JPH026215A - Combustion type heating device for vehicle - Google Patents

Abstract

PURPOSE:To enable a heating device having a rapid build up of heating at low cost by utilizing the combustion heat of a burner heater for starting aid of an engine and accelerating of warming up and warming a cooling water efficiently to heat a body interior. CONSTITUTION:The fuel sent to a burner heater 5 of a heat exchanger 6 is evaporated in an evaporation part 5b and made in contact with a red heated heating part 5a followed by firing. As an intake air introduced into an inlet pie 2 by the drive of an engine 1 is taken into a combustion space S of the heat exchanger, the fuel is mixed with said intake air and started to combustion. The intake air is run into through an intake 61a, passed through the combustion space S, and run out to the inlet pipe 2. As the intake air is heated by the combustion heat of the heater 5 in this process, and the heated intake air is sent to the engine 1, the starting aid of the engine 1 is conducted. When an engine switch 101 is returned from st to ON after starting of the engine 1, then, the combustion of the heater 5 is continued as a sub-relay 103 and a combustion feed relay 206 are closed, accelerating the warming up of the engine 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a combustion engine for a vehicle that heats the intake air of a diesel engine to assist in engine starting and warm-up, as well as to heat the interior of a vehicle. The present invention relates to a type heating device.

[Conventional technology]

As a well-known combustion heating system for diesel cars, combustion heating uses a dedicated combustor to burn fuel and uses the combustion heat to heat engine cooling water (hereinafter simply referred to as cooling water) to heat the interior of the vehicle. There is a device.

As a well-known starting aid device for diesel engines, it burns fuel in the engine's intake pipe and uses the heat to heat the intake air to assist in starting the engine, while also reducing exhaust white smoke and engine noise after starting. [Problem to be solved by the invention] However, the above-mentioned combustion heating system for diesel vehicles burns fuel in a dedicated combustor and uses the combustion heat to warm the cooling water. Therefore, a fuel control mechanism and a safety mechanism are required to process the combustion gas and unburned fuel, resulting in a problem that the cost of the device increases.

In addition, the burner heater, which is used as a starting aid for the diesel engine mentioned above, only uses the large amount of thermal energy generated during combustion to assist in starting the engine and promote warm-up, and is still not fully utilized. .

The present invention was made in view of the above-mentioned problems, and utilizes the combustion heat of the burner heater, which is used to assist in starting the engine and promote warm-up, to efficiently heat the cooling water and heat the interior of the vehicle. The purpose of this invention is to provide a combustion type heating device for a diesel vehicle that is inexpensive and has a quick heating start-up.

[Means to solve the problem]

In order to achieve the above objects, the present invention provides: (1) a burner heater that burns fuel and heats the intake air of a diesel engine using the combustion heat; and a burner heater that heats the combustion heat generated in the burner heater to the cooling water of the engine. and a cooling water circulation circuit for the engine that returns from the heat exchanger to the heat exchanger via a hot water heater and the engine, and (2) ) In the above configuration, a first cooling water channel that extends from the cooling water outlet side of the engine to the cooling water inlet side of the heat exchanger, and a first on-off valve that opens and closes this first cooling water channel. a temperature sensor that detects water temperature on the coolant outlet side of the engine; and a second sensor that branches from the coolant outlet side of the hot water heater and bypasses the engine and reaches the coolant inlet side of the heat exchanger. a cooling waterway; a second on-off valve that opens and closes the second cooling waterway; a temperature sensor that detects the water temperature on the cooling water outlet side of the hot water heater; If the water temperature is higher than the water temperature on the cooling water outlet side of the heater, open the first on-off valve and close the second on-off valve, and conversely, if it is lower,
and a control means that closes the first on-off valve and opens the second on-off valve, thereby heating starts up more quickly. (3) Furthermore, the burner heater is attached to the heat exchanger. a combustion space in which fuel is burned, an intake port and an exhaust port that communicate with the combustion space from an intake pipe of the engine, and an inlet and an outlet of cooling water that exchanges heat with the combustion heat of the burner heater. By providing this, the combustion heat of the burner heater heats the intake air and the cooling water at the same time.

