JPS6192911A - Heater for rider room of automobile - Google Patents

Abstract

PURPOSE:To heighten a room heating effect, by providing a burner at the halfway portion of an intake pipe, providing a fuel control valve in a fuel passage for the burner, and optimally controlling the burner and the fuel control valve depending on the operating condition of an engine and the temperature of air in a heated room. CONSTITUTION:A burner 5 and a heat exchanger 6 are provided halfway on an intake pipe 4 connecting the intake manifold 2 and air cleaner 3 of an inter nal combustion engine 1 to each other. The burner 5 is furnished with an evapo rator 9 for vaporizing fuel supplied from a fuel pump 7 through a fuel control valve 8, and with an igniter 10 for firing the fuel vaporized by the evaporator. The fuel control valve 8 is regulated to an optimal degree of opening by a controller 18 on the basis of the output signals of a generator 19, a blowing switch 20, a cooling water temperature sensor 21, a accelerator sensor 23 and a temperature sensor 29. The evaporator 9 and the igniter 10 are supplied with control signals for performing the vaporization and the firing of the fuel at optimal timing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to 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 it. On the other hand, there is one that burns fuel in a burner independently of the internal combustion engine and uses the combustion heat to heat the room.
This method has been proposed in JP-A No. 180059 and Japanese Utility Model Application Publication No. 57-15958.

(Problems with the conventional technology) In this method of using internal combustion engine cooling water for indoor heating, the temperature of the cooling water rises slowly, so it takes a long time for the heater body to send out hot air. . In addition, with burners that burn fuel, combustion occurs independently when the engine is started, regardless of the operating state of the engine, which requires time and effort to process exhaust gases, which poses problems in terms of environmental pollution. be. In particular, in the technique of the above-mentioned Japanese Utility Model Application Publication No. 55-180059, which permeates the porous material in the intake pipe and vaporizes the fuel for combustion, unstable combustion continues even after the fuel is cut. , a large amount of unburned gas is sucked into the engine, causing smoke and a large amount of toxic gas to be emitted, and it takes time for combustion to start, delaying the start of heating.

An object of the present invention is to solve the above-mentioned problems with conventional heating systems, and to minimize the problem of environmental pollution by controlling the timing of fuel supply and combustion to the burner to optimal values according to engine operating conditions and heating conditions. To provide an automobile heating device capable of rapidly heating a vehicle interior while suppressing heating.

(Means for Solving the Problems) The present invention provides a burner device having a fuel vaporization device and a fuel ignition device in the intake pipe of an engine, and also provides a fuel control valve in the fuel supply passage to the fuel vaporization device. Device,
The fuel ignition system and fuel control valve are controlled by an engine rotation sensor, an accelerator sensor, a cooling water temperature sensor, and optimal operation.

(Function) In the means described in L, when the engine rotation sensor detects that the engine rotation speed is equal to or higher than the set value, and the coolant temperature sensor detects that the coolant temperature is equal to or lower than the set value, Based on these detected data, the plow controller supplies vaporization and ignition currents to the fuel vaporization loading and fuel ignition devices, respectively, and simultaneously opens the fuel control valve. In this way, fuel is supplied, ignited, and ignited. When the heating air temperature detected by the temperature sensor is above the set value, the fuel control valve is closed to reduce the fuel supply, and when it is below the set value, the fuel control valve is closed. , the fuel control valve is opened in the direction of increasing fuel supply on condition that the accelerator lever position is determined by the accelerator sensor to be less than or equal to the set depression amount.

Additionally, if the engine speed is below the set value, the cooling water temperature is above the set value, or the accelerator lever position is above the set depression amount, the controller will
Cut off the ignition current and close the fuel control valve. In this way, the interior of a vehicle can be heated in a short time in a cold region, depending on the engine operating condition and heating air temperature.

