Fuel property determination system
First Claim
Patent Images
1. A fuel property determination system for an internal combustion engine, comprising:
- a control unit configured to determine a fuel property indicative that fuel in use is heavy or light, on the basis of a degree of change of a revolution speed during a period from an expansion stroke of a first fuel injection cylinder at engine start to an expansion stroke of a final fuel injection cylinder in a first round as to all cylinders of the engine.
1 Assignment
0 Petitions
Accused Products
Abstract
A fuel property determination system for an internal combustion engine is arranged to determine a fuel property indicative that fuel in use is heavy or light, on the basis of a degree of change of a revolution speed during a period from an expansion stroke of a first fuel injection cylinder at engine start to an expansion stroke of a final fuel injection cylinder in a first round as to all cylinders of the engine.
-
Citations
28 Claims
-
1. A fuel property determination system for an internal combustion engine, comprising:
a control unit configured to determine a fuel property indicative that fuel in use is heavy or light, on the basis of a degree of change of a revolution speed during a period from an expansion stroke of a first fuel injection cylinder at engine start to an expansion stroke of a final fuel injection cylinder in a first round as to all cylinders of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
25. A method of determining a fuel property of fuel in use for an internal combustion engine, comprising:
- determining a fuel property indicative that fuel in use is heavy or light, on the basis of a degree of change of a revolution speed during a period from an expansion stroke of a first fuel injection cylinder at engine start to an expansion stroke of a final fuel injection cylinder in a first round as to all cylinders of the engine.
-
26. A fuel property determination system for an internal combustion engine, comprising:
-
a control unit configured to;
detect a degree of change of a revolution speed during a period comprising a predetermined stroke of a cylinder being involved with a first fuel injection thereto, and determine a fuel property being indicative of a specific gravity of fuel in use on the basis of the degree of change of the revolution speed. - View Dependent Claims (27, 28)
-
Specification