[Effect]

According to the above means, (1) The combustion heat of the burner heater heats the intake air of the engine to assist in starting and warming up the engine, and also heats the cooling water to promote heating in the passenger compartment. do the work.

(2) While the engine is cold, by bypassing the engine and circulating the coolant, heat dissipation from the coolant in the engine is eliminated, so the coolant can be heated more quickly by the combustion heat of the burner heater. . On the other hand, once the engine has been sufficiently warmed up and the engine waste heat is used to maintain the required temperature of the coolant, the coolant is returned to the normal hot water circuit that circulates the engine, and the waste heat from the engine is used to cool the interior of the passenger compartment. heating is performed.

(3) Also, the combustion space of the burner heater provided in the heat exchanger and the intake pipe of the engine are in communication, and a part of the intake air introduced into the intake pipe is taken into the combustion space and discharged to the intake pipe. Therefore, the intake air is heated by the combustion heat of the burner heater while passing through this combustion space. On the other hand, since there is provided a cooling water channel through which heat is exchanged by the combustion heat of the burner heater generated in the combustion space, the cooling water is heated while flowing through this channel.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described.

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention.

In the figure, ■ is a diesel engine, and an intake pipe 2 for introducing intake air is connected to the engine 1. Intake pipe 2
A heat exchanger 6 having an intake port 61a and an intake port 61b communicating with the intake pipe 2, and a cooling water inlet 62a and an outlet 62b is attached to the heat exchanger 6. To this heat exchanger 6,
A burner heater 5 that heats intake air by burning fuel is attached, and the burner heater 5 includes an energization control device 100 that applies an electric current to make the burner heater 5 red-hot, and a fuel supply device 200 that sends fuel such as light oil to the burner heater 5. It is connected.

The cooling water inlet 62a of the heat exchanger 6 is connected to a first cooling water channel 13a that extends from the cooling water outlet 1a of the engine 1 to the water pump 9 via a first on-off valve 10a.

On the other hand, the cooling water outlet 62b of the heat exchanger 6 is connected to the front hot water heater 7 and the rear hot water heater 8, which send warm air into the passenger compartment.
a, 8b, their outlets merge, one is connected to the cooling water return port 1b of the engine 1, one is branched off and bypasses the engine 1, and the second A second cooling water channel 13b is formed which reaches the water pump 9 via the on-off valve lOb, and this cooling water channel 13b is connected to the cooling water inlet 62a of the heat exchanger 6.

Note that 3 is a radiator, which constitutes a well-known cooling water channel with the engine 1.

That is, a water channel that enters the cooling water return port 1b of the engine 1 from the cooling water outlet 1a of the engine 1 via the thermostat 4 and the radiator 3, and a water channel that directly enters the cooling water return port 1b of the engine 1 via the thermostat 4. There is. When the water temperature is below the set temperature, the thermostat 4 is closed, and the cooling water circulates within the engine 1 as a flow shown by the dotted arrow in the figure. When the water temperature exceeds the set temperature, the thermostat 4 opens. The cooling water circulates between the engine 1 and the radiator 3 as a flow indicated by the solid arrow in the figure.

This cooling water circulation is performed by a water pump (not shown) provided inside the engine 1.

A temperature sensor 11 for detecting the water temperature is installed between the coolant outlet 1a of the engine 1 and the thermostat 4. On the other hand, a temperature sensor 11 for detecting the water temperature is installed just before the branch point at the confluence of the coolant outlet of the hot water heater. A temperature sensor 12 is attached.

FIG. 2 is a configuration diagram showing one embodiment of the energization control device 100 and fuel supply device 200 for the burner heater 5. As shown in FIG.

As shown in the figure, the energization control device 100 includes a main relay 102 that opens and closes a circuit that directly energizes the burner heater 5 from the power source 21 via the fuse 22, and a protective resistor 104.
A sub-relay 103 that opens and closes a circuit that is energized through the engine is connected to a controller 105, and the controller 105 is connected to a power source 21 through an engine switch 101.

