JP2003247466A - Engine control mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lessen a load applied to an engine for drawing in a mixture and to reduce concentration of air supplied to a combustion chamber of the engine. <P>SOLUTION: An engine control mechanism uses an air conditioner 52 for conditioning air in a cabin and an engine mechanism provided with a plurality of cylinders, each being provided with at least a pair of an intake valve and an exhaust valve, an inlet portion for drawing the mixture into the combustion chamber in the cylinder by way of an intake valve, an exhaust portion for exhausting a combustion gas from the combustion chamber in the cylinder by way of the exhaust valve, and a valve mechanism for driving to open or close the intake and exhaust valves. The control mechanism is capable of sending air to be sent from the air conditioner 52 into the cabin to a carburetor by way of a duct 51. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine control mechanism for activating an engine by sending air from an air conditioner to the engine.

[0002]

2. Description of the Related Art Generally, as shown in FIG.
The air conditioner 110 used in No. 00 is used for the purpose of cleaning the air inside the vehicle 100 and adjusting the temperature, and the air from the air conditioner 110 is used by circulating it inside the vehicle. Further, the engine 120 for the automobile is separated from the air conditioner 110, and the outside air is taken in from an outside air intake port (not shown) to drive the automobile 100, and the carburetor mixes the outside air and gasoline to generate a mixture to generate an engine. It is common to drive the engine 120 into the combustion chamber of 120.

The state near the intake valve of the engine will be described with reference to FIG. In a general engine, outside air is sucked in through an outside air intake port (not shown), and the outside air and gasoline as fuel are mixed by a carburetor or the like, and the mixture of air and gasoline is introduced into the inlet of the air intake portion of the engine 120. Send to section 140. The intake valve 150 in the inlet 140 opens and sends the air-fuel mixture into the combustion chamber 160. Then, the mixture gas is compressed by the piston in the cylinder 170 and then ignited and burned to generate thermal energy, so that the combustion gas generated has a high temperature and a high pressure. This pressure moves the piston, generating mechanical energy.

[0004]

However, in the conventional engine mechanism, in order to drive the engine, it is necessary to suck the outside air as described above, and the energy for that is not a little applied to the load to the engine. Has become. Further, generally, the outside air sucked for driving the engine is mixed with gasoline as fuel in a carburetor or the like to form a mixture. However, sucking from outside the car,
When the outside air to be taken in is generated in the air-fuel mixture by using a carburetor or the like, gasoline that matches the density of air is required. In such a case, the outside air is usually at room temperature and therefore has a low density, and the amount of gasoline required is inevitably large. Therefore, the charging efficiency of the air-fuel mixture in the combustion chamber of the engine also decreases. As a result, the fuel consumption rate of automobiles must be increased.

The present invention has been made in view of the above circumstances, and engine control for reducing the load applied to the engine for sucking the air-fuel mixture and increasing the density of the air supplied to the combustion chamber of the engine. The purpose is to provide a mechanism.

[0006]

In order to achieve the above object, the invention according to claim 1 is provided with an air conditioner for adjusting the air in the vehicle compartment, and at least a pair of an intake valve and an exhaust valve. A plurality of cylinders, an inlet part for guiding the air-fuel mixture into the combustion chamber in the cylinder via an intake valve, and an exhaust part for discharging the combustion gas from the combustion chamber in the cylinder via an exhaust valve. An engine control mechanism using an engine mechanism including a valve mechanism that opens and closes the intake and exhaust valves, for generating the air-fuel mixture from the air sent from the air conditioner into the vehicle interior. In order to send air to the carburetor of the vehicle, a duct is provided between the carburetor and the air outlet provided in the vehicle compartment for sending air from the air conditioner into the vehicle interior. Characterized in that was.

Therefore, according to the invention described in claim 1,
A duct is provided between the air outlet provided in the passenger compartment and the carburetor, so that the air sent from the air conditioner into the passenger compartment can be sent to the carburetor. Therefore, cold air having a high air density can be sent in, so that the air-fuel mixture can be efficiently generated. Further, since the duct is used, the temperature-controlled air can be sent to the carburetor as it is.

