초록 ▼

A air/fuel ratio regulator for control of the movement of a fuel flow control lever on a fuel injection pump. A lever is connected to the pump lever and moved by an aneroid to change the pump fuel flow as a function of engine manifold vacuum changes to maintain a constant air/fuel ratio to the mixtu

A air/fuel ratio regulator for control of the movement of a fuel flow control lever on a fuel injection pump. A lever is connected to the pump lever and moved by an aneroid to change the pump fuel flow as a function of engine manifold vacuum changes to maintain a constant air/fuel ratio to the mixture charge. A fuel enrichment lever moves to modify the movement of the fuel control lever to compensate for changes in intake manifold gas temperature as sensed by a coil thermostat, to maintain the constant air/fuel ratio. A fuel enrichment shaft having a piston is connected to the enrichment lever and to a number of spaced, interconnected but relatively movable pistons, and that are adjustable to change the position of the enrichment lever and therefore the air/fuel ratio as a function of exhaust gas recirculation back into the engine, and operating the engine at cruising conditions for an extended period, or operating the engine at idle speed, all with leaner air/fuel ratios. An infinite number of different air/fuel ratios can be established.

대표청구항 ▼

An air/fuel ratio regulator for use with the fuel injection control system of an internal combustion engine of the spark ignition type having an air and exhaust gas (gas) induction passage open at one end to air at ambient pressure level and connected at its other end to the engine combustion chambe

An air/fuel ratio regulator for use with the fuel injection control system of an internal combustion engine of the spark ignition type having an air and exhaust gas (gas) induction passage open at one end to air at ambient pressure level and connected at its other end to the engine combustion chamber to be subject to manifold vacuum changes therein, a throttle valve rotatably mounted for movement across the passage to control the gas flow therethrough, exhaust gas recirculation (EGR) passage means connecting engine exhaust gases to the induction passage above the closed position of the throttle valve, an EGR flow control valve mounted in the EGR passage means for movement between open and closed positions to control the volume of EGR gas flow, an engine speed responsive positive displacement type fuel injection pump having a fuel flow output to the engine that varies in direct proportion to changes in engine speed to match fuel flow and mass air flow through the induction system of the engine over the entire speed and load range of the engine to maintain the intake mixture ratio of air to fuel constant, the pump having a fuel flow control lever movable to vary the fuel rate of flow, the regulator being characterized by engine manifold vacuum responsive first servo means operably connected to the fuel control lever for maintaining a constant air/fuel (A/F) ratio by changing fuel flow output as a function of changing manifold vacuum and air flow upon opening of the throttle valve, a fuel enrichment control lever operably connected to the pump control lever and movable to modify the position of the pump lever dictated by the first servo means to change the A/F ratio, and further means responsive to engine operating conditions for moving the fuel enrichment control lever to provide the changed A/F ratio, the further means including a second manifold vacuum responsive servo means for moving the enrichment lever in a fuel flow decreasing direction, spring means biasing the enrichment lever in a fuel flow increasing direction for maximum enrichment and richest A/F ratio upon decay of manifold vacuum during maximum engine acceleration, and variably adjustable stop means in the path of movement of the enrichment lever in a fuel flow decreasing, leaning A/F ratio direction to vary the A/F ratio upon adjustment of the stop means, the variable stop means including a plurality of inline interconnected fluid actuated pistons relatively movable with respect to each other for varying the linear distance between pistons.