<div class="htmlview paragraph">A methanol fueled, lean burn system has been developed to improve both specific fuel consumption and NOx emissions.</div> <div class="htmlview paragraph">A 1.6L four-cylinder engine with increased compression ratio has been used to develop this system. Three major components of the Toyota Lean Combustion System (T-LCS) have been applied: <ol class="list nostyle"> <li class="list-item"><span class="li-label">(1)</span> <div class="htmlview paragraph">A helical port with a swirl control valve</div></li> <li class="list-item"><span class="li-label">(2)</span> <div class="htmlview paragraph">A lean mixture sensor</div></li> <li class="list-item"><span class="li-label">(3)</span> <div class="htmlview paragraph">Timed, multi-point fuel injection.</div></li> </ol></div> <div class="htmlview paragraph">A 2250 lb. Inertia Weight test vehicle has been fitted with this engine, and fuel system materials have been modified.</div> <div class="htmlview paragraph">This methanol, lean burn system has improved the fuel economy by about 12% still satisfying the 1986 emission standards of the U.S.A. and Japan. Aldehyde emissions have also been evaluated.</div>