Further, the invention according to claim 2 is such that an air conditioner for adjusting the air inside the vehicle compartment, a plurality of cylinders having at least a pair of intake valves and exhaust valves, and a mixture via the intake valves. An inlet part for guiding air into the combustion chamber in the cylinder, an exhaust part for discharging combustion gas from the combustion chamber in the cylinder through an exhaust valve, and a valve mechanism for driving the intake / exhaust valve to open and close. And an engine control mechanism using, wherein the air for generating the air-fuel mixture is added to the air sent from the air conditioner into the vehicle interior, and sent to the carburetor. To do.

Therefore, according to the invention described in claim 2,
The air from the air conditioner can also be sent to the engine (combustion chamber) as a mixture, and the engine itself can absorb the outside air (air outside the passenger compartment) from the outside air suction port through the intake valve. Since it is possible to send the air-fuel mixture to the engine (combustion chamber) by using the air in the vehicle compartment as well, the mixture is sucked into the cylinder of the engine more than the intake of the mixture accompanying the operation of the piston. Since it becomes possible to obtain energy, it becomes possible to improve the charging efficiency in the combustion chamber of the engine.

Furthermore, the invention according to claim 3 is characterized in that, in addition to the structure according to claim 1 or 2, the air sent from the duct to the carburetor is cold air or room temperature air. .

Therefore, according to the invention of claim 3,
Since the air sent from the air conditioner to the engine is cool air or room temperature air, the fuel consumption rate can be suppressed. In other words, by sending cold air from the air conditioner or air at room temperature through the carburetor to the inlet on the combustion chamber, it is possible to send a sufficient amount of air-fuel mixture to the combustion chamber when the intake valve opens. Become. It also becomes possible to reduce the loss of kinetic energy due to the vertical movement of the piston. Furthermore, when the cool air from the air conditioner is sent to the combustion chamber through the carburetor, the air that is sent is cold air, so the density of the air is high, and the fuel that is mixed with the cool air is gasoline. Also, a smaller amount will suffice compared to normal temperature air. As a result, the fuel consumption rate can be suppressed.

Further, the invention according to claim 4 is such that an air conditioner for adjusting the air in the vehicle compartment, a plurality of cylinders having at least a pair of intake valves and exhaust valves, and a mixture via the intake valves. An inlet part for guiding air into the combustion chamber in the cylinder, an exhaust part for discharging combustion gas from the combustion chamber in the cylinder through an exhaust valve, and a valve mechanism for driving the intake / exhaust valve to open and close. And an engine control mechanism using the engine mechanism, wherein air is sent from the air conditioner into the vehicle compartment to a carburetor for generating the air-fuel mixture. A duct is provided between the carburetor and an opening provided between the mechanism and the heating mechanism.

Therefore, according to the invention of claim 4,
Cooling mechanism in the air conditioner (evaporator, etc.)
A duct is provided between the carburetor and the opening provided between the heating mechanism (heat core etc.) and the heating mechanism (heat core etc.) through the cooling mechanism (evaporator etc.) in the air conditioner. It is possible to send the air that is not available directly to the carburetor. Particularly, even when the heating is used in the winter season and the like, the air at room temperature can be sent to the carburetor, so that the air-fuel mixture can be efficiently generated.

The invention described in claim 5 is the same as claim 1.
In addition to the configuration described in any one of 1 to 4, the duct is formed of a heat insulating material.