The circuit that directly energizes the burner heater 5 is a circuit that causes overcurrent to flow through the burner heater 5 to cause it to rapidly generate heat, and the circuit that energizes through the protective resistor 104 causes a stable current to flow through the burner heater 5 and cause it to overheat. This is a circuit that generates heat without causing heat generation. Switching from the former circuit to the latter circuit is achieved by turning on the engine switch 101.
According to instructions from the controller 105, the engine cooling water temperature and power supply voltage are switched when a pre-programmed set time has elapsed.

On the other hand, the fuel supply device 200 includes a fuel tank 205, a fuel filter 201, an electromagnetic pump 202, and an electromagnetic valve 203.
The electromagnetic pump 202 is connected to the burner heater 5 via
The fuel is branched from between the solenoid valve 203 and connected to the regulator 204, and returns from the regulator 204 to the fuel tank 205, and the fuel circulates as shown by the solid arrow in the figure. Note that a pipe is provided from 204 to the intake pipe 2 for detecting the intake pressure and adjusting the fuel supply pressure to the burner heater 5. 206 is a fuel supply relay that opens and closes a circuit that supplies electricity to the electromagnetic pump 202 and the electromagnetic valve 203, and is connected to the controller 105, and when the engine switch 101 is switched from ON to ST, a signal is sent from the controller 205. Closed according to instructions. Here, the sub-relay 103 that opens and closes the circuit that energizes the burner heater 5 via the protective resistor 104 and the fuel supply relay 206 that opens and closes the circuit that energizes the electromagnetic pump 202 and the solenoid valve 203 to supply fuel to the burner heater are as follows: It remains closed even when the engine switch 101 is turned back to ON from ST, and unless the engine switch 101 is turned OFF, the closed state continues according to instructions from the controller 105 until the set time or the set water temperature is reached.

3(a) and 3(b) are cross-sectional views showing one embodiment of the heat exchanger 6. FIG.

As shown in the figure, the heat exchanger 6 includes a cylindrical case 61 that integrally has star-shaped radiation fins 61c inside, an inlet 62a and an outlet 62b for passing cooling water W through the outer periphery of the cylindrical case 61.
An outer cylindrical case 62 is welded.

Note that an intake port 61a and an intake port 61b communicating with the intake pipe 2 are provided at both ends of the cylindrical case 61, and these are welded to the intake pipe 2. A burner heater 5 is installed near the intake port 61a. 63 is a lid welded to the cylindrical case 61, and 64 is an intake air introduction plate joined to the intake pipe 2 near the intake port 61a. The fuel vaporized in the vaporization part 5b of the burner heater 5 is ignited when it touches the red-hot heat generation part 5a, and is combusted in the combustion space S by mixing with the intake air that has flowed in from the intake port 61a, so that it passes through the combustion space S and the exhaust port 61b. More intake pipe 2
The intake air flowing out is heated by the combustion heat of the burner heater 5, and the combustion heat of the burner heater 5 is transmitted to the radiation fin 61c and heat exchanged with the cooling water W flowing around the radiating fin 61c.

Figure 4 shows an example in which the above-mentioned device is mounted on a vehicle.The main components of the device are a burner heater 5, a heat exchanger 6, a front hot water heater 7, and a rear hot water heater 8a and 8b.
, a water pump 9, and on-off valves 10a and 10b are arranged as shown in the figure, and cooling water is circulated as shown by the arrow.

FIG. 5 shows an electrical circuit diagram of the main parts of the above embodiment.

In the figure, 23 is a heater switch connected to the power supply 21 via a fuse 22, and is connected to the engine switch 101.
It is also connected to a controller 105 that controls energization and fuel supply to the burner heater 5 .

