JPS61188217A - Burner - Google Patents

Abstract

PURPOSE:To enable heating to be quickly accomplished just after an engine has been started associated with no environmental contamination by arranging both a heating glow plug for fuel vaporization and an ignition plug inside an air duct. CONSTITUTION:A feed valve 82 is opened by the quantity of controlled fuel 84 allowing fuel to be fed into a burner 41 through a fuel flow path 81 so as to heat it up with a heating glow plug electrically energized. This allows the heating glow plug 6 to be quickly heated up to the stated temperature permitting a spark discharge to take place at an ignition plug 7. Fuel vaporized by the heating glow plug 6 is mixed in a combustion chamber 41 with a part of the air inducted from an air inlet 43, is ignited. The air from the air inlet 43 is heated up by the combustion gas, is forwarded into a heat exchange (not shown), and then, is allowed to heat the air in a cabin through interchange of heat. This configuration enables heating to be quickly accomplished by a simple device associated with no environmental contamination.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a combustor of a heating device for rapidly heating the interior of an automobile driven by an internal combustion engine.

(Prior art) Conventionally, indoor heating in automobiles takes the cooling water from the internal combustion engine through hot water piping, passes it through the heater body made up of a heater core, blower, etc., and sends air into the heater body to heat the air and heat it. A device that performs heating, or an internal combustion engine that burns fuel in a burner and heats the room using the amount of heat generated (Japanese Patent Application No. 10686/1986)
No. 9) is used.

(Problems with the prior art) In this method of using internal combustion engine cooling water for indoor heating, the temperature of the cooling water rises slowly, so it takes time for the heater body to send out hot air. During this time, the heating function of the heater is lost. In particular, it takes more than 10 minutes for a gasoline engine and more than 20 minutes for a diesel engine to complete the heating function of an internal combustion engine. During this time, there were inconveniences such as the inside of a car being cold in cold regions, requiring people to wear winter clothing, and the defroster, which removes frost, ice, etc. from the vehicle windows, not working properly. Furthermore, when the vehicle is traveling down a long downhill slope, the temperature of the cooling water drops and the cooling water cannot be supplied for heating. In particular, since diesel engines are compression ignition type engines, they are sensitive to exhaust gas temperature or cooling water temperature relative to engine load, and the above-mentioned drawbacks are significant. Furthermore, diesel engines are sensitive to combustion in cold weather, and produce significant white smoke and odor as a result of incomplete combustion.

In addition, heating methods that use fuel separately from the internal combustion engine require troublesome treatment of combustion odors and exhaust gas, and require complicated control mechanisms and control devices, which have the disadvantage of increasing costs. However, there still remains a problem in terms of environmental pollution.

(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems related to indoor heating of conventional internal combustion engines, to eliminate the need for a complicated control mechanism, to eliminate the problem of environmental pollution, and to immediately An object of the present invention is to provide a combustor for a heating device for an automobile that can provide warm air more quickly.

(Summary of the Invention) In order to achieve the above objects of the present invention, a heating glow plug is provided in an air duct to vaporize fuel, and a spark plug is provided to ignite the vaporized fuel vaporized by the heating glow plug. A combustor is provided.

(Embodiment) FIG. 1(A) is a cross-sectional view showing a configuration of an embodiment of a combustor according to the present invention, and FIG. 1(B) is a configuration diagram as viewed from arrow direction A in FIG. 1(A). FIG. 2 is a circuit diagram of the main parts of this embodiment, and FIG. 3 is a block diagram of a heating device for an automobile using this embodiment.

As is clear from the figure, a combustor 4 and a heat exchanger 5 are provided in the middle of a pipe section extending from an air cleaner 2 of a diesel engine or a gasoline engine 1 to an intake pipe 3 constituting an air duct. ing. Further, an intake vibe 31 may be present in parallel with the combustor 4 and the heat exchanger 5.

