9.1.7. Management of system of ignition
Fig. 9.4. Elements of a control system of ignition: 2/14 — the system relay of the engine; 3/1 — the ignition switch; 4/1 — the block of a control system of the Fenix 5.1 engine; 4/17 — 1, 4/17 — 2 — ignition coils; 8.20 — ignition condenser; 11/2 — the block of safety locks in passenger salon;
24/20 — the 22-contact socket of a plait of passenger salon (C) a plait of a compartment of the engine (A) (gray); 24/27 — the 12-contact socket of a plait of a compartment of the engine, (And) a plait of the module of management of the engine (ESM); 31/25 — a ground contact at the module of management of system of injection of fuel
In fig. 9.4
elements of management of system of ignition Fenix 5.1 and the approximate place of their arrangement are presented.
The electric circuit of connection of elements is shown on a color tab.
The control unit counts a corner of an advancing of ignition and operates operation of the switchboard, receiving signals from following sensors. The switchboard interrupts current of primary winding of the coil of ignition of 4/17 (fig. 9.4)
, directing high voltage in a secondary winding. High-voltage impulses are distributed and move on spark plugs.
The following sensors send signals to BU:
— sensor of frequency of rotation and provision of a bent shaft of the engine;
— sensor of position of the camshaft;
— pressure sensor in the inlet pipeline;
— air temperature sensor;
— sensor of temperature of cooling liquid of the engine;
— sensor of provision of a butterfly valve;
— detonation sensors;
— BU automatic transmission.
Ignition advancing corner constant during launch of the engine. When the engine already works and the car begins the movement, BU counts an optimum angle of an advancing on the basis of data on the frequency of rotation of the engine, loading and temperature. BU does not control operation of sensors of a detonation until the engine does not get warm up to the working temperature. If in the cylinder the detonation begins, the corner of an advancing of ignition decreases before its termination then there is a restoration of an advancing to normal value or before return of a detonation.
If these measures were insufficient for the termination of a detonation, the amount of injectable fuel increases, at the expense of it combustion temperature decreases. Before transfer switching the automatic transmission
sends request for management of torque to the control unit what BU reacts short-term reduction of a corner of an advancing of ignition to. BU also sends a confirmation signal to the control unit of the transmission which in turn provides transfer switching. Change of a corner of an advancing of ignition can make from 3 ° to 27 ° depending on value of loading of the engine. Together with the BU switchboard performs function on regulation of current of the coil of ignition, providing constantly optimum accumulation of energy, irrespective of the frequency of rotation of the engine.