3.3.3. System of electronic control (RSM)

The RSM block of an automatic transmission is incorporated with the engine control unit. The RSM block of the car gives out an operating signal on the engine and a transmission according to signals of all sensors and/or switches.

The control unit an avtomatchesky transmission is responsible for operation of the pump, the operating valve, electromagnetic valves, hydroaccumulators, blocking couplings and brakes. The main pressure in hydraulic system of an automatic transmission is created by the pump, it is regulated by a control system depending on loading and speed of the car and ensures functioning of the hydrotransformer, blocking couplings and brakes.

Valves of switching operate streams of liquid which arrive in the hydrotransformer and a planetary transmission.

The block of valves has three electromagnetic valves which operate gear shifting and hydrotransformer blocking.

Fig. 3.74. System of electronic control of the Mazda 3 car: 1–control lamp of the HOLD mode; 2–speedometer; 3–switch of signals of braking; 4–PCM block; 5–HOLD switch; 6–sensor of provision of a butterfly valve; 7–DLC; 8–sensor of a mass consumption of air; 9–the sensor of temperature of cooling liquid of the engine; 10-sensor of speed of the car; 11-turbine sensor of speed; 12-sensor of provision of a cranked shaft; 13-the operating valve (with the sensor of temperature of liquid of a transmission and electromagnetic valves); 14-switch of ranges of an automatic transmission; 15-sensor of pressure of oil

Fig. 3.75. Block diagram of a control system of the Mazda 3 car: 1–RSM block; 2–control system of the engine; 3–a transmission control system in the block with the main transfer; 4–system of onboard diagnostics; 5–entrance signals; 6–sensor of provision of a butterfly valve; 7–sensor of provision of a cranked shaft; 8–sensor of a mass consumption of air; 9–switch of signals of braking; 10-the sensor of temperature of cooling liquid of the engine; 11-target signals of engine management; 12-communication channel socket; 13-HOLD mode switch; 14-turbine sensor of speed; 15-sensor of speed of the car; 16-the sensor of temperature of liquid of a transmission in the block with the main transfer; 17-switch of ranges of an automatic transmission; 18-sensor of pressure of oil; 19-target signals; 20-solenoid of switching of A; 21-solenoid of switching of B; 22-solenoid of switching of C; 23-solenoid of switching of D; 24-solenoid of switching of E; 25-solenoid of regulation of pressure; 26-speedometer signal; 27-control lamp of the HOLD mode