RU2578754C1 - Device for monitoring oil in internal combustion engine - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to devices for measuring level and quality of oil in internal combustion engines (ICE). Device for monitoring oil in the internal combustion engine, comprising a cap mounted on the discharge tube, the body with spring-loaded cover and antenna sensors oil switching unit, the contact elements are fixed in the center of the partition body, the radio is installed with its own battery within the housing and connected to the supply circuit through a contact spring to start monitoring when enabling power of the engine, radio located in the vehicle cab and is connected by its output to inputs of the buzzer and the block indicating visual information, characterized in that the housing via flanged inserts contains oil level and condition sensors, respectively inductive and capacitive types, in which as induction coil plastic tube with wound wires is used, two inserted into each other plastic tubes are used as capacitive electrodes in which the mating surfaces are wrapped with metal foil, the bottom portion of the induction coil is a LED near which there is fixed photocell inside the coil and between electrode there is engine oil supplied through the channels of cover flange inserts and housings.

EFFECT: invention enhances parameters of engine oil quality control and increase their accuracy.

1 cl, 1 dwg

Description

The invention relates to internal combustion engines, in particular to a lubrication system for internal combustion engines, and is aimed at monitoring the state of oil in it.

A known device for monitoring the state of oil in an internal combustion engine, in a control system in which oil quality is continuously monitored for the residual life, taking into account the number of revolutions that the engine has made since the last oil change, the smell of the oil and the oil’s operating time. The sensor signals are processed by the electronic system and displays a signal about the need to change the oil (US patent No. 5382942, CL F01M 11/10, publ. 1995).

A disadvantage of the known device is that it does not provide control of the oil state of the internal combustion engine with measuring the oil level and engine running hours, with adjusting the oil level values by the oil quality value, in addition, it does not provide calculation and display information deviation of the oil quality value relative to the current normalized value of oil quality, the value of oil consumption, which reduces the ability to control the state of oil in an internal combustion engine.

A known system for monitoring the quality of oil in an internal combustion engine, described in the oil level and oil quality sensor, adopted as a prototype, containing an oil level and oil quality sensor, which consists of two cylindrical parts inserted one into the other, forming a capacitor (capacitive sensors), an oil temperature sensor and an electronic unit (corrector), and the level, quality and temperature sensors are connected to the electronic unit (corrector) and have the ability to contact with engine oil. (Olwechselnurbei Bedarf // AMZ: Auto, Mot, Zubehor, - 1997. - 85, No. 9. - C 123).

A disadvantage of the known system is that the error in reading the oil level largely depends on the change in the conductivity of the oil, which changes during the use of the oil.

Known on-board device for monitoring engine oil pollution, containing a capacitive sensor with coaxially arranged cylinders, an operating frequency RC generator, a capacitive sensor installed in a regular technological hole in the engine housing, a reference frequency RC generator, a frequency subtraction unit, a pulse generating unit, a frequency conversion unit in voltage, the output of the capacitive sensor is connected to the input of the RC-generator of the operating frequency, the outputs of the RC-generator of the working frequency and the RC-generator of the reference frequency are connected respectively but with the first and second input of the frequency subtraction unit, the output of which is connected to the input of the pulse shaping unit, the output of which is connected to the frequency to voltage conversion unit and to the input of a standard computer, an analog adder, a voltage reference block, a four-channel comparator, an indication block, a conversion block output frequency to voltage is connected to the first input of the analog adder, to the second input of which the output of the standard temperature sensor is connected, the output of the analog adder is connected to the inverse inputs of four channel comparator, the outputs from the reference voltage block are connected to the direct inputs of the comparator, the outputs of the four-channel comparator are connected to the corresponding inputs of the display unit, the voltage regulator is 5 V, the input of which is connected to the on-board network, and the output is connected to the supply circuits of devices (Patent No. 40469, class . G01D 21/00, publ. 09/10/2004).

A disadvantage of the known device is that it does not provide a determination of the oil level, and also has an error in the indication of oil quality, because it does not take into account the contamination of the oil during use.

The technical result of the invention is to expand the parameters of oil quality control in an internal combustion engine, oil level and its contamination, improving the accuracy of readings. The use of the device does not imply a change in engine design.

The specified technical result is achieved by the fact that in the device for monitoring oil in the internal combustion engine the oil level is read using an induction sensor, the oil quality is a capacitive sensor, and the dirt is detected by a photo sensor, which, with a battery, amplification and data transmission unit, are located in the device’s body, inserted instead of a drain plug crankcase engine. The measured values from the sensors in sequential polling order are sent to the amplifier and transmitter, which transmits sequentially, and the receiver located in the vehicle interior receives data, analyzes and displays on the information display. In case of deviation of the parameters of availability and quality of oil, the receiver displays recommendations on the display and gives a sound signal.

