Control methodology for an internal combustion engine that utilizes a combustion condition sensor
AssigneeBombardier Motor Corporation of America
InventorSebastian Strauss
Life of this patent
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Abstract
An internal combustion engine that utilizes a control system for improving operation of the engine under a variety of conditions. The control system includes a sensor that directly senses a combustion condition in a cylinder. The output of the sensor is utilized in adjusting the air-fuel mixture delivered to other, non-sensed cylinders to optimize engine operation.
Claims38
A method for controlling the operation of an internal combustion engine having a plurality of cylinders and a controller that utilizes a fuel map, comprising:
- creating a reference combustion condition in a sensed cylinder of the internal combustion engine;
- sensing the reference combustion condition;
- determining whether the reference combustion condition is a desired combustion condition;
- adjusting a first fuel amount introduced to the sensed cylinder to move the combustion condition towards the desired combustion condition to determine a desired first fuel amount;
- and
- correcting a second fuel amount introduced into a non-sensed cylinder based on the a comparison of the desired first fuel amount and a current operating parameter fuel amount.
A method for controlling the operation of a watercraft, comprising:
- powering the watercraft with an internal combustion engine having a plurality of cylinders;
- sensing a combustion condition in a sensed cylinder of the internal combustion engine;
- determining whether the combustion condition is a desired combustion condition;
- adjusting a first fuel amount introduced to the sensed cylinder to move the combustion condition towards a desired combustion condition to determine a desired first fuel amount;
- and
- correcting a second fuel amount introduced into a non-sensed cylinder based on a comparison of the desired first fuel amount and a current operating parameter fuel amount.
A system for controlling operation of an internal combustion engine having a plurality of cylinders and a controller that utilizes a fuel map, comprising:
- means for sensing a combustion condition in a sensed cylinder of the internal combustion engine;
- means for determining whether the combustion condition is a desired combustion condition;
- means for adjusting a first fuel amount introduced to the sensed cylinder to move the combustion condition towards the desired combustion condition to determine a desired first fuel amount;
- and
- means for correcting a second fuel amount introduced into a non-sensed cylinder based on a comparison of the desired first fuel amount and a current operating parameter fuel amount.
A system for controlling combustion in an engine, comprising:
- a direct, fuel-injected, two-stroke engine having a plurality of cylinders with each cylinder being coupled to a fuel injector and a pair of electrodes for producing an ignition spark;
- a combustion condition sensor coupled to a sensed cylinder of the plurality of cylinders and able to produce an output indicative of a combustion condition;
- a first control unit able to adjust a first fuel amount injected into the sensed cylinder such that the combustion condition moves toward a desired combustion condition;
- and
- a second control unit having a pre-established fuel map for injecting specific quantities of fuel into each cylinder under a given operating condition, wherein the fuel map for non-sensed cylinders is adjusted according to the output of the combustion condition sensor.
Dependencies are inferred from the claim text.