In FIG. 1(A), a cylindrical combustion chamber 41 made of ceramic or heat-resistant steel is provided inside the combustor 4, and an upstream portion 41a in the air flow direction is impregnated with fuel. It is made of a porous substance that vaporizes, and opens toward the heat exchanger 5 as a combustion chamber outlet 42 in the downstream direction. A plurality of air ports 43 are bored in the cylindrical surface of the combustion chamber 41. Considering the combustion state inside the combustion chamber 41, the air ports 43 in the upstream direction are designed to weaken the air flow near the ignition point. is a small hole, and the downstream air port 43 is a large hole, each having a predetermined size and location. It is drilled at the location of Reference numeral 44 denotes an intake air passage, which forms a passage that introduces air flowing into the combustor 4 to the outside of the combustion chamber 41. and flows into the combustion chamber 41.

6 is a heating glow plug in which a coil is enclosed in a ceramic or a metal tube; a resistance wire 61 having a positive temperature coefficient is embedded in the center of the pipe; The temperature of the heating glow plug 6 can be maintained at a predetermined temperature by the energized lever as one side of the heating glow plug 6. In addition, the bridge circuit 63
Since the resistance value of the resistance wire 61 can be calculated based on the balanced state of becomes. Reference numeral 62 denotes a plug controller, which heats the heating glow plug 6 by energization and maintains it at a predetermined temperature to vaporize the fuel, and a bridge circuit 63 that detects the temperature of the heating glow plug 6, and detects the state of the bridge circuit. The comparator 64 has a comparator 64 that performs the calculation, and a timer 65 that holds the instruction of the comparator for a predetermined period of time.

Reference numeral 7 denotes a spark plug that ignites vaporized fuel by spark discharge, and the vicinity 1 of the tip of the heating glow plug 6 where the vaporized fuel and air mix to produce a combustible mixture, and the spark generating portion 71 of the spark plug 7. It is arranged. Reference numeral 72 denotes an ignition controller which energizes the ignition plug 7 and controls the spark generator 71 when fuel is supplied, the heating glow plug 6 is energized and the fuel can be vaporized, and the fuel is unburned. It is configured to emit a spark. That is, when the fuel controller 84, which will be described later, issues a command indicating that fuel is being supplied, and the plug controller 62 detects the temperature of the heating glow plug 6, and issues a command indicating that there is no combustion in the combustion chamber, In response to these commands, the ignition controller 72 starts energizing the spark plug 7. Further, the ignition controller 72 has an oscillator 73 that oscillates a pulsating current from a DC power source, and a high voltage coil 74 that generates high voltage by the pulsating current from the oscillator 73, and the spark plug 7 supplies high voltage from the high voltage coil 74. When this happens, a spark discharge is generated in the spark generating section 71 and the combustible air-fuel mixture is ignited.

8 is a pipe-shaped fuel supply device provided above the heating glow plug 6, and has a fuel passage 81 in the central shaft portion;
Fuel is supplied through the supply valve 82. Further, from the fuel passage 81, the fuel vaporizing porous body 4 on the wall surface of the combustion chamber 41
3a, the fuel approaches the heating glow plug 6, is heated by the heating glow plug 6, and is vaporized. 84 has a supply valve switch 84a, a relay 84b operated by the supply valve switch 84a,
This is a fuel controller that opens and closes the supply valve 82 and energizes the bridge circuit 63, and is further configured to send a command as to whether or not fuel is being supplied to the ignition controller 72.

FIG. 2 is a circuit diagram of the main parts of this embodiment, showing the circuits among the plug controller 62, ignition controller 72, and fuel controller 84.

