FR2529957A1 - Diesel fuel filter anti-waxing device - Google Patents

Abstract

The invention relates to appliances of the "diesel fuel filter anti-waxing" type allowing all diesel engines to be started in cold winter weather. It comprises a ring-shaped spacer for a petroleum product 19, an upper opening closed by the diesel fuel filter 20, a lower opening closed by a base 21. The internal element 23, a 12-volt 10-amp heating resistance element, heats the diesel fuel from the tank and the diesel fuel filter to 68 DEG C, controlled thermostatically by the silicon sensor 27 with positive temperature coefficient, associated with an electronic relay control (outside the tank), preventing thermal fluctuations. Among the applications of the invention we mention anti-waxing of Roto-Diesel, Purflux, diesel fuel filters, without main modification to the original filter.

Description

 The present invention relates to devices of the anti-waxing type of diesel filter, allowing the starting of all Dièse engines in cold winter weather.

 your known devices of this kind, are diesel heaters suitable for the piping, the heating part of which is immersed in a box.

 Such devices are difficult to use and lack efficiency: indeed, one cannot do without modifying the piping installation, the heater at a distance far from the filter, defrosts it little or not at all, with thermal variation of temperature.

 The diesel filter anti-waxing according to the invention makes it possible to avoid these drawbacks; it is associated with a crown spacer whose inner part, heating element, is thermostatically controlled by a very high positive coefficient temperature sensor, constituted by a silicon crystal.

 The device according to the invention makes it possible to avoid thermal fluctuations, by electronic control of switching on or cutting off the electronic current of the heating element.

 Another particularity of the present invention consists in stacking the heating crown spacers, an effective means of antiparaffinization of the diesel filters of the engines of public works machines, of the transporters and of the fixed engines.

 The annexed drawing 1/6 is a perspective view of the device.

As shown, the device comprises, according to a first variant, a crown spacer made of iron or steel 1, the upper opening is closed by the filter 2, the lower opening esX closed by a bottom made of iron or steel 3, two orifices in the face of the crown 4, through the shielded heating element two turns for petroleum product 5, sealing by brazing 6, threaded terminals 7, or flat with hole or smooth steel rod. (Only the threaded terminals are shown in drawing 5/6).

TSTY10D temperature sensor 8, mechanical electrical connection of the sensor sensor by non-corrosive tin soldering on lugs 9, fixing by cross of the tank, by threaded rods 10, electrically isolated from the tank by two insulating guns 11, special hydrocarbon seals 12 , electrically insulating washers 13, assembly nuts 14, probe sensor terminals 15, seals 16, 17, 18.

 ne second variant of the device, the attached drawing 2/6 is a perspective view with crown spacer flowing in alpax for petroleum product 19, the upper opening is closed by the filter 20, the lower opening is closed by a bottom cast in alpax for petroleum product 21, two orifices in the face of the crown 22, through, the armored heating element two turns for petroleum product 23, sealing by unitary protected steel plug with nuts and seal 94 board 6/6, brazed waterproof 25, threaded terminals 26, or flat with hole, or smooth steel rod. (Only the threaded terminals are shown on the drawing boards 5/5 k 6/6), temperature sensor mTY1OD, 27, mechanical electrical connection of the sensor, by non-corrosive tin soldering on lugs 28, fixing by crosspiece of the tank in rods threaded 29, electrically insulated from the tank by two insulating barrels 30, special hydrocarbon seals 31, electrically insulating washers 32, assembly nuts 33, sensor sensor lugs 34, anointed seals 35, 36, 37.

 A third annexed drawing represents a schematic diagram view of the combinatorial type of the electronic circuit, its circuit, nomenclature plan of these components, mechanical protection box.

First variant, regulation of an organ, electronic heating control by an electromechanical relay.

 Explanation of its simplified operation: by increasing the temperature, the voltage rises at the terminals of the PTC probe, controls the integrated circuit CD4001 YES-NO, mounted in flip-flop RS bistable, derived from the famous trigger of CHmitt, the output goes to level Zero logic, the V.OS BS170 semiconductor is no longer conductive, the R104 relay is no longer supplied, as is the heating element for the diesel filter defrost.

The process in the opposite direction occurs by decreasing temperature within a maximum-minimum tolerance window of three degrees Celsius.

 Service supply: regulated by transistor B409 associated with resistor R4 3.3T, Zener diode BZX79C 9.1, filter by capacitor 47 F / 16V, diode 1N4004 supports the protection function, against reverse voltage present at the input, protection of BS170 V.OS of the extra-breaking current, by diode 1N4148, avoidance of untimely operation of the RS flip-flop by parasitic induction, capacitor 1EF. Temperature adjustment, switching threshold, potentiometer P1 4.7, Cartier mini relay ref 104. Mechanical and electrical protection, TEKO box in entichoc plastic 4B3, reference P / 1 (not shown).

A fourth annexed drawing represents a view of the block diagram of the combinational type of the electronic circuit.

 Second variant: regulation of two controlled organs, powerful heating, weak heating, its flat circuit and nomenclature of these components, mechanical protection box.

 Principle, operating process, the same as for a single regulation of a heating element.

The CD4001 integrated circuit has four ID-ON doors, two doors used for relay 1 control, two doors used for relay 2 control.

At the same time the medium to be thermostated is heated by the two resistors called "Strong" & "Weak" only the weak heating remains in service. and serves as an adjunct, above this weak heating is in turn cut off. Minimum-maximum thresholds, by adjusting potentiometers P1 4,7K & P2.

 Very advantageous thermal heating control for limiting thermal fluctuations, to the limits that interest us.

 The electromechanical relays 104 will be replaced by P.MOS transistors.

 Mechanical and electrical protection, TEKO enclosure in ABS entichoc material. (not shown).

Claims (5)

 1- Diesel filter anti-waxing, without main modification of the "Roto-Diàsel k Purflux" diesel filters, characterized in that it has a crown spacer (19), closed by an iron, steel base (21) , or -in alpax, for petroleum product and in that it is heated in its interior center by an electrical resistance shielded two turns (23) supplied with 12 Volts 10 AmPères. A silicon sensor with a positive temperature coefficient inside the crown (27 '), controls an electronic relay and the heating element.  2- Diesel oil filter anti-waxing according to claim 1, characterized in that it comprises a crown spacer (19) and a bottom, made of iron, steel, or cast in alpax (21) for petroleum product. 3- Anti-waxing of diesel fuel filter according to claims 1 & 2, characterized in that it comprises an electrical heating resistance shielded two turns for petroleum product inside the support crown - (23). 4- Diesel oil filter anti-waxing according to claims t, 2 & 3, characterized in that it includes an electronic relay control outside the tank, and thermostatically controlled by a silicon probe with positive temperature coefficient (27) inside the tank. 5- Diesel oil filter anti-waxing according to claims 1, 2, 3, & 4, characterized by the stacking of crown spacers for the supply of 12 & 24 Volt electric current.