JPS592934A - Indicator for optimum shifting position - Google Patents

Abstract

PURPOSE:To make a shifting position sensor unnecessary, by enabling to search a present shifting position through a number of revolutions of an engine and data of a vehicle speed in a titled optimum shifting position indicator. CONSTITUTION:An engine load and an optimum shifting position are caluclated, while a present shifting position at the time of running and the optimum shifting position are compared with each other so as to shift to the optimum shifting position, by providing a car speed detecting sensor 18 for a motor car and an air flow meter 5 detecting a suction air quantity of an engine and applying signals from a number of revolutions sensor 18 and the air flow meter 5, in an optimum shifting positon detector of the motor car with manual speed change gears which is provided with an electronic fuel injecton system. An operation processing circuit 11 generating an instruction signal is provided also. Then an exclusive sensor and a controller having a small data quantity are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optimal shift position indicator for a manual transmission motor vehicle with electronic fuel injection.

The vehicle speed, engine speed, throttle development, fuel consumption, and current shift position are detected while the car is running, and the optimal shift position is determined from these detected data and a pre-memorized data map of optimal shift position in terms of fuel efficiency and data map of equal fuel efficiency. A device has been proposed that not only determines the optimum shift position, but also compares this with the current shift position, and if they do not match, displays the optimum shift position.

However, this kind of conventional display device requires a shift lever position sensor to detect the position from a digital lever, etc., and also requires a large capacity memory in the performance circuit for data processing. Therefore, there are problems in that the configuration of the device becomes complicated, and the large-scale memory requires a large amount of memory, which limits the amount of memory required for other control programs.

The present invention has been made in view of the above points, and by combining the data and sensors of an electronic fuel injection system, the number of dedicated sensors, circuits, and stored data can be reduced, and inappropriate shifts can be avoided. In the case of position, an object of the present invention is to provide an optimum shift position display device that displays the optimum shift position and emits a confirmation sound to instruct the driver.

The purpose of this is to detect the vehicle speed sensor that detects the vehicle speed, the rotation speed sensor that detects the engine rotation speed, and the engine speed sensor in the optimal shift position display device for a manual transmission vehicle equipped with an electronic fuel injection device. Inputs an air flow meter that detects the amount of intake air, a signal from the rotation speed sensor that shows the engine speed, and a signal that shows the amount of intake air from the air flow meter, and calculates the engine load from these data.
The optimum shift position is calculated from a data map showing the optimum shift position on a graph of engine load and engine speed written in advance in a fixed memory, and the optimum shift position for the current driving is calculated from the detected vehicle speed data and engine speed. If they do not match, an arithmetic processing circuit that generates a display command signal indicating the optimal shift position, a display that displays the optimal shift position using the display command signal, and this signal! 1[
This is achieved by an optimum Schiffmill position display device which is equipped with a speaker that emits a 4-way signal.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a schematic diagram of an optimum shift mill position display device incorporated in an electronic fuel injection device and a lever of an automobile engine. First, to explain the outline of the electronic fuel injection system, 1 is a cylinder of the engine, 2 is an exhaust manifold connected to the exhaust boat of the cylinder head, 23 is an intake manifold connected to the intake boat of the cylinder head, A surge tank 3 is formed inside it. The intake tube 24, which is connected to the intake manifold 23 through the surge tank 3, is connected to an air anolometer 5 and an air cleaner 6, which detect the amount of intake air. A sensor 15 is installed. 25 is an air bypass passage that connects the intake tube 24 and the surge tank 3; 9 is a bypass flow control valve that adjusts the flow rate of air flowing through this bypass passage 25; Its opening degree is controlled by an arithmetic processing circuit 11 as shown in FIG. valve,
Reference numeral 17 denotes a throttle angle sensor that detects the opening degree of the throttle valve 4 provided in the intake tube 24. The former is driven and controlled by the arithmetic processing circuit 11, and the latter outputs a signal indicating the throttle opening degree to the arithmetic processing circuit 11. Connected to The 02 sensor 13 is attached to the exhaust manifold 2 and detects the amount of oxygen remaining in the exhaust gas and generates an air-fuel ratio signal, and the 02 sensor 14 is a water temperature sensor that detects the engine cooling water temperature. 11. Reference numeral 10 denotes an exhaust gas recirculation control valve that is connected in communication between the surge tank 3 and the exhaust manifold 2 and is provided in the middle of the exhaust gas recirculation path 26, and is controlled by the arithmetic processing circuit 11. A distributor 12 applies high voltage to each spark plug of the engine at a predetermined timing, and is connected to an ignition coil 22 controlled by the arithmetic processing circuit 11. A rotation speed sensor 1 that rotates in synchronization with the crankshaft of the engine and generates a pulse signal proportional to the rotation.
8 is installed and connected so as to send its detection (No. 8) to the arithmetic processing circuit 11.

