OF THE MOVING VEHICLE

DESCRIPTION OF THE INVENTION

The invention area of engineering

The invention belongs to the area of engineering where technical solutions are developed. By applying it on motor vehicles, the consumption of fuel and the emission of polluting substances and C02 are diminished.

Technical problem

The advanced start-stop systems enable the engine of a vehiele to shut down while in motion and when appropriate conditions for that are formed. The further motion of the vehicle is made possible by the inertial force of the sole vehicle.

When the power of inertial forces decreases so that the further movement of the vehicle to a wanted speed is impossible, it is necessary to restart the engine.

By starting the engine, the movement of a vehicle is made possible by using the fuel energy, i.e. by the combustion of fuel in an internal combustion engine. Starting the engine has to be done so that its losses are as little as possible and the level of usability of the system becomes as high as possible.

The situation in technology

In the existing situation in technology sueh a device and procedure are not known to the applicant.

What is known is that by restarting the engine electrically using the starter, eleetrical energy from the battery is spent. This electrical energy stored in the battery is obtained by the fuel's chemical energy in an engine operated through the alternator. The total level of usability of the starting system is a product obtained by levels of usability of certain devices in the ehain of obtaining, storing and consuming electrical energy. In this case, it is an engine-belt transmission - alternator - cables - battery - cables - starter.

Since in real conditions the possibility of inertia driving occurs often, there is the need for the same number of repeated ignitions of the engine.

Since to start the engine electrically, a larger part of fuel energy is spent to cover for the losses in the starting system, the level of usability is low.

To start the engine frequently, the devices in the starting system have to be more dimensioned and better constructed which directly increases the production costs and the sole price of the vehicle.

Presenting the essenee of the invention

The aim of the invention, which is also a technical nuance, is to enable the maintenance of the highest possible level of usability from the fuel energy by increasing the energy efficiency of starting the engine, i.e. to use the fuel energy only for the vehicle motion and avoid using it to restart the engine. As a consequence, the energy efficiency of driving is increased. Indireetly, the costs of production are decreased and consequently the price of the vehicle as a product is decreased, too.

To avoid problems of restarting the engine electrically, starting the engine is ^' done mechanically, by using the inertial force of the moving vehicle and the existing transmission mechanisms of motion and vehiele power along with a synchronisation phase. The initial, necessary torque for starting the engine is obtained from the inertial force of the moving vehicle by turning onthc adequate level of transmission (depending on the current motion speed) and turning off the sceond level of power supply (on the ignition switch) and by releasing the clutch pedal. By a thoroughly turned on clutch the synchronisation of the engine rotation speed and the gear shift input shaft speed is achieved. In that moment, the second level of power supply is turned on.

By turning on the adequate level of transmission, the gear shift input shaft enters into a strong kinematic connection with the vehicle's driving wheels through other transmission mechanisms of motion and power (differential, axle, wheels). By releasing the clutch pedal, a kinematic connection of the crankshaft and the gear shift input shaft is formed through the clutch.

The engine rotation speed increases from zero from the moment the clutch pedal is released and by completely releasing the clutch pedal, i.e. by turning on the clutch, it reaches the rotation speed of the gear shift input shaft.

In that moment, the synchronisation of speeds is completed and the mechanical conditions to start the engine without jolts are fulfilled.

By turning on the second level of supply, the engine is supplied with fuel and the other conditions for the ignition of the fuel and air mixture in the engine cylinder are fulfilled.

The engine continues running. The engine nominal power, obtained from fuel power, is again on disposal to overcome the resistance occurring due to the drive and motion of the vehicle. Besides using the existing motion and power transmitters and engine deviees, a new device is installed. By shutting down the engine it enables inertial driving and restarting the engine after the completion of the inertial driving phase.

A short list of drawings The accompanying drawing included in the deseription and being a constituent part of description of the invention illustrates the best way to perform the invention and helps explaining the basic principles of the invention.

Picture 1. represents the device in line with the described invention which, with the existing power and motion transmitters and the other engine devices, makes possible the performanee of the procedure of shutting down and restarting the engine of a vehicle in motion after the completion of the inertial driving phase.

A detailed description of at least one way of the invention realisation

What follows is a detailed deseription of the assumed realisation of the invention and one example is illustrated in the accompanying drawing. The device consists of a microcontroller 1, movement sensor 2 and end switch4. The movement sensor 2 is installed close to the gear shift lever 3 so that it registers the neutral position of the gear shift handle.

The end switch 4 is installed on the clutch pedal 5 so that it registers a completely turned on clutch, i.e. the upper end position of the clutch pedal 5.

The movement sensor 2 and the end switch 4 give the input signal to the microcontroller 1 every time there is a change in the position of the gear switch handle and/or clutch pedal.

Based on the input signals and the microcontroller's 1 applicative programme activation occurs which means that the relay output of the microcontroller 9 is shut. By shutting the relay output 9, the second level of power supply 7 is activated, while it is deactivated by opening the relay output.

When the gear shift handle is in a neutral position, the movement sensor 2 gives an upward signal to the microcontroller. If gear is changed in a given time, the second level of supply is not interrupted and driving can be continued without shutting down the engine, By keeping the gear shift handle in a neutral position, after a given time the second level of supply 7 is turned off, the engine shuts down and the inertial drive continues. Restarting the engine continues by putting the gear shift handle into the adequate level of transmission (gear) and by terminating the release of the clutch pedal 5 when the end switch 4 is activated.

With new input signals, the relay output is shut, i.e. the second level of supply 7 is activated and the engine starts.

Inertial driving will be only possible if the key is in the ignition switeh 8in the first (I) supply position 6. If the key is in the second (II) position 7, the drive is normal, without inertial driving phases.

In this way the invention enables a higher energy efficiency of restarting the engine, an easy shut down and restarting of the engine of a vehicle in motion after the completion of the inertial driving phase. The invention includes significant improvements in regard to former solutions of starting the engine electrieally. A list of used identification signs

1 - microcontroller

2 - movement sensor

3 - axial of the gear shift lever

4 - end switch 5 - clutch pedal

6 - (I) ¹ level of power supply on the ignition switch (position of electricity supply, in this position the electrical equipment is turned on, the control light for the battery topping up is turned on)

7 - (II) 2 ^nd level of power supply on the ignition switch (ignition, the control lights turn on) 8 - ignition switch

9 - relay output of the microcontroller

10 - relay input of the microcontroller