In the drawing of FIG. 1 shows a device for controlling oil in an internal combustion engine. The device for monitoring the state of oil in an internal combustion engine contains a cap 2 with an antenna 14 mounted on a drain plug, a housing 1 with a spring-loaded cover 9, oil sensors with a switching unit 13, the contact elements of which are fixed in the center of the partition wall of the housing 1, a radio transmitter 5 installed together with self-contained battery 3 inside the housing 1 and connected to it by a supply circuit through a contact spring 4 with the ability to start when the engine is powered on, a radio located in the trans tailor means and connected by the output to the inputs of the sound signaling device and the block for issuing visual information. Sensors of level 8 and state 11 of oil, respectively, of induction and capacitive types, in which a plastic tube with a wire winding is used as an induction coil, and two plastic tubes inserted into each other, are used as capacitive electrodes into the housing 1 through flange inserts 10, 12; in which the mating surfaces are wrapped in metal foil. In the lower part of the induction coil there is an LED 6, next to which a photocell 7 is fixed. Inside the coil and between the electrodes there is motor oil coming through the channels of the cover 9, flange inserts 10, 12 and the housing 1.

The device operates as follows. The measured current from the sensors 8, 11 and the photocell 7 through the switching unit 13, mounted in the center of the partition wall of the housing 1 is supplied to the radio transmitter 5, configured to emit a code message in the form of a sequence of pulses of a given interval, while the housing has a dielectric coating, and output through the housing and the coating antenna 14 is a metal disk fixed with a spring latch on the cap 2. The element that feeds the radio transmitter is located in the housing 1 with a cap. The sleeve and its diametrical rod are made of metal. Autonomous battery 3 negative pole adjacent to the housing and the cover. The negative power terminal of the radio transmitter is connected by a conductor to the first contact element of the switching unit 13, and the positive power terminal by means of a metal coil spring 4 is connected to the positive pole of the battery. The radio receiver is configured to determine the parameters of the code sending of the radio transmitter and output data of the level, oil quality and its contamination to the visual information output unit. If the oil level is equal to the limit, an alarm is given and warning information is displayed on the display screen. Oil quality and contamination parameters are displayed on the screen with the corresponding recommendations.

The measured parameters of the induction sensor 8 depend on the filling of the internal volume of the core with oil.

The capacitive sensor 11 operates on the principle of measuring the dielectric constant of the oil between the capacitive electrodes. This sensor determines the quality of the oil, the presence of water or fuel, an alkaline or hydrogen indicator, as well as their combination.

Sensor 7 LED photocell detects oil contamination by the presence of soluble or insoluble particles.

Thus, the proposed system for monitoring the state of oil in an internal combustion engine allows controlling the internal combustion engine with measuring the level, quality, oil temperature and operating hours of the internal combustion engine, adjusting the oil quality value by temperature and the level of oil consumption for a given time interval, flow rate deviations oil relative to the normalized oil consumption, deviations of the oil quality relative to the current value of the normalized oil quality, total the course of the oil for a given period of time by displaying on the display: values of quality, quantity, consumption, deviation of oil consumption relative to normalized oil consumption, deviation of oil quality relative to the current normalized value of oil quality, total oil consumption, as well as informing about unacceptable quality deterioration oil, reducing the amount of oil and a sharp deterioration in the quality of the oil.

Claims (1)

Device for oil control in ICE, containing a cap mounted on a drain plug, a housing with a spring-loaded cover and an antenna, oil sensors with a switching unit, the contact elements of which are fixed in the center of the partition wall of the housing, a radio transmitter installed together with an autonomous battery inside the housing and connected to a power supply circuit through a contact spring with the ability to start when the engine is powered on, a radio receiver located in the vehicle cabin and connected by an output to odes of an audible warning device and a visual information output unit, characterized in that the oil level and state sensors of the induction and capacitive types, respectively, are used in the housing through flange inserts, in which a plastic tube with a wire winding is used as an induction coil, and two capacitive electrodes are used plastic tubes inserted into each other, in which the mating surfaces are wrapped with metal foil, an LED is located at the bottom of the induction coil , next to which the photocell is fixed, inside the coil and between the electrodes there is engine oil coming through the channels of the cover, flange inserts and the housing.