(Embodiment) FIG. 1 is a block connection diagram showing an embodiment of a heating device for an automobile according to the present invention. 1 is an internal combustion engine such as a diesel engine or a gasoline engine, and an intake pipe 4 connecting an intake manifold 2 and an air cleaner 3 of this engine is provided with a burner device 5 and a heat exchanger 6 downstream thereof. There is. The burner device 5 includes a vaporizer 9 that vaporizes fuel that passes through a fuel control valve 8 from a fuel pump 7, and an ignition device 10 that ignites the fuel vaporized by the vaporizer 9.

The heat exchanger 6 takes in outside air from an air intake port 11 communicating with the interior of the vehicle that requires heating, removes combustion heat from the outside air to become warm air, and this warm air is supplied to an outlet 13 by a blower 12.

The air outlet 13 opens to an outlet of a cooling water heater core 14 which is separately placed for room heating. Illustrated floor 15
, the air conditioner porator 16 and the hot water passage 17 constitute a cooling water heater device.

Reference numeral 18 denotes a controller, which includes a voltage generated by a generator 19 driven by the engine l, an on/off signal from a blower switch 20, a water temperature signal from a cooling water temperature sensor 21 that detects the temperature of cooling water in the water jacket of the engine, and an accelerator lever 22.
The signal detected by the accelerator sensor (potentiometer) 23 and the output signal of the heating air temperature sensor 29 are input, respectively. And this controller 1
8 controls the fuel control valve 8 to the optimum opening degree in accordance with the various signals mentioned above, and supplies control signals to the vaporization device 9 and the ignition device 10 to perform fuel vaporization and ignition at the optimum timing, respectively. , on/off control of current supply switches 25 and 26 for vaporization and ignition from the battery power source 24. The controller 18 also controls a switch 27 that operates the blower 12 at optimal timing.

The drive control of the fuel control valve 8 is performed by a step motor or the like which is a valve drive device 28.

Next, the effects of the above configuration will be explained.

First, the engine 1 is started by turning on the key of an ignition switch (not shown). This starting of the engine I and the engine rotational speed associated with this starting are detected by the voltage generated by the generator 19, and this detection signal is input to the controller.

When the engine 1 is in an operating state and the controller 18 determines that the manual blower switch (not shown) of the blower 12 is off (step a), the engine speed is adjusted based on the output of the generator 19. If it is determined that the cooling water temperature is below the set value, for example 800 rpm or less (step b), or if it is determined that the cooling water temperature is above the set value, for example 80°C or higher based on the output of the water temperature sensor 21 (step C), the engine 1 Since the warm-up of the engine is sufficient and the heating of the vehicle interior due to the cooling water temperature is sufficient, the fuel control valve 8 is controlled to be fully closed, and the vaporization device 9 and the ignition device lO are fully closed.
(step b).

On the other hand, in step a, it is determined that the blower switch is on, and in step b, it is determined that the engine speed is 80 Orpm or more, and further, in step C, the cooling water temperature is determined to be 80°.
If it is determined that the temperature is lower than C, the controller 18 starts the vaporization process because the warm-up of the engine l is insufficient and the heating of the cabin is insufficient even though the engine l is self-driven. The heating power for vaporization is controlled to be supplied from the battery power supply 24 to the device 9 (step e), and the power for ignition is controlled to be supplied to the ignition device 10 (step f). Also, during this time, the fuel control valve 8 is opened by the valve driving device 28 by an optimum amount depending on the engine speed and the cooling water temperature (step g).

Therefore, by opening the fuel control valve 8, the fuel pump 7
An optimal amount of fuel is supplied to the vaporizer 9 at an optimal timing, and the fuel is heated and vaporized.

This vaporized fuel is ignited and burned by the ignition heat source of the ignition device 10, and becomes high-temperature combustion gas. This combustion gas heats the outside air taken in through the air intake port 11 in the heat exchanger 6, and blows the heated air out to the air outlet 13 by the blower 12 to heat the interior of the vehicle.