Therefore, according to the invention described in claim 5,
Since the duct for sending air from the air conditioner to the engine is made of a heat insulating material, it is possible to keep the temperature of the air passing through the duct constant, and to prevent cold air from the air conditioner and normal temperature air. It is possible to move the carburetor and the engine (combustion chamber) without changing the temperature.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Example 1) FIG. 3 is a schematic view showing an air flow in a general air conditioner used in the present invention and a control mechanism of the air conditioner. On the upstream side of the ventilation duct 10, an inside air inlet 12a for letting air inside the vehicle interior 11 into the ventilation duct 10 and an outside air inlet 12b for letting air outside the vehicle interior 11 are provided. The inside air inlet 12a and the outside air inlet 12b are opened / closed by the inside / outside air switching damper 16. The inside / outside air switching damper 16 is driven by the inside / outside air servomotor 14. Then, the inside / outside air switching damper 16
When the inside air inlet 12a is closed, outside air (air from outside) enters the inside of the vehicle compartment 11, and when the inside / outside air switching damper 16 closes the outside air inlet 12b, inside air inside the vehicle compartment 11 is closed. (Air in the vehicle compartment 11) will circulate.

A blower 18 is disposed downstream of the inside / outside air switching damper 16. The blower 18 rotates to guide air from the inside air inlet 12a or the outside air inlet 12b, and blows this air into the vehicle interior 11 through the ventilation duct 10. The blower 18 is drive-controlled by a blower motor 20 driven by a voltage applied from the outside.

An evaporator 22 is arranged downstream of the blower 18. The evaporator 22 constitutes a refrigeration cycle together with a compressor 24, a condenser, a liquid receiver, and an expansion valve (not shown), and the refrigerant flowing inside the evaporator 22 absorbs heat from the surrounding air to cool and dehumidify the surrounding air. It plays a role as an exchange.

An evaporator post-temperature sensor 25 for detecting the temperature of the air after passing through the evaporator 22 is disposed immediately downstream of (adjacent to) the evaporator 22. Then, the magnet clutch 27 connected to the compressor 24 is turned on / off depending on the rear temperature of the evaporator 22 detected by the evaporator post-temperature sensor 25.

A heater core 29 is arranged further downstream of the evaporator 22. This heater core 29 is
The heat exchanger is connected to the engine through a pipe (not shown) and heats air by using engine cooling water flowing through the pipe as a heat source. Further, the amount of engine cooling water flowing into the heater core 29 is adjusted by the opening degree of the water valve 31, so that the air heating capacity of the heater core 29 is adjusted.

The amount of air heated through the heater core 29 and the amount of air passing through the heater core bypass passage 33 are adjusted by the opening degree of the air mix damper 35. The air mix damper 35 is driven by an air mix servomotor 37. A detector 39 is connected to the air mix servomotor 37, and the opening degree of the air mix damper 35 is detected by this.

The air whose temperature has been adjusted by the air mix damper 35 is blown into the vehicle interior 11 from the face air outlets 41a and 41b which are air outlets provided in the vehicle interior 11. Further, the air whose temperature is adjusted by the air mix damper 35 is blown out from a foot outlet in the passenger compartment (not shown) or blown toward a windshield from a defroster outlet provided immediately below the windshield (not shown). Will be done.

From the face outlets 41a and 41b to the passenger compartment 1
The amount of air blown into the inside of No. 1 is adjusted by the opening degree of the outlet switching damper 43 arranged on the air downstream side of the heater core 29. The outlet switching damper 43 is driven by the outlet switching servomotor 45.

The microcomputer 25 controls the inside / outside air servomotor 14, the blower motor 20, the magnet clutch 27, the water valve 31, the air mix servomotor 37, the outlet switching servomotor 45, and the like.

Further, a duct 50 is attached to either one of the face outlets 41a and 41b. In this embodiment, the duct 50 is attached to the face outlet 41a. The air in the passenger compartment 11 via the duct 50 is connected to the engine 60 via a carburetor (not shown) (see FIG. 1). The duct 50 is made of a heat insulating material, and as shown in FIG. 2, an air cleaner 51 is provided in the middle of the duct 50. However, the air cleaner may be provided at another location instead of the middle of the duct 50. For example, an air cleaner is provided in the air conditioner 52, and the air is cleaned in the air conditioner 52 to clean the engine 60.
It is also possible to send to.

