IP Library › Granted Patent US 9,518,525
Granted Patent B2
US 9,518,525 · App. 14/407,341 · Granted Dec 13, 2016

System and method of controlling fuel injection pressure in an engine having an in-cylinder pressure sensor

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Quick Facts
Patent No.
US 9,518,525
App. No.
14/407,341
Granted
Dec 13, 2016
Kind
B2
Abstract

A method of operating an internal combustion engine is provided. An in-cylinder pressure within a cylinder of the engine is determined. A fuel injection pressure from a fuel injector disposed within the cylinder is determined. A ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure is compared to a stored threshold value. The fuel injection pressure is adjusted based upon the comparison of the ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure to the stored threshold value.

Claims (10)

1. A method of operating an internal combustion engine having a plurality of cylinders, comprising:

providing a pressure sensor within a cylinder of the engine for generating a signal representative of the pressure within the cylinder in which the pressure sensor is disposed;

providing a fuel injector in communication with the cylinder having variable injection pressure capability;

determining a fuel injection pressure of a fuel injector disposed within the cylinder and generating a signal representative of the fuel injection pressure;

a fuel injector controller operatively connected with the pressure sensor and fuel injector for receiving the signals from the pressure sensor representative of the pressure within the cylinder and for receiving the signals representative of the fuel injection pressure:

the fuel injector controller configured to perform a calculation of the ratio of the in-cylinder pressure signals and the fuel injection pressure signals;

providing a database of stored threshold values of the ratio of the in-cylinder pressure signals to fuel injection pressure signals;

the fuel injection controller also configured to operate the injector to inject fuel into the cylinder at a predetermined fuel injection pressure based on a stored threshold value;

the fuel injection controller also configured to compare the ratio of the in-cylinder pressure and the fuel injection pressure; and

the fuel injector controller adjusting the fuel injection pressure based upon the comparison of the ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure to the stored threshold value.

Assignments (9)
RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 53545/443 Recorded Jul 15, 2021
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
To: NAVISTAR INTERNATIONAL CORPORATION; INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC; INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC; NAVISTAR, INC.
Reel/Frame 057441/0404 →
RELEASE OF SECURITY INTEREST Recorded Jul 2, 2021
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC; NAVISTAR, INC. (F/KA/ INTERNATIONAL TRUCK AND ENGINE CORPORATION); INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC
Reel/Frame 056757/0136 →
SECURITY INTEREST Recorded Apr 27, 2020
From: NAVISTAR INTERNATIONAL CORPORATION; INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC; INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC; NAVISTAR, INC. (F/K/A INTERNATIONAL TRUCK AND ENGINE CORPORATION)
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT
Reel/Frame 053545/0443 →
CORRECTIVE ASSIGNMENT TO CORRECT THE CONVEYING PARTY DATA PREVIOUSLY RECORDED AT REEL: 052483 FRAME: 0742. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY INTEREST.. Recorded Apr 27, 2020
From: NAVISTAR INTERNATIONAL CORPORATION; INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC; INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC; NAVISTAR, INC. (F/K/A INTERNATIONAL TRUCK AND ENGINE CORPORATION)
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 053457/0001 →
SECURITY INTEREST Recorded Apr 23, 2020
From: INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC; INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC; NAVISTAR, INC. (F/K/A INTERNATIONAL TRUCK AND ENGINE CORPORATION)
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 052483/0742 →
SECURITY INTEREST Recorded Nov 10, 2017
From: NAVISTAR INTERNATIONAL CORPORATION; NAVISTAR, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 044418/0310 →
RELEASE OF SECURITY INTEREST Recorded Nov 10, 2017
From: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
To: NAVISTAR INTERNATIONAL CORPORATION; INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC; INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC
Reel/Frame 044780/0456 →
SECURITY AGREEMENT Recorded Sep 15, 2015
From: NAVISTAR INTERNATIONAL CORPORATION; INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC; INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC
To: JPMORGAN CHASE BANK N.A., AS COLLATERAL AGENT
Reel/Frame 036616/0243 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 11, 2014
From: ZUKOUSKI, RUSSELL P.
To: INTERNATIONAL ENGINE INTELLECTUAL COMPANY, LLC.
Reel/Frame 034481/0964 →