JP2001193512A - Engine having functions of gasoline and diesel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine capable of using both gasoline and diesel oil used as a diesel engine efficient in fuel consumption for traveling in an area without houses and switched to a gasoline engine advanced in noise and exhaust gas countermeasures when entering a city with many houses. SOLUTION: To use this engine as a gasoline engine, gasoline is injected from an injector and ignited by a spark plug for using it as a gasoline engine. To use this engine as a diesel engine, a compression ratio is raised to a suitable pressure and diesel oil is injected to an injector for using it as a diesel engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an engine having a function of changing a compression ratio in a cylinder engine arranged in a cylindrical shape and having a function of both a gasoline engine and a diesel engine. Taking advantage of both features, use gasoline and diesel in places where there are many private houses such as urban areas and places where there are no private houses. The engine is used as an engine that does not impair the natural environment by preventing fuel consumption and improving fuel consumption.

[0002]

2. Description of the Related Art In the past, gasoline engines and diesel engines were completely independent of each other, and were divided into gasoline engine vehicles and diesel engine vehicles. is there.

[0003]

When a diesel engine vehicle enters a city with many private houses, the natural environment is spoiled because exhaust gas measures are delayed. When driving in an area without a private house, it is necessary to run as a diesel engine to save fuel consumption, and in a city with many private houses, it is necessary to run as a gasoline engine so as not to damage the natural environment.

[0004]

Accordingly, the present invention provides an injector which is capable of changing the compression ratio of a cylinder-arranged cylinder engine so as to inject gasoline or to inject diesel fuel with a switching valve. A gasoline engine and a diesel engine are provided, and a special injector that injects gasoline is installed, and a special injector that injects diesel fuel is installed separately to inject gasoline. In some cases, the compression ratio is reduced to a suitable pressure to operate as a gasoline engine, and when injecting diesel fuel, the compression ratio is increased to a suitable pressure to operate as a diesel engine.

[0005]

[Action] When operating as a gasoline engine, gasoline is injected from an injector, ignited by an ignition plug, and operated as a gasoline engine. When operating as a diesel engine, the compression ratio is raised to the appropriate pressure, and diesel fuel is injected into the injector to operate as a diesel engine.

[0006] In this case, the injector is provided with a switching valve to inject gasoline or inject diesel fuel, and the structure is a shared injector, and the injector is exclusively for gasoline and diesel fuel. The gasoline engine and the diesel engine can be used properly according to the purpose.

A diesel engine requires a starter motor and a battery larger than a gasoline engine because of a large torque at the time of starting. However, in the present invention, the starter motor and the battery may be small since a start as a gasoline engine is sufficient. . Alternatively, a starter motor and a battery for a diesel engine having good startability can be provided as desired.

Further, when the vehicle runs as a gasoline engine, the compression ratio is slightly changed. For example, when starting or climbing a hill, the compression ratio is lowered. Can be measured.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 1 is a cylinder, 2 is a variable compression ratio device, 3 is a gasoline-only injector, 4 is a diesel fuel injector, 5 is a spark plug, 6 is a common injector with a switching valve that switches between gasoline and diesel fuel. is there.
Reference numeral 7 denotes a piston, and reference numeral 8 denotes an intake / exhaust valve. In this case, a single valve serves as a mechanism for both intake and exhaust. 9 is a cam,
10 is a screw gear, and 11 is an output shaft.

Next, the operation will be described.

When operating as a gasoline engine, a device for changing the compression ratio sets the compression ratio to a pressure suitable for the gasoline engine, stops the flow of fuel from the injector for diesel fuel, and supplies fuel to the injector for gasoline. Further activate the spark plug. When started in this state, it operates as a gasoline engine.

Next, when operating as a diesel engine, the fuel of the injector for gasoline is stopped, the fuel of the injector for diesel fuel flows, and the function of the spark plug is stopped. The device for changing the compression ratio is operated as a diesel engine by increasing the compression ratio to a pressure suitable for the diesel engine.

When the diesel engine stops, it is ready to operate as a gasoline engine. Therefore, a device for changing the compression ratio is set to a pressure suitable for the gasoline engine, the fuel flow of the diesel fuel injector is stopped, and the fuel can be supplied to the gasoline injector. Further activate the spark plug. In this state, it is prepared to start as a gasoline engine.

When a common injector for gasoline and diesel fuel is used, it is necessary to switch the fuel quickly, and it is hoped that a more ideal fuel will appear in the future.

[0014]

As described above, according to the present invention, the advantages of the gasoline engine and the diesel engine are utilized, and if the vehicle is a lorry, the vehicle can be driven as a diesel engine having high fuel consumption efficiency in an area without a private house. However, if you enter a city with many private houses, you can switch to a gasoline engine that has advanced exhaust gas countermeasures, and you can improve the environment including noise problems.

[0015] Even when stopped when using a diesel engine,
The starter motor and battery can be small since the engine can be started by switching to the gasoline engine.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the overall configuration.

FIG. 2 is a layout diagram of a common injector.

FIG. 3 is a special injector layout

FIG. 4 is a structural diagram of a common injector

FIG. 5 (A) Gasoline engine operation diagram (B) Diesel engine operation diagram

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Compression ratio variable device 3 Gasoline-only injector 4 Diesel fuel injector 5 Spark plug 6 Common injector 7 Piston 8 Intake and exhaust valve 9 Cam 10 Screw gear 11 Output shaft

Claims (2)

[Claims] 1. A common injector that can inject gasoline into an engine with a variable compression ratio or inject diesel fuel with a switching valve, and further provide an ignition plug to operate as a gasoline engine, An engine with gasoline and diesel functions that switches to fuel injection, raises the compression ratio to the appropriate pressure, and works as a diesel engine. 2. An engine having a variable compression ratio is provided with a gasoline-only injector and a spark plug for injecting gasoline, and a diesel-only injector for injecting diesel fuel is also provided. An engine with both gasoline and diesel functions that lowers the pressure to work as a gasoline engine, and when injecting diesel fuel, raises the compression ratio to the appropriate pressure and works as a diesel engine.