RU192532U1 - Autonomous engine start-up system with thermoelectric generator - Google Patents

Abstract

The utility model relates to devices for maintaining thermal conditions and engine preheating. Fuel under pressure is fed through the fuel line to the nozzle, which in turn sprays it in the combustion chamber. The electric motor of the air blower rotates the impeller, which in turn draws combustion air from the channel through the cooling radiator and, leaving the radiator guide holes, is pumped into the combustion chamber. A protective mesh against dust and dirt is installed on the air intake duct. The ignition of the air-fuel mixture is carried out with a glow plug. Coolant is introduced into the channel and as the heat exchanger heats up, the heated liquid exits the channel. Thermoelectric generator modules are installed on the exhaust gas exhaust channel that generate electric energy to reduce the power consumption of the pre-heater, the loss of charge and the starting current of the battery of the tractor engine.

Description

The utility model relates to engine manufacturing and operation of vehicles, and specifically to devices for maintaining thermal conditions and engine preheating.

A known system of autonomous engine pre-treatment (No. 183417 RU, publ. 09/21/2018) containing a diesel pre-heater connected to the engine by a piping system, and including a heater boiler, a pump unit, a fuel tank made independent of the engine fuel system, pipelines connection of the system and removal of combustion products from the heater to the engine false tray.

Also known is a liquid cooling and heating system for an internal combustion engine (No. 2186229 RU, publ. February 27, 2002), comprising a radiator with liquid filling tanks, a bypass channel, hot and cold circuits for circulating coolant, an electronic temperature control unit, an oil heater located in the pan, a catalyst heater and a coolant heating device located in the bypass housing, which allows to increase the efficiency of engine warming while simplifying the design of the systems .

Known heater (No. 250606, IPC F 02 N 17/06) for preheating an internal combustion engine with a nozzleless burner, operating without a fuel pump and nozzle, in which the working mixture is prepared by ejecting liquid fuel with air

It is also known a device (No. 208375, F 02 N 17/04, F 01 M 5/02), which contains a boiler for heating the liquid, a combustion chamber with an exhaust pipe, a burner with a fuel line and a shut-off valve. Air is introduced tangentially into the fanless burner of the heater and,

Having received the peripheral speed, it picks up fuel coming by gravity and sprays it.

The closest prototype to the proposed technical solution is an autonomous prestarting heater Teplostar [1], consisting of a heat exchanger, temperature and overheating sensors, a glow plug, an air blower, a pump, a fuel pump, a combustion chamber and coolant supply and exhaust pipes providing autonomous prestarting heating internal combustion engine to an optimal thermal mode of operation.

The disadvantages of the above devices include the fact that they work when the internal combustion engine is off and consume the energy of the vehicle’s rechargeable batteries, which can lead to a significant reduction in its charge and a decrease in the starting current when the engine is started.

The present invention provides a new technical effect-the conversion of thermal energy from the exhaust gas of the pre-heater into electrical energy, aimed at ensuring the operation of the heater itself, and as a result, the reduction of electricity consumed from the car’s batteries through the use of a thermoelectric generator.

This technical effect is achieved by the fact that thermoelectric generator modules are installed on the outside of the walls of the exhaust gas outlet channel, cooling radiators, for example air coolers, are fixed on the outside, while the thermoelectric generator modules are connected to the air blower electric motor via a step-up voltage converter.

Shows a General view of the proposed device.

An autonomous engine pre-preparation system with a thermoelectric generator consists of a cylindrical body 1, divided into two working cavities 2 and 3. The first cavity 2 contains a heat exchanger 4 with guide swirls, inside of which there is a combustion chamber 5 with a flame tube 6 and a nozzle 7. Front the diffuser section of the combustion chamber 5 is a glow plug 8, which is screwed and spatially oriented in the flow at an angle of 45 ° to the axis of the heater. In the second cavity there is an impeller 9 of an air blower with an electric motor 10, behind which there is an exhaust gas outlet channel 11 with fixed thermoelectric generator modules 12. On the outside of the generator modules 12 there are cooling radiators 13, air intake pipes 14 and 15. On the air intake pipes 14 protective nets are installed 16. On the outer part of the casing there are inlet and outlet channels of the coolant 17, 18, as well as a fuel supply pipe 19. On the upper part of the casing The electronic control unit 20 and the boost converter 21 are included.

The proposed device operates as follows.

Fuel under pressure through the fuel pipe 19 is supplied to the nozzle 7, which in turn sprays it in the combustion chamber 5. The electric motor 10 of the air blower rotates the impeller 9, which in turn sucks the combustion air from the channel 14 through the cooling radiator 13 and, leaving the guides the holes of the radiator 15, is injected into the combustion chamber 5. A protective mesh 16 is installed on the intake air intake channel from dust and dirt. Ignition of the air-fuel mixture is carried out by the glow plug 8. The cooling liquid is supplied to the channel 17 and, as the heat exchanger 2 heats up, the heated liquid exits the channel 18. Then, the internal combustion engine circulates through the cooling system. On the exhaust exhaust channel 11, thermoelectric generator modules 12 are installed that generate electrical energy.

Due to the increase in heat transfer from highly heated gases to the walls of the exhaust gas channel And, the temperature difference on the sides of the thermoelectric generator modules 12 increases, which contributes to the generation of electrical energy, which is then supplied to the boost converter 21 and then to the electric motor 10 of the air blower. The electronic control unit 20 performs the functions of combustion control and management, and is also responsible for the redistribution of electricity during operation of the pre-heater.

Thermoelectric generator modules that generate electrical energy reduce the power consumption of the pre-heater, the loss of charge and inrush current of the battery of the tractor engine.

Source:

1. Autonomous prestarting heater Teplostar: http://avtoclimatika.ru/catalog/avtonornnyjj-zhidkostnyjj-podogrevate1-2/

Claims (1)

Autonomous engine pre-start system with a thermoelectric generator, including a combustion chamber, coolant inlet and outlet channels, a heat exchanger, a glow plug, a nozzle, a supercharger impeller, an electric motor, an electronic control unit, a fuel pipe, an exhaust outlet channel, a combustion air inlet channel, which differs the fact that thermoelectric generator modules are installed on the outer side of the walls of the exhaust gas outlet channel, on the outer side of which radiator s cooling, for example air, wherein the thermoelectric generator modules via a step-up voltage converter connected to the electric blower.

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