JPS5818558A - Automatically stopping and restarting device of engine - Google Patents

Abstract

PURPOSE:To surely prevent a starter from overrunning, at starting of an engine with the starter, by stopping the starter when speed of the engine or output terminal voltage of a voltage regulator increases to at least a prescribed value. CONSTITUTION:The captioned device is operated in such a manner that each output signal of operational condition detecting means from clutch upper and lower switches 18A, 18B, car speed sensor 12, turn signal switch 36, wiper switch 34, water temperature sensor 22, etc. is fetched to a control circuit 1, when a prescribed condition is decided to be met, cut of fuel and ignition is performed to automatically stop an engine 20. In this case when the engine 20 is restarted under a prescribed condition, a clutch pedal 3 is fully depressed to operate a starter 42. Then the engine 20 is restarted, and the starter 42 is stopped on condition that output of an alternator 26 is increased and voltage of a terminal L in a voltage regulator 55 rises.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic engine stop/start device for automatically stopping and restarting an engine.

If you are stopped at a traffic light at an intersection in the city and are mourning, etc.
If you stop the carrot each time, you will have to restart the engine each time it develops, which is not only a nuisance but also lacks the speed of development.

In general, the stop time during city driving accounts for 60% of the total driving time, and the amount of exhaust gas emitted (during idling) and the amount of fuel consumed cannot be ignored.

Therefore, when a car stops at an intersection etc. while driving in a city, the engine automatically stops under other specified conditions, and automatically starts when the normal starting operation (depressing the clutch pedal) is performed. An automatic stop/start device has been developed.

Automatic starting of the engine using such a system requires that the clutch pedal O be depressed when the shift levers 1 and 1 are noisy, and that the starter is started only when the engine is in the stopped state IIK.

Then, the solution # of the 9 starters (i.e., energization off) is determined depending on whether or not a predetermined condition is satisfied.

Conventional starter S# is voltage legiere-1
(When the voltage of OL1a recovers to the specified voltage, the starter relay will be turned off automatically at 5K. However, in the configuration where the starter is turned off depending on the voltage of L and O, the voltage The disadvantage is that if the regulator breaks down, the starter cannot be turned off.

The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks, and to improve the reliability of the starter! J! It provides an automatic engine stop/start device that can be turned off.

In order to achieve the above object fR, the present invention is designed to turn off the starter relay when the signal from the voltage regulator OL terminal or the engine rotational speed reaches a predetermined rotational speed.

FIG. 1 is a block diagram showing the overall configuration of an automatic engine stop/start device to which the present invention is applied.

In the first WJ, 1 is a control circuit], lock control circuit I
Detection outputs from various sensors are input to K. You can create a dedicated circuit for this control circuit or 1! This is the main switch for setting or canceling the function to automatically stop or start the engine (hereinafter referred to as IR8), which may be performed using a computer. After starting, when the main switch 10 is pressed, ER8 is set. Further, after setting ER8, if the main switch 10 is pressed again, ER8 will be canceled. The ER8 setting will be automatically canceled under other predetermined conditions, but
This K will be described later.

Furthermore, the vehicle speed sensor 12 is a 12Fi vehicle speed sensor, and the vehicle speed sensor 12 detects whether the vehicle is running or stopped, and the detection output of the sensor 12 is used to determine whether the engine should automatically stop. The ignition circuit 14 is an ignition circuit, and the control circuit 1 processes the ignition pulse signal output from the ignition circuit 14 as an engine rotation speed signal. This engine rotation speed signal is determined by the ER8 settings 1. It is used to determine the conditions for automatic engine stop, automatic engine start, and ER8 setting cancellation. Reference numeral 16 designates a clutch pedal, and 1s and IJIB represent a clutch upper switch and a clutch lower switch, respectively, which operate on and off in conjunction with the clutch pedal. These switches are also 40 which detects the amount of depression of the clutch pedal 1g], and the clutch upper switch 18 is turned on when the clutch pedal 16 is depressed by a certain percentage of the full stroke (for example, 30- or more). Then, the control circuit 1 sends out the IK signal, and the control circuit 1 controls the engine so as not to stop it. The lower clutch switch 18B is turned on when the clutch pedal 16 is fully depressed and sends a signal (a signal that permits automatic engine start) to the control circuit IK.

The engine 20 includes a water temperature sensor 22 that detects the engine cooling water temperature. An oil pressure switch 24 is provided to detect the oil pressure of the engine oil, and these detection outputs are input to the control circuit IK. It is a 26-volt alternator], and its L terminal is sent to control circuit 1. 28 is a battery voltage input, and 30 is a magnetic switch for controlling the operation of the air conditioner, which is turned on when the air conditioner is activated.