Furthermore, from the heater switch 23, the water pump 9
A relay coil 3 having a relay contact 31b of an energizing circuit
1a, a relay coil 32a having a normally closed relay contact 32b of the energizing circuit of the first on-off valve 10a, and a relay coil 33a having a relay contact 33b of the energizing circuit of the second on-off valve 10b via the controller 24. connected. The controller 24 includes a temperature sensor 11 that detects the water temperature near the coolant outlet 1a of the engine 1 in FIG. 1, and a temperature sensor 12 that detects the water temperature near the coolant outlet of the hot water heater 7.8b. It is connected.

The temperature T detected by the temperature sensor 11 and the temperature T'+z detected by the temperature sensor 12 are compared by the controller 24.

> In the case of T, t, an instruction is issued to energize the relay coil 31a and not to energize the relay coils 32a and 33a.
Water pump 9 and first on-off valve 10a are energized, and conversely, when TII<T1□, relay coils 31a, 3
An instruction to energize 2a and 33a is issued, and the water pump 9 and the second on-off valve 10b are energized.

25 is a switch for the front hot water heater 7, 26 and 27 are switches for the rear hot water heaters 8a and 8b, the switch 25 is connected to the fan motor 28 of the front hot water heater 7, and the switch 26 is connected to the fan motor of the rear hot water heater 8a. 29, the switches 27 are respectively connected to the fan motors 30 of the rear hot water heater 8b. In addition, from these switches 25, 26, 27, a relay coil 34 having a relay contact 34b of the energizing circuit of the water pump 9 is connected.
a is connected, and when any of these switches 25, 26, and 27, which are arbitrarily turned on, is turned on, the water pump 9 is energized and starts operating.

Next, the operation of this embodiment will be explained with reference to the drawings.

In FIG. 2, when the engine switch 101 is turned ON, the controller 105 is energized, and according to instructions from the controller 105, the main relay 102 and sub-relay 103 are closed, and the burner heater 5 is energized directly from the power source 21. As a result, an excessive current flows through the burner heater 5 and it rapidly generates heat. The controller 1 does not directly apply electricity to the burner heater 5 until the time required for the burner heater 5 to reach the ignition temperature has elapsed.
This is done according to instructions from 05. When the set time has elapsed, the main relay 102 opens in response to an instruction from the controller 105, the sub-relay 103 remains closed, and a stable current is supplied to the burner heater 5 via the protective resistor 104. The set temperature is maintained.

Next, after the preheating lamp (not shown) is turned off, when the engine switch 101 is turned to st, the starter (not shown) rotates and the engine l is driven, and the sub-relay is activated according to instructions from the controller 105. 103 continues to close, and fuel supply relay 206 closes. Therefore, the electromagnetic pump 202 and the electromagnetic valve 203 are energized, and the electromagnetic pump 202 and the electromagnetic valve 203 are energized.
02 is activated and the solenoid valve 203 opens. The fuel sucked up from the fuel tank 205 by the operation of the electromagnetic pump 202 is filtered by the fuel filter 201, a part of which is sent to the burner heater 5 through the electromagnetic valve 203, and the rest is sent to the fuel tank 205 via the regulator 204. return. In this case, the regulator 20 is configured to adjust the fuel supply pressure to the burner heater 5 according to the pressure of intake air introduced into the intake pipe 2.
4 works.

In FIG. 3, the fuel sent to the burner heater 5 attached to the heat exchanger 6 is vaporized in the vaporization section 5b and ignited when it touches the red-hot heat generation section 5a. The intake air introduced into the pipe 2 is taken into the combustion space S of the heat exchanger 6, so that it mixes with this intake air and starts combustion. As shown in the figure, intake air flows in from the intake port 61a, passes through the combustion space S, and flows out from the exhaust port 61b into the intake pipe 2. During this process, it is heated by the combustion heat of the burner heater 5, and this heated intake air is heated by the engine. 1, so
This assists in starting the engine 1.

After starting the engine 1, when the engine switch 101 is turned back from st to ON, as shown in FIG. This is performed continuously, thereby promoting warm-up of the engine 1.

To start the combustion of the burner heater 5, turn the engine switch 101 to 0.
Unless there is an FFL, the process continues according to instructions from the controller 105 for a preset time or until the water temperature is reached.

