Browse Publications Technical Papers 2007-01-4053
2007-10-29

Improving Ion Current Feedback for HCCI Engine Control 2007-01-4053

In HCCI you do not have the same control of the combustion like in SI and Diesel engines. Controlling the start of a combustion event is a difficult task and requires feedback from previous cycles. This feedback can be retrieved from ion current measurements. By applying a voltage over the spark gap, ions will lead a current and a signal that represents the combustion in the cylinder will be retrieved. Voltages of 450 V were used.
The paper describes a new method to enhance the combustion phasing from the Ion current trace in HCCI engines. The method is using the knowledge of how the signal should look. This is known due to the fact that the shape of the ion current signal is similar from cycle to cycle. This new observation is shown in the paper.
Also the correlation between the ion current and CA50 was studied. Later the signals have been used for combustion feedback.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Closed-Loop Control of an HCCI Engine

2001-01-1031

View Details

TECHNICAL PAPER

HCCI Combustion Phasing in a Multi Cylinder Engine Using Variable Compression Ratio

2002-01-2858

View Details

TECHNICAL PAPER

HCCI Combustion Phasing with Closed-Loop Combustion Control Using Variable Compression Ratio in a Multi Cylinder Engine

2003-01-1830

View Details

X