JPS6114428A - Blowing controller for compressed air to internal-combustion engine - Google Patents

Abstract

PURPOSE:To discriminate a starting state in a car so accurately as well as to make compressed air in a proper quantity get blown in a conformable manner, by opening a solenoid valve of an air tank at a time when air pressure in the air tank is more than the specified value and an engine speed is less than the specified value. CONSTITUTION:A solenoid valve 21 is opened in the following conditions that air pressure in an air tank 22 is above 5kg/cm<2>, a shift gear switch 29 is closed, a revolving speed of an engine 10 is below 1,000r.p.m. an accelerator switch 36 is closed and within 5 seconds since a clutch switch 38 has closed, by means of a microcomputer 25, whereby air is blown in a suction passage 15b. As a result, the engine 10 quickly follows up operation of an accelerator pedal 35 without entailing any responsive delay in time of starting acceleration, thus starting characteristics in a car are improvable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an internal combustion engine, particularly a device for supercharging intake air by blowing compressed air from an air tank into an internal combustion engine on the side of an exhaust turbine supercharger. More specifically, the present invention relates to a device for controlling the blowing of compressed air.

[Prior Art] When a vehicle starts, there is a phenomenon in which intake air is insufficient compared to the fuel supplied to the combustion chamber of an internal combustion engine. This phenomenon is particularly noticeable in internal combustion engines equipped with an exhaust turbine supercharger, resulting in poor acceleration response. As one of the improvement measures for this purpose, there is a conventionally known technique to increase the volumetric efficiency of the engine by blowing compressed air into the intake passage or combustion chamber of the engine from an air tank provided separately from the engine. But 1. Conventionally, this improvement measure has not been effectively utilized because there is no device that appropriately determines when to blow air, particularly when the vehicle starts, and adjusts the amount of air blowing to an appropriate amount.

[Object of the invention] The present invention provides a device that accurately determines the starting state of a vehicle equipped with an internal combustion engine that supercharges intake air by blowing compressed air from an air tank, and blows an appropriate amount of compressed air into the vehicle. With the goal.

[Features of the Invention] The present invention provides a transmission gear switch that closes when the transmission gear position is switched to first speed or second speed, and an accelerator switch that closes when the accelerator pedal is depressed by a predetermined amount or more. A clutch switch that closes when the clutch pedal is pressed back and the clutch engages, and a pressure that detects the air pressure in the air tank, which is the source of compressed air that is blown into the intake passage or combustion chamber of an internal combustion engine, as an electrical signal. a rotation sensor that detects the rotational speed of the engine as an electrical signal; and a timer that sends out an output signal for a predetermined period of time after receiving a clutch switch closing signal; and ■−
When both of the clutch switches mentioned above are closed, and the pressure distribution sensor detects and outputs an air pressure above a predetermined value, and the rotation sensor detects and outputs an engine rotation speed below a predetermined value, the air tank The electromagnetic valve is controlled to open only for the predetermined time.

[Example] Next, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, the internal combustion engine 10 of this embodiment includes an exhaust turbine supercharger 11, and the supercharger 11 is composed of a compressor 12 and an exhaust turbine 13. Intake air from the engine IO enters the compressor 12 through an intake passage 15a located on the downstream side of the compressor 12, and is introduced into the intake manifold 16 through an intake passage 15b downstream of the compressor 12. The exhaust gas from the engine 10 is guided to the exhaust passage 18a of the exhaust turbine L flow through the air grab manifold 17, and after driving the turbine 13, is exhausted to the downstream exhaust passage 18b of the gas metabin.

A blowing nozzle 20 is disposed in the intake passage 15b so as to face the intake manifold 16. An air tank 22 is connected to this nozzle 20 via a solenoid valve 21.

The feature of this embodiment lies in the device that controls the opening and closing of this solenoid valve 21.

That is, the air tank 22 is provided with a pressure sensor 23 that detects the air pressure in the tank 22 as an electrical signal, and this pressure sensor 23 is connected to an input interface 26 of a microcomputer 25 via an AD converter 24. Also, the transmission 28 of the engine 10 has a gear position of 1st speed or 2nd speed! , lJ is provided. This gear change switch 29
is connected to the input interface 26. Further, a rotation sensor 3 is located near the front end of the crankshaft 31 of the engine 10.
2 is provided. This rotation sensor 32 is connected to the human power interface 26 .

Further, the accelerator pedal 35 of this vehicle is provided with an accelerator switch 36 that closes when the accelerator pedal 35 is depressed by a predetermined amount or more, and the clutch pedal 37 is provided with an accelerator switch 36 that closes when the accelerator pedal 35 is depressed by a predetermined amount or more, and the clutch pedal 37 is provided with an accelerator switch 36 that closes when the accelerator pedal 35 is depressed by a predetermined amount or more. A clutch switch 38 is provided which closes when the human power interface 2
Connected to 6.

