Method and device for controlling an internal combustion engine

Abstract

The method involves changing a switching phase of a stroke (200) and an inlet valve (160) i.e. butterfly valve, of a valve stroke changing device (220) with lean-burn phase when air-fuel ratio exhibits a value larger than one and a firing angle exceeds a maximum firing angle. A filling change device (100) is controlled such that filling at beginning of the switching phase and filling at end of the switching phase are equal. The filling change device changes size of the filling according to valve position. Independent claims are also included for the following: (1) an electrical memory medium comprising a computer program for controlling torque curve of a lean executable internal combustion engine (2) a control and / or regulating device for controlling torque curve of a lean executable internal combustion engine.

Description

technical field

[0001] The invention relates to a method of the type according to the independent claims. Furthermore, objects of the invention are a computer program, an electrical storage medium and a control and regulating device. Background technique

[0002] Internal combustion engines incorporating engine controls to provide multiple types of operation and multiple injections per working cycle are generally known. Also known are switching techniques for reducing the consumption of the intake valve stroke of internal combustion engines. As a result, gas-saving losses and consumption can be significantly reduced, especially in comparable gasoline engines. In particular, the switching of the intake valve strokes can be carried out with cylinder-selective actuators.

[0003] Particularly cost-effective are systems for switching the strokes of the intake valves which comprise only one actuator for switching all the strokes of the intake valves. In these systems, the swi...

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