Toyota RAV4>> Ignition system>> The general data>> Contactless system of ignition
On models with 1996 for 1998 it was established usual contactless the ignition systems, consisting of the lock of ignition, the storage battery, the distributor and the coil of ignition, the electronic control block (ЕСМ), the gauge of an angle of rotation of a cranked shaft, spark plugs and wires.
The electronic control block (ЕСМ) operates installation of a corner of an advancing of ignition on the basis of signals from the gauges supervising power setting, such as frequency of rotation, quantity of air arriving in the engine, temperature of a cooling liquid, etc., on all operational modes. Block ESM is located on the right side in a motor compartment.
This contactless system of ignition includes the inductive gauge located in the distributor of ignition, the coil of ignition fixed on an inlet collector about the distributor of ignition, and the switchboard located in a motor compartment.
On models with 1998 for 2001 the switchboard with ignition coils are executed in the form of the uniform block established on an arm, on an inlet collector.
On models since 2001 blocks the ignition switchboard/coil on each cylinder were established, is direct on spark plugs, application of high-voltage wires thus was not required.
On models with 1998 for 2001 the contactless system of ignition consists of the gauge of position of a camshaft, the gauge of an angle of rotation of a cranked shaft, ignition coils (one coil on 2 цил.) The switchboard and the engine management block (PCM). The coil of ignition and the switchboard are executed in the form of the uniform block and established from the forward party of the engine. On the basis of signals of gauges of position of a camshaft and an angle of rotation of a cranked shaft, the engine management block identifies the cylinder, and submits an operating impulse on the switchboard for spark giving to the corresponding cylinder. Each coil of ignition actually consists of 2 separate high-voltage windings which submit a spark to two cylinders everyone (one to cylinders № 1 and 4, and another to cylinders № 2 and 3). The ignition impulse moves at once on two spark plugs for each cycle of the engine, one on the compression step, one on an exhaust step — the ignition spark on a step of release does not render any value for engine work and consequently is spent "empty". The engine management block (PCM) uses signals from various gauges to calculate a demanded corner of an advancing of ignition and time of accumulation of energy in the ignition coil.
On models since 2001 the contactless system of ignition consists of the gauge of position of a camshaft, the gauge of an angle of rotation of a cranked shaft, blocks of the coil of ignition / of the switchboard / of the spark plug, established on everyone cylinder and the engine management block (PCM). On the basis of signals of gauges of position of a camshaft and an angle of rotation of a cranked shaft the engine management block identifies the cylinder and submits an operating impulse on the corresponding block of the coil of ignition/switchboard/spark plug, and also calculates demanded installation of a corner of an advancing of ignition and time of accumulation of energy in the ignition coil.