Abstract:
The regulating device described comprises an element (51) which senses the rotational speed of the injection pump shaft (1) and controls the pump rack (6). The movement of said rack is limited mechanically (61, 62, 63, 64, 65, 67), in a known manner, in function of the position of the accelerator pedal (67). The degree of movement of the rack (6) is therefore proportional to the distance travelled by the accelerator pedal (67). The essence of the invention is a d.c. generator the rotor (2) of which is mounted on the shaft (1) of the injection pump. The stator (4) of the generator is torsionally mounted on the pump against the force of a spring (41) and is linked by a mechanical transmission (43, 45) to a forked stop (46) which prevents further movement. The element (51) which senses the rotational speed of the pump shaft (1) regulates the excitation voltage of the stator (4) by means of a control unit (5).
Abstract:
A fuel control system (10 or 70) includes a hydraulic servo system (17) for moving a fuel rack (15) in response to movement of a rack control member (16). A brushless direct current torque motor (50), having a rotor (51) and a control lever (53) fixed thereto, is arranged with its lever end (54) confined between opposed shoulders (41, 42) on the rack control member (16). Electronically energized movement of the rotor (51) and its control lever (53) in one direction, or spring (56) biased movement in the other, causes corresponding movement of the control member (16) and fuel rack (15). A second control lever (99), movable by a mechanical governor control (80), is engageable with another shoulder (104) on the rack control member (16) to move it in a fuel-decreasing direction. The present fuel control systems (10 and 70) are particularly useful in conjunction with a fuel injection pump (11) for a diesel engine (13) with the fuel flow rate being controlled in sole response (10) to an electronic engine control (60) or in dual response (70) to an electronic engine control (60) and a mechanical governor control (80).
Abstract:
Described is a distributor-type fuel-injection pump with a moving-magnet actuator (15) which operates an actuator element (14) determining the amount of fuel injected. The actuator (15) is controlled by an actuation signal which depends on certain engine-operation parameters. The actuator (15) is mounted in a fuel-filled chamber (16) inside the pump casing (17). To avoid rotary oscillations in the armature (20) of the moving-magnet actuator (15), an oscillation-damping device (25) is provided which comprises a paddle (26) rigidly connected to the armature (20) plus two partition walls (27, 28) located in the chamber (16). The paddle (26) extends radially out from the armature (20) and fills almost the whole free cross-sectional area available in the chamber (16) for the oscillating motion of the paddle. The partition walls (27, 28) separate off the part (161) of the chamber in which the paddle oscillates from the rest (162) of the chamber, but openings permit flow of fuel between the two parts (161, 162) of the chamber.
Abstract:
In einem Kraftstoffsystem (10) einer Brennkraftmaschine wird Kraftstoff von einer Hochdruckpumpe (16) in ein Kraftstoff rail (18) gefördert. Die Menge des geförderten Kraftstoffs wird durch ein von einer elektromagnetischen Betätigungseinrichtung (34) betätigtes Mengensteuerventil (30) beeinflusst. Es wird, dass ein grenzwertiger Haltestrom ermittelt wird, bei dem das Mengensteuerventil noch in seinem geschlossenen Zustand verbleibt oder gerade öffnet.
Abstract:
A fuel injection pump unit consists of a fuel injection pump (1), in which a quantity-determining member (6) is set by an actuator (13), its position being detected by a position sensor (15), and of a control unit (2) which calculates an injection quantity (M) and from that, using a stored ignition characteristic (33), determines a set value ( beta set) for the quantity-determining member (6). To provide a simple and precise calibration of the pump unit with minimal complexity, there are two adjustable stop faces (21, 22) which delimit the travel of the quantity-determining member (6) and in each case define a position of the quantity-determining member ( beta 1, beta 2) commensurate with a certain measured injection quantity (M1, M2), in each case at a certain distance (k1, k2) from their opposite surfaces (23, 24), at least one of them being selected so that contact is not made with the opposite surface (23, 24) unless the quantity-determining member reaches points outside its dynamic adjustment range for injection quantity.
Abstract:
The disclosure relates to a centrifugal governor for a prime mover, preferably an internal combustion engine, with a damping device (4) susceptible to influence the movement of an actuator rod (2), the damping device substantially only acting upon the throttle-up movement of the actuator rod (2), by the intermediary of means (12, 18, 51, 52, 61, 62) included in the damping device. The apparatus according to the invention is intended to prevent the prime mover from racing to dangerously high engine speeds in connection with fuel throttle-back if its load suddenly disappears.
Abstract:
An electronic speed regulating device for a diesel engine includes an oil-regulating element (1) of an injection pump, a pin roll (2), a control module, a motor (3) and its rotating shaft (4), a stem (5) and a speed-regulating lever (7) etc. The regulator omits a mechanical centrifugal speed governor and controls the motor (3) through a load signal by using the control module, and transfers the angular displacement of the motor (3) to the angular displacement of the oil-regulating element (1) of the injection pump by a series of driving devices. Compared with the conventional mechanical centrifugal speed governor, the motion piece of the speed regulator has lighter weight, smaller inertia and more sensitive reaction. The speed-regulating lever (7) adopting certain lever ratio refines the step displacement of the stepping motor (3) and sends it to the oil-regulating element (1) of the injection pump, which can regulate the oil supply quickly and accurately and reduce the fluctuation ratio of the diesel rotary speed.