The arithmetic processing circuit 11 is composed of a microcomputer as shown in FIG.
, an input boat 31 that inputs the detection signal of the intake temperature sensor 4J15, etc., converts it into a digital signal, and sends it to the CPU 30, and a buffer 1.
) J-Boat 32, the data necessary for calculation processing.
A fixed memory ROM 33 in which data is stored, a RAM 34 for temporary storage, and a backup RAM 35 that retains the memory even after the key switch is turned off are provided, and each circuit is interconnected by a 21 bus 36.

Here, to briefly explain the operation of the electronic fuel injection system, first, the CPU 30 sends data on the intake air amount detected by the air 7-day meter 5 and the engine rotation speed detected by the rotation speed sensor 18 to the CPU 30. -1 to 31, are input through the input/output port 32, and the basic fuel injection amount is fraudulently calculated from these data.

Then, this basic fuel injection amount is corrected according to the intake air temperature detected by the intake air temperature sensor 15 and the cooling water temperature detected by the water temperature sensor 14, and further, the 02 sensor 13
The actual fuel injection amount is determined by correcting the residual oxygen concentration in the exhaust gas detected by . Then, based on this actual fuel injection amount (the arithmetic processing circuit 11 controls the fuel injection valve 8, fuel injection is performed in accordance with the operating state of the engine.Furthermore, when the engine is idle, the detected intake air temperature and cooling water The bypass flow control valve 9 is driven and controlled by the arithmetic processing circuit 11 based on the temperature, and the amount of intake air is controlled.In addition, the rotational speed and crank angle detected by the rotational speed sensor 4J18, and the intake temperature t=free ROM 3 from the intake air temperature detected by '+5
The optimal ignition timing is deceived using the data tube in 3, and based on this, an ignition timing signal is sent to the ignition timing signal 22, and ignition timing is controlled according to the engine speed and intake temperature. be exposed.

Next, the configuration of the optimal shift 1-position display device will be explained.
It is not used in the electronic fuel injection device explained above,
The additional hanging devices are as follows. 16 is a vehicle speed sensor that is attached to the speedometer cable and generates a number of pulses proportional to the vehicle speed, and can also be attached to the output shaft of the manual transmission 117. 20 is a signal that indicates whether or not the clutch is operated. 19 is a clutch switch that generates a vehicle speed signal and a clutch operation signal, and is connected to send the vehicle speed signal and clutch operation signal to the arithmetic processing circuit 11. Reference numeral 19 indicates the optimum position 1 to 2 obtained by the operation process, for example. This is an indicator that displays 4 @ octopus to indicate speed and 3rd gear, and is configured by taking 11-D of 7 segments and division into the ins.1-panel, and 21 indicates the optimum shift position. These are speakers that generate a confirmation sound when the display is displayed on the device 19, and both are connected to the input/output port 32 of the arithmetic processing circuit 11.

In this way, the optimum shift position display device uses the arithmetic processing circuit 11 used in the electronic fuel injection device as the arithmetic processing section.
Further, as input devices such as sensors, an air flow meter 5, a throttle opening sensor 17, and a rotation speed sensor 18 used in an electronic fuel injection device can also be used.

Therefore, the input/output devices dedicated to the R appropriate shift position display device include the vehicle speed sensor 16, clutch switch 20, and display device 1.
9, a speaker 21 which is added to the current electronic fuel injection device, and which is added to the RO of the arithmetic processing circuit 11;
M33 contains a data map showing the relationship between the ratio of engine speed and vehicle speed at each shift 1 position, a data map showing the optimum shift position for the engine load and engine speed, program data necessary for arithmetic processing, and Constants of the arithmetic expressions, etc. are written, and an optimum shift position display device is constructed. In some cases, the vehicle speed sensor is provided in an electronic fuel injection device.

