 - valve seat; 12 - the needle shut-off valve
|
The air filter is installed in the front left of the engine compartment on the three pillars. Air filter element - paper, flat with a large filter surface area. The filter is connected to air supply corrugated rubber sleeve with throttle assembly. The inlet filter is inserted a rubber sleeve corrugated air supply duct which is fixed on the upper crosspiece of the radiator frame. Silencer inlet connected to the air supply duct through a sleeve. Throttle node representing a control device, serves for varying the amount of primary air supplied to the intake system of the engine. It is installed at the inlet flange of the receiver in front of it. On the pipe of throttle knot wearing molded rubber tube attached worm and clamp connecting the throttle device with an air filter. The air filter unit is not seasonal adjustment, so the throttle device is equipped with a heating system which prevents the icing throttle during the cold season, and connected to the engine cooling system hoses. Moreover, in the channel of the throttle device an opening for feeding secondary air to the idling regulator. In the operation of the throttle device requires no maintenance and adjustment. The regulator maintains the desired idle speed of the engine idle when the throttle is fully closed during its start-up, warming and load changes when the auxiliary equipment. The controller adjusts the amount of secondary air supplied to the intake system in addition to the throttle valve, and an electromechanical valve is attached with two screws to the flange of the throttle body assembly. The engine control unit, the processed signals from the sensors, determines the need for opening the valve controller and transmits pulses to the electrical output of the stator winding of the regulator. In the inlet pipe through the channels in the throttle node receives additional air. Defining the vacuum in the intake pipe of the engine control unit aims to maintain it at a given level, periodically opening and closing the valve regulator of idling. This makes it possible to provide a constant flow quantity of supplementary air to maintain a constant idle speed. By varying the valve opening and closing control, the control unit compensates for a significant increase or decrease the amount of air caused by suction through its unsealed inlet system or alternatively, the air filter clogging. Inclusion of additional units causes an increase in the load of the engine, accompanied by a decrease in idle speed and change the vacuum in the intake pipe, which is also compensated by the control unit using the controller.
The system prevents the fuel vapor recovery system out of food in an atmosphere of fuel vapors, adversely affecting the ecology of the environment. The system EVAP adsorber installed charcoal to filter the fuel vapor. It is installed in the engine compartment and is connected by pipelines to the fuel tank and the canister purge solenoid valve. The engine compartment is located canister purge solenoid valve, which pulses the engine control unit switches the operation modes of the system. Fuel vapors from the fuel tank through conduit continuously discharged and accumulated in the adsorber filled with activated charcoal (adsorbent). When the engine is going regeneration (restoration) of the adsorbent canister purge of fresh air coming into the system under the action of vacuum transferred through conduit of the throttle device in the diffuser cavity adsorber when opening the solenoid valve. The magnitude of valve opening, and hence the intensity of the canister purge depend on the angle of rotation of the throttle and defined vacuum that occurs within the cavity inlet pipe running engine and transmitted via the control line. Fuel vapor from the adsorber via line enters the intake pipe of the engine and are burned in the cylinders. Malfunction of the fuel vapor recovery system entail instability idling, stop the engine, increased exhaust emissions and the deterioration of the driving characteristics. The two-way valve is mounted on the fuel tank and serves to restrict the overflow of fuel tank vapors.
| 
