RAV4 PAB4-Toyota Toyota
1. Car operation
2. Maintenance
3. Engines
   Engine 3S-FE repair without its removal from the car
   Engine 1AZ-FE repair without its removal from the car
      General information
      Specifications
      Installation of the piston of the first cylinder in the top dead point (VMT)
      Cover of a head of the block of cylinders
      System of change of phases of a gazoraspredeleniye (VVT — Variable Valve Timing)
      Chain of a drive of the gas-distributing mechanism and asterisk
      Camshafts and pushers of valves
      Inlet collector
      Final collector
      Head of the block of cylinders
      Pulley/quencher of fluctuations
      Forward sealing ring of a cranked shaft
      Oil pallet
      Oil pump
      Drive flywheel / plate
      Back sealing ring of a cranked shaft
      Support of the power unit
   Diagnostics and preparation of the engine for major maintenance
4. Cooling and conditioning systems
5. Fuel system and system of production of the fulfilled gases
6. Ignition system
7. The monitoring system and decrease in toxicity of the fulfilled gases
8. Coupling
9. Transmission
10. Driveshaft and shaft of a drive of driving wheels
11. Brake system
12. Suspension bracket
13. Steering and running gear
14. Body
15. Electric equipment
Electric equipment schemes




Toyota RAV4>> Engines>> Engine 1AZ-FE repair without its removal from the car>> System of change of phases of a gazoraspredeleniye (VVT — Variable Valve Timing)
The VVT system changes phases of a gazoraspredeleniye of a camshaft of inlet valves, turning a camshaft asterisk in one or other party. It depending on power setting increases engine capacity, reduces fuel consumption and issue of the fulfilled gases.

Fig. 3.54. An arrangement of the regulating oil valve (OCV) in a back part of a head of the block of cylinders


The system turns on the block of control of a power transmission (PCM — Powertrain Control Module), the regulating oil valve (OCV) (fig. 3.54) and knot of a pulley / drive of a camshaft of inlet valves.
The block of control of a power transmission (PCM) operates operation of the regulating oil valve (OCV) on the basis of information from the following sensors:
– sensor of speed of the car (VSS);
– sensor of provision of a butterfly valve (TPS);
– sensor of a measuring instrument of a consumption of air (MAP);
– the sensor of temperature of cooling liquid (ECT).
The regulating oil valve (OCV) put in action by the block of control (PCM), increases or reduces pressure of the oil submitted to a pulley / drive of a camshaft of inlet valves.
The asterisk of a camshaft of inlet valves is equipped with the internal plug which is attached to a camshaft. The internal plug consists of a number of the fixed blades in such a manner that pressure is used as a wedge for their turn and respectively camshaft turn. At increase in pressure of oil, the camshaft angle of rotation increases.
At supply of oil to blades from an advancing the drive can turn a camshaft on a corner to 21 ° clockwise. When oil moves from delay, the drive will start to turn a shaft counter-clockwise before situation 0 ° an advancing which is normal situation at operation of the engine on frequency of rotation of idling. The PCM block can send also a signal to the regulating oil valve to stop a stream of oil and to hold a camshaft in its current situation.
At operation of the engine with small loadings the VVT system will reduce a corner of an advancing of a camshaft therefore the period of overlapping of valves will decrease and engine capacity is stabilized.
At operation of the engine with average loadings the VVT system will increase a corner of an advancing of a camshaft to increase the period of overlapping of valves therefore engine capacity will increase and the quantity of harmful substances in the fulfilled gases will decrease.
At operation of the engine with big loadings at low frequency of rotation of a cranked shaft the VVT system will increase a corner of an advancing of a camshaft that were quicker closed inlet the valve therefore engine capacity on low and average frequency of rotation will increase.
At operation of the engine with big loadings at high frequency of rotation of a cranked shaft the VVT system will reduce a corner of an advancing of a camshaft to detain the moment of closing of inlet valves therefore engine capacity will increase.