Next, as shown in Fig. 3, 4 control blocks U and 1J-1
- The operations of optimal shift 1 to position table position head will be explained with reference to.

The arithmetic processing circuit 11 starts operating at A and B of the power switch, and after starting the J resin, a predetermined timing signal causes (
For example, by a timer signal that is output once every 60 seconds ()
The processing of this routine is executed, and first, in step 40, the throttle opening degrees are read, and a signal indicating the throttle U1 degree is input from the throttle sensor 17. ~31 to the arithmetic processing circuit 11, and C
I) U 30 stores this data in RAM 3 /
It can be read into l. I-C1 Next, proceed to judgment step 41. Throttle open 1g, o.

It is determined whether or not the slit is O, and if the slit 1~ is closed and the opening degree is 0, it is determined that slYrSJ. If the opening degree 0 is not 0, it will be determined that f'N is 0.1, and then
Proceed to.

In the determination step 42C, it is determined whether or not the clutch switch J20 is turned on by operating the clutch.
If the clutch operation is not performed, it is determined as rNOJ and the process proceeds to step 4°3; if the determination result is rYEsJ, the process proceeds to step 54, where a signal indicating O is output to the display 19 to display O, and this time The processing of this routine is completed.

On the other hand, in step 43, the vehicle speed signal from the vehicle speed sensor 16 is read into the "C performance processing circuit 11" through the input port 31. Then, a judgment step 44 is executed, and whether the read vehicle speed (2) is O or not. If the vehicle speed (2) is O, it is determined that it is rYEsJ, and the process proceeds to step 54, where a signal indicating 0 is output to the display 19 to display O, and the processing of this routine ends.

Note that the processes in steps 41, 42, and 44 are as follows:
The system determines whether the vehicle is decelerating, downshifting, or stopped, and since there is no need to display the optimum shift position in these conditions, separate processes are provided for each.

On the other hand, if the vehicle speed is not 0, the determination result is rNOJ, and then step 45 is executed, and the engine rotation speed N is read from the rotation speed sensor 9'18 via the input/output boat 32, and the engine rotation speed N is read from the rotation speed sensor 9'18 via the input/output boat 32. stored in the area. Ishi-(
, then proceeds to step 4G, where the ratio (N/V) of the vehicle speed V read in step 43 to the engine speed N read in the previous step 45 is falsified, and this derivation value is RAM
34, and the process proceeds to step 47.

In this step, the data map shown in FIG. 4 (in the case of a 4 forward gear type), which is stored in advance in the ROM 33 and shows the relationship between the engine speed and the vehicle speed ratio (N/V) for each shift position, is used. The current shift position is searched using the false N/V data, and this shift position data is temporarily stored in the RAM 34. Then, the process proceeds to step 48, where a detection signal of the intake air amount Q is read from the air flow meter 5 via the input port 31, and the ratio of the engine rotation speed N read in at step 45 to this intake air amount Q. (Q/N), that is, the engine load amount is calculated, and then the process proceeds to step 49.

In step 49, from the data map shown in FIG. 5 representing the optimum shift position corresponding to the engine load and engine speed stored in advance in the ROM 33,
Using the calculated data in step 8, for example, if the engine load Q/N is Ll and the engine speed N is N1, it is 4th gear, and if the same engine speed N1 but the engine load Q/N is Ll, it is 3rd gear. Additionally, the optimum shift position is searched, and this optimum shift position data is temporarily stored in the RAM 34.

Note that the engine load amount obtained in step 48 can be used in place of the basic fuel injection amount extracted during control of the electronic fuel injection device.

Further, the vehicle speed V may be used instead of the engine rotation speed N.

Next, the process proceeds to judgment step 50, where it is judged whether the current shift position S1 searched in step 47 and the optimum shift position S2 searched in step 49 are the same, and if they are the same, the judgment result is Became rYEsJ,
Next, the process proceeds to step 51, where a display command signal for shift 1 is outputted from the arithmetic processing circuit 11 to the display 19 via the input/output board 32, and a number indicating the current shift position S1 is displayed on the display 19. Ru. On the other hand, if they are not the same, the determination result is "NO", and step 52 is then executed, and display command signals for the optimum shift 1 to position S2 are output to the display 19 via the input/output boat 32. , a number indicating the optimum shift position @S2 is displayed on the display 19, and then in step 53
Proceed to.