After a short period of time has elapsed, the temperature sensor 29 detects the temperature of the heating air at the outlet 13, and if this temperature is determined to be higher than the set value, for example 60'O or higher (step h), the temperature sensor 29 detects the temperature of the heating air at the outlet 13. Control valve 8 is closed by 5% from the current opening to reduce fuel consumption and maintain the appropriate heating air temperature at 60°.
C (step i). Further, when the temperature of the heating air is determined to be 60° C. or less in step h, and the position of the accelerator lever 22 is determined to be, for example, 1/2 or less of the total depression amount (step j).

The fuel control valve 8 is opened 5% more than the current opening to increase the fuel supply amount and maintain an appropriate heating air temperature of 60° C. (step k).

In this way, the controller 18 obtains a predetermined optimal heating air temperature according to the operating status of the engine l,
Controls the amount of fuel supplied and the magnitude and timing of the current flowing to the vaporizer and ignition device.

The reason why the load on the engine l is detected by the accelerator lever 22 rather than the rack lever of the injection pump is because the fuel is combusted upstream of the intake pipe 4, so changes in the load on the engine l can be quickly detected. This is to rapidly supply fuel to the carburetor, thereby preventing an increase in the concentration of black smoke emitted from the engine.

Therefore, if oxygen is consumed by the above-mentioned combustion upstream of the intake pipe 4, the mixture combustion in the engine l will deteriorate when the load increases, so the accelerator lever 22 should be depressed by l/2 (approximately 1/2 of the engine's total load). (corresponding to step 2) In the following cases, it is important to cause the step to perform the following actions.

Further, in step j, when the amount of depression of the accelerator lever becomes 1/2 or more above, the fuel control valve 8 is closed and the current supply to the vaporizer 9 and the ignition device is stopped.

After the operations in steps d and i are completed, the timer maintains the completed state for a certain period of time (step l), and then returns to the initial starting point and resumes the operation in step a.

In this way, by optimizing the operating amount and timing of the fuel control valve 8, vaporizer 9, and ignition device 10, heating using the fuel combustion heat can be quickly performed before heating using the cooling water. Unburnt gas contained in the combustion gas can be combusted within the engine. In this way, environmental deterioration due to exhaust gas can be suppressed.

Note that the heating blower 12 can also be used in common with the blower 15 that constitutes a cooling water heater device.

(Effects of the Invention) As explained above, the automotive heating device according to the present invention includes an eight-pass device in the middle of the intake pipe of the engine, and a fuel control device in the fuel supply passage to the combustion vaporizer of the burner device. By installing valves to allow these burner devices and fuel control valves to operate optimally depending on the operating condition of the engine, the heat generated by burning fuel in the burner device is recovered and used as a heating heat source. It can be used to effectively heat the room immediately after starting the engine.

Furthermore, since the combustion gas discharged from the burner device is taken into the engine and unburned gas is reburned, air pollution can be suppressed. In other words, providing a separate means for treating unburned gas has the advantage of eliminating inconveniences.

[Brief explanation of drawings]

FIG. 1 is a block connection diagram showing an implementation of a heating device for a vehicle according to the present invention, and FIG. 2 is a flowchart similarly explaining the heating operation. ■... Engine, 2... Intake manifold, 3... Air cleaner, 4... Intake pipe, 5... Burner device, 6
... Heat exchanger, 7... Fuel pump, 8... Fuel control valve, 9... Vaporizer, lO... Ignition device, 11.
・・Heating air intake, 12・・Blower motor, 13・
... Air outlet, 14... Heater core, 18... Controller, 19... Generator, 20... Air blower switch, 21... Cooling water temperature sensor, 23... Accelerator sensor.

Claims (2)

[Claims] (1) A burner device is provided in the middle of the intake pipe connected to the engine, a fuel control valve is provided in the fuel supply passage to the burner device, and these burner devices and fuel control valves are controlled according to engine operating conditions and heating. A heating device for an automobile characterized by optimal control according to air temperature. (2) According to claim (1), the burner device and the fuel control valve are optimally controlled according to the respective outputs of a generator linked to the engine, a cooling water temperature sensor, an accelerator sensor, and a heating air temperature sensor. The automotive heating device described.