Ruonan Sun

US Patent:

8055432, Nov 8, 2011

Filed:

Aug 7, 2008

Appl. No.:

12/221825

Inventors:

Ruonan Sun - Ann Arbor MI, US
Xiaoguo Tang - Canton MI, US

Assignee:

The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency - Washington DC

International Classification:

B60T 7/12
G05D 1/00
G06F 7/00
G06F 17/00
F02M 7/00

US Classification:

701103, 123435

Abstract:

A HCCI engine with a model reference adaptive feedback control system maintains stable HCCI combustion during speed/load transitions by: (1) estimating the maximum rate of pressure rise (MRPR), for each cycle, from an extra-cylinder sensor metric, such as a crankshaft dynamics or knock sensor metric, via statistical vector-to-vector correlation; (2) periodically self-tuning the vector-to-vector correlation; (3) applying knowledge base models to guide cycle-to-cycle adjustments of fuel quantity and other engine parameters, to maintain a target MRPR value.

US Patent:

20040237928, Dec 2, 2004

Filed:

May 30, 2003

Appl. No.:

10/448417

Inventors:

Ruonan Sun - Ann Arbor MI, US
Karl Hellman - Ann Arbor MI, US
Charles Gray - Pinckney MI, US

International Classification:

F02B019/02

US Classification:

123/275000, 123/292000

Abstract:

An internal combustion engine is adapted for operation with homogeneous combustion and compression ignition. The engine includes plural cylinders with the piston in each cylinder defining the main combustion chamber and connected to a crankshaft for reciprocating motion rotatably driving the crankshaft. An auxiliary combustion chamber and an inlet passage are formed in the engine head for each of the cylinders with a control valve for controlling communication between the main combustion chamber and the auxiliary combustion chamber and an inlet valve for controlling communication between the main combustion chamber and the inlet passage. The inlet valve is driven with rotation of the crankshaft, while the drive for the combustion control valve is independent of angular position of the crankshaft and has its own controller for timing its opening and closing to provide controlled homogeneous combustion.