Service Nissan Sunny with 1991 on 1997 of release in a body n-14.
1. The maintenance instruction
2. Maintenance service
3. Engines
4. Cooling system
5. Heating and ventilation system
6. Fuel and an exhaust system
6.1. Carburettor engines
6.2. Engines with system of injection of fuel
6.3. System of a food / of release of the fulfilled gases
6.4. System of decrease in toxicity of the fulfilled gases
6.4.1. Models with 1,4 and 1,6 litre engines
6.4.2. Models with 1,6 and 2,0 litre engines
6.4.2.1. System of decrease in emission картерных gases
6.4.2.2. The Katalitichesky converter
6.4.2.3. The monitoring system over allocation of steams of fuel from fuel system
6.4.2.4. System рециркуляции exhaust gases
6.4.2.5. System of thermal neutralisation
6.4.2.6. System of an admission of air in a final collector
6.4.2.7. System of decrease in toxicity of exhausts
7. System of start-up of the engine
8. Coupling
9. Transmissions
10. Semiaxes
11. Brakes
12. Suspension brackets and a steering
13. A body
14. An electric equipment
 




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6.4.2. Models with 1,6 and 2,0 litre engines

All models Nissan Sunny described in this management, can use the gasoline which is not containing тетраэтилсвинца, and also, have the systems promoting minimisation of harmful emissions in atmosphere.

On all models the system of decrease in emission картерных gases, and also following systems, depending on model is established:

Models with the carburettor engine in volume of 1,6 litres without каталитического the converter – system of decrease in toxicity of exhausts at engine work in a mode of idling and демпфер throttle заслонки.

Models with the carburettor engine in volume of 1,6 litres with каталитическим the converter – каталитический the converter, system рециркуляции exhaust gases, the monitoring system behind allocation of steams of fuel from fuel system, system of an admission of air, system of decrease in toxicity of exhausts at engine work in a mode of idling and демпфер throttle заслонки.

Models with the engine in volume of 1,6 litres and multidot system of injection of fuel – каталитический the converter, system рециркуляции exhaust gases and the monitoring system over allocation of steams of fuel from fuel system.

Models with the engine in volume of 2,0 litres and one-dot system of injection of fuel without каталитического the converter – system of thermal neutralisation of exhaust gases and демпфер throttle заслонки.

Models with the engine in volume of 2,0 litres and one-dot system of injection of fuel with каталитическим the converter – каталитический the converter, system рециркуляции exhaust gases, the monitoring system over allocation of steams of fuel from fuel system, system of thermal neutralisation of exhaust gases and демпфер throttle заслонки.

Models with the engine in volume of 2,0 litres and multidot system of injection of fuel without каталитического the converter – any additional systems of decrease in toxicity of exhausts it is not established.

Models "Phase I" (release till June, 1993) with the engine in volume of 2,0 litres and multidot system of injection of fuel with каталитическим the converter – каталитический the converter and the monitoring system over allocation of steams of fuel from fuel system.

Models "Phase II" (release after June, 1993) with the engine in volume of 2,0 litres and multidot system of injection of fuel with каталитическим the converter – каталитический the converter, the monitoring system over allocation of steams of fuel from fuel system and system рециркуляции exhaust gases.

System of decrease in emission картерных gases

For decrease in emission of not burnt down hydrocarbons from картера the engine in atmosphere the engine hermetically is closed, and breaking in картер the engine gases and engine oil steams get from картера through the valve into the inlet channel, whence they, then, will arrive in the engine and will be burnt in following cycles of work of the engine.

In case in an inlet collector there will be very low depression, gases will be simply tightened in it from картера the engine. When depression in an inlet collector not so big, gases will leave from картера the engine under the influence of higher (concerning) pressure in картере; when the engine is worn out, the increased pressure in картере (because of increase in break of gases) will force a part of gases to arrive in an inlet collector at any pressure in a collector.

The Katalitichesky converter

For reduction of quantity of the harmful substances getting to atmosphere, on some models in system of emission of exhaust gases it is established каталитический the converter. On all models on which it is established каталитический the converter, the control system with a feedback is used. In this system the gauge of exhaust gases constantly informs the electronic block of management of the engine on the oxygen maintenance in exhaust gases. It allows the electronic block of management to regulate structure of a fuel mix so that каталитический the converter worked with peak efficiency.

