AUTOMATIC TRANSMISSION AND ITS CONTROL METHOD Russian patent published in 2014 - IPC F16H61/02 F16H59/72 F02D29/02 F02D17/00 

FIELD: automobile production.

SUBSTANCE: automatic transmission includes an electric lube oil pump, an oil temperature determining device, a setting device of threshold values of a gradient, a gradient determining device, a device prohibiting automatic shut off and start of the engine at idle operation. The electric lube oil pump is brought into action when the engine is automatically stopped. The oil temperature determining device determines temperature of oil supplied to the electric lube oil pump. The setting device of threshold values of a gradient sets the threshold value of the gradient based on oil temperature. The gradient determining device determines the gradient of the road surface on which the transport vehicle has been stopped. The device prohibiting automatic shut off and start of the engine at idle operation prohibits automatic shut off and start of the engine at idle operation. A control method consists in the fact that oil temperature is determined, the threshold value of gradient is set, which is lower than threshold value of gradient at ordinary oil temperature when oil temperature is lower or higher than ordinary temperature, road surface gradient is determined, and automatic shut off and start of the engine is prohibited at idle operation when the gradient exceeds the specified threshold value of the gradient.

EFFECT: preventing backward movement of a transport vehicle at starting from standstill.

2 cl, 6 dwg