Automatic calibration system and method for a dual fuel internal combustion engine
First Claim
Patent Images
1. A method for operating an engine, comprising:
- providing a first fuel into an engine cylinder;
injecting a second fuel into the engine cylinder at a start of injection (SOI) timing;
providing an engine parameter to a controller;
providing a cylinder parameter to the controller;
monitoring the engine parameter and the cylinder parameter with the controller;
comparing the engine parameter and the cylinder parameter in the controller with corresponding limits to determine a global error that is related to the engine parameter and a local error that is related to the cylinder; and
while each of the global error and the local error indicate that the engine parameter and the cylinder parameter are below the corresponding limits, automatically advancing the SOI timing with the controller for all engine cylinders,when the local error indicates that the cylinder parameter is above the corresponding limit, automatically retarding the SOI timing for a particular cylinder with the controller.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for automatically calibrating an engine operating with a first fuel and a second fuel includes comparing each of a plurality of engine operating parameters with a corresponding limit, determining whether any of the plurality of engine operating parameters has exceeded its corresponding limit and, while none of the plurality of engine operating parameters has exceeded its corresponding limit, automatically and incrementally advance start of injection timing.
20 Citations
20 Claims
-
1. A method for operating an engine, comprising:
-
providing a first fuel into an engine cylinder; injecting a second fuel into the engine cylinder at a start of injection (SOI) timing; providing an engine parameter to a controller; providing a cylinder parameter to the controller; monitoring the engine parameter and the cylinder parameter with the controller; comparing the engine parameter and the cylinder parameter in the controller with corresponding limits to determine a global error that is related to the engine parameter and a local error that is related to the cylinder; and while each of the global error and the local error indicate that the engine parameter and the cylinder parameter are below the corresponding limits, automatically advancing the SOI timing with the controller for all engine cylinders, when the local error indicates that the cylinder parameter is above the corresponding limit, automatically retarding the SOI timing for a particular cylinder with the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An engine having an engine cylinder for burning a mixture of a first fuel and a second fuel, comprising:
-
a first fuel system configured for providing the first fuel into the engine cylinder; a fuel injector configured for injecting the second fuel into the engine cylinder at a start of injection (SOI) timing; a first sensor operating to monitor a global engine parameter and to provide a first signal indicative of the global engine parameter; a second sensor operating to monitor a cylinder-specific parameter of the engine cylinder and provide second signal indicative of a cylinder-specific engine parameter; a controller disposed to receive the first signal and the second signal and operating to monitoring the global engine parameter and the cylinder-specific engine parameter; wherein the controller is configured to; compare the global engine parameter with a corresponding limit to determine a global error; compare the cylinder-specific parameter with a corresponding limit to determine a local error; and while the global error indicates that the engine parameter and the local error indicates that the cylinder-specific parameter are below their corresponding limits, automatically advance the SOI timing with the controller for all engine cylinders, and while the local error indicates that the cylinder-specific parameter is above the corresponding limit, automatically retard the SOI timing for the particular engine cylinder with the controller. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for automatically calibrating an engine operating with a first fuel and a second fuel, the method comprising:
-
comparing each of a plurality of global and local engine operating parameters with corresponding limits; determining whether any of the plurality of global and local engine operating parameters has exceeded its corresponding limit; while none of the plurality of global and local engine operating parameters has exceeded its corresponding limit, automatically and incrementally advance start of injection (SOI) timing for all engine cylinders; and in the event at least one of the local engine operating parameters exceeds its corresponding limit, retarding the start of injection timing for one of the engine cylinders at which the local engine operating parameter corresponds. - View Dependent Claims (19, 20)
-
Specification