Further, 32 is a headlamp switch that switches the headlamp on or off, and 34 is a wiper switch that detects the operating state of the wiper).These switches 30, 32
．． Reference numeral 34 detects whether or not the mK stone has a high electrical load. Further, 36 is a turn signal switch that detects the right turn state of the vehicle, and 38 is a door opening/closing switch for the driver's seat example.
The door switch detects Il, and the former of these detection outputs is used as a condition for automatically stopping the engine, and the errant output is used as a judgment input for setting conditions and setting cancellation conditions for ER8.

Furthermore, 51 detects whether or not the slope of the slope on which the vehicle is stopped is greater than a predetermined value (for example, 2 degrees), and if it is greater than the predetermined value, the slope senna becomes a KON state, and 52 determines whether the Fi engine has an idle IK. (ON in idle state)
), and 54 is a defogger switch that detects whether or not the defogger is being used.

Now, the predetermined conditions are met, and ER8 becomes the main switch IO.
After the settings have been made, the engine 20ID11 is stopped and automatically started as follows. That is, engine 20C)
When the stop condition is met, an engine stop signal 44 is output to the fuel cut relay 40 in the control circuit 1, and the fuel cut solenoid (not shown) in the fuel supply system in the engine 20 is output to the fuel cut relay 40. cut signal 5
0, an ignition cut signal 60 is output to the over-power circuit 14, and the engine is stopped. However, in order to achieve the automatic engine stop function, it may be advisable to only cut the ignition without cutting the fuel, but in this case, the engine will run on, so the driving feeling may be affected. It has the disadvantage that it worsens.

On the other hand, when ER8 is in the set state and the clutch pedal 16 is fully depressed while the engine is stopped, the clutch lower switch 18B is turned on, and when other conditions are satisfied (described later), the control circuit Engine start signal 46 is output to sister starter relay 41, and this
2 is energized and the engine 20 is started.

21st! ll is a circuit diagram showing an embodiment of the present invention.

In FIG. 2, the same members used in FIG. 1 are given the same reference numerals.

The ignition pulse signal outputted from the high point circuit 14) and the voltage at the voltage relay 55OL terminal are added to the control circuit 10 as control information. The control circuit 1 includes a vehicle speed sensor 12
detects vehicle speed 0, clutch pedal 16 is depressed, and L
The engine start signal 46 is output based on the terminal voltage being at a low level and the engine rotation speed (calculated by the control circuit 1 based on the ignition pulse signal) being below the set rotation speed (for example, 200 rpm). Ru. wrinkle engine Ma
(No. 1 46 drives the starter relay 41 via each of the clutch upper switch 18m and the clutch lower switch 18B. When the starter relay 41 is turned on, the starter relay power is supplied to the starter 42, and the starter 4t starts. When the engine 20 is started by starting the starter 42, an output voltage is generated in the alternator 26 connected to the engine, and a voltage regulator is generated.

The terminal voltage of the dilator 550L increases.

On the other hand, when the engine speed reaches the set speed tR1I, it's too late! The 5SOL terminal is also at high level.

Therefore, the engine speed is set i! If the rotation speed is high or the L terminal of the regulator is at the /S level or O, the 1kK control circuit 1 cuts the engine start signal 46 and disconnects the power to the star 1420. .

If the engine driven by the starter 42 rotates completely on its own, the voltage regulation will be 5.
So'r, if the terminal voltage increases, the engine speed will also increase, so if you turn off the starter pipe according to the OR condition, the starter will be turned off reliably even in the event of a voltage regierator failure. can do.

As is clear from the above, according to the present invention, it is possible to reliably prevent starter overrun, and also to
It also improves reliability against V-taper failures.

[Brief explanation of drawings]

The first block shows the overall configuration of the engine automatic stop/start device to which the present invention is applied, and the 211th shows the block cause of the present invention.
It is a circuit diagram showing an O* example. 1... Control circuit, 14... Ignition circuit, 18 Mu... Clara chia horn (switch, 18B'') Clutch lower switch, 26... Alternator, 41... Starter relay 42- -@Starter, 55...-Fist Voltage Regulator. Agent Tatsuyuki Unuma (f'1 or 2)

Claims (1)

[Claims] (1) In the engine automatic stop control system f, which detects the operating status m of each part of the vehicle and stops and automatically starts the engine/engine movement based on these, if the engine speed exceeds a predetermined value, Power generation status of voltage regulator λ regulator? l! ΣshowT
a starter off command output section that outputs a command to turn off the starter based on the terminal voltage being above a predetermined value, and a starter off command output section that energizes the star voice according to the command output An automatic engine stop/start device equipped with an automatic engine stop/start device.