Method of stabilizing the idling run of an internal-combustion engine
AssigneeFEV Motorentechnik GmbH
InventorGünter Schmitz
Life of this patent
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Abstract
A method of regulating the idling run of an internal-combustion engine having a crankshaft, a plurality of cylinders each provided with intake and exhaust valves, a piston received for reciprocation in each cylinder and an engine control for variably controlling the intake and exhaust valves. The method includes the following steps during the idling run: determining the opening moment of the intake valves as a function of the angular position of the crankshaft and determining the closing moment of the intake valves by the engine control as a function of time.
Claims5
A method of stabilizing the idling run of an internal-combustion engine having a crankshaft, a plurality of cylinders each provided with intake and exhaust valves, a piston received for reciprocation in each cylinder and an engine control for variably controlling the intake and exhaust valves, comprising the following steps during the idling run:
- (a) opening the intake valves at a moment determined as a function of the angular position of the crankshaft and
- (b) closing the intake valves by the engine control at a moment determined as a function of time, whereby if an actual rpm exceeds a predetermined desired rpm, one part of a charge is returned from the cylinders into respective intake ports and if the actual rpm falls below the predetermined desired rpm, an increase of the charge in the cylinders is effected, without varying the open period between opening and closing moments as defined in steps (a) and (b).
Dependencies are inferred from the claim text.