KR102113658B1 - Apparatus and method for controlling cps and pcv integrated valve of combustion engine - Google Patents

Abstract

The present invention relates to a canister purge solenoid (CPS) and a positive crankcase ventilation (PCV) integral valve control device of an internal combustion engine, comprising: a sensor unit which detects a temperature to determine a cold ignition condition of a vehicle; a control unit which determines whether or not it is the cold ignition condition based on the temperature detected for determining the cold ignition condition by means of the sensor unit; and a CPS and PCV integral valve which is controlled by the control of the control unit to limit the air amount introduced into an intake manifold in the case in which it is determined to be the cold ignition condition. Here, the CPS and PCV integral valve is a valve formed at the middle of an integral hose after the integral hose connects a portion of a CPS and PCV hose being connected to the intake manifold to integrate the same as one. Therefore, the ignition performance during cold starting can be improved.

Description

CPS and PCV integrated valve control device and method of internal combustion engine engine {APPARATUS AND METHOD FOR CONTROLLING CPS AND PCV INTEGRATED VALVE OF COMBUSTION ENGINE}

The present invention relates to a CPS and PCV integrated valve control device and method of an internal combustion engine engine, and more specifically, by electronically configuring a CPS (Canister Purge Solenoid Valve) and PCV (Positive Crankcase Ventilation Valve) as one integrated valve. , CPS and PCV integrated valve control device and method of an internal combustion engine, so as to improve startability during cold start.

Conventional internal combustion engine engines must be equipped with a separate PCV (Positive Crankcase Ventilation Valve) for introducing air (Blow by Gas) into the intake manifold (Intake Manifold), and to the intake manifold according to the operation of the valve There is a disadvantage that a separate modeling technique is required to accurately estimate the amount of inflow air, and in engines using low-gas fuel (eg ethanol fuel), there is no separate control method for cold start at low temperatures (eg, below zero). There was a limit in improving.

In addition, conventionally, a method of using a heated injector (Heated Injector) has been proposed to compensate for the instability (1st firing) during cold start of an engine using a low vaporization fuel. Since another problem may occur, there is a need for a method of improving the startability when cold starting in a nonvolatile fuel through a non-heated injector in a manner that does not use the heating injector as much as possible.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2008-0018428 (2008.08.28. Public, exhaust gas reduction structure when cold start of the vehicle).

According to an aspect of the present invention, the present invention was created to solve the above problems, by electronically controlling a CPS (Canister Purge Solenoid Valve) and PCV (Positive Crankcase Ventilation Valve) as one integrated valve, The object of the present invention is to provide a CPS and PCV integrated valve control device and method for an internal combustion engine engine that can improve startability during cold start.

CPS and PCV integrated valve control device of an internal combustion engine engine according to an aspect of the present invention, a sensor unit for detecting a temperature for determining the cold start condition of the vehicle; A control unit for determining whether a cold start condition is based on the detected temperature for determining the cold start condition detected through the sensor unit; And in the case of the determined cold start condition, CPS and PCV integrated valves that are controlled under the control of the control unit to limit the amount of air flowing into the intake manifold, and the CPS and PCV integrated valves include: CPS (Canister Purge Solenoid) Hose for valve) and PCC (Positive Crankcase Ventilation Valve) is connected to the intake manifold by a single integrated hose and is a valve formed in the middle of the integrated hose.

In the present invention, the CPS and PCV integrated valve is an electronic control valve, characterized in that it comprises a valve controlled in an on-off manner.

In the present invention, the CPS and PCV integrated valve is an electronic control valve, characterized in that it comprises a valve whose closing amount is controlled by a pulse width control method.

In the present invention, the control unit is set to differently set the cold start condition according to the temperature of the cooling water, and is characterized in that it is implemented to control differently the closing amount of the CPS and PCV integrated valve according to the cold start condition.

In the present invention, the control unit, by using the lookup table set according to the relationship between the cooling water temperature and the closed amount of the CPS and PCV integrated valve, the control amount of the CPS and PCV integrated valve to be controlled differently according to the cold start condition It is characterized by controlling.

In the present invention, the control unit is characterized in that it is possible to simultaneously control the closing amount of the throttle control valve while simultaneously controlling the closing amount of the CPS and PCV integrated valves.

