Control device for an electric engine driven vehicle
AssigneeSiemens Aktiengesellschaft
InventorsMichael Albert, Thomas Reckhorn
Life of this patent
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Abstract
To recreate the familiar vehicle behavior of vehicles with internal combustion engines, a simulated engine drag torque is provided through controlled braking of the electric engine after release of the accelerator pedal or the brake pedal. To increase the driving comfort and, in addition, to save energy carried on board in the vehicle's energy storage device, the simulated engine drag torque sets in only upon reaching a minimum threshold value of a speed increase after the accelerator pedal or the brake pedal is released.
Claims21
Control device for a vehicle propelled by an electric engine, providing:
- a simulated engine drag torque through control of the electric engine upon release of a previously actuated accelerator pedal or a previously actuated brake pedal of the vehicle,
- a characteristic of the simulated engine drag torque as a function of an engine brake current (IB) or a parameter algebraically proportional to the engine brake current, wherein the engine brake current or the algebraically proportional parameter is variable with respect to at least one of an engine speed (n) or a vehicle speed (v), and
- an onset of the simulated engine drag torque as a function of reaching a minimum, non-zero threshold value of an engine speed increase (Δn) or a vehicle speed increase (Δv) after release of the accelerator pedal or the brake pedal.
Control device for a vehicle propelled by an electric engine, providing:
- a simulated engine drag torque through control of the electric engine upon release of a previously actuated accelerator pedal or a previously actuated brake pedal of the vehicle,
- a characteristic of the simulated engine drag torque as a function of an engine brake current (IB) or a parameter algebraically proportional to the engine brake current, wherein the engine brake current or the algebraically proportional parameter is variable with respect to at least one of an engine speed (n) or a vehicle speed (v), and
- an onset of the simulated engine drag torque as a function of reaching a minimum, non-zero threshold value of an engine acceleration or a vehicle acceleration after release of the accelerator pedal or the brake pedal.
A method for propelling a vehicle with an electric engine, comprising:
- actuating an accelerator pedal of the electric engine;
- and
- controlling the electric engine to simulate an engine drag torque,
- wherein an amount of the simulated engine drag torque is a function of an electrical engine brake parameter, and
- wherein the simulated engine drag torque is suppressed from commencing until an actual differential value reaches a threshold differential value.
A control device for a vehicle propelled by an electric engine, comprising:
- a first input for at least one of a base value of a engine speed (n0) or a base value of the vehicle speed (v0), wherein the base value is triggered in response to an operational change in actuation of at least one of an accelerator pedal of the vehicle or a brake pedal of the vehicle;
- a second input for at least one of a threshold engine speed increase value (Δn) and a threshold vehicle speed increase value (Δv);
- a third input for at least one of a measured engine speed or a measured vehicle speed;
- and
- an element suppressing for a time a signal to simulate an engine drag torque based on a result of processing signals from said first, second and third inputs.
Dependencies are inferred from the claim text.