The gauge is sensitive to the oxygen maintenance in exhaust gases and sends on the electronic block of management signals with various pressure depending on its concentration. If taken away air / the fuel mix is too rich, the gauge sends a signal with a high voltage. Pressure decreases at increase in the maintenance of oxygen in a fuel mix. The maximum factor of neutralisation of the fulfilled gases каталитическим is reached by the converter, when chemically correct structure of a fuel mix / of taken away air for full combustion of gasoline – 14,7 parts (on weight) air on 1 part of fuel (стехиометрическое a parity) is supported. At such parity, pressure of signals of the gauge sharply changes also the electronic block of management accordingly regulates structure of a fuel mix / of taken away air, changing duration of an impulse of an injector (ов) (time during which the injector is opened). On later models in the gauge there is a built in heating element (supervised by the electronic block of management) which serves quickly to warm up a sensitive tip of the gauge to normal working temperature.

The monitoring system over allocation of steams of fuel from fuel system

For minimisation of emissions of not burnt down hydrocarbons in atmosphere, on models with каталитическим the converter the monitoring system over allocation of steams of fuel from fuel system is established. The cap of a jellied mouth of a fuel tank is hermetically closed also the coal filter collects steams of gasoline formed in a fuel tank (model with fuel injection) or in a fuel tank and поплавковой to the carburettor chamber (model with the carburettor engine) when the car is at a stop. Steams remain in the coal filter until they cannot be let out in the inlet channel at engine work.

On models with the carburettor engine system work the thermovacuum valve which is established in an inlet collector operates; the thermovacuum valve, also, operates system work рециркуляции exhaust gases. When the engine the cold, thermovacuum valve closes depression receipt on vacuum мембранный the valve of the coal filter and the filter remains is closed. When the engine gets warm to normal working temperature (approximately 70 ), the thermovacuum valve opens also the depression which is present at an inlet collector influences a diaphragm of the coal filter. The membrannyj valve opens also all steams which have gathered in the coal filter, are tightened in the inlet channel with the subsequent combustion in following cycles of work of the engine.

On models "Phase I" (release till June, 1993) with the engine in volume of 2,0 litres and multidot system of injection of fuel the coal filter is connected directly to an inlet collector and system work the restrictive valve on vacuum мембранном the filter valve operates. When the engine works, the depression which is present at an inlet collector, influences a diaphragm through the restrictive valve. At engine work in a mode of idling the valve is closed, but, at increase in speed of work of the engine, depression in an inlet collector increases. The restrictive valve increases depression behind a diaphragm, thus, supervising opening мембранного the valve depending on speed of work of the engine. The valve is opened a little at low speed of work of the engine, but opens completely at increase in speed of work of the engine.

On all models work of the monitoring system on allocation of steams of fuel from fuel system copes with injection of fuel the electronic block of management of the engine through the electromagnetic valve; the same electromagnetic valve operates system work рециркуляции exhaust gases. That the engine correctly worked after cold start and / or in an idling mode, and also for protection каталитического the converter at receipt in the engine of too rich fuel mix, the electromagnetic valve does not open the electronic block of management while the engine will not be heated-up or on it loading will not be given. After that, the electromagnetic valve opens that collected steams of fuel could get to the inlet channel.

System рециркуляции exhaust gases

This system reduces the maintenance of not burnt down hydrocarbons in exhaust gases while they have not got in каталитический the converter. For this purpose some part of exhaust gases gets from a final collector and is issued back in an inlet collector, through a tube connecting them then they again participate in engine work. The valve рециркуляции exhaust gases is established that end of a connecting tube which fastens to an inlet collector.

On models with the carburettor engine system work the thermovacuum valve and the valve противодавления operates. The thermovacuum valve, also, supervises work of the monitoring system on allocation of steams of fuel from fuel system. When the engine the cold, thermovacuum valve stops depression receipt on the valve рециркуляции, and it remains is closed. When the engine is heated-up to normal working temperature (approximately 70 ), the thermovacuum valve opens, allowing depression to influence the valve рециркуляции through the valve противодавления. The valve противодавления is sensitive to pressure of exhaust gases and, according to it, opens or closes the valve рециркуляции. When pressure of exhaust gases high, the valve противодавления is closed that allows depression to influence the valve рециркуляции, opening it. When pressure of exhaust gases falls, the valve противодавления opens, stopping depression receipt on the valve рециркуляции, the valve is closed.