CPS and PCV integrated valve control method of an internal combustion engine engine according to another aspect of the present invention, the control unit detecting the temperature for determining the cold start condition of the vehicle; Determining whether the control unit is a cold start condition based on the detected temperature for determining the cold start condition; And when the cold start condition, the control unit to limit the amount of air flowing into the intake manifold through the closed control of the CPS and PCV integrated valve; Including, CPS and PCV integrated valve, CPS (Canister Purge Solenoid Hose for valve) and PCC (Positive Crankcase Ventilation Valve) is connected to the intake manifold by a single integrated hose and is a valve formed in the middle of the integrated hose.

In the present invention, when the cold start condition, when the closed control of the CPS and PCV integrated valve, the control unit is characterized in that it can further perform the closing control for the throttle control valve.

In the present invention, when the cold start condition is not, the control unit CPS and PCV step of turning on the integrated valve; characterized in that it further comprises a.

In the present invention, the control unit is configured to set different cold start conditions according to the cooling water temperature, and is implemented to control differently the closing amount of the CPS and PCV integrated valves according to the cold start conditions.

In the present invention, the control unit, by using the lookup table set according to the relationship between the cooling water temperature and the closed amount of the CPS and PCV integrated valve, the control amount of the CPS and PCV integrated valve to be controlled differently according to the cold start condition It is characterized by controlling.

In the present invention, the CPS and PCV integrated valve is an electronic control valve, characterized in that it comprises any one of a valve controlled by the on-off method, or a closed amount controlled by the pulse width control method.

According to an aspect of the present invention, the present invention is configured by electronically controlling a CPS (Canister Purge Solenoid Valve) and a PCC (Positive Crankcase Ventilation Valve) into one integrated valve, thereby improving startability during cold start.

1 is an exemplary view showing a schematic configuration of a CPS and PCV integrated valve control device of an internal combustion engine engine according to an embodiment of the present invention.
Figure 2 is a flow chart for explaining the CPS and PCV integrated valve control method of the internal combustion engine engine according to the first embodiment of the present invention.
3 is a flowchart for explaining in detail the method for controlling the CPS and PCV integrated valve of the internal combustion engine in FIG. 2.
FIG. 4 is a flowchart for explaining a method of controlling the closing amount stepwise when controlling the CPS and PCV integrated valve of the internal combustion engine in FIG. 3.
Figure 5 is a flow chart for explaining the CPS and PCV integrated valve control method of an internal combustion engine engine according to a second embodiment of the present invention.

Hereinafter, an embodiment of a CPS and PCV integrated valve control device and method of an internal combustion engine engine according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is an exemplary view showing a schematic configuration of a CPS and PCV integrated valve control device of an internal combustion engine engine according to an embodiment of the present invention.

As shown in FIG. 1, the CPS and PCV integrated valve control apparatus of the internal combustion engine engine according to the present embodiment includes a sensor unit 110, a control unit 120, and an integrated valve 130.

The sensor unit 110 includes at least one temperature sensor for temperature detection. For example, the sensor unit 110 is a sensor for detecting temperature, and includes a sensor for detecting the coolant temperature of the vehicle, an outside temperature sensor, and a temperature sensor for detecting a temperature (ie, inside temperature) in the intake manifold. The cooling water temperature (or outside temperature, inside temperature) is detected to determine whether the control unit 120 is in a cold start condition.

The control unit 120 determines whether a cold start condition is based on the coolant temperature (or outside temperature, inside temperature) detected through the sensor unit 110.

Here, the coolant temperature (or the outside temperature, the inside temperature) reflects the ambient temperature, but even if the vehicle is in the off state, it is simply different from the ambient temperature according to the elapsed time after the vehicle is started and then off. Differences can occur. Therefore, in this embodiment, whether or not the cold start condition can be determined using the coolant temperature (or outside temperature, inside temperature).

In addition, the controller 120 may vary the cold start condition according to the cooling water temperature. That is, in this embodiment, depending on the coolant temperature, the off amount of the integrated valve 130 (ie, the closed amount of the integrated valve) or the off-time can be controlled differently, and the coolant temperature and the off amount of the integrated valve (ie, The relationship between the closing amount of the integrated valve (or the off point) can be managed in the form of a look-up table (not shown).

