Abstract:
The invention relates to an rpm governor of a fuel injection pump for internal combustion engines, in which a positive or negative adaptation is attainable by way of a hydraulically actuated piston. The fluid pressure determining the piston position is variable by means of a valve in an outflow conduit from the control pressure chamber.
Abstract:
A fuel injection pump, the volume adjustment member of which has a limiter of its play in the form of an adjustable device, which is movable in accordance with the displacement of a control piston in response to a contour provided in the control piston. The displacement of the first control piston occurs in accordance with the pressure of the air supplied to the combustion chambers of the internal combustion engine, and this in turn is controlled with the aid of a pressure element. The pressure element actuates a control piston, with the aid of which a control pressure is created which actuates the first control piston. The control pressure, at the same time, acts on the pressure element by way of the second control piston in the form of return pressure. In a state of equilibrium the control pressure circuit is separated from the pressure source.
Abstract:
A two speed governor for a fuel pumping apparatus which supplies fuel to an internal combustion engine comprises a source of fuel under pressure which varies in accordance with the speed of the engine. Fuel is supplied through a first orifice and a second orifice in series from the source. The second orifice is defined by a port the size of which is controlled by a manually operable rod while the first orifice is defined by a port the size of which is controlled by a spool responsive to the pressure of the source. The port closes at the maximum allowed engine speed. A third orifice defined by a port is also controlled by the spool and is connected in parallel with the second orifice. The port is closed at speeds above the idling speed of the engine. In the intermediate speed range the engine is controlled by the rod.
Abstract:
An internal combustion engine overspeed protection system utilizes a spring-actuated expandable overspeed link in the fuel control linkage to shut off fuel independently of governor or throttle action. The link is normally latched in a contracted condition and positioned in the fuel linkage between a manual fuel lever and the fuel cranks for the respective cylinders of the engine. An automatically resetable hydraulic actuating device unlatches the link in high speed response to an engine overspeed condition. A spring coupling in the fuel linkage permits relatching of the overspeed link by manipulation of the fuel lever.
Abstract:
A fuel injection pump for an internal combustion engine including a low pressure sump and a sump piston, reciprocating in a cylinder, for imparting elevated pressure to the fuel for delivery to injection valves. The pressure chamber in the pump cylinder can be opened to the sump at some adjustable point of the piston stroke to limit fuel delivery. A secondary conduit between the pressure chamber and the sump includes a flow throttle that variably restricts the return flow of fuel as adjusted by fluid pressure which is regulated by a secondary fuel control mechanism. This mechanism is subject to closed-loop control via an air flow rate meter disposed in the induction tube and also acts as a limiting stop for the baffle plate of the air flow rate meter.
Abstract:
An electronically controlled, hydraulically actuated precision governor controls the operating RPM of an internal combustion engine by repositioning the engine throttle in response to changes in engine RPM. The piston of a hydraulic actuator is coupled to the throttle. The flow of hydraulic fluid to the actuator is controlled by a specially designed hydraulic valve which includes a piston the displacement of which is regulated by controlling the pressure in a pressurized control chamber. The fluid pressure in the pressurized control chamber is regulated by a pair of electronically controlled fuel injector nozzles. The electronic circuitry which controls the two electronic fuel injector nozzles receives electronic inputs corresponding to the operating RPM of the engine, the desired engine operating RPM and engine throttle position.
Abstract:
A fuel injection pumping apparatus includes an injection pump having a fuel quantity control rod, the setting of which is determined by a governor mechanism; the governor mechanism includes a first pivotal link which is moved by a servo-mechanism controlled by means responsive to the speed of the associated engine; the servo-mechanism effects movement of the link about a first pivot axis; a second link is pivotally connected to the first link, and movable pivot means is disposed in a slot formed in the second link; the second link is connected to the control rod and operator adjustable means is provided for moving the pivot means to adjust the amount of fuel supplied to the engine.
Abstract:
A hydraulic servo-motor for the control of an internal combustion engine which is equipped with a servo-piston, with a fuel quantity control mechanism and with a control slide valve member arranged coaxially to the servo-piston which itself is in operative connection with a centrifugal governor; a working medium under pressure is supplied by a pump driven directly or indirectly by the internal combustion engine; an auxiliary piston arranged coaxially to the servo-piston and to the control slide valve member is acted upon by the pressure of the working medium and permits in case of an existing pressure of the working medium, a stroke of the control slide valve member in one direction which is limited by the servo-piston and a stroke of the control piston in the other direction which is limited by the auxiliary piston; a spring supported at the servo-piston acts on the auxiliary piston opposite the pressure of the working medium and clamps together the control slide valve member and the servo-piston in case of absence of pressure in the working medium.