Cylinder-head-integrated diesel injection system with oil sensor

• US 6,880,528 B2
• Filed: 02/28/2003
• Issued: 04/19/2005
• Est. Priority Date: 04/18/2002
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Unruh, Marcus, Warga, Johann, Klügl, Wendelin
• Primary Examiner(s): Gimie, Mahmoud
• Application Number:
  US10/376,741
• Publication Number:
  US 20040035398A1
• Time in Patent Office: 781 Days
• Field of Search: 123/470, 123/468, 123/469, 123/446, 123/198.D
• US Class Current: 123/470
• CPC Class Codes: F01M 11/10 Indicating devices; Other safety devices
• CPC Class Codes: F02B 2075/1816 four
• CPC Class Codes: F02B 2275/14 Direct injection into combustion chamber
• CPC Class Codes: F02B 2275/18 DOHC [Double overhead camshaft]
• CPC Class Codes: F02B 3/06 with compression ignition compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02
• CPC Class Codes: F02B 75/20 with cylinders all in one line
• CPC Class Codes: F02M 55/002 Arrangement of leakage or drain conduits in or from injectors
• CPC Class Codes: F02M 55/025 Common rails
• CPC Class Codes: F02M 61/14 Arrangements of injectors with respect to engines; Mounting of injectors
• CPC Class Codes: F02M 63/0205 for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors safety devices acting on engine fuel system on lubricant pressure failure F01M1/24; for cutting-out pumps for stopping the engine
• CPC Class Codes: F02M 63/0225 Fuel-injection apparatus having a common rail feeding several injectors F02M63/0003 takes precedence; Means for varying pressure in common rails; Pumps feeding common rails
• CPC Class Codes: F16N 2200/00 Condition of lubricant
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

The present invention relates to an accumulator-type injection system for injecting fuel from an accumulator into a combustion chamber of an internal combustion engine by means of injectors, the injectors being arranged completely within the cylinder head of the internal combustion engine.

Claims

1. An accumulator-type injection system for injecting fuel from an accumulator into a combustion chamber of an internal combustion engine via injectors and to detect fuel leaks, said system comprising:

injectors arranged completely within a cylinder head of the internal combustion engine; and

an oil sensor to sense the quality of engine oil for determining fuel leaks.

2. The system as claimed in claim 1, wherein the accumulator is arranged within the cylinder head of the internal combustion engine.

3. The system as claimed in claim 1, wherein the accumulator is arranged directly on or at the cylinder head of the internal combustion engine.

4. The system as claimed in claim 1, wherein the oil sensor further senses a level of the engine oil.

5. The system as claimed in claim 1, wherein the oil sensor is arranged in an oil pan of the internal combustion engine.

6. The system as claimed in claim 1, wherein the oil sensor senses the dielectricity of the oil.

7. The system as claimed in claim 6 further comprising a display device for displaying a change in the dielectricity of the oil.

8. The system as claimed in claim 1 further comprising a leakage line or a fuel return flow line arranged within the cylinder head.

9. The system as claimed in claim 1, wherein the system is adapted for use in a common rail injection system for diesel engines.