FUEL-HEATING SYSTEM FOR DIESEL ENGINE

Abstract: A system for preheating diesel fuel before being introduced into chamber of internal combustion engine (5), particularly before the fuel passes fuel filter (2) (referred to in this case as "energized diesel filter"), that comprises two main parts, i.e., filtering element (2) and preheating element (3), wherein the heat needed to reach the burning point of the diesel fuel by the presence of preheating will be less in amount compared to the system without preheating. In addition, compression heat will remain constant so the combustion of the diesel fuel will be relatively perfect which in turn improves the diesel engine performance.

Description: Description FUEL-HEATING SYSTEM FOR DIESEL ENGINE Technical Field of Invention This present invention relates to fuel-heating system for diesel engine, particularly to diesel fuel-heating system used within or with fuel filters. Background of Invention As being widely known, the freezing of paraffin in the diesel fuel brings about the elements of fuel filter to be clogged. Especially when ambient temperature is relatively low, some problems arise in the operation of internal combustion engines, particularly diesel engines. The clogging of filter elements of the engine owing to the freezing of paraffin during cold wheather can be prevented by preheating the diesel fuel before being introduced into the chamber of internal combustion engine. The preheating of fuel, a prerequisite for the thermal expansion, expands fuel volume and in turn apparently increases engine efficiency. Despite its main function of preventing problems related to freezing in internal combustion engines, particularly internal combustion engines, fuel heating considers as well methods to solve the related environmental hazards such as those for decreasing particles emission in the sorrounding atmosphere. The application of this invented preheating system is intended to improve the combustion performance of the diesel fuel in the internal combustion engines, accelerate the engine performance and minimize the combustion residu expelled to the athmosphere . Summary of Invention The object of this invention is to provide fuel- preheating system preceeding the introduction of the fuel into the chamber of internal combustion engine, particularly before the fuel passes through fuel filter (referred to in this case ^ energized diesel fuel filter'), in which the heat needed to burn (burning point) the diesel fuel is less than that needed to burn the same in the system applying no preheating action. In addition, owing to constancy of compression heat, the preheated diesel fuel whose combustion is relatively perfect, will improve the diesel engines performance. Another object of this invention is to provide preheating system comprising two main parts, i.e. filtering part and preheating one which can eliminate to maximum extent the emission of hazardous particles to the athmosphere due to the preheating, prevent the clogging of the filter elements due to the freezing of paraffin, improve engine efficiency and minimize production cost. Brief Description of the Drawing Detailed object of invention can be traced from the following description and figures of invention attached along with. Figure 1 is basic construction of an energized diesel fuel filter with heat derived from the fluid. Figure 2 is the construction of energized diesel fuel filter with heat derived from the element. Figure 3 is the construction of energized diesel fuel filter with a heat extractor to extract heat expelled from engine exaustive gases. Figure 4 is schematic diagram of diesel fuel flow passing through heat extractor for exhaustive gases. Detail of the invention Energized diesel fuel system according to this invention comprises substantially two component, i.e., filtering element and preheating element . Heat used in preheating can be extracted from hot water radiator (engine- cooling water) and engine-cooling lubricant, both are in the form of liquid, and from muffler heat expelled from exhaustive gas conduit and heating element . Basic contstruction of energized diesel fuel with heat extracted from fluid is shown in Figure 1. This construction comprises a cyilindrical heat tube (1) disposed in it a filter tube (2) . Between the outer periphery of the filter tube housing (2) and the inner one of the heating tube housing (1) , there is a heating fluid circulation chamber (3) . Heating fluid originating from the flowing engine- cooling fluid (radiator, not shown) is introduced into heating chamber (3) through heating fluid inlet channel (4) . The fluid will further circulate in the heating chamber (3) to preheat the diesel fuel flowing into filter tube (2) . At the end of its circulation within the heating chamber (3) , heating fluid will be forced out through the outlet channel (5) . The preheated diesel fuel within the filter tube (2) will be tranferred into combustion chamber of the internal engine . Figure 2 shows a diesel fuel filter with heating element. In this system, between the inner- peripheral wall of the heating tube housing (1') and outer peripheral wall of filter tube (2 ' ) , there are disposed a plurality of tubular heating elements (3 1 ), wherein heat is supplied from outside. To isolate heat so as not to flow from the heating tube housing (1'), the space between the inner peripheral wall of filter tube housing (2') and outer peripheral wall of filter tube housing (2) is covered with isolator (4'). Referring now to Figure 3, it is shown the construction of heat remover for the engine exhaustive gases. Heat for preheating the exhaustive gases from the engine is drawn from the exhaustive gases flowing through drainage pipe, wherein along the longitudinal part of the cylindrical pipe for the exhaustive gases (1"), there is wounded a diesel fuel pipe coil (2") of specified windings. Furthermore, the entire • surface of the fuel channel winding is covered with isolator (3") that functions as a heat storage as well as an isolator for heat remover that transfers heat from the exhaustive gases so as not to directly communicate with the athmosphere. The diesel fuel from the tank is introduced into the inlet (4") at the beginning of the fuel pipe winding (2") and expelled finally through the outlet (5") at the end of coil winding of fuel channel pipe (2") . Scheme of diesel fuel flow through heat remover as being disclosed in Figure 3, will be further shown in Figure 4. Figure 4 shows diesel fuel originating from fuel tank (1"') before being introduced into fuel filter (2"'); this diesel fuel flow channel is woundedly passed through exhaustive gases pipe (4"') so as to be preheated conductively by the heat contained within exhaustive gases pipe (4"') and to introduce in preheted condition further into the combustion chamber (5"') (after passing filter (2'") . Due to preheating, it is expected that the combustion of diesel fuel within the engine will be more perfect so that the engine performance will increase and the residu of the combustion process will be minimized. Of course, it should be understood that the scope of the invention is not limited to the description and the drawings attached. All the explanations disclosed within the description represent merely illustrative and explanatory. All variations and modifications can be applied by the persons skilled in the art as long as they are still in the scope of invention.

Claims: Claim 1. System for preheating diesel fuel before being introduced into the chamber of internal combustion engine, particularly before the fuel passes fuel filter comprising two main parts, i.e. filtering element and preheating element, characterized in that heat energy for the preheating can be derived from heat brought by water radiator or engine-cooling water and brought by the engine-cooling lubricant, both are in the form of liquid, and can be derived as well from muffler heat contained within the exhaustive gases channel and within the heating element. AMENDED CLAIMS [received by the International Bureau on 10 April 2001 (10.04.01); original claim 1 replaced by amended claim 1 (1 page)] System for preheating diesel fuel before being introduced into the combustion chamber of an internal combustion engine for the purpose of improving the efficiency of the engine and avoiding the clogging of the filter element before the fuel passes through a fuel filter comprising two main parts in the form of a filtering element and a preheating element, the filter element can greatly eliminate the emision into the atmosphere of hazardous particles due to heating in combustion chamber of the diesel engine, in which the heat needed to burn the diesel fuel is less than that needed to burn the same in the systems adapting no preheating system, characterized in that heat energy for preheating the diesel fuel is extracted from the heat brought by water radiator and or engine-cooling lubricant, both are in the form of liquid, or from the muffler heat contained within the exhaustive gases channel and the heating element.

Inventors: WIJAYA HERU PRASANTA, WIJAYA, HERU, PRASANTA
Applicants: WIJAYA HERU PRASANTA, WIJAYA, HERU, PRASANTA
Application year: 2000
Main classification: F02M31
IPC codes: B01D35, F02B3, F02M31, F02M37