KR100790944B1 - Engine control unit for switching multi-memory - Google Patents

Abstract

The present invention relates to an engine control apparatus for switching a plurality of memories. The apparatus of the present invention enables a key input unit for selecting a desired mode from a driver, a plurality of memories for storing respective engine control values for various modes, and one memory for storing engine control values corresponding to the selected mode. Drive the engine in the selected mode by setting a memory controller for disabling the remaining memory, an engine driver for driving the engine with the engine control value of the selected mode, and storing various engine control values for each mode. It characterized in that it comprises a control unit for controlling each configuration. Therefore, the apparatus of the present invention stores the data in which the operation mode is set using a plurality of memories, and reads the memory in which the data is stored according to the corresponding mode, thereby reading only specific control data, thereby controlling the engine. to provide.

Engine Control, Multi Memory, Switching

Description

Engine control unit for switching multiple memories {Engine control unit for switching multi-memory}

1 is a block diagram showing the components of a conventional engine control apparatus;

2 is a block diagram showing the components of an engine control apparatus according to an embodiment of the present invention;

3 is a timing diagram for explaining the memory control of the present invention;

4 and 5 is an engine control flow chart of the control unit of the present invention.

* Explanation of symbols for main parts of the drawings

21: key input unit 22: control unit

23: memory controller 24: first memory

25: second memory 26: engine drive unit

The present invention relates to an engine control apparatus, and more particularly, to an engine control apparatus for enhancing fuel economy and power.

       In general, an engine of a vehicle is a part generating power to drive an automobile, and energy is obtained by compressing and burning fuel that is sucked into a cylinder of the engine. On the other hand, in order to operate the engine, an air intake apparatus for inhaling air in the cylinder and properly mixing with the fuel is required.

Gasoline injectors that are generally used are fuel pumps and injectors, or injection pumps and injectors replace the functions of the carburetor, and the fuel is metered, atomized and injected into the combustion chamber of the engine.

       The control of the fuel injection can be either electronic or mechanical, and the optimum mixer can be formed and supplied according to the engine's current operating conditions.

       Recently, with the development of the electronics industry, an electronic control apparatus for determining the injection amount of fuel based on the amount of intake air, the temperature of the intake air, the temperature of the cooling water, and the opening amount of the throttle valve has been widely used. In the case of a single point injection system that injects fuel by installing an injector in one place before the throttle valve, or in the case of a multi-point injection system that injects fuel by installing an injector for each cylinder. The injection of is controlled electronically by an electronic control unit (ECU).

       The electronic control unit controls the engine's operating state based on the absolute pressure (MAP) of the intake manifold delivered from the map sensor, the opening of the throttle valve, the engine speed, the coolant temperature and the amount of oxygen contained in the exhaust gas. Determine the amount of fuel, timing of ignition, etc., to form a suitable mixer.

       Here, the map sensor converts the pressure change of the intake manifold into a change in voltage by using a piezoelectric element and transmits the change to the electronic unit.

       In general, a fuel supply device for supplying fuel to an engine of a vehicle, the fuel supply device is to meter and supply the appropriate amount of fuel corresponding to the amount of air sucked in, and then supplied fuel To atomize fine particles so as to be easily burned in a cylinder, and to vaporize the atomized fuel.

       The value of the air-fuel ratio required in terms of engine output and fuel consumption rate is different and it is necessary to change the air-fuel ratio according to the demand. In addition, the allowable range of air-fuel ratio is extremely limited for the purpose of purifying exhaust gas.

       In addition, efforts to reduce the fuel consumption during idling and to improve the engine's maximum power have continued, and as a result, the ratio of the maximum and minimum fuel flows required for the engine operation reaches 60: 1. As a fuel supply device for an automobile gasoline engine, it is important to supply such a wide range of fuel with high accuracy in accordance with demand.

       It is assumed that the mixer for the ignition of the gasoline engine to combust and combust normally is within a limited air-fuel ratio and, moreover, must be gaseous just before ignition in the cylinder.

       That is, in the prior art, the control of the engine is included in the absolute pressure (MAP: Manifold Absolute Pressure) of the intake engine sensed and applied by the electronic control unit, or the opening of the throttle valve, the engine speed, the coolant temperature, and the exhaust gas. Based on the amount of oxygen, the amount of fuel and the timing of ignition are determined and controlled so as to form a mixer suitable for the operating state of the engine.

1 is a block diagram showing the components of a conventional engine control apparatus.

       Referring to FIG. 1, a plurality of mode selection switches 10 and a plurality of mode selection switches 10 respectively corresponding to a plurality of mode selection switches 10 which provide a key input signal for selecting a driving driving state according to a driver's driving pattern or taste. The storage unit 12 sequentially stores the fuel injection amount value, the air amount value, and the ignition timing value for each mode, and detects and selects when a switching signal of one mode selection switch is applied among the plurality of mode selection switches 10. The control unit 11 is configured to read engine control values (fuel injection amount, air amount, ignition timing, etc.) corresponding to the mode from the storage unit 12 and control the engine 13 in accordance with the read engine control values.

