1966-02-01

Diesel Combustion at High MEP with Low Compression Ratio 660343

Very high mean effective pressures can be obtained from the diesel engine with limited maximum cylinder pressures by using a large clearance volume, that is, a low compression ratio, at high loads. The resultant low compression temperature is an added advantage as far as power production is concerned, but gives rise to excessive ignition delay and hence uncontrolled combustion.
This problem was studied in a single-cylinder four-stroke engine. Various methods of controlling combustion rate were found. The best combination of factors resulted in exceptionally smooth combustion and quiet running at a load of 400 psi bmep, using a compression ratio of 8:1, which gave a maximum pressure of only 1600 psi. Metal temperatures were well within the limits of normal usage. The low percentage heat and friction losses resulted in quite moderate rates of fuel consumption in spite of the low expansion ratio.

SAE MOBILUS

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

Access SAE MOBILUS »

Members save up to 18% 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 for Diesel Combustion Noise Using Engine Vibration Signals

2015-01-2297

View Details

TECHNICAL PAPER

A Full-Cycle Multi-Zone Quasi-Dimensional Direct Injection Diesel Engine Model Based on a Conceptual Model Developed from Imaging Experiments

2017-01-0537

View Details

TECHNICAL PAPER

A Study of the Half Order Modulation Control for Diesel Combustion Noise by Using Model Based Controller Design

2019-01-1416

View Details

X