PHILIPPINE TRICYCLE RETROFIT PROGRAM PRELIMINARY FIELD TESTS RESULTS
December 2005
EXECUTIVE SUMMARY
Beginning in early 2005, Envirofit International in
conjunction with the Foundation for a Sustainable Society
(FSSI) and Don Bosco Center for Research and Training
(DBCRT) undertook a program to field test a direct injection
retrofit kit for two-stroke motorcycles. This field test ran from
May through November and encompassed 13 Kawasaki HDIII
tricycle units in three Philippines locations. This document
provides a portion of the preliminary data that was gathered.
Processing of the final data is underway and a full field test
report will be available at www.envirofit.org
or by request at info@envirofit.org
in January 2006.
The retrofit kits implemented during the field test incorporated direct injection (DI) technology. Conventional carbureted two-stoke engines lose ~35% of their fuel directly to the exhaust due to the scavenging process of a two-stoke engine. Direct injection is a process that separates fuel delivery from the scavenging process, virtually eliminating fuel lost to the exhaust. Due to this elimination of lost fuel as well as more complete combustion, hydrocarbon (HC) and carbon monoxide (CO) emissions are greatly reduced. At the same time fuel efficiency is increased.
To quantify the improvements seen due to the DI retrofit kit, data was collected throughout the field test both in the laboratory and in the field. This data showed that over the ~55,000 km driven during the field test, the DI retrofit kits reduced hydrocarbon emissions by 88%, carbon monoxide emissions by 74%, while at the same time increasing fuel efficiency 30%. Idle testing showed that the DI retrofit kit was 89% below the Philippine Department of Natural Resources (DENR’s) proposed hydrocarbon emission regulation and 97% below the proposed carbon monoxide regulation.