A CPU 40 is connected to this human power interface 26 . A memory 41 is connected to this CPU 40. This memory 41 contains the control procedure program of the CPU 40 as well as the air pressure in the air tank 22, the position of the transmission gear, the rotational speed of the engine lO, the opening and closing of the accelerator switch 36 and the clamper switch 38, and The control^1 data for turning on the valve 21 is stored in advance. This C
The output of the PU 40 is connected to the output interface 42 and the amplifier 4.
3 to the control input of the solenoid valve 21. 44
(This is a timer built into the microcomputer 25. In this example, the solenoid valve 21 is a timer built into the microcomputer 25.
5, i, 1',) The air pressure in the air tank 22 is 5 Kg/
cm2 or more, (?) the speed change gear switch 29 is closed, and 3) the rotational speed of the engine 10 is 1100 rpm or more, and 14) the accelerator switch 36 is closed. It is set in advance to open only when six conditions are met: the clutch switch 37 is closed, and the clutch switch 37 is closed within 5 seconds. Set. - The above ■, (ㅅ and (Φl)) are the conditions for detecting the starting state of the vehicle, and the above (1),
(The light and the (mountain are k) are mainly the conditions 1 for determining the air blowing amount.

The operation of the embodiment apparatus having such a configuration will be explained based on the configuration diagram in FIG. 1 and the flowchart in FIG. 2.

First, the microcomputer 25 sets the output signal y from the output interface 42 to "o" and turns the solenoid valve 2 on.
Close 1. Next, the signal of the AD converter 24 that is manually input to the manual interface 26; The signal '-+x2 from the multi-speed gear switch 29, the signal X3 from the sensor 32 at 117j. Trust from accelerator switch 36% X 4
and reads the signal X5 from the Clarati Sweet 37.

Next, when the conditions from ■ to ■ above are satisfied, the output signal y is set to "°1" and the power switch 21 is opened. After 5 seconds have elapsed, the output signal y is set to "o"t. Strain, solenoid valve 2
Close 1. Note that if the conditions (1) and (-) are not satisfied, the output signal y is set to "'O" and the solenoid valve 21
Close.

As a result, the microcomputer 25 performs the above (1) to
While the condition (6') is satisfied, the solenoid valve 21 is opened and the necessary 3B of compressed air from the air tank 22 is blown from the blow nozzle 20 into the intake passage 1.5b. As a result, the engine 10 can quickly follow the depression of the accelerator pedal 35 without causing a response delay when the exhaust turbine supercharger 11 starts accelerating, thereby improving the starting performance of the vehicle.

Although the I-memory uses an internal combustion engine with an exhaust turbine supercharger as an example, it can also be used in a turbo-less engine that suffers from a lack of intake air when starting.

Further, the numerical values for the opening conditions of the electromagnetic valve shown above are merely examples, and these numbers can be changed as appropriate depending on the characteristics of the engine, the amount of bleed air, and the like.

Further, in the above example, the control circuit for the electromagnetic valve is shown as a progeram rosinc circuit, but the control circuit is not limited to this, and may be constructed as a wire trosink circuit.

[Effects of the Invention] As described below-1-, according to the present invention, when the transmission gear position is switched to first or second gear, the accelerator pedal is depressed by a predetermined amount or more, and the clutch pedal is depressed When it is returned, the flange will meet and the air pressure in the air tank for air blowing will exceed the redundant value.1. When the rotational speed of the engine is below a predetermined value, by controlling 911 the valve of the air tank to open for a predetermined time, the starting state of the vehicle can be accurately determined. Compressed air of color -FH'i can be blown.

In particular, if this device is used in an exhaust turbine supercharger I-1 internal combustion engine, IA- during startup acceleration of the exhaust turbine supercharger;
This has the effect of quickly following the depression of the accelerator pedal without causing any hesitation, thereby improving the starting performance of the vehicle.

4 Explanation of the drawing FIG. 151 is a configuration diagram of a control device according to an embodiment of the present invention.

The 214th is the microcomputer's flow (=1
・.

10. Internal combustion engine, 11: Extraction turbine supercharger.

21: ``City magnet block'', 22: Air tank, 23: Pressure sensor, 25. Controller (microcomputer), 2
8: Transmission, 29: Shift gear switch, 32: Rotation sensor, 35: Accelerator pedal, 36: Acjars inch,
37: Clamp pedal, 38: Clutch switch, 4
4: Timer.

Special 1t9 Junjin Hino Motors Subaru Co., Ltd. -〇 Ichiro Confucianism ゝ〉、　〜0 Figure 2

Claims (2)

[Claims] (1) For vehicles equipped with an internal combustion engine in which compressed air is blown from an air tank via a solenoid valve to supercharge the intake air, a gear shift that closes when the gear position is switched to first or second gear. A gear switch, an accelerator switch that closes when the accelerator pedal is depressed more than a predetermined amount, a clutch switch that closes when the clutch pedal is depressed and the clutch engages, and the air pressure in the air tank mentioned above is detected as an electrical signal. a rotation sensor that detects the rotational speed of the engine as an electrical signal; and a timer that sends out an output signal for a predetermined period of time after receiving a closing signal of the clutch switch; When both the accelerator switch and the clutch switch are closed, the pressure sensor detects and outputs an air pressure of a predetermined value or more, and the rotation sensor detects and outputs an engine rotation speed of a predetermined value or less, the electromagnetic A control device for blowing compressed air into an internal combustion engine, comprising a controller that opens a valve for the predetermined period of time. (2) The compressed air blowing control device for an internal combustion engine according to claim 1, wherein the internal combustion engine is an internal combustion engine equipped with an exhaust turbine supercharger.