3.3.3. System of electronic control (RSM)

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

The control unit of the 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 the automatic transmission is created by the pump, it is regulated by a control system depending on loading and the speed of the car and ensures functioning of the hydrotransformer, blocking couplings and brakes.

Valves of switching operate liquid streams which come to the hydrotransformer and the planetary transmission.

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

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 – sensor of temperature of cooling liquid of the engine; 10 – car speed sensor; 11 – turbine sensor of speed; 12 – sensor of provision of a bent shaft; 13 – the operating valve (with the sensor of temperature of liquid of the transmission and electromagnetic valves); 14 – switch of ranges of the automatic transmission; 15 – oil pressure sensor

Fig. 3.75. Flowchart 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 bent shaft; 8 – sensor of a mass consumption of air; 9 – switch of signals of braking; 10 – sensor of temperature of cooling liquid of the engine; 11 – output signals of engine management; 12 – communication channel socket; 13 – HOLD mode switch; 14 – turbine sensor of speed; 15 – car speed sensor; 16 – the transmission liquid temperature sensor in the block with the main transfer; 17 – switch of ranges of the automatic transmission; 18 – oil pressure sensor; 19 – output 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