The integrated valve 130 is an electronic valve for controlling the inflow of air using a control method using an on / off type relay or a pulse width modulation (PWM) control method. At this time, the integrated valve 130 is the end of the existing CPS (Canister Purge Solenoid Valve) and PCV (Positive Crankcase Ventilation Valve) hoses (h1, h2) (that is, the part connected to the intake manifold) is one integrated hose It is connected to (h3), the integrated valve 130 is newly formed in the middle of the integrated hose (h3).

When the off (closed) control of the integrated valve 130 is performed, air flowing into the intake manifold through CPS (Canister Purge Solenoid Valve) and PCV (Positive Crankcase Ventilation Valve) hoses h1 and h2 You can block them all at once.

In addition, when the off (closed) control of the integrated valve 130 is performed, since the inflow of fresh air is blocked, the pressure inside the intake manifold and the cylinder is gradually lowered. As described above, when the pressure of the intake manifold is lowered during cold start, the boiling point is lowered, so that the starting point and ignition time of the low-vaporization fuel can be accelerated. That is, it becomes possible to obtain an effect of improving the startability.

The control unit 120 is based on a look-up table set in a cold start condition according to the temperature (or outside temperature, inside temperature) of the cooling water, and the off amount of the integrated valve 130 (that is, the closed amount of the integrated valve) ( Or by controlling the off-time), there is an effect to improve the start-up during cold start of the engine using a low vaporization fuel.

When controlling the off amount (ie, closed amount) (or off point) of the integrated valve 130, the control unit 120 simultaneously controls the off amount (ie, closed amount) (or off point) of the throttle control valve. , It has the effect of improving the startability during cold start of an engine using a low vaporization fuel.

In other words, in the case of a low vaporization engine (that is, an engine using a low vaporization fuel), the controller 120 closes a throttle control valve (not shown) during cold start (eg, ambient temperature of 0 degrees Celsius) and simultaneously performs the present In the example, the newly formed integrated valve 130 is blocked to block air entering the intake manifold.

The throttle control valve (not shown) and the integrated valve 130 are blocked as described above to block the inflow of air flowing into the intake manifold (or suppress the generation of air or limit the backflow), so that the pressure of the intake manifold during cold start is reduced. When it is lowered, the boiling point is lowered, so it is possible to speed up the starting point of ignition and ignition of the low-vaporization fuel, thereby improving the startability.

For example, in this embodiment, the CPS (Canister Purge Solenoid Valve) and the PCV (Positive Crankcase Ventilation Valve) integrated valve 130 are controlled by duty (ie, on / off control) or PWM (pulse width control). , Closing amount control method) Any one that can be used can be used to block the air entering the intake manifold.

Figure 2 is a flow chart for explaining the CPS and PCV integrated valve control method of the internal combustion engine engine according to the first embodiment of the present invention, the startability at the time of cold start of the low vaporization engine (that is, the engine using a low vaporization fuel) It is a flow chart for explaining the integrated valve control method to improve.

As illustrated in FIG. 2, when the driving condition of the vehicle is a purge operating condition, the controller 120 detects the cooling water temperature (or outside temperature, inside temperature) of the vehicle (S101). In addition, the control unit 120 checks whether the specified cooling start condition from the result of detecting the cooling water temperature (or outside temperature, inside temperature) (S102).

For example, the controller 120 checks whether the detected cooling water temperature (or outside temperature, inside temperature) corresponds to a specified cold start condition.

Accordingly, when the specified cold start condition is reached (YES in S102), the controller 120 turns off the newly added CPS and PCV integrated valve 130 in this embodiment (S103). In this case, although not specifically shown in the drawings, the throttle control valve (not shown) may be additionally turned off at the same time as the CPS and PCV integrated valve 130 is turned off.

When cold starting under the pre-specified cold start condition as described above, when the newly formed CPS and PCV integrated valve 130 is closed in this embodiment to block the inflow of air flowing into the intake manifold (that is, the intake manifold), during cold start. As the pressure of the intake manifold is lowered, the boiling point of the fuel is lowered, so that the starting point of ignition and ignition of the low-vaporization fuel can be improved, thereby improving the startability.

3 is a flow chart for explaining in more detail the method of controlling the CPS and PCV integrated valves of the internal combustion engine engine in FIG. 2, the startability of the low vaporization engine (that is, the engine using the low vaporization fuel) is started at cold start. It is a flow chart for explaining in more detail the integrated valve control method for improvement.

