Abstract:
The control pressure valve assembly for a fuel injection system of an internal combustion engine provides variable fluid pressure which provides a restoring force against the fuel control plunger to alter the fuel-air ratio in dependence on engine and environmental variables. In particular, the fluid pressure is regulated by a spring loaded diaphragm valve which is also subjected to a variable closing force provided by an air pressure cell and by a first temperature sensitive element which opposes the forces of the spring and of the air pressure cell to provide decreased fluid pressure at low engine temperature and a second temperature-sensitive element to oppose the force of the air pressure cell only below a predetermined temperature.
Abstract:
A carburetor has an eccentrically mounted fast idle cam the axis of rotation of which is moved by an engine intake manifold vacuum actuated servo to automatically decrease throttle valve fast idle position as soon as the engine obtains a running condition from a cold engine start.
Abstract:
A carburetor having a main intake passage for a lean mixture and an auxiliary intake passage for a rich mixture is provided with a choke valve in each passage. A control mechanism for operating the two choke valves includes a lost-motion connection so that the main choke valve is at the first to be moved toward closed position, for cold starting of the engine. For colder temperatures, both choke valves are moved toward closed position, and for very cold starting conditions, both choke valves are moved to fully closed position. The control mechanism may be manually operated or it may be automatic under the control of a bimetal element. When the engine on being started reaches a state of complete firing, with stable RPM, both choke valves are opened to predetermined pull-down angles.
Abstract:
The carburetor has a conventional automatic choke construction heating a bimetallic coil by engine exhaust stove heat to slowly open the choke valve during cold weather starts; supplemental heat is provided by an electrically controlled positive temperature coefficient heater device operable above a predetermined ambient temperature to move the choke valve open faster, to reduce emissions.
Abstract:
A mixture-condensing, spark-ignited internal combustion engine includes an intake conduit, a fuel injection device for continuously injecting fuel into the intake conduit, and a measuring device located in the intake conduit and capable of being displaced, against a restoring force biasing the measuring device into a rest position, according to the volume of air flowing through the intake conduit. The measuring device regulates a fuel proportioning valve for adjusting the amount of fuel injected into the intake conduit. A stop, adjustable as a function of engine temperature, is engageable with the measuring device to define the rest position thereof.
Abstract:
An apparatus to prevent after-burning, after the ignition key switch is turned off, in an internal combustion engine which is being warmed up, in which condition the choke valve is closed and the throttle valve is opened to a greater extent than during normal idling. The apparatus includes a pressure responsive actuator which, when activated, causes opening of the choke valve and/or closing of the throttle valve. The actuator is controlled by a switching valve which permits the actuator to be interconnected to either the open air or the air intake manifold at a location downstream of the throttle valve. When the igniton key switch is moved into an off or open position, the switching valve connects the actuator to the intake manifold to thereby actuate the actuator so that one or both of the throttle and control valves are appropriately moved.
Abstract:
Automatic choke valve apparatus for an internal combustion engine in which the degree of opening of a choke valve is selectively controlled by a drive pulse motor drivingly coupled to the valve. A pulse circuit controls the pulse motor, and comprises a pulse generator which oscillates at a fixed frequency and produces an output pulse signal for operating the drive pulse motor, and a variable type flicker coupled to the output of the pulse generator for intermittently controlling the output pulse signal in accordance with engine temperature.
Abstract:
A dual carburetor system employs a main carburetor to supply a lean mixture to the main combustion chambers of an engine and an auxiliary carburetor to supply a rich mixture to the auxiliary combustion chambers of the engine. Each carburetor has a choke valve operated by a thermo-responsive device. Each carburetor has a locking lever which cooperates with an element connected to its choke valve to lock the choke valve in open position. A device responsive to temperature of the engine coolant operates a single member which moves both locking levers to locking position upon increase in temperature of the engine coolant.
Abstract:
A carburetor has a vacuum operated diaphragm type choke control device that acts in connection with a thermostatic control to permit the carburetor choke valve to be closed during starting but provides a controlled gradual opening of the choke valve after starting. An adjustable stop member permits adjustment of the opening by limiting the extent of movement of the diaphragm. The device includes purge feature for continual self-cleaning of the device. A one-way check valve device and precision by-pass means give exact control of the choke opening.
Abstract:
A carburetor has a cold engine fuel enrichment apparatus including a single vacuum servo to progressively first crack open the choke valve a predetermined amount once the engine has attained a running condition, to lean the air/fuel mixture, and then pull the fast idle cam off the high cam step, to decrease the mixture flow to the engine, the apparatus including a slide rail cam connected to the servo and progressively engagable with cam follower surfaces on the choke valve operating linkage and the fast idle cam to accomplish the above-desired functions in an automatic manner.