JPH0821272A - Full throttle gasoline engine - Google Patents

Abstract

PURPOSE:To provide a full throttle gasoline engine which is constituted to generate an output through regulation of only a fuel injection by keeping an air intake amount at a constant value amount without changing a compression ratio so as to improve torque, in a small type gasoline four-cycle engine for a vehicle, such as a small truck and a light truck, with a purpose to load a cargo. CONSTITUTION:An intake amount is not throttled even during a part load and air in an amount constantly equivalent to that of a throttle is sucked so as to prevent lowering of a compression ratio during low rotation. Manifold 4 or intake port injection of fuel is effected by an electronic control fuel injection type injector 6. Fuel and air are mixed and gasified in a cylinder 9 of a swirl or squash type, and electrically ignited by a spark plug 7 to increase torque.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full-throttle gasoline engine, and more particularly to a four-cycle engine which is an internal combustion engine, for carrying cargo such as a light truck or a light truck equipped with a gasoline-fueled engine. It is intended to increase the engine torque.

[0002]

2. Description of the Related Art In a conventional small gasoline-fueled engine, the output is adjusted by the intake amount of the mixed gas from the carburetor by the slot valve during the intake stroke. Since the actual compression ratio decreases, the thermal efficiency decreases, and the engine speed must be increased to generate torque.

[0003]

Therefore, in order to improve the torque of such a small engine that uses gasoline as fuel,
As in the diesel engine, the output is obtained by adjusting only the fuel injection amount without changing the compression ratio while keeping the air intake amount constant, thus obtaining high thermal efficiency due to the large air-fuel ratio at light load and low. Torque can be increased at the rotational position.

[0004]

In consideration of these points, the present invention stops the method of adjusting the output of the gasoline engine by the intake amount of the air-fuel mixture from the carburetor device by the slot valve, and the diesel engine As in the case of the intake method described above, the same amount of air as the full throttle is always taken in, and the fuel injection amount is adjusted by the gasoline injector to obtain a change in output, which improves the thermal efficiency by improving the air-fuel ratio at light load. Try to increase.

[0005]

Thus, the present invention is an internal combustion engine that repeats a four-cycle stroke, and the amount of air obtained in the intake stroke of a diesel engine, that is, the compression at low revolutions by limiting the intake amount by a throttle peculiar to a gasoline engine, is performed. Ratio decrease (6
To 8 atm), do not throttle the intake volume even when part-loading, and always inhale the same amount of full throttle air,
During the intake stroke or the early stage of the compression stroke, the injection of gasoline by an electronically controlled fuel injection system is used to inject gasoline by manifold injection, intake port injection, etc., and the gasoline is injected by swirl, squish, etc. in the cylinder. The fuel is compressed by the ascending motion of the piston within the range where the compression ratio of about 7 to 10 does not self-ignite, and the sparks, like the general gasoline engine, are sparked at the most optimum time of the piston top dead center. Electric sparks from the sparks of the plug cause explosive combustion to increase torque at low rotational positions.

[0006]

1 is a full throttle of the present invention. Fig. 2 is a schematic diagram of the main part of a gasoline engine, and Fig. 2 is a basic operational explanatory diagram that briefly describes the four-cycle stroke of the engine of the present invention. It is omitted, and the mounting location, shape, size, etc. of each part will vary depending on the implementation. First, in the intake stroke of A in Figure 2, 4 cycle stroke, intake
When the valve 2 opens and the piston 1 descends, air is taken in while swirling from the intake manifold 4 at full throttle, and the gasoline injector 6 uses a manifold injection into the cylinder or a low pressure by intake port injection method. Gasoline is injected by the injection method, etc., the intake valve 2 is closed at the bottom dead center of the piston 1, and the fuel injected in the compression stroke of the following FIG. The fuel with a compression ratio of about 7 to 10 is compressed within the range where it does not self-ignite while promoting the mixed atomization of the sparks, and then the spark 1
The mixed gas is electrically ignited by the plug 7 to explode and burn, resulting in the explosive stroke of FIGS. 2 and C. The explosive force pushes down the piston 1, and the connecting rod 10 causes the crankshaft 11 to rotate with the inertia of the explosion. The piston 1 raises the force again, and then the exhaust valve 3 opens, and due to the upward movement of the piston 1 due to the pushing force, the combustion gas in the cylinder is pushed out from the exhaust manifold 5 and the exhaust stroke of FIG. Then, the exhaust valve 3 is closed, the intake valve 2 is opened, the rotary motion of the crankshaft 11 causes the piston 1 to start descending, and fresh air (including EGR) from the intake manifold 4 is fully throttled ( Intake stroke of Fig. 2, A again by taking in (throttle valve removal) Becomes, then by the upward movement of the piston 1 becomes the compression stroke in Fig. 2, B, the connecting rod 10,
The crankshaft 11 causes the rotary motion to repeat the 4-cycle process. (The engine stops when the fuel is cut by deleting the throttle valve. When the carburetor and choke valve are deleted, the engine is cold-started by injectors, controlled by a start-injector time switch, fuel injection by electronic control, etc.).

[0007]

[Effects of the Invention] In the conventional gasoline engine intake stroke, in the method of burning the mixed gas from the carburetor by adjusting the intake amount of the carburetor in the intake stroke, the thermal efficiency due to the reduction of the compression ratio at low speed is low. However, the torque of the gasoline engine is generally low in the low engine speed range, and the torque is increased by the high speed, resulting in wasting fuel when using the engine mainly for loading. Since the full throttle gasoline engine of the present invention has a constant air intake amount, the compression ratio does not change, and the air-fuel ratio at a light load is large so that high thermal efficiency can be obtained. Since it is possible to increase the torque at the low engine speed range, which cannot be obtained by the combustion method,
By using an engine that uses gasoline as fuel, especially by improving the torque of small trucks, light trucks, etc., it becomes a sticky, easy-to-use engine, and it consumes less fuel and is economical compared to the fuel consumption of the method that obtains torque at high rotation speed. Engine.

[0008]

[Brief description of drawings]

FIG. 1 is a full throttle gasoline petrol according to the present invention.
It is a summary diagram for convenience of explanation of main parts of the engine.

[Explanation of symbols]

 1 Piston 2 Intake valve 3 Exhaust valve 4 Intake manifold 5 Exhaust manifold 6 Gasoline injector 7 Spark plug 8 Cylinder head 9 Cylinder 10 Connecting rod 11 Crankshaft

FIG. 2 is a basic operation diagram for simply explaining a 4-cycle stroke of the full throttle gasoline engine of FIG.

[Explanation of symbols]

 A intake stroke B compression stroke C explosion stroke D exhaust stroke

Claims (1)

[Claims] 1. A four-cycle internal combustion engine using gasoline as a fuel, which constantly inhales the same amount of air as the full throttle during the intake stroke, and uses a fuel injection system for gasoline injection during the intake stroke or at the beginning of the compression stroke. The low-pressure injector is used to inject gasoline at a low pressure using a manifold or intake port injection method, etc., and to mix and atomize gasoline and air by swirl, squish, etc., and to achieve compression within the compression stroke in the range of 7 to 10 that does not self-ignite It is an engine that repeats four cycle strokes by performing explosive combustion by electric ignition with a spark plug at the most optimal ignition timing of the top dead center of the piston, performing an exhaust stroke, and repeating a four cycle stroke. The output of the mixed gas intake is not adjusted, and the same amount of full throttle air is always used. Type was characterized by performing the subtraction of the output by the injection quantity of the fuel (gasoline), full throttle gasoline engine.