JPS58148223A - Starting system of internal-combustion engine - Google Patents

Abstract

PURPOSE:To eliminate the necessity for starter motor which requires large electric power, by previously leaving unburned fresh air in a combustion chamber at stopping of an engine and supplying a suitable amount of fuel at restarting to form a mixture then smoothly starting the engine by itself. CONSTITUTION:Fuel injection and ignition are stopped immediately before stopping an engine to leave fresh air in a combustion chamber 30. A key 1 is operated to start operation of a control circuit 36. In consequence, the circuit 36 recognizes a neutral position of a gear by an output of a transmission sensor 35 while decides a cylinder in an expansion stroke on the basis of an output of a crank sensor 28 to calculate a residual amount of air in the chamber 30 corresponding to an angle of a crankshaft 26, and the circuit 36 calculates a fuel feed amount met to the residual amount of air, then fuel is injected in the chamber 30 from an injection valve 31 to perform combustion of a mixture by an ignition plug 29.

Description

[Detailed description of the invention] The present invention relates to an internal engine starting method.

As a conventional starting device for Uchi@a, for example, the one shown in Fig. 1 (19
1974 Datsun Pickup Service Manual) K
There is something to show. This consists of an electromagnetic coil 4 that is supplied with current from a battery 2 when key L is operated and urges the plunger 3 to the left against a spring device, and a contact plate 6 that is pressed by the movement of the plunger 3 and moves to the left. And the spring XO of this contact plate 6
A contact switch 9 which is closed in the left direction against the resistance and which applies the voltage of the battery 2 to the Futakako 8 of the starting motor 7, and an rt nine pinion 1g which is slidably attached to the rotating shaft 11 of the starting motor 7 and The rLK is connected via a spring 134 to the nine collar 14, and is pivoted to the shaft 15, one end of which is aligned with the right end K11 of the plunger 3, and the other end is interlocked with the nine shift lever 16 and the pinion 12 near gI. It is formed on the outer periphery of the flywheel of the engine and consists of nine ring gears 17.

In such a starting device, the lever 16 is rotated counterclockwise by the operation of the key 1 to engage the binion 12v ring gear 17 and the starting motor 7! t11
At first, the engine 11V is idled, and then the air-fuel mixture is sucked into the combustion engine 11 of the cylinder, ignited, and fried. After the first explosion, Binion 12 and Y Gugya 17 threatened to cause the n% engine to rotate on its own blade.

However, such conventional activation 1! ItK is,
The power consumption is extremely large (approximately 300 amperes) @ dynamic motor 7 and a large capacity battery 2 are required, which increases the weight of the vehicle and is disadvantageous in terms of cost. In addition, the shock when the engine starts idling on Tanabata 7 and the first explosion begins is great, so hearing was required to stop the engine from idling cleanly and to ensure a smooth start.

The present invention was developed by focusing on the gap in the conventional start-up position, and allows fresh air to be combusted to remain unburned when the engine is stopped, thereby reducing the combustion chamber of the cylinder in the middle of the expansion stroke. When starting the engine, an appropriate amount of fuel is supplied to the engine to form a 'C mixture, which is then combusted to allow the engine to start smoothly with its own blade. be.

Below, examples of the present invention will be described. Explaining glWJ 0 II 2 Figure explains the operating system of the starting m device, 21 is an engine, the cylinder 22 of this is slidably housed with a piston 2s, and the crankcase 24 has a piston 23! A connecting rod 2s and a crankshaft 26 are accommodated therein. 27 is I with the crankshaft 26
Ic is a rotating magnetic pole disk whose outer periphery is magnetized at equal intervals and with equal width, and a crank angle sensor 26 such as a magnetic head is disposed opposite to RLK. 2
Reference numeral 9 designates a spark plug as an ignition device that looks into the combustion chamber 30, 31 a fuel injection valve as a fuel supply device, 32 an exhaust valve, and 33 an intake valve. Further, 34 is an accelerator sensor, and 35 is a transformer engine pressure sensor provided in the transformer transmission 37. Reference numeral 36 denotes a control circuit 1 which controls ignition tie setting and fuel injection amount based on the operation signal of key 1 and the output signal of sensor 28.34.35.