Next, with reference to FIG. 4, the flow of the air sent from the air conditioner 52 into the vehicle interior 11 and the air sucked from the outside air suction port to generate the air-fuel mixture sent to the engine 60 is step by step. As a flow chart,
Shown for each automobile part through which air passes. The air conditioner 52 having the above-described configuration is operated by operating an air conditioning switch in an instrument panel (not shown) and the compressor 24 and the evaporator 2 are operated.
Operate 2nd grade. Then, the air whose temperature is adjusted by the evaporator 22 or the like (especially cold air and normal temperature air) is
Face outlets 41a and 41b provided in the vehicle interior 11
The air blown out from the face air outlet 41b circulates in the vehicle compartment 11 and circulates in the vehicle compartment 11. On the other hand, regarding the air blown out from the face outlet 41a, as shown by the arrow in FIG. 2, the face outlet 41a (step S20
From 1) flows through the duct 50 (step S202). The air flowing in the duct 50 enters the air cleaner 51 (step S203) in the duct 50 to be cleaned (see FIG. 2).

The air discharged from the air cleaner 51 passes through the duct 50 (step S204) and enters the carburetor (not shown) (step S205). At this time, the outside air entering from the outside air intake port for the engine (step S208) also enters the carburetor (step S205) through the air cleaner 61 (step S209) and is sent to the engine 60 (see FIG. 1). In the carburetor, the outside air that has entered through the outside air intake port for the engine and the air that is blown out from the face outlet 41a are mixed with gasoline that is a fuel to generate a mixture. At that time, when the air contains cold air, it has a higher density than the air at room temperature. Therefore, the density of gasoline mixed with the cold air also becomes high.
The air-fuel mixture thus mixed enters the engine inlet portion 60a (step S206), and the intake valve 60e
Cylinder 60b (step S2
It goes into 07).

As shown in FIG. 5, the specific operation in the cylinder is performed by the exhaust unit 6 for discharging combustion gas.
The exhaust valve 60f in 0d is closed, the intake valve 60e is opened, and the piston 60c descends from the top dead center to the bottom dead center. As a result, the atmospheric pressure in the cylinder 60b becomes low, and the intake valve 60e opened from the direction shown by the arrow in FIG.
The air-fuel mixture is filled in the cylinder 60b via.
At this time, if the air-fuel mixture contains cool air, the density becomes high, so that the efficiency of filling the combustion chamber can be increased. Further, even if the air-fuel mixture does not include the cool air, the air sent from the air conditioner 52 other than the outside air suction port of the engine is included, so that the piston 60 inside the cylinder 60b is included.
By the descending motion of c, it is possible to fill a larger amount of air-fuel mixture as compared with the conventional descending motion, and it is possible to improve the filling efficiency.

That is, when so-called blown air (air at normal temperature) fed from the air conditioner 52 is used as the air-fuel mixture, the blown air is forcedly fed by the duct 50. Therefore, the amount of air increases as compared with the amount of air taken into the inlet portion 60a when the intake valve is normally open, and the amount of air-fuel mixture in the cylinder 60b can be increased. Therefore, the filling efficiency of the air-fuel mixture can be increased. As a result, it is possible to suck the air-fuel mixture that is more than the lowering operation of the piston 60c into the cylinder 60b, and ultimately it is possible to suppress the mechanical loss of the piston 60c such as wear.

Experiments were carried out on an automobile equipped with the engine control mechanism of the present invention using gasoline as the fuel, and the following table shows the comparison of the fuel consumption rate with the conventional engine.

[0032]

[Table 1]

As is clear from Table 1, the fuel consumption is 7.05 k before the engine control mechanism of the present invention is installed.
m / l (liter), the fuel consumption was 7.763 after the engine control mechanism according to the present invention was installed.
Since it is km / l (liter), it can be seen that the fuel efficiency is significantly improved.

Further, when the engine control mechanism according to the present invention is operated, that is, when the air conditioner 52 is operated to supply cold air or room temperature air to the carburetor, the situation of the temperature change of the air in the duct near the carburetor Is shown in Table 2.

