초록 ▼

The quality of a fuel-air mixture shall be evaluated by a process and a device during a phase of combustion, especially in a spark ignition engine, in order to make possible a low-emission, fuel-saving and knock-free operation. An electrical testing pulse P is sent for this purpose to the spark plug

The quality of a fuel-air mixture shall be evaluated by a process and a device during a phase of combustion, especially in a spark ignition engine, in order to make possible a low-emission, fuel-saving and knock-free operation. An electrical testing pulse P is sent for this purpose to the spark plug during the phase of combustion V following the ignition pulse Z. The effect of the actual fuel-air mixture of the combustion chamber on the testing pulse is detected and evaluated as an electrical variable.

대표청구항 ▼

[ What is claimed is:] [1.] A process for evaluating a air-fuel ratio of a air-fuel mixture during combustion, the process comprising the steps of;providing a combustion chamber for holding the air-fuel mixture, said combustion chamber including a spark plug;igniting the air-fuel mixture with an ele

[ What is claimed is:] [1.] A process for evaluating a air-fuel ratio of a air-fuel mixture during combustion, the process comprising the steps of;providing a combustion chamber for holding the air-fuel mixture, said combustion chamber including a spark plug;igniting the air-fuel mixture with an electric ignition pulse to said spark plug, said electric ignition pulse being generated at an ignition point in time;providing a time delay starting at said ignition point of time;applying an electric testing pulse P to the fuel-air mixture through said spark plug during combustion following said ignition pulse and after said time delay, said pulse continuing for a pulse duration;detecting an electrical effect of the air fuel ratio on said testing pulse as an electrical variable without use of an oxygen sensor to detect and evaluate an entire combustion range.