Fuel conversion unit and system for an internal combustion engine vehicle, and method for adjusting fuel distribution

Abstract

Fuel conversion unit and system for an internal combustion engine vehicle, and method for adjusting fuel distribution. The invention relates mainly to a fuel conversion unit (1) for an internal combustion engine vehicle, the vehicle comprising at least one first injector (4) and at least one second injector (6) controllable by a microcontroller (7) of the conversion unit (1), which microcontroller (7) is further provided to retrieve an injection signal, which conversion unit (1) further comprises a fuel sensor (8), characterized in that the microcontroller (7) is configured to determine the composition of the fuel, and for each engine cycle: • Determine an injection duration of the first injector (4) from the data of the injection signal;• Determine an injection duration for the second injector (6) based on the injection duration of the first injector (4) and the determined fuel composition, and • Control the second injector (6) according to the determined injection duration to deliver an additional quantity of fuel. Figure to be published with the abbreviation: Fig. 1;

Claims

fuel sensor (8), and the following steps for each engine cycle: • Determination of an injection duration of the first injector (4) from the data of the injection signal (26); • Determination of an injection duration of the second injector (6) from the injection duration of the first injector (4) and the determined fuel composition, and • Control of the second injector (6) according to the determined injection duration to deliver an additional quantity of fuel.

9. Method according to the preceding claim, characterized in that the step of determining the duration of the injection of the second injector (6) is deduced from a table of correspondence between on the one hand values ​​of durations of the second injector (6) and on the other hand values ​​of durations of the first injector (4) and values ​​of fuel compositions, which table is stored in a memory space of the microcontroller (7).

10. A method according to claim 8 or 9, characterized in that the conversion box (1) comprises a temperature probe (11) connected to the microcontroller (7) and configured to measure the temperature of a cylinder head (22) of the engine, and in that the method comprises the following additional steps: • Measurement of the temperature of the cylinder head (22) of the engine; • Increase in the injection duration of the second injector (6) by a determined value during each engine cycle if the temperature is below a determined threshold temperature. [Fig. 1]