On the other hand, when the heater switch 23 is turned on after starting the engine 1, electricity is also supplied to the controller 105 via the heater switch 23.

In this case, the cooling water outlet 1a of the engine 1 in FIG.
The detection temperature T of the temperature sensor 11 that detects the water temperature in the vicinity of
and the detected temperature T'+z of the temperature sensor 12 that detects the water temperature near the cooling water outlet of the hot water heater 7.8b are compared by the controller 24 in FIG. 5, and T I I > T
In the case of l t, the relay coil 31a is energized by the instruction from the controller 24, but the relay coils 32a and 33a are not energized, so the relay contact 31b closes and the water pump 9 operates, and the normally closed relay contact 32b
The first on-off valve 10a opens. Therefore, in FIG. 1, the cooling water begins to circulate in the flow indicated by - in the figure, and heat is exchanged in the heat exchanger 6 by the combustion heat of the burner heater 5, and becomes hot water, which is then heated to the front hot water heater 7 and the rear hot water heaters 8a and 8b. After the heat is exchanged and the heat is released, the engine 1
, and follow the normal hot water circuit that enters the heat exchanger 6 from the engine 1.

Conversely, if T l l < T I 2, controller 2
4, the relay coil 31 in FIG.
a.

32a and 33a are energized, so the relay contact 31b closes and the water pump 9 operates, the normally closed relay 32b opens and the first on-off valve 10a closes, and the relay contact 33b closes and the second on-off valve 10a closes. Valve 10b opens. Therefore,
In Figure 1, the cooling water begins to circulate as shown in the figure.
The combustion heat of the burner heater 5 is exchanged with the heat exchanger 6 to become hot water, which is then transferred to the front hot water heater 7 and the rear hot water heater 8.
After heat is exchanged in a and 8b and the heat is released, the engine 1
Follow the bypass hot water circuit that bypasses and enters the heat exchanger 6.

In cold weather, if engine 1 is cold, T
+ + < T t! Therefore, the above engine 1
This is the flow of cooling water that bypasses the flow (the flow shown in the figure).

This is to prevent the heat of the cooling water heated by the combustion heat of the burner heater 5 from dissipating in the engine 1, and when the engine 1 is sufficiently warmed up, the cooling water is heated by the waste heat of the engine 1. This continues until sufficient heating is achieved, that is, until T, >T1□.

In addition, in FIG. 5, when any one of the switch 25 of the front hot water heater 7, the switch 26 of the rear hot water heater 8a, and the switch 27 of the rear hot water heater 8b is turned on, the corresponding fan motor 28, 29, and 30 is turned on. The system activates, blowing warm air into the vehicle interior and heating it.

As mentioned above, combustion in the burner heater 5, which is activated by energizing the controller 105 from the engine switch 101, is performed as follows.
When the set time or the set water temperature is reached, the burner heater 5 is stopped by an instruction from the controller 105, but the combustion of the burner heater 5, which is activated by energizing the controller 105 from the heater switch 23, continues until the heater switch 23 is turned off. This cancellation is done at the discretion of the driver.

Next, in this example, in order to speed up the start-up of heating,
Although the second cooling water channel 13b is provided to bypass the engine 1 and introduce the cooling water heat-exchanged by the hot water heaters 7.8a and 8b into the heat exchanger 6, a normal first cooling water channel 13a that does not bypass the engine 1 is provided. Of course, even if the burner heater 5 is used alone, the heating effect due to the combustion heat of the burner heater 5 can be obtained. In addition, the front hot water heater 7 and the rear hot water heater 8a,
As long as the flow rate of the circulating cooling water is ensured, the pipes 8b do not need to be connected in parallel and may be connected in series.

Further, in this embodiment, the heat exchanger 6 is attached to the intake pipe 2 of the engine 1, but the intake port 61a and the exhaust port 61b, which are provided in the heat exchanger 6 and communicate with the intake pipe 2, are By connecting with long pipes, the heat exchanger 6 can be attached to the engine or vehicle body. The combustion space S of the heat exchanger 6 was formed with star-shaped radiation fins 61c in order to increase the efficiency of heat exchange to the cooling water, but instead of the radiation fins 61c, coil-shaped A cooling water channel formed by a pipe may be provided.

