JOHN J MOSKWA
Engineering in Madison, WI

6708557, Mar 23, 2004

Feb 13, 2002

10/075013

John J. Moskwa - Madison WI
John L. Lahti - Marquette MI

Wisconsin Alumni Research Foundation - Madison WI

G01M 1500

73116

A dynamometer is coupled to a single cylinder version of a multi-cylinder engine. The dynamometer control system calculates the instantaneous dynamic torques (e. g. , inertial, combustion, and/or other torques) that would normally be generated in the multi-cylinder engine. The control system then inputs the torque from the missing cylinders of the engine to the dynamometer, preferably by a hydraulic system capable of accurately applying these torque pulses. By inputting energy to the engine as well as receiving it, the single-cylinder engine can replicate the rapid transients that are experienced in multi-cylinder engine operation, and can therefore be made to have an instantaneous speed profile matching that of the multi-cylinder engine. This allows testing of the single-cylinder engine at all engine speeds (including very low speed operation, which has traditionally been problematic), and also allows transient speed and load testing on single-cylinder engines, where such testing has heretofore been infeasible. The dynamometer thereby expands use of simpler, more versatile, and less expensive single cylinder test engines in place of multi-cylinder test engines, thereby decreasing the time and cost of engine research efforts.

6212945, Apr 10, 2001

Dec 5, 1997

8/986258

John J. Moskwa - Madison WI

Wisconsin Alumni Research Foundation - Madison WI

G01M 1500

731173

Disclosed is a method and apparatus for generating a synthetic measure of combustion quality which is particularly useful in diagnosing and controlling combustion quality in internal combustion engines. The synthetic measures, which may be generated utilizing an engine's actual speed or acceleration as an input, have the important qualities that they (1) accurately reflect the engine's actual combustion work at all nominal engine speeds, and (2) retain essentially the same characteristics (e. g. , waveform shape) at all nominal engine speeds. These qualities significantly simplify combustion diagnosis and control. The synthetic measures for the overall engine may be resolved into the contributions from each individual cylinder in the engine if diagnosis and control of combustion quality in the individual cylinders is desired.

7124021, Oct 17, 2006

Feb 23, 2005

11/063923

John J. Moskwa - Madison WI, US
John L. Lahti - Marquette MI, US
Matthew W. Snyder - Manistee MI, US

Wisconsin Alumni Research Foundation - Madison WI

G01M 15/04

701114, 731171

A testing device allows a test engine (such as a single-cylinder test engine) to experience the air exchange characteristics of a multi-cylinder test engine having a greater number of cylinders. The test engine receives air from an air source (such as the atmosphere) through the interior passage of an air intake adapter, wherein valves on the passage walls separate the interior passage from a negative or positive pressure source. A processor (such as a computer) may actuate the valves to allow air to be pulled from the passage to simulate the effect of air intake into additional virtual cylinders (i. e. , cylinders that would operate in tandem with the cylinder(s) of the test engine if the test engine had a greater number of cylinders), and/or to simulate the effect of forced air induction (i. e. , turbocharging or supercharging).

7506537, Mar 24, 2009

Sep 1, 2006

11/469741

John J. Moskwa - Madison WI, US
Steven J. Klick - Madison WI, US
Brian D. Krosschell - Rochester MN, US
Marcus D. Marty - Neillsville WI, US

Wisconsin Alumni Research Foundation - Madison WI

G01M 15/02

7311468

During operation of a single-cylinder test engine, a computer or other processor runs a simulation of additional “virtual cylinders” operating alongside the single cylinder as if all cylinders, real and virtual, were present in a real multi-cylinder engine. Temperature data from the virtual cylinders is generated, and the real cylinder is jacketed with flow passages which are supplied with heat transfer fluid at temperatures such that the thermal presence of the virtual cylinders adjacent the real cylinder is simulated. As a result of this thermal simulation, the real cylinder is able to more accurately simulate the performance that it would have if it was indeed present in a multi-cylinder engine.

7275426, Oct 2, 2007

Mar 31, 2006

11/278207

John L. Lahti - Marquette MI, US
John J. Moskwa - Madison WI, US

Wisconsin Alumni Research Foundation - Madison WI

G01M 15/00

731181

A control system for an internal combustion engine includes a virtual engine model which mathematically represents the states of the engine in real time, but which is programmed to provide the engine's states at least a fraction of an engine cycle (and preferably at least one-fourth of an engine cycle, i. e. , one stroke) to several engine cycles in advance of the real engine. The mass flow entering and leaving the cylinder is modeled, allowing parameters such as the mass of air per cylinder (MAC) and residual exhaust gas to be computed, and thereafter used to generate engine control commands related to fuel injection (air/fuel ratio), spark advance, and so forth.