초록 ▼

An improved throttle body fuel injection system having a single electrically controlled type of fuel injector in combination with a throttle bypass air circuit to provide favorable fuel preparation at substantially closed-throttle positions such as idle and deceleration while providing good cylinder

An improved throttle body fuel injection system having a single electrically controlled type of fuel injector in combination with a throttle bypass air circuit to provide favorable fuel preparation at substantially closed-throttle positions such as idle and deceleration while providing good cylinder-to-cylinder air/fuel distributions at wide-open-throttle. Fuel is introduced downstream of the throttle at idle and upstream of the throttle at full load.

대표청구항 ▼

Fuel metering apparatus for supplying the air and metered rates of fuel flow to an internal combustion engine comprising: a throttle body means having a main fluid induction passage means for supplying the engine with fuel and air; throttle valve means including a pivotal throttle blade movable betw

Fuel metering apparatus for supplying the air and metered rates of fuel flow to an internal combustion engine comprising: a throttle body means having a main fluid induction passage means for supplying the engine with fuel and air; throttle valve means including a pivotal throttle blade movable between a substantially closed position for idle and a wide open position for high speed engine operation for controlling the flow rate of air and fuel into the engine; the throttle body means forming an interior cavity near the fluid induction passage means; a fuel injection device having an outlet end to the cavity of the throttle body for introducing fuel spray thereto; a first passage means connecting the cavity and the main fluid induction passage means of the housing at a location thereto downstream of the throttle valve means; second passage means connecting the cavity and the main fluid induction passage means of the housing at a location thereto upstream of the throttle valve means; means at the upstream location for producing a lower fluid pressure upstream of throttle valve when moved from its closed position whereby fuel from the cavity is drawn through the second passage means and into the main fluid induction passage means when the throttle valve is moved from a closed operative position.