Furthermore, in this embodiment, the fuel supply bag W of the burner heater 5
Although the regulator 204 is used in the 2O0, it is not necessary to use the regulator 204 in a non-turbo engine with a low intake pressure. Note that the burner heater 5 is a heat generating part 5.
Although a structure in which the fuel vaporizer a and the fuel vaporizing section 5b, which also serves as a fuel dripping section, are integrated is used, it is also possible to use a structure in which the heat generating section and the fuel dripping section are completely separate bodies.

In addition, in this embodiment, the burner heater 5 is activated at will by operating the heater switch 23 according to the driver's judgment.
A temperature sensor for detecting water temperature may be provided near the heater switch 2a, and the burner heater 5 may be automatically activated and stopped according to the water temperature until the heater switch 23 is turned off.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

(1) Cooling water is heated by the combustion heat of the burner heater, which assists in starting and warms up the diesel engine, and heats the interior of the vehicle. No additional equipment is required for fuel treatment, and the equipment itself is simple, so the cost of the equipment is significantly reduced.

(2) In addition to heating the cooling water using the combustion heat of the burner heater, which has a large amount of thermal energy, by circulating the cooling water by bypassing the engine, the cooling water is heated more quickly. Heating starts up faster.

(3) In addition, the intake air is heated by the combustion heat of the burner heater generated in the combustion space provided in the heat exchanger, and the cooling water is also heated at the same time, so the thermal energy generated by combustion of the burner heater is effectively used. In addition to this, the device has the functions of heating intake air and heating cooling water, making it more compact.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the combustion type heating device of the present invention, Fig. 2 is a block diagram showing an embodiment of the burner heater system of the same device, and Fig. 3 (a), 0)) FIG. 4 is a sectional view showing an embodiment of the heat exchanger of the device, FIG. 4 is a perspective view showing an example of the device installed in a vehicle, and FIG. 5 is an electric circuit diagram of the main parts of the device. 1...Engine, 2...Intake pipe, 5...Burner heater. 6... Heat exchanger, 7, 8a, 8b... Hot water heater. 10a...first on-off valve, 10b...second on-off valve. 11.12... Temperature sensor, 13a... First cooling channel, 13b... Second cooling channel.

Claims (3)

[Claims] (1) A burner heater that burns fuel and heats the intake air of the diesel engine with the combustion heat; A heat exchanger that exchanges the combustion heat generated by the burner heater with the cooling water of the engine; A combustion type heating device for a vehicle, comprising: a hot water heater disposed in the engine; and a cooling water circulation circuit for the engine that returns to the heat exchanger via the engine. (2) a first cooling water channel extending from the cooling water outlet side of the engine to the cooling water inlet side of the heat exchanger; a first opening/closing valve for opening and closing the first cooling water channel; and a cooling water channel for the engine. a temperature sensor that detects the water temperature on the outlet side; a second cooling water channel that branches from the coolant outlet side of the hot water heater, bypasses the engine, and reaches the coolant inlet side of the heat exchanger; a second on-off valve that opens and closes a cooling water passage; a temperature sensor that detects a water temperature on a cooling water outlet side of the hot water heater; and a temperature sensor that detects a water temperature on a cooling water outlet side of the hot water heater; A control means that opens the first on-off valve and closes the second on-off valve when the water temperature is higher than the water temperature, and closes the first on-off valve and opens the second on-off valve when the temperature is lower than the water temperature. The combustion type heating device for a vehicle according to claim 1, further comprising: . (3) The burner heater is attached to the heat exchanger, and includes a combustion space in which fuel is burned, an intake port and an exhaust port that communicate with the combustion space from the intake pipe of the engine, and combustion heat of the burner heater. The combustion type heating device for a vehicle according to claim 1 or 2, further comprising: an inlet and an outlet for cooling water through which heat is exchanged.