JPS60113039A - Automatic engine stop-restart control device - Google Patents

Abstract

PURPOSE:To prevent a room lamp from flickering, by installing an electronic control unit in the above captioned device for an urban service line bus, while detecting a working state of lighting and, when such the lighting as being large in watt consumption is used, keeping an engine from its automatic stop. CONSTITUTION:An automatic engine stop-restart control device is provided with an electronic control unit 1 which transmits such a signal as making an engine automatically stop or restart, to an engine stopper or a starter when a signal out of a sensor detecting a performance state of every part of a car accords with the specified condition. The electronic control unit 1 is provided with a warning device giving an alarm when the sensor signal or the performance state of the engine and the others is unconformable with the specified condition, and a display unit which indicates all sorts of information in response to engine's stopping restarting. In addition, the electronic control unit 1 is designed so as not to output a signal So for engine's automatic stoppage to the engine stopper in the case where any of a headlight 24, a fog lamp 25 and a room lamp 26 all connected to a battery 23 is lighted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic engine stop/restart control device for automatically stopping/restarting an engine.

(Prior art) In general, on route passes that are often driven in urban areas, the time spent idling and stopped due to waiting at traffic lights, stopping in traffic jams, stopping at bus stops, etc. can reach 40% or more of the total traveling time. There is. During this period of idling, fuel is wasted and at the same time pollutes the air.
In addition, due to vibration and noise during idling, which is unique to the pass,
Passengers will always feel uncomfortable.

Therefore, an automatic engine stop/restart device was developed that automatically stops the engine when the car stops at an intersection or under other predetermined conditions when driving in a city, and automatically starts the engine when the car starts normally. has been done.

FIG. 1 is a schematic block diagram of a conventional engine automatic stop/restart device. For example, in JP-A-58-15729, a control circuit B is operated by output signals of various sensors A such as a vehicle speed sensor, a clutch switch, a headlight switch, a near control switch, etc., and an engine stop/start device C is activated. When driving, it is determined whether the engine stop condition and start condition are met based on the logical product of the engine rotation signal, the signal indicating the alternator's power generation status, and the signal indicating the vehicle starting operation status. What has been done is disclosed.

Furthermore, Japanese Patent Application Laid-Open No. 58-5444 discloses a system with an additional display device for displaying the amount of fuel consumption saved by performing such automatic engine stop/φ restart control.

(Problems with the Prior Art) In conventional devices of this kind, stopping the engine when the headlights or fog lamps are on is prohibited because automatically stopping the engine during night driving places a burden on the driver. However, route buses are equipped with various lighting lights such as room lamps, step lights, and destination indicator lights, so it is not sufficient to determine whether the headlights or fog lights are on or not. For example, even if the headlights are turned off, room lamps that consume a lot of power are often turned on in the early morning or evening, and 1S-, which stops the engine at such times, is dangerous. Furthermore, if the engine is stopped while the room lamp is on, there is a drawback that the room lamp flickers when the starter is energized when the engine is restarted. Conversely, if only the presence or absence of the room lamp is detected, the headlight I/lighting,
An inconvenience arises in that the engine is stopped while the pass is being forwarded with the room lamp off.

Furthermore, the conventional system did not have a function to generate an alarm if the set conditions were not met when performing automatic engine stop and restart control, so the driver could not take appropriate measures quickly. There was a drawback that there was no

(Purpose of the Invention) The present invention aims to eliminate the drawbacks of the conventional example, and detects the usage status of various lighting lights, and detects whether one or two or more lighting lights have large power consumption. If used, automatic engine stop/restart control is prohibited. Further, if the set conditions are not met when performing automatic engine stop/restart control, an alarm is generated to prompt the driver to take appropriate measures.

(Summary of the Invention) The automatic engine stop/restart control device of the present invention automatically stops the engine when sensors and sensor signals from various companies that detect the operating status of each part of the vehicle meet predetermined conditions. Or a control circuit that sends a signal to restart the engine to an engine stopper or starter, a warning device that issues an alarm when sensor signals or other operating conditions of the engine do not meet predetermined conditions, and various types of equipment that respond to engine stop/restart operations. A display device is provided to display information, and automatic engine stop/restart control is not performed when a lighting lamp with large power consumption is in use.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a schematic block diagram of the automatic engine stop/restart control device of the present invention. In the figure, l is an electronic control unit consisting of a computer, etc., and internally includes a CPU, R
It has an OM, a RAM, a timer, an input/output board, a relay drive circuit, etc., and when the power switch 2 is turned on, processing according to flowchart 1 as shown in FIG. 5 proceeds. 3
4 is a vehicle speed sensor that detects the running condition of the vehicle, 4 is an engine rotation sensor that detects the rotational state of the engine, 5 is a neutral switch that is turned on when the transmission is placed in neutral, and 6 is a neutral switch that is turned on when the clutch is completely released. It is a clutch switch, neutral switch 5,
The clutch switch 6 determines the driving operation state of the driver. Reference numeral 7 denotes a pneumatic pressure switch installed in an air tank filled with air used for braking and flanch connection, and is turned on when the pressure drops below a predetermined value.

