RU2108468C1 - Vehicle engine unit oil heating device - Google Patents

Abstract

FIELD: mechanical engineering; prestarting heating of oil in engine unit crankcase. SUBSTANCE: electric heating members of device are made in form of separate flexible rods with wire spirals wound on lower portions of rods. Wire spirals made, for instance, of NiCr are enclosed in dielectric heat resistant shell and are arranged in oil level check hole or oil filler hole. Each electric heating member in its upper portion is connected through incandescent lamp to positive terminal of power supply source, and in its lower portion, through end piece and bottom of engine unit crankcases, to negative terminal of power source. EFFECT: reduced time taken for preparation of engine unit for starting at below zero temperatures, reduced overall dimensions, provision of multi- purpose construction. 3 dwg

Description

 The invention relates to mechanical engineering, namely, transport mechanical engineering, in particular to the operation of the machine and tractor fleet in winter conditions, and can be used for prestarting heating of oil in the crankcase of a power plant.

 A device for heating oil, for example, in the oil pan of an internal combustion engine during winter operation, comprising a housing with pushers, a pressure washer and a nut installed in the oil drain plug of the oil pan, and an electric heater, which is made in the form of several flat electric heating elements pivotally interconnected with the possibility of disclosure in the form of a fan in the working position.

 This electric heating device has the following disadvantages. Firstly, its installation requires significant preparatory time, which consists of the time to drain the oil from the crankcase of the internal combustion engine, since the electric heating device is installed instead of the drain plug, as well as to screw in the device itself and fill the oil after installing the device. Secondly, after warming up the oil and immediately before starting the engine, additional time is required to remove the device from the crankcase, since otherwise it may touch the fan of the electric heating elements over the rotating engine parts, which can lead to failure of the latter and it is impossible to control due to the lack of visual control over the operation and placement of electric heating elements in the crankcase of an internal combustion engine. Thirdly, the rigid design of the device for heating oil and installing the device in the bottom of the crankcase, the low location of the crankshaft in relation to the pallet and a two-wire energy supply circuit limit the area of electric heating elements, which ultimately increases the time for heating the oil.

 The objective of the invention is to reduce the time required to prepare a vehicle’s power plant for start-up in winter operating conditions with a compact and versatile design.

 The solution of this problem is achieved by the fact that in the proposed device, the electric heating elements are made in the form of separate flexible rods with wire spirals wound on them in the lower part, for example of nichrome, which are enclosed in a dielectric heat-resistant shell and are located in the hole for monitoring the oil level or for it fill, with each of the electric heating elements in the upper part connected through an incandescent lamp to the positive terminal of the electric power source, and in the lower part through tip and the bottom of the casing of the power plant - to a negative terminal of the source.

 Comparative analysis with the prototype allows us to conclude that the claimed device is characterized in that the electric heating elements are made in the form of separate flexible rods equipped with an incandescent lamp and connected to a power source in a single-wire circuit and are located in the hole for monitoring the oil level or for filling it.

 In FIG. 1 shows a General diagram of the proposed device, the working position; in FIG. 2 - electric heating element, general view; in FIG. 3 is an oscillogram of the current strength when the electric heating element is turned on.

 The device for heating the oil consists of separate electric heating elements 1, made in the form of flexible rods 4 and containing a spiral 5 of nichrome wire, one of the ends of which is connected to the tip 6, and the other through an incandescent lamp 7 - with a positive output of the electric power source. To exclude the closure of the turns of the spiral 5 to each other, the latter are protected by a layer of fluoroplastic 8.

 A device for heating oil is brought into operation as follows. Electric heating elements 1 are alternately installed in the hole 2 for monitoring the oil level or for filling until the tip 6 touches the bottom 3 of the power unit housing. In this case, in the circuit of the electric heating element 1 due to a change in the resistance of the filament of the incandescent lamp 7, a short-term increase (surge) in the current strength occurs (Fig. 3), which ensures a breakdown of the oil film between the tip 6 of the electric heating element 1 and the bottom 3 of the power unit housing. The incandescent lamp 7 in this device is both an indicator of the operation of the electric heating element 1 and the current barreter, and the flexible design of the electric heating elements 1 allows the driver to rationally place them in the crankcase of the power plant.

 The device operates as follows.

 The electric current flows as follows: from the positive output of the electric power source through the incandescent lamp 7, along the turns of the spiral 5 through the tip 6, the bottom of the crankcase of the power unit 3 to the negative output of the power source. Due to the voltage drop across the ohmic resistance of the spiral 5, the latter heats up and transfers heat through the fluoroplastic layer 8 to the oil in the oil pan of the power plant. Under the influence of convective flows arising from the temperature difference, mixing of warm and cold oil begins, as a result of which the average oil temperature in the oil pan of the power plant will increase. Heating stops after reaching a temperature that ensures reliable engine start.

 Thus, the time to prepare the power plant for start-up in winter operating conditions is reduced, firstly, due to the upper input of electric heating elements, for example, into the hole for monitoring the oil level instead of the oil dipstick, while the time is additionally spent only on removing the dipstick that the driver does daily before leaving the car on a flight. This reduces the preparatory and additional time, respectively, for the installation and removal of electric heating elements, secondly, the input of electric heating elements from above, a single-wire circuit for supplying electricity to them and the execution of electric heating elements in the form of flexible rods allows, in comparison with the prototype, to increase several times the area heating and thereby reduce the time for heating the oil.

Claims (1)

 A device for heating the oil of a vehicle’s power plant when operating it in cold weather, containing an electric heater in the form of several electric heating elements, characterized in that the electric heating elements are made in the form of separate flexible rods with wire spirals wound on them in the lower part, for example, of nichrome which are enclosed in a dielectric heat-resistant shell and are located in the hole to control the oil level or to fill it, with each of the electro agrevatelnyh elements in the upper part is connected through the lamp filament to the positive terminal of the power source, and at the bottom through the heating element tip and a bottom housing of the power plant - to a negative terminal of the source.

Images