Patent ID: 9506415
Filing Date: 2016-11-29
CPC Classification: F02D

Claim Text:
1. A method of modifying the performance of an internal combustion engine of a motor vehicle including fuel injectors, an oxygen sensor for measuring the amount of oxygen in the exhaust gas produced by the internal combustion engine, and a preprogrammed electronic control unit for receiving a voltage signal from the oxygen sensor, and in response thereto producing fuel injector control signals controlling the operation of the fuel injectors, the method comprising the steps of: interposing a controller between the oxygen sensor and the preprogrammed electronic control unit so as to direct the voltage signal of the oxygen sensor to the controller and not to the preprogrammed electronic control unit; receiving the voltage signal of the oxygen sensor by said controller; altering said voltage signal by said controller by chopping said voltage signal between a low threshold voltage and a high threshold voltage while retaining the original amplitudes of said voltage signal to produce an altered voltage signal; outputting said altered voltage signal by said controller; receiving said altered voltage signal by the preprogrammed electronic control unit; and controlling the fuel injectors by said preprogrammed electronic control unit to produce a modified fuel mixture that is different from a fuel mixture that would have been produced absent said altered voltage signal.