In the figure, TI, r2. r5 is a resistor, and the Wheatstone resistance value together with the resistance wire 61 of the heating glow plug 6 is very small compared to the resistance value of the resistance wire 61. To explain the operation of the combustor of this embodiment, first, The supply valve switch 84a is turned on by the operation of the switch 172b, which will be described later.
Then, the supply valve 82 is opened and fuel is supplied into the combustion chamber 41 through the fuel passage 81, and the relay 84b is turned on, so that resistance is generated through the resistor r3! ! 61 is energized, and the heating glow plug 6 is heated. Since the resistance value of the resistor r3 is small, the temperature of the heating glow plug 6 rises rapidly, and the temperature rises to a predetermined temperature, for example, 35.
When the temperature reaches around 0°C, the comparator 64, which detects the balanced state of the Wheatstone bridge made up of resistors r1+r2, r5 and the resistance wire 61, turns off the relay 84b via the timer 65, and turns off the bridge circuit. 63
Stop energizing. Note that the timer 65 is a timer that holds the output of the comparator 64 for a predetermined period of time and transmits it to the relay 84b.

On the other hand, the oscillator 73 is energized by the supply valve switch 84a.
oscillates a pulsating current, and the pulsating current is boosted to a high voltage by the high-voltage coil 74, so that the spark plug 7 starts spark discharge at its spark generating portion 71. And the combustion chamber 41
The fuel supplied to the spark plug 7 and vaporized by the heated heating glow plug 6 mixes with a part of the air from the air port 43 inside the combustion chamber 41 to form a combustible mixture. It is ignited by a spark discharge, creating a flame and producing high-temperature combustion gas. Then, the air flowing in from the air port 43 is heated to a high temperature, and the hot air is sent to the heat exchanger 5 from the combustion chamber outlet 42.

Note that when fuel is supplied into the combustion chamber 41 and combustion of the fuel continues, the spark from the ignition plug 7 is unnecessary, and when the temperature of the heating glow plug 6 rises above a predetermined temperature, the resistance wire 61 Since the resistance value becomes large, the comparator 64 detects the state of the bridge circuit 63 and stops the operation of the oscillator 73 via the timer 65, thereby stopping the generation of sparks. In addition, since the vicinity of the spark plug 7 is the ignition point of the flammable mixture, the air port 43 is made into a small hole to weaken the air flow, but if combustion does not continue for some reason and the fire is extinguished, the heated glow plug 6 decreases, the comparator 64 detects a change in the resistance value of the resistance wire 61, issues a command to the ignition controller 72, activates the spark plug 7, and continues combustion in the extinguished combustion chamber 41. urge

In FIG. 3, a heat exchanger 5 takes in fresh air from an intake air intake port 10 that communicates with the interior of an automobile that requires heating, and the new air absorbs heat from the combustion gas and exchanges heat with the warm air. A blower 12 is provided for blowing air to an outlet 11. The air outlet 11 opens to an outlet of a cooling water heater core 13 that is separately placed for room heating. Therefore, the illustrated blower 14, air conditioner evaporator 15, and hot water passage 16 are each component of a heater device that uses cooling water.

17 is a controller which receives a power generation signal GT from a generator 18 driven by the engine l, an ON/OFF signal FS from an operation switch 19, and a water temperature signal WS from a water temperature sensor 20 that detects the engine cooling water temperature. , a main control section 171 to which a start signal ST and an accelerator opening signal AS are input, and a switch section 172. The main control unit 171 has a computer configuration including a processing device, memory, and an input/output interface.

The switch section 172 includes a switch 172a that controls ON/OFF of the blower 12, and a switch 172b that supplies power to the supply valve switch 84a, the bridge circuit 63, and the like. 21 is a power supply battery, 22 is a key switch, 23
is the starter motor.

Next, the operation of the automotive heating system having the above configuration using the combustor according to the present invention will be explained. When the engine key switch 22 is turned on, the car's power is turned on, but since the engine 1 has not started, the main control unit 171
is the switch 172a.