8 is a room lamp switch, 9 is a headlight switch, 10 is a fog lamp switch, 11 is an air conditioner main switch, 12 is a heater main switch, and 13 is a key switch for driving the starter. Reference numeral 14 denotes a starter engage coil terminal for energizing the starter engage coil, and the voltage generated at the terminal 14 is input to the electronic control unit 1 and is used to calculate the number of times the starter is used. 15 is a self-diagnosis switch for operating the electronic control unit l in a self-diagnosis mode;
Reference numeral 16 denotes a switch for erasing all or part of the contents of the RAM built in the electronic control device 1, all or part of which is related to display data. Reference numeral 17 is an air tank i/flange for stopping the engine, and a motor or an air cylinder or the like is used. The tip of the engine stopper 17 is connected to an intake cut valve or a fuel intake lever necessary for stopping the diesel engine. 18 is a starter, 19 is an air conditioner fan that sends out cold air in the air conditioner, and 20 is a heater fan that sends warm air to the feet of the passenger seat in the heater device. 21 is a warning device consisting of a lamp that displays the operating status of the automatic engine stop/restart device, a lamp that flashes in synchronization with the on/off of various switches and borders in the self-diagnosis mode, and a buzzer that issues an alarm; Reference numeral 22 is a 7-segment digital display device that numerically displays customer type display items such as total travel time, automatic engine stop time, fuel saving effect, number of engine stops, and number of times starter is used. It can be changed with a switch. Here, the warning device 21 and the display device 22 may be installed separately from the electronic control device 1 or built into the electronic control device 1.

When performing automatic engine stop control using the device of the present invention configured as described above, (a) the driver must take his or her foot off the clutch pedal;

(b) The transmission is placed in neutral.

(C) The vehicle speed is 0 or less than a predetermined value (for example, 5 km/h).

(d) The engine speed is idle link rotation (e.g. 80
0 rpm) or less.

(e) The air tank pressure is normal.

It is necessary that the following conditions are met. Further, if a lighting lamp that consumes a large amount of power is on, automatic engine stop control is not performed. That is, in the operating circuit diagram of the illumination light shown in FIG. Stop signal S. is not output to the engine stopper 17. Fig. 4 explains the operation mode at this time, and when there is any one of the headlight switch-on signal Sl, fog lamp switch-on signal S2, and room lamp switch-on signal S3, the output is Signal S. is prevented from forming.

The 51st Δ is a flowchart explaining the processing procedure by the electronic control device 1. The following will be explained along this flowchart.

(1) Turn on the power switch 2 and self-diagnosis switch 15
It is determined whether the switch is on or off, and if the switch is on, the process proceeds to a self-diagnosis processing mode (step PL, P2). When the switch is off, it is determined whether the control start conditions are satisfied, and if the control start conditions are not satisfied, an alarm is issued (steps P5 + P4) (2) The control start conditions are met. If so, the various sensors are checked for abnormalities while the vehicle is running, and if there are no abnormalities, it is determined whether engine stop conditions are satisfied (step P 51 P s ).

Here, check the following engine stop conditions:

(a) The driver has taken his foot off the clutch pedal.

(b) The transmission is placed in neutral.

(C) The vehicle speed is O or below a predetermined value.

(d) The engine speed is below idling speed.

(e) The air tank pressure is correct.

(f) The lighting lamps are not lit.

If the conditions for the above items are satisfied, the engine is stopped (step P7). At this time, if there is any abnormality in the engine or other parts, an alarm will be issued (Step Pa
, P9), if normal, perform predetermined control of the air conditioner or heater as necessary (Step P1o). While stopped, a restart instruction alarm may be generated if necessary (
Steps P1□, P□21).

(3) When restarting the engine, (a) the driver must depress the clutch pedal;

(b) Mi 2 Jiyong is placed in neutral.

(C) The engine must be stopped.