Next, the operation system of this starting device will be explained in detail with reference to the flowchart of the taS diagram and the engine stroke diagram of diagram 1g4.

First, immediately before stopping the engine, fuel injection and ignition are stopped so that fresh air remains in the combustion chamber 30. That is, while the engine is stopped, fresh air remains in the combustion chamber 30 of one of the cylinders.

Next, to start the engine, operate key 1 and control @ circuit 3.
11'l Start operation. This ninth control m circuit 3 is used to set the gear air position according to the output of the transformer construction 71 and the gear sensor 3s, and also to set the gear position to the crank sensor 2.
Based on the output of No. 8, the cylinder in the tension stroke is determined, and the combustion air amount corresponding to the crankshaft angle 26 (piston position) K is calculated. Also, this part
The circuit 36 calculates the fuel supply amount commensurate with the residual air amount, and based on the result, injects the fuel from the fuel injection valve 31 into the combustion chamber 1so as shown in FIG. A spark is generated in the ignition plug 29, and as shown in FIG.
The air-fuel mixture is combusted as shown in i>. The inside of this caged combustion chamber 30 is released due to pressure, the piston 23 descends by itself, and the engine starts rotating. Also, No. 411(c) is the piston 2
This shows a state in which the exhaust valve 32 opens near the bottom dead center of s and exhaust begins. Burning i at this point! The pressure inside 30 drops and the driving force disappears. After this, the same operation is taken over by the other cylinders 22, and the lateral rotation 14 continues.

In this way, a@ operates and warms up, and after the friend,
If you want to restart the engine after temporarily stopping it, press key 1.
'41: Bet on the accelerator instead of operating. As a result, the accelerator operation amount signal of the accelerator Senna S4 becomes
It is input to the la circuit 36, and fuel can be injected from the fuel injection valve 31 to start the startup according to the above procedure. Note that the gear position of the transmission 37 at the time of starting the machine is preferably neutral, but if there are fewer gears, it is possible to start in low gear. Nine, automatic transmission t'11! Of course, there is no @ between.

As explained above, according to the present invention, fresh air is left in the combustion chamber of a stopped engine in advance, and an appropriate amount of fuel is supplied into the combustion chamber of a cylinder stopped in the middle of the expansion stroke. By igniting and burning the air-fuel mixture to start the engine, a starting motor that consumes a large amount of power is no longer needed, and the battery capacity can be reduced, which is effective in reducing weight and cost. be.

9. Stop the warmed up engine. - When restarting the engine afterward, just by warming up the accelerator, the engine can be started immediately on its own, providing smooth and responsive starting performance.

In addition, by supplying direct II fuel into the cylinder's internal combustion engine, responsiveness is increased even during normal engine operation, and when fuel is running low, the fuel can be cut to prevent unburned HC from blowing through. It has a great effect on countermeasures against engineering Z-tushi, and it's down to 1%! This effect is large in cyclo-engines.
be.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing a conventional internal agitation engine starting device;
FIG. 2 is an explanatory diagram of the configuration of the starting device of the present invention, FIG. 113 is a 70-chart of the starting operation, and FIG. 4(a), (
FIG. 4 is an explanatory diagram showing a state in which one engine is operated for 11K before operation of the engine shown in FIG. 21... Engine, 2... Series y/, IS-... Piston, 26... Crankshaft 7), zs''... Crank angle senna, 29... Ignition device, 30... Combustion chamber ,3
1...Fuel supply equipment, 34...Accelerator yt, s
s...trans itsushi songyasenna, s@...control@circuit. Figure 3 26 26

Claims (1)

[Claims] A piston that reciprocates within a cylinder, a fuel supply device that supplies fuel to the combustion chamber of the cylinder, and an ignition device that ignites and burns a mixture of fuel and air.
In the engine 111, when the engine is stopped, combustion *Kfr''fi is left, and when the engine is restarted, IIaS is supplied in accordance with the amount of fresh air remaining in the combustion chamber of the cylinder in the middle of the 111M1 stroke. An internal combustion engine starting method that creates 1 aiki and ignites and burns it to start the engine on its own.