In step 53, a signal for generating a confirmation sound is output from the input/output port 32 to the speaker 21, and the speaker 21 emits, for example, an oscillation sound. As a result, the driver is prompted to perform a shift operation from the current shift position if S + to the displayed optimal shift position S2, and the current shift position display process ends.

If the tone of the confirmation sound emitted from the speaker 21 is different depending on whether to shift up or down, the driver can know whether to shift up or down without looking at the display 19. It becomes possible to judge whether the operation should be performed. Then, the same process is repeated at a predetermined interval, and while driving, the throttle opening is not at O and the latch operation is The optimum shift position is always displayed on the display 19 together with a confirmation sound to the driver when the shift position is not being performed.

Therefore, the driver can recognize the best shift position in terms of fuel efficiency while driving arbitrarily, and by executing this, for example, compared to a vehicle without this device, the driver can
It is possible to reduce fuel consumption by approximately 0%.

As described above, according to the optimum shift position display device of the present invention, the current shift position is searched using the data map stored in the memory based on the engine speed and vehicle speed data, so a shift position sensor is not required. Various sensors for electronic fuel injection devices installed in engines,
It can also be used as the derivation processing circuit and the derivation processing circuit, and the number of dedicated sensors and circuits can be reduced. - Also, when the optimal shift position is displayed, a confirmation sound can be emitted to prompt the driver to shift to the optimal shift 1 position, making it possible to proactively reduce fuel consumption.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an electronic fuel injection device, an optimal shift position display device, and an engine according to an embodiment of the present invention, FIG. 2 is a book diagram of the same device, and FIG. 3 is a diagram of an optimal shift position display device. 4 shows a data map for the current shift position V-ji, and FIG. 5 shows a data map for the optimum shift I and position Z. 5... Air flow meter 11... Actual processing circuit 16... Vehicle speed sensor 17... Throttle opening sensor 18... Rotational speed sensor 19... Indicator 21... Speaker agent Patent attorney Tsutomu Adachi - 111 2 111 Figure 3 Figure 4 Text small N Figure 5 Nt - 佽N Procedural amendment (acid) March 1, Spring 1984 Mr. Kazuo Wakasugi, Commissioner of the Patent Office 1. Display outside the vehicle Patent Application No. 11014 of 1982 February 2. Optimum shift of the title of the invention (17 @ Display Display 3. Relationship with the case of the person making the amendment Patent Applicant Address: Mr. 1 Toyota-cho, Toyota City, Aichi Prefecture) Name (320) H3 Automobile Co., Ltd. Representative Masatoshi Morita 4, Agent 460 Address July 5, 912 Nishiki 2-chome, Naka-ku, Nagoya Date of amendment order Voluntary order 6 Increased by supplement 1 Number of inventions that include J: None 7, Subject of amendment: "Detailed description of the invention" column and drawings (2) In the specification box, page 10, lines 16 to 19, [If the degree is O, ...Proceed to step 54.''If 1 degree is not OJ, the judgment is l' N OJ. Next, the process proceeds to judgment step 42, and if the throttle opening θ is O, rYESJ is determined. is determined, the process proceeds to step 54, outputs a signal indicating O to the display 19, and
The display is performed and the processing of this routine is completed. ” he corrected. Figure 3

Claims (1)

[Claims] Equipped with an electronic fuel injection device that controls the fuel injection amount using an arithmetic processing circuit based on data on the intake air amount detected by the air 70 meter and the engine speed detected by the rotation speed sensor, and detects the vehicle speed. The current shift position is searched using a vehicle speed sensor and a data map stored in memory based on the engine speed and vehicle speed, and the engine load amount is calculated from the engine speed and intake air amount data. search for the optimum shift position using a data map stored in memory based on the amount and the engine speed, compare the current shift position and the optimum shift position, and when there is a difference, shift position operation to the optimum shift position. The optimum shift system is characterized by having an arithmetic processing circuit that outputs a display command signal to indicate an instruction, and a speaker that generates a confirmation sound at the same time as a display that receives the display command signal and displays the instructed shift position. Position display device.