As shown in FIG. 3, the controller 120 detects the coolant temperature of the vehicle in a purge operating condition (S101). In addition, the control unit 120 checks whether the specified cold start condition from the result of detecting the coolant temperature (S102).

Accordingly, when the specified cold start condition is reached (YES in S102), the controller 120 turns off the newly added CPS and PCV integrated valve 130 in this embodiment (S103).

On the other hand, when the specified cold start condition has not been reached (No in S102), the controller 120 turns on the newly added CPS and PCV integrated valve 130 in this embodiment (S104).

As described above, when the cold start condition is different from the cold start condition, the newly formed CPS and PCV integrated valve 130 in the present embodiment is closed only in the cold start condition to block the inflow of air flowing into the intake manifold. By doing so, the pressure of the intake manifold is lowered during cold start, thereby lowering the boiling point of the fuel, thereby improving the starting point by allowing the initial width and ignition time of the low vaporization fuel to be accelerated.

FIG. 4 is a flow chart for explaining a method of controlling the closing amount step by step when controlling the CPS and PCV integrated valves of the internal combustion engine engine, in which the low vaporization engine (ie, an engine using low vaporization fuel) is shown in FIG. 3. It is a flow chart for explaining a method of improving startability by adjusting the amount of CPS and PCV integrated valve 130 off (closed amount) according to the cold start condition during cold start.

As illustrated in FIG. 4, the controller 120 detects the coolant temperature (or outside temperature, inside temperature) of the vehicle (S101). In addition, the control unit 120 checks whether the specified cooling start condition from the result of detecting the cooling water temperature (or outside temperature, inside temperature) (S102).

At this time, in this embodiment, the cooling water temperature (or outside temperature, inside temperature) may be divided into predetermined sections (for example, 5 degrees to -5 degrees, -6 degrees to -15 degrees, etc.) to vary the cold starting conditions. .

Accordingly, when the specified cold start condition is reached (YES in S102), the control unit 120 controls the amount of off (ie, the amount of closing) of the newly added CPS and PCV integrated valve 130 in this embodiment (S104). ), Based on a preset integrated valve look-up table (not shown) controls the amount of off (that is, the closed amount) of the CPS and PCV integrated valve 130 (S107). At this time, the off amount (that is, the closed amount) can be controlled by a PWM method.

On the other hand, when the specified cold start condition has not been reached (No in S102), the controller 120 turns on the newly added CPS and PCV integrated valve 130 in this embodiment (S104). However, it is noted that not only the CPS and PCV integrated valve 130 is turned on, but also the amount of opening can be controlled by PWM control.

For example, by modeling the amount of canister purge loading and the amount of blow-by gas loading in the crank case, the amount of opening can be controlled by a PWM method according to vehicle driving conditions.

Thus, in the case of the cold start condition, by controlling the off amount (ie, the amount of closing) of the newly formed CPS and PCV integrated valve 130 in this embodiment in a predetermined manner according to the coolant temperature, the inflow of air flowing into the intake manifold By blocking, and thereby lowering the boiling point of the fuel by lowering the pressure of the intake manifold during cold start, it is possible to advance the starting point of the ignition and ignition of the low vaporization fuel, thereby improving the startability.

5 is a flowchart for explaining a method for controlling the CPS and PCV integrated valve of the internal combustion engine engine according to the second embodiment of the present invention, and is a flowchart for explaining the method for controlling the CPS and PCV integrated valve when cold start is completed. .

As shown in FIG. 5, when the start-up (ie, cold start) is completed (YES in S201), the controller 120 turns on (opens) the newly added CPS and PCV integrated valve 130 in this embodiment. Let (S202).

When the cold start is completed as described above, by opening both the newly formed CPS and PCV integrated valves 130 in this embodiment, the pressure of the intake manifold is normally maintained after starting, so that the engine operation is normally performed thereafter.

As described above, this embodiment newly installs the CPS and PCV integrated valve 130 and then electronically controls the throttle control valve and the CPS and PCV integrated valve 130 during cold start, thereby improving startability during cold start. Make it possible.

