JPH0122945Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine rotation warning device for a vehicle that reliably indicates that the engine is rotating when the ignition key is turned to the starter position while the engine is rotating.

When starting a car's engine, the driver inserts the ignition key and turns it to the on position.The charge lamp that indicates the charging status of the battery lights up first.Then, when the driver turns the ignition key to the start position and turns on the ignition switch, the engine starts. When the engine starts to rotate, the charge light goes off and remains off while the engine is running. For this reason, drivers cannot confirm whether the engine is running or not just by looking at the charge lamp, but rather by checking the engine sound, but in relatively noisy places such as urban areas, the engine sound is Since the noise is almost canceled out by the noise, there are cases where the ignition is turned on thinking that the engine is stopped.

By the way, when you turn on the ignition switch, the starter pinion automatically pops out and meshes with the engine's ring gear, and the rotation of the pinion rotates the ring gear and starts the engine, but if you operate the ignition while the engine is running, it will already start at high speed. The rotating ring gear and pinion cannot mesh with each other, which may cause damage to the pinion and ring gear, leading to damage to the starter.

Therefore, in order to prevent such damage to the starter, when the engine rotation speed reaches a certain number of rotations after the engine has started, a starter cutoff signal that disables the starter is used to cut off the power supply circuit from the battery to the starter. After that, the starter pinion will not pop out even if the ignition is operated. In this way, damage to the starter can be prevented even if the ignition is operated while the engine is rotating.

However, modern vehicles, especially luxury cars, have relatively low engine noise and very little vibration, so when the vehicle is stopped at a traffic light, the driver may not notice even if the engine is running.
You may try to get the starter working again.
In such cases, damage to the starter can be prevented by the method above, but the driver usually operates the ignition key at least two or three times before confirming that the engine is running. As a result, there is a risk that starting will be delayed, causing trouble to following vehicles on a busy road, or causing panic when the vehicle is stopped at a railroad crossing, further delaying starting.

The present invention was developed in consideration of the above points, and is designed to prevent the starter from operating even if the ignition key is turned to the starter position while the engine is running. When turned to the starter position,
To ensure that the engine is running, a warning lamp lights up when the ignition key is turned to the starter position while the engine is running.

The present invention will be explained below based on the drawings.

FIG. 1 shows an embodiment of the electric circuit of the engine rotation warning device according to the present invention.
2 is an engine rotation speed sensor that detects the engine rotation speed; 2 is a reference level setting device that sets a reference level signal (200) that is a criterion for determining the engine rotation speed;
3 compares the rotation speed signal (100) from the engine rotation speed sensor 1 and the reference level signal (200),
A comparator that outputs a starter cut signal (300) when the rotation speed signal (100) is greater than the reference level signal (200), 4 is the battery, 5 is the starter, 6
is a relay that has a normally closed contact 6a that turns on and off based on the starter cutoff signal (300) from comparator 3, 7 is a switch that turns on when the ignition key is in the start position, and 8 is a switch that turns on when the switch is turned on. 9 is a flashing unit that receives power from the battery 4 and generates a flashing signal; 10 is a relay switch that flashes by the flashing signal from the flashing unit 9 when the relay switch 8 is turned on; This is a warning light that warns you that the engine is running.

FIG. 2 is a flowchart showing the operation of the engine rotation warning device. Next, the engine rotation warning operation will be explained based on this diagram.

When the ignition key is inserted into a predetermined position, turned to the on position, and then moved to the start position, the starter 5 is activated and the engine is started. Thereafter, the engine rotation speed increases, and the engine rotation speed sensor 1 detects the rotation speed, and outputs a rotation speed signal (100). This rotation speed signal (100) is compared with the reference level signal (200) in comparator 3, and when the rotation speed signal (100) exceeds the level of the reference level signal (200), a starter cutoff signal (300) is output. be done. Contact 6 of relay 6 is activated by this starter cutoff signal (300).
Since a is turned off, the power supply circuit from the battery 4 to the starter 5 is cut off, and the starter 5 does not operate thereafter. On the other hand, when switch 7 is turned on by ignition operation at this time, contact 8a of relay switch 8 is turned on by starter cutoff signal (300).
is turned on, and the warning lamp 10 blinks in response to a blinking signal from the blinking unit 9 which is powered by the battery 4.

As described above, in this embodiment, when the engine speed exceeds a predetermined value, the warning lamp 10 flashes when the engine is started (ignition operation) using the starter cut signal that disables the starter. This ensures that the driver knows that the engine is running.

In addition, although the above embodiment uses a flashing lamp to warn of engine rotation, other warning means may be used.

As explained above, the present invention provides a vehicle in which the starter does not operate even if the ignition key is turned to the starter position while the engine is running.
If you turn on the ignition switch while the engine is running, a warning will be given to warn you that the engine is running, so if your starting operation is delayed and the vehicle behind you is inconvenienced, or if you are stopped at a railroad crossing, the vehicle will start immediately. It has the effect of not having to panic because it is easy to operate.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of the electric circuit of the vehicle engine rotation warning device according to the present invention, and FIG. 2 is a flowchart showing the operation of the vehicle engine rotation warning device shown in FIG. 1...Engine speed sensor, 2...Reference level setter, 3...Comparator, 4...Battery, 5
...Starter, 6...Relay, 7...Switch,
8... Relay switch, 9... Flashing unit, 1
0...Warning lamp.

Claims (1)

[Scope of utility model registration request] In a vehicle in which the starter does not operate even if the ignition key is turned to the starter position while the engine is running, there is a rotation sensor that outputs an output when the engine is rotating above a certain value, and an ignition sensor that outputs an output while the engine is rotating above a certain value. 1. An engine rotation warning device for a vehicle, comprising an engine rotation warning means that is activated when a transmission key is turned to a starter position.