Since 172b is kept OFF, the heating device is not operating. When the key switch 22 is further rotated to apply voltage to the starter motor 23 and rotate it, the engine 1 is started. Then, at the same time as the engine 1 is started, the main control section 17
1 turns on the switch 172b and closes the supply valve switch 849, the relay 84b turns on as described above, the bridge circuit is energized, and the heating glow plug 6 connects to the resistance wire 6.
1 and is heated to a predetermined temperature. Further, since the supply valve switch 84a is turned ON, the fuel valve 82 is opened, and fuel is supplied from the fuel passage 81 into the combustion chamber 41, and the fuel is vaporized by the heated glow plug 6 and mixed with air. A flammable air-fuel mixture is generated near the spark plug 7. Furthermore, at the same time as the above-mentioned flammable mixture is generated, the relay 8
Since power is supplied to the oscillator 73 through 4b, the high voltage coil 74 is activated, spark discharge starts at the spark generator 71 of the spark plug 7, and the above-mentioned combustible mixture is ignited.
As mentioned above, the combustion gas and the air heated to a high temperature are sent to the heat exchanger 5.

On the other hand, when the -.
The AND with the ON signal FS of 1 is input to the main control unit 171 using software.

With this input, the main control unit 171 turns the switch 172a into
N is applied to the blower 12 to start blowing air. Therefore, the air from the intake air intake port 10 is heated by the high-temperature combustion gas and heated air in the heat exchanger 5, and is blown out from the air outlet as warm air, so that room heating starts immediately after the engine starts. It becomes possible.

Next, when the temperature of the engine cooling water rises to the extent that it can be used as hot water for room heating after a period of time has passed since the start of operation of the engine 1, a water temperature sensor 20 provided in the engine 1
is activated and outputs the water temperature signal WS, which causes the main control unit 171 to turn off the switch 172b, open the supply valve switch 84a, close the supply valve 82, and cut off the fuel supply.

Also, turn off the power to the heating glow plug 6 and spark plug 7.
FF, the blower 12 associated with the heat exchanger 5 is stopped, another blower 14 is operated, and the conventional cooling water heater starts heating operation.

Note that if the engine 1 is started with the operation switch 19 in the OFF state from the beginning, the generator 18
The power generation signal GT and the ON signal F of the operation switch 19
Since the logical sum with S is not input to the main control unit 171, the blower 12 does not operate. However, in this case, a large amount of air warmed by the flame is sent to engine l, so even if engine l is cold in winter, engine l
This makes it possible to start the engine quickly, making it a quick start device.

Although the present invention has been explained using one embodiment, various modifications are possible within the scope of the gist of the present invention, and these are not excluded from the scope of the present invention (effects of the invention). As described above, the present invention provides a combustor and a heat exchanger in the middle of the intake pipe leading to the engine, and the combustor is equipped with a heating glow plug and a spark plug that ignites fuel vaporized by the heating glow plug. The heat of the combustion gas is recovered by a heat exchanger and used as a heating heat source, and indoor heating can be effectively performed even immediately after the engine is started.

The spark plug is controlled by detecting the combustion state inside the device.
Enables efficient fuel combustion.

Furthermore, according to the present invention, even when the engine is cold in cold weather, a large amount of warm air heated by the combustor can be sent to the engine, so the engine can be started quickly and the blue-white smoke from the exhaust gas can be pumped into the engine. This prevents odors and odors and improves engine performance. In addition, the combustion gas from the combustor is not directly discharged to the outside, but is led to the engine and discharged together with the engine exhaust gas, so there is no need for special effort in processing the exhaust gas, and there are fewer problems with environmental pollution. .

[Brief explanation of the drawing]

FIG. 1(A,) is a cross-sectional view of the configuration showing one embodiment of the combustor according to the present invention, FIG. 1(B) is an explanatory view of the configuration as seen from the arrow force 1flA shown in FIG. 1(A), The figure is a circuit diagram of the main parts of this embodiment, and FIG. 3 is a block diagram of an automobile heating system using this embodiment. ■...Engine, 3...Intake pipe, 4...Combustor,
6... Heating glow plug, 7... Spark plug, 8...
...Fuel supply device. Patent applicant: Isuf Automobile Co., Ltd. Agent: Minoru Tsuji0; ω size

Claims (1)

[Claims] A combustor comprising: a heating glow plug installed in an air duct to vaporize fuel; and a spark plug igniting the vaporized fuel vaporized by the heating glow plug.