Delayed-Charging and Low-Pressure Fuel Injection: a Step towards less Consumption and less Pollution in Small Two-Stroke Engines L.M.P./« Pierre et Marie Curie », Paris University

Format:

Book

Conference/Event

Author/Creator:

Rochelle, P., author.

Conference Name:

Small Engine Technology Conference & Exposition (1997-10-27 : Yokohama, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Tokyo, JAPAN Society of Automotive Engineers of Japan 1997

Summary:

The classical two-stroke engine is well known for its mechanical simplicity, its high power-to-weight ratio but also, unfortunately, for its poor fuel utilization effectiveness due to large losses of fuel during scavenging leading to a high specific consumption and a high hydrocarbon pollution rate. A very simple system, called Delayed-Charging (D.-C.), was proposed in earlier papers, improving fuel utilization by separating the scavenging and charging functions, the latter being retarded. In this paper, comparisons are made between a 50 cc production engine and D.-C. modified 50 cc engines equipped with a pressurized carburetter or a low-pressure injector feeding the air flow into the charging-transfer duct (id est various engines including parameter changes such as injector location, fuel jet angle, jet direction, injection closing angle, D.C.-transfer duct geometry, number of scavenging transfer ducts,). With electronic fuel injection, one notices a further marked reduction in fuel-consumption and HC pollution, with figures down to respectively 310 and 36 g/kWh, associated with low CO production, which is at the expense of the slightly lower bornm.e.p.

Notes:

Vendor supplied data

Publisher Number:

978453

Access Restriction:

Restricted for use by site license