RU2379640C1 - Device for control of diesel load - Google Patents

Abstract

FIELD: measurement equipment.

SUBSTANCE: invention is related to measurement equipment and in particular to devices for control of diesel load. Device for control of diesel load comprises primary converter, connector cable, converter of signals with integrator, indicator pointer and source of supply. As primary converter, tracking device is used, as well as inductance motion sensor inbuilt into body of rotation frequency controller corrector. Steel core of sensor is permanently pressed to lever of corrector. Value of outlet signal of primary converter depends on inductance of electromagnet coil of sensor, which is defined by value of core immersion in coil in process of action at corrector lever core, which corresponds to value of diesel load. This signal is sent to converter of signals, where it is converted into readings of indicator pointer. Availability of integrator in converter of signals provides for stabilisation of outlet signals of primary converter in case of short-term oscillations of corrector lever.

EFFECT: continuous control of diesel load in the whole range of operation of centrifugal controller of rotation frequency.

2 cl, 2 dwg

Description

The invention relates to measuring equipment and, in particular, to devices for monitoring the loading of a diesel engine when choosing economical operating modes.

A known device for monitoring the loading of a diesel engine [1], comprising a sensor, an electronic logic unit and a light indicator.

The sensor is an open contact pair formed by an adjusting screw and a lever shaft of a centrifugal speed controller (RFV). When the diesel engine reaches its maximum load, the contact pair closes, the electrical signal from the sensor enters the logic unit, where it is converted into the readings of a light indicator informing the driver about the need to switch to a more economical mode of operation.

The disadvantages of this device are: a narrow range of diesel loading control due to the sensor triggering only at maximum load mode at the time of the diesel engine switching from regulatory to the corrector branch of the speed characteristic; the need for periodic cleaning of the contact pair elements from deposits of wear products contained in the crankcase oil of centrifugal RFV; low reliability of contact pair operation, since it works in an oil-air environment; low stability of the output signals from the sensor during short-term oscillations of the arm shaft of the RF.

A known device for monitoring the loading of a diesel engine [2], comprising a sensor, an electronic logic unit with a single-chip microcomputer, and a light indicator.

The sensor is a contact pair formed by an adjusting screw and a lever shaft of a centrifugal RFV. The presence of a single-chip microcomputer in the electronic unit allows more precise control of the maximum diesel load mode.

The disadvantages of this device are: a narrow range of control of the diesel load due to the sensor triggering only at maximum load mode at the time of the transition of the diesel engine from the regulatory to the corrector branch of the speed characteristic; the need for periodic cleaning of the contact pair elements from deposits of wear products contained in the crankcase oil of centrifugal RFV; low reliability of contact pair operation, since it works in an oil-air environment; low stability of the output signals from the sensor during short-term oscillations of the arm shaft of the RF.

The closest in technical essence to the claimed invention relates to a device for determining the load of a diesel engine [3], comprising a primary converter, a connecting cable, a signal converter consisting of a master oscillator and a buffer stage, an indicator pointer and a power source.

A non-contact couple is used as a primary transducer (sensor), including a centrifugal RFV lever shaft with a permanent magnet mounted in it and an adjustment screw made of a diamagnet, inside which a semiconductor sensitive magnetically controlled element is inserted, which is capable of changing the value of the output signal from the changing magnetic field caused by changing the distance between the lever shaft and the adjusting screw, the value of which is proportional to the degree of diesel loading.

The disadvantages of this device are: a narrow range of diesel loading control due to the sensor triggering within a small range of changes in the distance between the shaft of the centrifugal RFH lever and the adjusting screw; the need for periodic cleaning of the elements of the contactless pair from deposits of wear products contained in the crankcase oil of a centrifugal RFV; low reliability of operation of a contactless pair, since the elements of the pair are separated by an air-oil medium; instability of the output signals with possible fluctuations of the shaft of the lever RFV.

The claimed invention is aimed at eliminating the above drawbacks and the following technical result was obtained from its use: the possibility of continuous monitoring of diesel loading in the entire range of centrifugal RFB operation, depending on load-speed modes; reducing the complexity of servicing the device by eliminating the operation of cleaning deposits of wear products of a contactless pair due to its absence in the claimed device; increasing the reliability of operation of the primary transducer by providing a constant back pressure of the moving elements of the tracking device; increasing the stability of the output signals with possible oscillations of the lever of the centrifugal RFB due to the use of an integrator in the signal converter of the device.