[0035]

[Table 2]

As is clear from Table 2, when the air conditioner 52 is operated and cool air or normal temperature air is sent to the carburetor, the air in the duct near the carburetor is better than when the air conditioner is not operated. It can be seen that the temperature is low. In particular,
It is about 2 ° C to 10 ° C lower. Further, as shown in Table 2, even when the traveling time is long, the temperature tends to be lower when the air conditioner 52 is operated to supply cool air or room temperature air to the carburetor.

As a result, the longer the traveling time, the wider the temperature range in which the temperature of the air inside the duct near the carburetor decreases, which is advantageous in summer when the temperature of the outside air and the air in the engine are high. Further, regarding the shape of the duct, by increasing the wall thickness and shortening the overall length, it becomes difficult to be affected by the outside of the duct, so that the heat insulating effect can be enhanced.

The air conditioning switch in the instrument panel for adjusting the air conditioner in the automobile equipped with the engine control mechanism of the present invention is divided into four stages (strong, medium 1, medium 2, weak) and "strong". About 420 per minute
It is possible to discharge air volume of about 1 l (liter), about 255 l (liter) per minute for medium 1, about 213 l (liter) per minute for medium 2, and about 174 l (liter) per minute for weak. ing.

(Example 2) Also in FIG. 8 showing Example 2, the basic configuration of the air conditioner 52 is the same, and the same members are denoted by the same reference numerals as those in FIG. As a second example, the characteristic points are as shown in FIG.
That is, an opening 36 is provided between the evaporator 22 which is a cooling mechanism and the heat core 29 which is a heating mechanism in the air conditioner 52. With such a configuration, a part of the air sent via the evaporator 22 can be sent directly to the carburetor without passing through the vehicle interior 11.

In particular, in the case of winter when warm air is required in the passenger compartment 11, the air conditioner switch in the instrument panel is operated to operate the heat core 29 and the like so that the face in the passenger compartment 11 can be operated. Warm air is blown from the air outlets 41a and 41b, and the air conditioner 52
Part of the room temperature air or the like that has passed through the evaporator 22 serving as the cooling mechanism can be sent to the opening 36 between the evaporator 22 serving as the cooling mechanism and the heat core 29 serving as the heating mechanism.

Specifically, as shown in FIG. 4, a part of the room temperature air or the like flows through the opening 36 (S201), the duct 50 (step S202), and the air flowing in the duct 50. Is an air cleaner 51 in the duct 50
(Step S203) enters and is cleaned (see FIG. 2). The air discharged from the air cleaner 51 is the duct 50.
After passing through (step S204), the carburettor (not shown) (step S205) is entered. At this time, the outside air that has entered from the outside air intake port for the engine (step S208) also enters the carburetor (step S205) through the air cleaner 61 (step S209) and is sent to the engine 60.

That is, by adopting the configuration of Example 2, warm air can be obtained in the passenger compartment 11, and
It becomes possible to send air at room temperature into the carburetor, and even if warm air is sent into the vehicle interior 11,
It becomes possible to improve the efficiency of the combustion consumption rate of the engine.

[0043]

According to the present invention, by using a duct, air from an air conditioner, particularly cold air, air in a blown state (air at room temperature) can be sent to an engine (combustion chamber) as an air-fuel mixture. In addition to the outside air sucked from the outside air intake port, the air in the vehicle compartment can be used by itself to send it to the engine inlet as a mixture. As a result, the air is forced to be sent from the air conditioner to the engine, which makes it possible to improve the efficiency of filling the air-fuel mixture in the combustion chamber of the engine and improve the efficiency of the combustion consumption rate of the engine. it can. In particular, when the air sent to the carburetor is cool air, the air density becomes high, so that the amount of gasoline, which is fuel mixed with the air containing cold air, is smaller than that of air at room temperature.