On models with fuel injection, the system рециркуляции exhaust gases copes the electronic block of management of engine work through the electromagnetic valve and the valve противодавления; the electromagnetic valve also operates work of the monitoring system on allocation of steams of fuel from fuel system. When the engine the cold, electronic block of management of engine work holds the electromagnetic valve closed, stopping depression receipt on the valve рециркуляции. When the engine gets warm to normal working temperature, the electronic block of management opens the electromagnetic valve, allowing depression to influence the valve рециркуляции through the valve противодавления. The valve противодавления is sensitive to pressure of exhaust gases and, according to it, opens or closes the valve рециркуляции. When pressure of exhaust gases high, the valve противодавления is closed that allows depression to influence the valve рециркуляции, opening it. When pressure of exhaust gases falls, the valve противодавления opens, stopping depression receipt on the valve рециркуляции, the valve is closed.

System of thermal neutralisation of exhaust gases

This system reduces the maintenance of not burnt down hydrocarbons in exhaust gases, without supposing their excessive hit in exhaust gases. It is reached by giving of additional quantity of air in an inlet collector, when depression in an inlet collector very high. The system includes only one valve.

The valve of system of thermal neutralisation of exhaust gases is sensitive to pressure in an inlet collector. If in an inlet collector too high depression (i.e. when throttle заслонка it is closed at high speed of work of the engine) is formed, the valve opens and passes in an inlet collector a portion of fresh filtered air from a casing of the air filter.

System of an admission of air in a final collector

The system of an admission of air in a final collector reduces the maintenance of not burnt down hydrocarbons (HC) and carbonic gas (WITH) in exhaust gases, passing a part of air filtered by the air filter directly in a final collector that the considerable part of molecules of not burnt down hydrocarbons and carbonic gas could be oxidised in a final collector before hit in каталитический the converter. The system includes the valve of giving of air and the electromagnetic valve operated the electronic block of management by work of the engine.

That the engine correctly worked after cold start and / or in an idling mode, the electromagnetic valve does not open the electronic block of management while the engine will not get warm and on it loading will be given. When both these come conditions, the electromagnetic valve opens that a portion fresh, filtered by the air filter, air could get to a final collector. For a fence of air from the air filter the difference between pressure in a final collector and the air filter is used, therefore there is no necessity to use the air pump for air giving. The valve of giving of air passes air only in one direction, therefore exhaust gases cannot get to the air filter.

System of decrease in toxicity of exhausts at engine work in an idling mode

The system of minimisation of emission of exhaust gases idling the engine serves that the fuel mix did not become too rich at an engine heat. It is reached by an admission of additional quantity of air in an inlet collector at an engine heat. The system includes only one valve which is established on a casing of the air filter.

The valve of system of minimisation of emission of exhaust gases idling the engine has the bimetallic spring sensitive to temperature. At low temperature of the engine the valve is closed. When the temperature increases in a casing of the air filter, the bimetallic spring of the valve is deformed, and the valve gradually opens. It allows fresh, filtered by the air filter, to air to get to an inlet collector that increases the oxygen maintenance in a fuel mix.

Демпфер throttle заслонки

Демпфер throttle заслонки serves for decrease in the maintenance of not burnt down hydrocarbons in exhaust gases at deenergizing of the engine or sharp decrease in turns. It is reached by prevention of sharp closing throttle заслонки, for example, when the driver at high speed of work of the engine quickly releases an accelerator pedal. Демпфер throttle заслонки serves as the shock-absorber and slowly closes throttle заслонку at last stages. It reduces the maintenance of not burnt down hydrocarbons in exhaust gases, preventing formation in an inlet collector of too big depression that would lead to hit not burnt down till the end of fuel in a final collector.



6.4.1.2. Katalitichesky neutralizer

6.4.2.1. System of decrease in emission картерных gases