RU2171390C1 - System to delivery water into internal combustion engine and system water storage tank - Google Patents

Abstract

FIELD: transport engineering: supply systems of diesel and gas engines. SUBSTANCE: proposed invention makes it possible to reduce considerably time required for melting of ice in tank at below temperature, to maintain required water temperature during operation of engine and to preclude ice covering of pipeline at long outdoor storage of engine. Shape of tank is optimum from point of view of provision of strength in case of water freezing. Provision of outer heat insulation layer reduces heat losses in system. System has tank for storing water, device for water atomizing in engine, pipelines and valves. System is made for filling fuel into engine water supply pipeline at disconnection of this pipeline from tank when preparing the engine for long outdoor storage. Tank is made heated and is provided with space for passing engine heat-transfer liquid between walls. Liquid circulating in engine cooling system or supplied from starting preheater is used as heat-transfer liquid. Water storage tank has outer heat insulation layer and curvilinear surface in bottom part. EFFECT: improved reliability in operation. 6 cl, 1 dwg

Description

 The invention relates to a transport engine and can be used in power systems of diesel engines and gas engines.

 It is known that by reducing the combustion temperature of the working mixture, the content of the most toxic component, nitrogen oxides, in the exhaust gases of the engines can be significantly reduced. One way to reduce the combustion temperature is to inject water into the cylinders or into the inlet pipe.

 For the injection of water into the engine, a system can be used containing a tank for storing water, a device for supplying it to the engine, pipelines and a nozzle (see, for example, SU 1006791, IPC F 02 M 25/022, 1983). A common drawback of such systems during their winter operation is the freezing of water in the tank and remaining in the pipelines after turning off the engine. Subsequent use of the system is not possible until the tank and pipelines warm up due to an increase in temperature in the engine compartment of the vehicle. In addition, freezing water can lead to mechanical damage to the tank and the formation of ice plugs in pipelines.

 The objective of the invention is to improve the operational characteristics of the system.

 The problem is solved by the fact that the system of supplying water to the internal combustion engine, comprising a tank for storing water, devices for spraying water in the engine, pipelines and pipe fittings, is configured to fill with fuel a pipe for supplying water to the engine when the pipe is disconnected from the tank, and the latter is made heated with a cavity for the flow of engine coolant between the walls.

 The system can be equipped with a fuel line with a shut-off element and non-return valves, through which water from the tank or fuel enters the engine water supply pipe.

 The pipeline supplying water to the engine, it is advisable to perform heated with a casing, forming a cavity for the flow of coolant of the engine.

 The system can be made with the possibility of using as a heat carrier fluid circulating in the engine cooling system. Fluid may come from a heater used to start the engine.

 Distinctive features of the invention allow, at a negative ambient temperature, to significantly reduce the melting time of the ice in the tank, maintain the set water temperature during engine operation, and fill the pipeline to supply water from the tank with fuel before long-term parking during engine storage.

 The problem is also solved by the fact that the tank for storing water supplied to the internal combustion engine for spraying, containing a filler hole and an outlet channel, is made with a cavity for the flow of engine coolant between the walls, is equipped with an outer layer of thermal insulation and has a curved convex surface in the lower part . In cross section, the tank may have the form of a circular segment. The specified shape of the tank minimizes the stresses arising during the freezing of water, and the presence of the outer layer of thermal insulation reduces heat losses in the system.

 From a structural point of view, it is advisable to provide the tank with a valve assembly in which the output channel is made, a channel for supplying the engine coolant and an additional channel for connecting to the fuel line, and check valves are placed through which water or fuel enters the output channel.

 The drawing shows a system for supplying water to a gas internal combustion engine.

 The system comprises a tank 1 for storing water with double walls, between which a cavity 2 is made for the flow of the engine coolant. The tank contains an outer layer of thermal insulation 3, a neck 4 with a filler opening, a valve assembly 5 in which the outlet channel 6 is made, a channel 7 for supplying liquid from the engine cooling system and an additional channel for supplying fuel in which the first non-return valve 8. is located. The second non-return the valve 9 is placed in the hole through which water from the tank 1 enters the outlet channel 6. The coolant is discharged from the tank 1 through the pipe 10.

 The system includes a pipeline 11 for supplying water to the engine with a casing forming a cavity 12 for the flow of coolant entering through the channel 7 of the tank valve assembly. The coolant is discharged from the cavity 12 through the nozzle 13. Water from the tank is supplied by the pump 14 to the nozzle 15, which is installed in the inlet pipe of the engine. On diesel engines, nozzles are installed in cylinders. To clean the water entering the engine, a filter 16 is designed.

 A fuel line (gas line) 17 is connected to the valve assembly 5 of the tank with a shut-off element made in the form of an electromagnetic valve 18.

 The gas pipe 17 is connected to a gas reducer 19 of the engine power system.

 The system operates as follows.

 After starting and warming up the engine, a valve is opened (not shown in the drawing), through which liquid from the engine cooling system enters cavity 2 of tank 1 and cavity 12 of pipeline 11. According to the thermal calculation, it is sufficient to melt ice in tank 1 and maintain a positive temperature in it only part of the heat given off by the engine to the cooling system. Accordingly, a part of the coolant flow circulating in the engine is diverted to the channel 7. The required flow rate of the coolant used as a coolant can be set by selecting the cross section of the supply pipe, throttle washer, or by using an adjustable valve (not shown in the drawing). After the water is heated to a predetermined temperature, the pump 14 is turned on. The non-return valve 9 opens and water passes through the outlet channel 6, the pipe 11 and the filter 16 enter the nozzle 15. When the engine is stopped, the pump 14 is turned off and the non-return valve 9 closes. Then open the electromagnetic valve 18, and gas from the gearbox 19 through the gas pipe 17 through the check valve 8 enters the pipe 11, displacing the remaining water in it.

 When using the described system on a diesel fuel, the fuel pumped by a booster pump enters the pipe 11.

Claims (7)

 1. A system for supplying water to an internal combustion engine, comprising a tank for storing water, devices for spraying water in the engine, pipelines and pipe fittings, characterized in that it is configured to fill with fuel a pipe for supplying water to the engine when the pipe is disconnected from the tank, and the latter is made heated with a cavity for the flow of engine coolant between the walls.  2. The system according to claim 1, characterized in that it is equipped with a fuel line with a shut-off element and check valves, through which water from the tank or fuel from the engine power supply system enters the water supply pipe to the engine.  3. The system according to one of claims 1 and 2, characterized in that the pipeline for supplying water to the engine is made heated, with a casing forming a cavity for the flow of the engine coolant.  4. The system according to one of claims 1 to 3, characterized in that it is made with the possibility of using as a heat carrier fluid circulating in the engine cooling system.  5. A tank for storing water supplied to the internal combustion engine for spraying, containing a filler hole and an outlet channel, characterized in that it is made with a cavity for the flow of engine coolant between the walls, is equipped with an outer layer of thermal insulation and has a curved convex surface in the lower part.  6. The tank according to claim 1, characterized in that in cross section it has the form of a circular segment.  7. The tank according to claim 6, characterized in that it is equipped with a valve assembly in which an output channel is made, a channel for supplying a coolant, an additional channel for connecting to the fuel line and check valves are placed through which water or fuel enters the output channel.