The specified technical result is achieved through the use of a primary converter, consisting of a device that monitors the operation of the diesel engine (the corrector lever of the centrifugal RFB) and simultaneously controls the magnitude of the inductance (output signal) depending on the load of the diesel engine (inductive displacement sensor), and also due to that in the signal converter there is an integrator that provides stabilization of the output signals during short-term oscillations of the RFC corrector lever.

Figure 1 presents a General view of the control device for loading a diesel engine, figure 2 - remote element A.

The diesel loading control device comprises a primary converter 1, a connecting cable 2, a signal converter 3, consisting of a master oscillator 4, a buffer stage 5 and an integrator 15, an indicator pointer 6 and a power source 7, and a follow-up device made in the form of a primary converter 1 is used. in the form of a lever 8 of a centrifugal RFV corrector, and an inductive displacement sensor, consisting of an electromagnetic coil 9 mounted in the body 10 of the corrector, a steel core 11 installed with the axial gap in the axial holes of the electromagnetic coil 9 and the corrector rod 12 with the possibility of changing the inductance of the electromagnetic coil 9 when the core 11 is moved by the corrector lever 8 depending on the diesel load, while the upper end of the core 11 is rigidly connected to a non-metallic movable rod 13 loaded with a spring 14, to ensure constant contact of the lower end of the core 11 with the lever 8 of the corrector. The signal Converter 3 further includes an integrator 15, which provides stabilization of the output signals of the primary Converter 1 with short-term oscillations of the lever 8 of the corrector with the possibility of adjusting the response time.

The control device for loading a diesel engine operates as follows.

Depending on the diesel engine’s loading mode (idle mode, mode of small and medium loads, nominal load mode, overload mode), the fuel control lever is set to the appropriate position (in the range from minimum to maximum fuel supply), provides the required speed mode for a certain the load is a centrifugal RFB, the loads (or spring) of which move the dispenser of the high-pressure fuel pump towards increasing or decreasing the fuel supply. At the same time, the corrector lever 8 is moved up or down, and, consequently, the core 11 is moved accordingly, which, in turn, leads to a change in the inductance of the electromagnetic coil 9 (to a change in the output signals of the primary converter 1). The generated electrical signal via cable 2 enters the signal converter 3, where it is converted into indications (percent load in terms of torque) of the indicator pointer 6.

The master oscillator 4 of the converter 3 generates electrical pulses of a given frequency, which are fed to the inputs of the buffer cascade 5. The buffer cascade 5 provides isolation of the master oscillator 4 and the inductive displacement sensor, and the integrator 15 provides stabilization of the output signals of the primary transducer 1, the response time of which is controlled by a change in the capacitance of the capacitor .

Information sources

1. Pat. RU 2029932, class G01L 5/00, G01L 23/22. Econometrician / V.A. Rodichev, M.P. Bourdian. - No. 4932555/10; Claim 04/29/91; Publ. 02/27/95; Bull. No. 6.

2. Pat. RU 2030723, class G01L 23/22. Engine load signaling device / P.A. Amelchenko, M.P. Burdian, M.Sh. Klebanov, V.A. Rodichev, V.I. Romanovsky, A.I. Yakubovich, S.D. Yarosh. - No. 5066742/10; Claim 06/03/92; Publ. 03/10/95; Bull. Number 7.

3. Pat. RU 2198388, cl. G01L 23/08. A device for determining the loading of a diesel engine / N.I. Zubov, S.V. Sviridov, I.I. - No. 2001102129/06; Claim 01/23/01; Publ. 02/10/03; Bull. Number 4.

Claims (2)

1. A control device for loading a diesel engine comprising a primary converter, a connecting cable, a signal converter, consisting of a master oscillator, a buffer stage and an integrator, an indicator pointer and a power source, characterized in that the primary device uses a tracking device made in the form of a corrector lever a centrifugal speed controller, and an inductive displacement sensor, consisting of an electromagnetic coil mounted in the body of the corrector, a steel heart a core installed with a radial clearance in the axial holes of the coil and the corrector rod with the possibility of changing the inductance of the coil when moving the core under the action of the corrector lever depending on the diesel load, while the upper end of the core is rigidly connected to a movable nonmetallic rod loaded with a spring, providing constant contact of the lower end of the core with the corrector lever. 2. The diesel control device according to claim 1, characterized in that the signal converter further includes an integrator, which provides stabilization of the output signals of the primary converter with short-term oscillations of the corrector lever with the possibility of adjusting the response time.

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