       Let's look at the operation of the engine control apparatus of the conventional vehicle configured as described above.

       In FIG. 1, the fuel storage amount, the air amount, the ignition timing and the air-fuel ratio, etc., which are optimal for performing each mode for each mode according to the driver's driving pattern for driving the engine and the driving conditions of the road, are set differently from each other, and then stored. It is stored in advance in (12).

Subsequently, if one of the mode selection switches 10 shown in FIG. 1 is selected and switched by the driver while the vehicle is driving, the controller 11 detects this and analyzes the mode. By analyzing the engine control value corresponding to the selected mode, that is, fuel injection amount, air amount, ignition timing and air-fuel ratio value from the storage unit 12, the fuel injection amount, air amount, ignition timing and air-fuel ratio of the running vehicle engine are controlled. The vehicle will run under the optimum driving conditions desired by the driver.

       If you categorize several modes, you can choose the Comfort Mode when you want to drive at low speed comfortably, the Normal Mode when you want to drive at a moderate speed, and the vehicle at high speed. When driving in a place such as a highway can be classified into a sport mode (Sport Mode) to be selected. Here, the comfort mode may reduce the consumption of fuel by reducing the consumption of fuel and driving the vehicle at a low speed by retarding the ignition timing, and in the sports mode by advancing the ignition timing and increasing the fuel injection amount to speed up the vehicle. The normal mode is to maintain the average driving conditions of the comfort mode and the sport mode.

Since the conventional engine control apparatus needs to store various engine control values according to each mode in a single memory, a large memory must be used, and the engine control values corresponding to the corresponding modes are determined by the storage unit. An error occurred in the device because it had to be read.

Accordingly, an object of the present invention is to provide an engine control apparatus for controlling an engine by switching the memory according to each mode by storing each engine control value in a plurality of memories without using a large memory to solve the above problems. Is in.

Engine control apparatus for switching a plurality of memories according to the present invention for achieving the above object in the engine control device, the key input unit for selecting a desired mode from the driver, and for storing each engine control value for each of the various modes A memory controller for enabling a plurality of memories, one memory for storing engine control values corresponding to the selected mode, and disabling the remaining memories, an engine driver for driving the engine with the engine control values of the selected mode, And a controller configured to control the respective components to drive the engine in the selected mode by setting various engine control values for each mode and storing the engine for each memory.

According to the present invention, the plurality of memories may include a first memory for storing fuel economy control values for improving fuel economy of the engine as engine control values, and a first memory for storing output control values for improving the output of the engine as engine control values. It is characterized by including two memories.

According to the present invention, the memory controller may output a latch signal to the second memory such that the output control value of the second memory is not read in the middle of reading the fuel efficiency control value of the first memory.

According to the present invention, the memory controller converts the level of the latch signal of the second memory when the read completion signal of the fuel consumption control value of the first memory is detected.

According to the present invention, the memory controller may output a latch signal to the first memory such that the engine control value of the first memory is not read in the middle of reading the output control value of the second memory.

According to the present invention, the memory controller converts the level of the latch signal of the first memory when the read completion signal of the output control value of the second memory is detected.

Hereinafter, with reference to the accompanying Figures 2 to 5 will be described in detail a preferred embodiment of the present invention.

2 is a block diagram illustrating components of an engine control apparatus according to an embodiment of the present invention.

Referring to FIG. 2, a key input unit 21 for selecting a desired mode from a driver, a control unit 22 for operating each mode by controlling each component according to the driver's key input, and selectively selecting two memories A memory controller 23 for enabling the vehicle, a first memory 24 for storing fuel efficiency control values for improving the fuel economy of the vehicle, a second memory 25 for storing output control values for improving the output of the vehicle, and And an engine driver 26 for driving the engine according to the engine control value of the controller 22.

Here, the fuel efficiency control value is a value for controlling the engine in order to improve the fuel efficiency of the vehicle, for example, means that a small amount of fuel is set in order to improve the fuel efficiency. In addition, the output control value is a value for controlling the engine in order to improve the output of the vehicle. For example, the output control value means that a large amount of fuel is set in order to improve the output. In addition to the amount of fuel, other values that control the engine can be stored in each memory, classified as either fuel economy or power boost.

