Method for smoothing out acceleration jerks of a vehicle propelled by an internal-combustion engine
AssigneeSiemens Automotive Corporation
InventorsOlivier Pioch, Dominique Martineau, Henri Dupont
Life of this patent
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Abstract
An entry into an acceleration phase of the vehicle is detected, the ignition advance of the engine is then reduced to a predetermined value (a.sub.L) and the advance is maintained at this value for a predetermined time interval (.DELTA.t) which is a function of the selected gear ratio (r) of a gearbox placed on the output side of the engine. Application to a vehicle propelled by an internal-combustion engine associated with an ignition- and injection-control computer.
Claims10
A method for smoothing out acceleration jerks of a motor vehicle propelled by an internal combustion engine and having a gearbox at an output side of the internal combustion engine, which comprises:
- detecting an entry into an acceleration phase of the vehicle;
- reducing an ignition advance angle of the engine to a predetermined value and maintaining the ignition advance at the predetermined value for a given time interval, wherein the given time interval is a function of a selected gear ratio of the gearbox at the output side of the engine;
- and
- selecting the given time interval .DELTA.t from ##EQU6## A, B and C are constants, and t.sub.1 is a duration of an acceleration requested by a driver of the vehicle.
A method for smoothing out acceleration jerks of a motor vehicle propelled by an internal combustion engine and having a gearbox at an output side of the internal combustion engine, which comprises:
- detecting an entry into an acceleration phase of the vehicle;
- reducing an ignition advance angle of the engine to a predetermined value by uniformly decrementing the ignition advance prior to the entry into the acceleration phase with advance calculating and controlling means associated with the engine, and maintaining the ignition advance at the predetermined value for a given time interval, wherein the given time interval is a function of a selected gear ratio of the gearbox at the output side of the engine;
- and
- inhibiting the controlling means on detecting an entry into the acceleration phase.
Dependencies are inferred from the claim text.