Patent ID: 7665808

Claim:
A method of assistance in starting a vehicle including a power unit and an automatic parking brake equipped with a mechanism of executing a command to release or deactivate the automatic parking brake, comprising, at least after one starting phase of the power unit: estimating a transmitted torque value required to balance the vehicle on a slope; executing in a loop an incremental calculation comprising: reading an effective average torque value (Cme) associated with a dynamic stage of the power unit, reading an engine speed value (Wm), calculating a time derivative of the engine speed, determining a moment of inertia of the power unit (Jmot) and calculating a load moment in a form of a product of the moment of inertia of the power unit by the time derivative of the engine speed, and determining an estimation of torque actually transmitted at a given moment (ECT) according to an equation: ECT=Cme−Jmot×dWm/dt, wherein the loop is executed while the estimation of the torque actually transmitted is insufficient to surpass the estimation of the transmitted torque required to balance the vehicle on the slope; and after the executing, producing a starting or deactivation command of the automatic parking brake.