In FIG. 2, the control unit 22 sets fuel economy control values (for example, fuel amount ignition timing, air amount, etc.) for increasing fuel economy, stores them in the first memory 24, and output control values for dropping the output. (E.g., fuel amount ignition timing, air amount, etc.) are set and stored in the second memory 25. Although described as two memories here, it will be said that the engine can be controlled by loading the memory for each mode by setting control values in various cases by increasing the number of memories. The memory controller 23 loads the first and second memories 24 and 25 so as to perform timing synchronization when reading data. That is, the controller 22 notifies the memory controller 23 when a key for fuel efficiency mode for increasing fuel economy is input from the key input unit 21. The memory controller 23 outputs a read signal to the first memory 24 so that the controller 22 can read the fuel economy control value in the fuel consumption mode, and outputs a latch signal to the second memory 25. That is, the latch signal prevents the output control value of the second memory 25 from being read while the fuel consumption control value of the first memory 24 is read by the controller 22. When the reading of the fuel efficiency control value of the first memory 24 is completed and the user wants to switch to the output mode, that is, to read the output control value of the second memory 25, the read to the second memory 25 is reversed. A signal is output and a latch signal is output to the first memory 24. Here, the memory control unit 23 reads the output control value of the second memory 25 when a signal for completing the reading of the fuel efficiency control value of the first memory 24 is input. Therefore, when data is read from one of the two memories, data can be prevented from being read from the other one.

2, the memory controller 23 outputs a read signal to the first memory unit 24 and a latch signal to the second memory unit 25 in the fuel consumption mode. . Then, since the control unit 22 reads the fuel efficiency control value of the corresponding address of the first memory 24, the address signal is in a stable state. In this way, the control unit 22 reads out the fuel economy control value of the first memory 24 in accordance with the read signal from the memory control unit 23. When reading from the first memory 24 is completed, the rising edge signal is detected in the read signal. Therefore, when the rising edge signal is detected by the read signal of the first memory 24, the memory controller 23 outputs the read signal for reading the output control value while changing the latch signal to the second memory 25 to the low level. do. Accordingly, the controller 22 may control the engine by storing and selectively reading a control value for enhancing fuel economy or power in each of the two memories.

This series of processes will be described with reference to the flowcharts of FIGS. 4 and 5.

Referring to FIG. 4, when a driver inputs a key for mode selection, a mode selection signal is input (S1). It is determined whether the input mode selection signal is a fuel consumption mode (S2). As a result of the determination, in the fuel consumption mode, the fuel economy control value readout signal is applied to the first memory 24 (S3). At the same time, an output control value latch signal is applied to the second memory 25 (S4). It is determined whether the reading of the fuel consumption control value is completed (S5). If the reading is completed (a rising edge signal is detected), it is determined whether the mode conversion key is input (S6). If the mode conversion key is not input, the engine is controlled to perform fuel economy control according to the read fuel economy control value (S7).

In the case where the mode conversion key is input in step S6 and not in the fuel consumption mode in step S2, the output mode will be described with reference to the flowchart of FIG.

Referring to FIG. 5, it is determined whether the output mode is in operation S11, and in the output mode, an output control value read signal is applied to the second memory 25 in operation S12. At the same time, the fuel economy control value latch signal is applied to the second memory 25 (S13). It is determined whether the reading of the output control value is completed (S14). If the reading is completed (the rising edge signal is detected), it is determined whether the mode conversion key is input (S15). If the mode conversion key is not input, the engine is controlled to perform output control according to the read output control value (S16). On the other hand, when the mode conversion key is input in step S15, the mode returns to the fuel consumption mode of step S3 of FIG.

Therefore, the apparatus of the present invention stores the data in which the operation mode is set using a plurality of memories, and reads the memory in which the data is stored according to the corresponding mode, thereby reading only specific control data, thereby controlling the engine. to provide.

Claims (6)

In the engine control apparatus, A key input unit for selecting a desired mode from the driver; A plurality of memories for storing respective engine control values for various modes; A memory controller for enabling one memory to store an engine control value corresponding to the selected mode and disabling the remaining memory; An engine driver for driving the engine with the engine control value of the selected mode; And And a controller for controlling the respective components to drive the engine in a selected mode by setting the various engine control values for each mode to store the memory for each memory. The plurality of memories may include: a first memory configured to store a fuel efficiency control value for improving fuel economy of an engine as an engine control value; And a second memory configured to store an output control value for improving the output of the engine as an engine control value. delete The method of claim 1, The memory control unit And a latch signal is output to the second memory such that the output control value of the second memory is not read in the middle of reading the fuel economy control value of the first memory. The method of claim 3, wherein The memory control unit And converting the level of the latch signal of the second memory when the read completion signal of the fuel consumption control value of the first memory is detected. The method of claim 1, The memory control unit And a latch signal is output to the first memory such that the engine control value of the first memory is not read in the middle of reading the output control value of the second memory. The method of claim 5, The memory control unit And converting the level of the latch signal of the first memory when the read completion signal of the output control value of the second memory is detected.

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