Patent ID: 9222431
Filing Date: 2015-12-29
Classification: F02D,F02M

Abstract:
1. A method for estimating a leakage fuel quantity which penetrates an intake section or a cylinder of an internal combustion engine of a motor vehicle from a leaking injection valve during a shut-down time of the motor vehicle, and during a starting process is added to a fuel mixture to be burnt, the method comprising: measuring a first start index characteristic of a starting behavior of the internal combustion engine during a first starting process, determining a first injected fuel quantity during the first starting process, measuring a second start index characteristic of a starting behavior of the internal combustion engine during a second starting process, determining a second injected fuel quantity during the second starting process, and estimating the leakage fuel quantity based on the measured first start index, the determined first injected fuel quantity, the measured second start index, and the determined second injected fuel quantity.