Internal combustion engine with indirect fuel injection

• US 3,890,940 A
• Filed: 05/25/1973
• Issued: 06/24/1975
• Est. Priority Date: 05/25/1972
• Status: Expired due to Term

• Current Assignee: Hans List
• Original Assignee: Hans List
• Inventors: List, Hans
• Primary Examiner(s): Myhre, Charles J.
• Assistant Examiner(s): Argenbright, Tony
• Application Number:
  US05/364,530
• Time in Patent Office: 760 Days
• Field of Search: 123/32SP,33VC,32SJ,32K,32L,32C,191S,191SP
• US Class Current: 123/293
• CPC Class Codes: F02B 19/14 with compression ignition
• CPC Class Codes: F02B 23/04 the combustion space being subdivided into two or more chambers with pre-combustion chambers F02B19/00
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An internal combustion engine with indirect fuel injection comprising an antechamber or turbulence chamber connected with the combustion chamber portion located above the piston by means of at least two overflow apertures whose axes cross or intersect in the portion of the combustion chamber located above the piston.

Claims

1. In an internal combustion engine with indirect fuel injection, a cylinder having a cylinder axis, a piston located in said cylinder and having a piston head, a trough-shaped recess provided in said piston head, a cylinder head, a main combustion chamber formed between the cylinder head and the piston head, a hollow insert disposed in the cylinder head and having an axis forming an acute angle with the cylinder axis, said insert forming an auxiliary combustion chamber, a plug closing said insert at one end and having a central bore, a fuel injection nozzle protruding into said central bore in alignment with the axis of said insert, a lateral bore in the cylinder head extending also into said insert, a spark plug disposed in said lateral bore and protruding into said insert, the insert having an axial extension opposite the fuel injection nozzle and having a smaller diameter than the remaining portion of the insert, said extension protruding into the main combustion chamber in a peripheral area of said trough-shaped recess of the piston head, two overflow apertures provided in said extension and having axes being coplanar with the cylinder axis and intersecting inside the main combustion chamber, said axes of the overflow bores forming identical acute angles with a reference plane which is normal to the cylinder axis.

2. In the internal combustion engine according to claim 1, wherein the auxiliary combustion chamber is designed as an antechamber.

3. In the internal combustion engine according to claim 1, wherein the main combustion chamber is designed as a turbulence chamber.