Furthermore, the present invention has a structure in which the air conditioner and the engine are simply connected by a single duct,
The present invention can be easily installed without making any complicated modifications for installing it in a vehicle. Then, by feeding air from the air conditioner, it is possible to improve fuel efficiency and to feel acceleration and power up of the vehicle. Further, in the present invention, since the amount of air from the air conditioner affects fuel efficiency and the like, it is necessary to adjust it, but it can be easily adjusted by operating a switch provided in the instrument panel or the like. .

Further, by providing a duct between the carburetor and the opening provided between the cooling mechanism (evaporator or the like) in the air conditioner and the heating mechanism (heat core or the like), the cooling mechanism (evaporator in the air conditioner) is provided. It is possible to directly send a part of the air (normal temperature air or the like) that has not passed through the heating mechanism (heat core or the like) to the carburetor. As a result, it is possible to obtain warm air in the vehicle compartment 11 by using heating in the winter season and to send air at room temperature into the air conditioner, which reduces the combustion consumption rate of the engine. It is possible to improve efficiency.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an engine control mechanism according to the present invention.

FIG. 2 is a schematic view of a duct for connecting an air conditioner and an engine.

FIG. 3 is a schematic view of an air conditioner used in the engine control mechanism according to the present invention.

FIG. 4 is a block diagram showing the flow of air according to the present invention.

FIG. 5 is an explanatory diagram showing an intake process of the engine.

FIG. 6 is a schematic view of an automobile showing a conventional engine control mechanism.

FIG. 7 is an explanatory diagram showing the vicinity of an intake valve of the engine.

FIG. 8 is a schematic view of an air conditioner used in an engine control mechanism according to another example of the present invention.

[Explanation of symbols]

41a Face outlet 50 ducts 52 Air conditioner 60 engine 60a inlet part 60b cylinder 60c piston 60d exhaust section 60e intake valve 60f exhaust valve

Claims (5)

[Claims] 1. An air conditioner for adjusting air in a vehicle compartment, a plurality of cylinders having at least a pair of an intake valve and an exhaust valve, and an air-fuel mixture through an intake valve into a combustion chamber in the cylinder. An inlet portion, an exhaust portion for discharging combustion gas from a combustion chamber in a cylinder through an exhaust valve, and an engine mechanism including a valve mechanism for driving the intake and exhaust valves to open and close, An engine control mechanism used, wherein the air sent from the air conditioner into the vehicle compartment is sent to the carburetor for generating the air-fuel mixture, and the air is sent from the air conditioner into the vehicle compartment. An engine control mechanism characterized in that a duct is provided between the provided air outlet and the carburetor. 2. An air conditioner for adjusting air in a vehicle compartment, a plurality of cylinders having at least a pair of intake valves and exhaust valves, and an air-fuel mixture through an intake valve into a combustion chamber in the cylinders. An inlet portion, an exhaust portion for discharging combustion gas from a combustion chamber in a cylinder through an exhaust valve, and an engine mechanism including a valve mechanism for driving the intake and exhaust valves to open and close, An engine control mechanism used, wherein the air for generating the air-fuel mixture is added to the air sent from the air conditioner into the vehicle interior and then sent to the carburetor. 3. The engine control mechanism according to claim 1, wherein the air sent from the duct to the carburetor is cold air or room temperature air. 4. An air conditioner for adjusting air in a vehicle compartment, a plurality of cylinders having at least a pair of intake valves and exhaust valves, and an intake valve to introduce an air-fuel mixture into a combustion chamber in the cylinders. An inlet portion, an exhaust portion for discharging combustion gas from a combustion chamber in a cylinder through an exhaust valve, and an engine mechanism including a valve mechanism for driving the intake and exhaust valves to open and close, An engine control mechanism used, which is provided between a cooling mechanism and a heating mechanism in the air conditioner in order to send air sent from the air conditioner into a vehicle compartment to a carburetor for generating the air-fuel mixture. An engine control mechanism characterized in that a duct is provided between the opening and the carburetor. 5. The engine control mechanism according to claim 1, wherein the duct is made of a heat insulating material.