It is checked whether the three-line property is satisfied (step Pr3), and when the M start condition is satisfied, the engine is started IIf (step P14).

At this time, if there is any abnormality in the engine, engine stopper, starter, or starter, predetermined control of the air conditioner or heater is performed as necessary (step P17).

(4) If the engine restart signal is output to the starter and the engine does not restart even after the set time has elapsed, it is determined that the engine is abnormal and a warning is issued (step P+s+P
l-6). In the present invention, an alarm is also generated when the engine does not stop even after a set time has elapsed after outputting a stop signal to the engine stopper, and when the battery output drops below the set value.

(5) Display various items such as the number of times the starter is used, the fuel efficiency effect, and the number of times the engine is stopped (Step P1 day).

In the explanation so far, as a lighting lamp with large power consumption,
Although the headlights, fog lamps, and room lamps are illustrated, it is of course possible to combine other illumination lights. In addition, we explained an example in which engine stop control cannot be performed when any of the headlights, fog lamps, or room lamps are on, but due to differences in the use of lighting lights, for example, when the fog lamps are on It is also possible to perform stop control. In short, in the present invention, the engine is not automatically stopped when a lighting lamp that consumes a large amount of power is turned on.

(Effects of the Invention) As explained above, in the present invention, the usage status of various lighting lights on route buses is detected, and if lighting lights with high battery consumption and power are in use, the engine is stopped. Since control is prohibited, stable engine stop control is performed regardless of whether the 1L is in the morning, evening, night, etc. In addition, as a condition for restarting the engine, we have selected that the engine is stopped, that is, that the lighting lamps that consume a lot of power are not turned on, so for example, when the room lamp is turned on, the engine stops, There is no longer a chance that the room lamp will flicker when restarting.

Furthermore, when performing automatic engine stop/restart control, a warning is issued if the sensor or engine condition IE does not comply with the set conditions, so the driver can take prompt action. You can get the desired effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a conventional engine automatic stop restart device, and FIG. 2 is a schematic block diagram of a conventional engine automatic stop restart device.
FIG. 3 is a schematic block diagram of the restart control device, FIG. 3 is a circuit diagram of illumination lamp control, FIG. 4 is an explanatory diagram of illumination lamp signal processing mode, and FIG. 5 is a flowchart of the processing procedure. 1...Electronic control unit, 2...Power switch, 3...
・Vehicle speed sensor, 4... Engine rotation sensor, 5...
Neutral switch, 6... Franchise switch, 7
...Air tank pressure switch, 8...When the room lamp is lit, 9...Headlight switch, 10...
Fog light switch, 11...Air conditioner main switch. 12... Heater main switch, 13... Starter switch, 14... Starter C terminal, 15... Self-diagnosis switch, 16... RAM erase 7 inch, 17...
...Engine stopper, 18...Starter, 19...
・Air conditioner bleeding fan, 20...Heater fan, 21
... Warning ~ Device, 22... Display device, 23... Battery, 24
...Headlight, 25...Fog lamp, 26.
...Room lamp Figure 1 Figure 3 Figure 4 Figure 5, 31] Hari 3 3 Procedural amendment (voluntary) February 13, 1980 Patent application No. 221701 2. Name of invention Engine automatic stop・Restart control device 3 ・Person making the amendment 1) Relationship with case S Patent applicant address: 6-22-10-4, Minami-Oi, Tokyo Parts Ward ・Agent's address: 3-Kanda Ogawa-cho, Chiyoda-ku, Tokyo 101 145・
Date of amendment order (voluntary) 6. Correct the column ``Detailed Description of the Invention'' of the specification to be amended and the brief explanation ``Main Switch of Heater'' in 1 Drawing to ``Heater Switch.'' (2) If there is an abnormality, see A on page 11, line 15 of the specification.
After that, the l'5 notification is issued (steps P15 and P16).
), insert J if normal. (3) ``Engine restart...'', for example, delete J from lines 8 to 11 on page 13 of the specification. (4) "J on restart" on page 13, line 12 of the specification is corrected to "at restart." (5) Correct "1 heater main switch" on page 14, line 13 of the specification to "r heater switch." (6) Amend Figure 2 of the drawings as shown in the attached sheet.

Claims (1)

[Claims] The interior lamp uses an electronic control device that sends a signal to the engine stop or starter to automatically stop or restart the engine when signals from various sensors that detect the operating status of each part of the vehicle meet predetermined conditions. 1. An automatic engine stop/restart control device comprising a control means for preventing automatic engine stop when the engine is automatically stopped.