KR20030080478A - Heating control system of diesel engine type vehicle and control method thereof - Google Patents

Abstract

PURPOSE: An apparatus for controlling heating of a diesel vehicle and a control method of the same are provided to allow rapid heating almost without power consumption of a battery. CONSTITUTION: An apparatus includes a turbocharger(T) heating introduced fresh air with exhaust gas to supply to an engine(E); a heater(H) connected to a coolant discharge line(WO) to heat a car room; and a heating unit heating coolant introduced into the heater. The heating unit comprises a bypass line(1) connected between the turbocharger and the coolant discharge line through a joint(2); an outside air temperature sensor(3) measuring outdoor temperature; a coolant temperature sensor(4) placed on the coolant discharge line to measure temperature of coolant discharged from the engine; an actuator(5) placed on the bypass line to open and close a channel of coolant introduced into the turbocharger; and a controller(6) receiving signal of the outside air temperature sensor and the coolant temperature sensor to turn on/off the actuator following on built-in program.

Description

Heating control system and control method of diesel engine vehicle {Heating control system of diesel engine type vehicle and control method

The present invention relates to a heating control device for a diesel engine vehicle and a control method thereof, and more particularly, to a heating control device for a diesel engine vehicle capable of circulating coolant discharged from an engine to a supercharger and heating the exhaust gas, and a control thereof. It is about a method.

In general, a diesel engine has a major structure of an engine that converts thermal energy into mechanical energy, but is different from a gasoline engine, but a fuel supply and combustion process is different. When only the air is sucked in the intake stroke and compressed at a high compression ratio (15 to 22: 1), a high compression heat of 500 to 600 ° C is generated, and when the fuel is injected through the injection nozzle, it is compression ignition (self ignition). .

In determining the combustion state, such a diesel engine has a major influence not only on the shape of the combustion chamber but also on the timing, duration, injection amount, and injection state, that is, the spraying distance, penetration, distribution, and degree of atomization in the combustion chamber. Optimal control of the injection amount and the injection timing is the most important factor in order to control this, using a mechanical method and an electronic control method using a microcomputer that is used in recent years.

However, such a diesel engine has a higher difference in engine temperature from a gasoline engine due to its high efficiency, and thus, in a cold weather such as winter, the diesel engine may have a low temperature for a longer time, which causes Since the temperature of the circulating coolant is also kept at a low temperature, it is not easy to increase the temperature of the heater device that uses the coolant to warm the air in the cabin, and there is a disadvantage of waiting a long time for proper heating performance. do.

Accordingly, in order to compensate for this disadvantage of the heating performance, the cooling water heater (glow plug) is mounted in the cooling water passage and operated using an on / off switch, but the use of the cooling water heating heater consumes power and Degradation of starting ability, that is, a large voltage consumption is brought about by the coolant heating heater operated at a low battery voltage, and thus there is a disadvantage of including a problem of generating an engine stall after the engine is started.

Therefore, the present invention has been invented in view of the above. When the cooling water temperature is low, the cooling water flowing into the heater is bypassed by a supercharger and heated above a predetermined temperature, thereby providing fast heating performance without almost using power of the battery. Has its purpose.

The present invention for achieving the above object is a heater for heating the interior of the vehicle connected to the supercharger for heating the incoming air to the engine by using the exhaust gas and the cooling water discharge line for discharging the coolant from the engine and the heater It consists of a heating means for heating the incoming cooling water to a constant temperature through the exhaust gas passing through the supercharger, the heating means is a actuator provided on the bypass line for introducing the cooling water to the heater through the supercharger to the signal of the temperature sensor It is characterized by consisting of a controller for receiving and controlling.

In addition, the present invention, after determining whether the controller satisfies the set value of the vehicle outdoor temperature and the coolant temperature discharged from the engine, by turning on the actuator provided on the bypass line branched from the coolant discharge line during the operation of the heater and passing the coolant through the supercharger After supplying to the heater, if the coolant temperature exceeds the set value, the actuator is turned off so that the coolant is introduced into the heater only through the coolant discharge line.

1 is a block diagram of a heating control device for a diesel engine vehicle according to the present invention

2 is a flowchart illustrating a heating control method of a diesel engine vehicle.

