Internal combustion engine for operation with two different knock resistant fuels
AssigneesGM Global Technology Operations LLC, BRA GmbH
InventorsAndreas Jauss, Mathias Braune
Life of this patent
Estimating the term…
Abstract
The invention relates to an internal combustion engine which can be operated with at least two fuels that have different knock resistance and which comprises at least one cylinder in which combustion of the fuel takes place cyclically. Said engine is provided with a dosing system for feeding a controlled quantity of fuel to the cylinder in every cycle. The dosing system is designed in such a manner that, when fuels are used that are less resistant to knocking, the quantity of air-fuel mixture supplied is maintained below a threshold quantity at which there is no danger of knocking.
Claims15
An internal combustion engine for operation with at least two fuels of different knock resistances, comprising:
- at least one cylinder in which the combustion of fuel takes place cyclically;
- and
- a metering system (14) to supply to the cylinder in each cycle a quantity of air-fuel mixture regulated by way of a control signal, wherein the metering system (14) is designed to supply a first quantity of air-fuel mixture at a specific value of the control signal when using a fuel that is less knock resistant, this first quantity being smaller than a second quantity that is supplied at the same value of the control signal when using the more knock resistant fuel.
A process for operation of an internal combustion engine, comprising:
- selecting one fuel from at least two fuels possessing different knock resistances;
- cyclically supplying a cylinder of the engine with regulated quantities of a mixture of air and fuel in dependence on a control signal;
- and
- combusting the air and fuel mixture within the cylinder;
- wherein the supplied quantity is further regulated in dependence on the type of fuel supplied in the mixture, with the quantity supplied for a fuel with lower knock resistance, at least under defined operating conditions, being smaller than for a fuel with higher knock resistance at the same value of the control signal.
Dependencies are inferred from the claim text.