The present invention has been described above with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art pertains may have various modifications and other equivalent embodiments. You will understand the point. Therefore, the technical protection scope of the present invention should be defined by the following claims. Also, the implementations described herein can be implemented, for example, as methods or processes, apparatus, software programs, data streams, or signals. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementation of the features discussed may also be implemented in other forms (eg, devices or programs). The device can be implemented with suitable hardware, software and firmware. The method can be implemented in an apparatus, such as a processor, generally referring to a processing device, including, for example, a computer, microprocessor, integrated circuit, or programmable logic device. The processor also includes communication devices such as computers, cell phones, portable / personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

110: sensor unit
120: control unit
130: integrated valve
h1: First hose (CPS hose)
h2: Second hose (PCV hose)
h3: Integrated hose

Claims (12)

A sensor unit that detects a temperature for determining a cold start condition of the vehicle;
A control unit for determining whether a cold start condition is based on the detected temperature for determining the cold start condition detected through the sensor unit; And
In the case of the determined cold start condition, CPS and PCV integrated valves that are controlled under the control of the control unit to limit the amount of air flowing into the intake manifold.
The CPS and PCV integrated valves are connected by an integrated hose in which the hoses for CPS (Canister Purge Solenoid Valve) and PCV (Positive Crankcase Ventilation Valve) are connected to the intake manifold, and in the middle of the integrated hose. Is a valve that is formed,
The control unit,
CPS and PCV integrated valve control device of an internal combustion engine, characterized in that the cold start conditions are set differently according to the coolant temperature, and the closing amount of the CPS and PCV integrated valves can be controlled differently according to the cold start conditions. .
According to claim 1, The CPS and PCV integrated valve,
Electronic control valve, CPS and PCV integrated valve control device of an internal combustion engine, characterized in that it comprises a valve that is controlled on and off.
According to claim 1, The CPS and PCV integrated valve,
Electronic control valve, CPS and PCV integrated valve control device of an internal combustion engine, characterized in that it comprises a valve whose closing amount is controlled by a pulse width control method.
delete According to claim 1, The control unit,
An internal combustion engine engine characterized in that the closed amount of the CPS and PCV integrated valve to be controlled differently according to the cold start condition is controlled by using a lookup table set according to the relationship between the coolant temperature and the closed amount of the CPS and PCV integrated valve. CPS and PCV integrated valve control unit.
According to claim 1, The control unit,
CPS and PCV integrated valve control device of an internal combustion engine engine, characterized in that it is possible to simultaneously control the closing amount of the CPS and PCV integrated valves and to simultaneously close the throttle control valve.
The control unit detects a temperature for determining a cold start condition of the vehicle;
Determining whether the control unit is a cold start condition based on the detected temperature for determining the cold start condition; And
When the cold start condition, the control unit to limit the amount of air flowing into the intake manifold through the closed control of the CPS and PCV integrated valve; includes,
The CPS and PCV integrated valve,
Hose for CPS (Canister Purge Solenoid Valve) and PCV (Positive Crankcase Ventilation Valve) is connected to the intake manifold by one integrated hose and is formed in the middle of the integrated hose.
The control unit,
CPS and PCV integrated valve control method of an internal combustion engine, characterized in that the cold start conditions are set differently according to the coolant temperature, and the closing amount of the CPS and PCV integrated valves can be controlled differently according to the cold start conditions. .
The method of claim 7,
When the cold start condition is reached, when the closed control of the CPS and PCV integrated valve is controlled,
The control unit,
CPS and PCV integrated valve control method of the internal combustion engine engine, characterized in that it can further perform the closing control for the throttle control valve.
The method of claim 7,
When the cold start condition is not reached,
The control unit CPS and PCV step of turning on the integrated valve; CPS and PCV integrated valve control method of an internal combustion engine engine further comprising a.
delete The method of claim 7, wherein the control unit,
An internal combustion engine engine characterized in that the closed amount of the CPS and PCV integrated valve to be controlled differently according to the cold start condition is controlled by using a lookup table set according to the relationship between the coolant temperature and the closed amount of the CPS and PCV integrated valve. CPS and PCV integrated valve control method.
According to claim 7, The CPS and PCV integrated valve,
CPS and PCV integrated valve control method for an internal combustion engine, characterized in that it comprises one of a valve controlled by an on-off method, or a valve controlled by a pulse width control method as an electronic control valve.

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