<Description of Symbols for Main Parts of Drawings>

1: bypass line 2: joint

3: outside temperature sensor 4: cooling water temperature sensor

5: actuator 6: controller

E: Engine H: Heater

WI: Cooling water inlet line WO: Cooling water outlet line

T: Supercharger

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a block diagram of a heating control device for a diesel engine vehicle according to the present invention, the present invention is a supercharger (T) for supplying the fresh air to the engine (E) by using the exhaust gas and the engine ( E) is connected to a cooling water discharge line (WO) for discharging the cooling water in the heater (H) for heating the vehicle interior and a heating means for heating the cooling water flowing into the heater (H) to a predetermined temperature, the heating means The bypass line (1) connected to the cooling water discharge line (WO) via the joint (2) via the supercharger (T), the outside air temperature sensor (3) for measuring the temperature of the outside of the vehicle, the cooling water discharge line (WO) Coolant temperature sensor 4 for measuring the coolant temperature discharged from the engine and the actuator (5) provided on the bypass line (1) to open and close the coolant passage flowing into the supercharger (T) and Receives signals from the sensors 3 and 4 to the built-in program La is made to the actuator (5) to an on (On) · off (Off) the controller (6) to.

Here, the controller 6 may use a general controller such as a microcomputer, but it is of course preferable to use an ECU (Engine Control Unit).

Unexplained reference numeral WI is a coolant inflow line for supplying coolant from the heater (H) to the engine (E).

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

According to the characteristics of the diesel engine, the low-temperature condition lasts for a longer time, so that the cooling water is heated to compensate for the deterioration of the heating performance due to the low cooling water temperature when the heater is operated at a low outside temperature such as a cold winter season. After that, it will be described in detail with reference to Figure 2 showing a flow chart for the heating control method of the diesel engine vehicle.

That is, the present invention is a controller 6 receiving the coolant temperature Tw discharged from the coolant discharge line WO through the vehicle outdoor temperature To and the coolant temperature sensor 4 measured by the outside air temperature sensor 3. If the outdoor temperature (To) is less than or equal to 5 ° C and the cooling water temperature (Tw) is determined to be less than or equal to 60 ° C, the heater H is then detected.

Then, the controller 6 is on the bypass line (1) branched from the cooling water discharge line (WO) to bypass the cooling water supplied to the heater (H) confirmed to be in operation to the supercharger (T). Actuator (5) provided in the on (On) and, accordingly, a part of the flow rate of the cooling water discharged from the cooling water discharge line (WO) is heated by the exhaust gas while passing through the supercharger (T), the bypass Through the line (1) again flows into the cooling water discharge line (WO) is supplied to the heater (H).

Thereafter, when the controller 6 continuously measuring the coolant temperature Tw discharged from the coolant discharge line WO through the coolant temperature sensor 4 determines that the coolant temperature Tw is 80 ° C. or higher, The actuator 5 which opens the cooling water of the pass line 1 is turned off to block the flow path formed on the bypass line 1, and the coolant is heated to the heater H only through the cooling water discharge line WO. Will be introduced.

As described above, according to the present invention, the low-cooling water supplied from the engine to the heater is bypassed by a supercharger that warms the incoming air with the exhaust gas and supplies it to the engine to be heated to a predetermined temperature and then supplied to the heater that heats the vehicle interior. Thus, there is no effect of power consumption of the vehicle battery, it is possible to quickly heat the vehicle interior without the use of a separate coolant heating device.

Claims (5)

A heater (H) connected to a supercharger (T) that warms the incoming fresh air using exhaust gas and supplies it to the engine (E), and a cooling water discharge line (WO) that discharges the coolant from the engine (E), and heats the vehicle interior; Heating control device for a diesel engine vehicle consisting of a heating means for heating the cooling water flowing into the heater (H) to a predetermined temperature through the exhaust gas passing through the supercharger (T). According to claim 1, wherein the heating means is a bypass line (1) connected to the cooling water discharge line (WO) via a supercharger (T) via a joint (2), and the outside air temperature sensor for measuring the temperature of the outside of the vehicle (3), a coolant temperature sensor 4 provided in the coolant discharge line WO to measure the coolant temperature discharged from the engine, and a coolant passage provided on the bypass line 1 and introduced into the supercharger T; A diesel engine comprising an actuator 5 for opening and closing, and a controller 6 for receiving the signals from the sensors 3 and 4 and turning the actuator 5 on and off according to a built-in program. Vehicle heating control device. After the controller 6 determines whether the set value of the vehicle outdoor temperature To and the coolant temperature Tw discharged from the engine is satisfied, the bypass line 1 branched from the coolant discharge line WO when the heater H is operated. Turn on the actuator (5) provided on the top to supply the coolant to the heater (H) via the supercharger (T), and if the coolant temperature (Tw) exceeds the set value, turns off the actuator (5) to cool the water discharge line Heating control method of a diesel engine vehicle in which the coolant is introduced into the heater (H) only through the (WO). 4. The heating control method of a diesel engine vehicle according to claim 3, wherein the signal for turning on the actuator (5) is when the outdoor temperature (To) is 5 ° C or less and the coolant temperature (Tw) is 60 ° C or less. 4. The heating control method of a diesel engine vehicle according to claim 3, wherein the actuator (5) is turned off when the coolant temperature (Tw) is 80 deg.