2892416 - Introduction - ENGINE
HARDENED AND TEMPERED STEEL
Special steel which has undergone a hardening and tempering treatment.Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.Tempering: consists of heating to a temperature of < 720°C followed by slow cooling, in order to attenuate the effects of the hardening without eliminating its effects. The material thus returns to a condition as close as possible to a stable chemical-physical balance.Hardening: this is obtained when the structure of the metal at high temperature is harder and stronger than when cold.CONDENSATION
This the reverse of evaporation, i.e. when a substance passes from the vapour state to the liquid state; it is obtained by compression or cooling.DETONATION
Phenomenon involving abnormal combustion, extremely rapid, of the part of the mixture which burns last.It is perceptible by the metallic noises in the cylinder head and a gradual reduction in power.The phenomenon is mainly associated with the engine's compression ratio and the characteristics of the fuel forming the mixture.EVAPORATION
Also called vaporization, this is the passage of a body from the liquid state to the gaseous state.It occurs at any temperature, but, when all other conditions are the same, all the more slowly the lower the temperature.RESONANCE
Phenomenon in which the amplitude of oscillations induced in a vibrating system tends, under particular conditions, to become intensified (amplified) beyond all limits.SENSOR
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.). For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, concentrations of gases such as nitric oxides, oxygen, etc.VISCOSITY
Property of matter whereby the particles of a body meet "resistance" in sliding in relation to each other. The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases. In liquids, viscosity decreases rapidly as temperature increases.Engine with 4 cylinders in line, 16 valves, 1580 cc, twin overhead camshaft, with Marelli IAW 49F.B2 integrated electronic injection/ignition system.VIEW OF ASSEMBLY
-
The unit comprises the engine and all the systems required for its operation:
- fuel supply system
- air supply system
- engine cooling system
- exhaust system with catalytic converter
- fuel vapour recirculation system.
Fuel supply system
It is the returnless type with an electric fuel pump immersed in the tank and a casing which incorporates the voltage regulator, the fuel gauge and the filter (for further details See subassembly 1040 FUEL TANK AND PIPES).Air supply system
Air supply system with plastic inlet manifold and large air filter casing to limit inlet noise (for further details See subassembly 1048 ENGINE AIR SUPPLY CIRCUITand See subassembly 1072 INLET AND EXHAUST MANIFOLDS).Exhaust system
The exhaust system is equipped with a three-way catalytic converter and a Lambda sensor (for further details See subassembly 1076 EXHAUST PIPES AND SILENCERS).Emission control system
The following emission control systems are fitted on this model:
- Exhaust emission control system with a three-way catalytic converter and Lambda sensor;
- crankcase vapour/gas recirculation system;
- fuel anti-evaporation system;