JPH01138360A - Engine equipped with exhaust turbosupercharger - Google Patents

Abstract

PURPOSE:To improve the acceleration performance without accompanying the trouble such as increase of exhaust gas and black smoke by constituting the title device so that liquid oxygen is jetted into a combustion chamber by an injection means during the engine acceleration operation. CONSTITUTION:An exhaust turbosupercharger 3 supercharges an engine 1 with intake by the revolution of a compressor 12 directly connected with an exhaust turbine 11. In this case, a cylinder head is installed in the state where the top edge of an injection nozzle 8 connected with a liquid oxygen storage tank 6 is set close to the inside of a combustion chamber 7. A solenoid valve 9 is installed in the injection nozzle 8, and opening/closing-controlled by a controller 10 into which the engine speed, boost pressure, fuel injection pump rack position, etc., inputted as control information. In other words, when the controller 10 detects the engine acceleration state, the solenoid valve 9 is opened, and the liquid oxygen is jetted into the combustion chamber 7 in a prescribed timing, and fuel is perfectly combusted, and the necessary output and torque can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an engine equipped with an exhaust turbo supercharger, and particularly to an engine equipped with an exhaust turbo supercharger that improves acceleration performance.

<Prior Art> In recent years, engines equipped with exhaust turbo superchargers have been increasing in order to improve performance. This exhaust turbo supercharger attempts to increase output and torque by driving a compressor with engine exhaust energy to send a large amount of air into the cylinder and supplying fuel commensurate with the amount of air. It is extremely effective in a range exceeding the rotational speed and load. However, since the compressor is rotated by the exhaust energy of the engine itself, if you try to accelerate rapidly from a constant engine speed, there will be a delay in the start-up of the compressor due to the lack of exhaust energy, and there will be insufficient energy in the cylinder. air cannot be sent. Therefore, during such sudden acceleration, incomplete combustion occurs due to lack of oxygen, resulting in poor acceleration due to lack of output and torque.
Alternatively, problems such as an increase in black smoke and exhaust gas occurred.

In order to eliminate such problems, as shown in Japanese Patent Publication No. 57-2892, the specifications of the intake system have been developed by setting a tuning point for inertial supercharging when the engine rotates at low speed, or by using a special method. As shown in Japanese Patent Publication No. 52-104614, a method has been proposed in which air is blown into the cylinder from an air tank when the engine accelerates.

<Problems to be solved by the invention> However, although the former increases the amount of intake air at low speeds, it has problems such as increased pumping loss and the need for extra space because the intake pipe becomes longer. However, the latter method has problems in that it takes a long time to blow in the necessary amount of air, or it requires a large space because a large amount of air must be stored.

The present invention was made to solve these conventional problems, and it is possible to quickly obtain the oxygen necessary for combustion during acceleration without increasing the pumping loss or requiring an unnecessarily large space. The purpose is to provide a device that can reliably supply fuel into the combustion chamber.

<Means for Solving the Problems> In order to achieve the above object, in the present invention, in an engine equipped with an exhaust turbo supercharger, a storage means for storing liquid oxygen is provided, and the liquid oxygen stored in the storage means is A normally closed injection means is provided for injecting liquid oxygen into the combustion chamber. By providing a detection means for detecting the operating state of the engine and a control means for outputting a valve opening signal to the injection means based on the output of the detection means, liquid oxygen is injected into the combustion chamber during accelerated operation of the engine. It is configured to spray.

<Operation> As described above, the detection means for detecting the operating state of the engine is used to inject the stored liquid oxygen into the combustion chamber when the engine accelerates, so combustion is possible without increasing the pumping loss. The oxygen required for the engine is quickly supplied, and since the volume is only a fraction of that of air, output and torque can be improved without requiring much space.

(Example) Examples of the present invention will be described in detail below based on the drawings.

Exhaust turbo supercharger 3 from exhaust manifold 2 of engine 1
A compressor 12 driven by the turbine 11 and an intake manifold 5 are connected via an air supply vibe 4 to form an engine with an exhaust turbo supercharger.

On the other hand, an injection nozzle 8 connected to a liquid oxygen storage tank 6 via a pipe is attached to the cylinder head with its tip facing into the combustion chamber 7.

This injection nozzle 8 is integrally provided with a solenoid valve 9, which is configured to be opened and closed controlled by a controller 10 to which engine speed, boost pressure, fuel injection bomb rack position, etc. are supplied as control information. ing.

In an engine with an exhaust turbo supercharger having such a configuration,
When the controller 10 detects the acceleration state of the engine, it opens the electromagnetic valve 9 and injects liquid oxygen into the combustion chamber 7 in an appropriate amount at a predetermined timing.

Therefore, even if there is a delay in the rotation start-up of the exhaust turbo supercharger 3, a sufficient amount of oxygen is supplied to the combustion chamber 7, so that acceleration is detected and the combustion chamber 7 is simultaneously supercharged. The fuel is completely combusted and the necessary power and torque are obtained. Furthermore, since combustion is carried out in sufficient oxygen, there is no increase in exhaust gas or black smoke due to incomplete combustion, and since liquid oxygen is directly injected into the combustion chamber 7, there is no increase in bombing loss.

Incidentally, in the case of the present invention, the amount of air blown can be small compared to conventional air blowing, and therefore the time required for blowing is extremely short. For this reason, it is not limited to accelerating from low speeds as in the past, but can also be fully applied to accelerations at high speeds. Furthermore, since the volume occupied by the storage chamber is a fraction of that of air, it does not require much space.

(Effects of the Invention) As explained above, according to the present invention, the oxygen for combustion required during engine acceleration can be reliably supplied into the combustion chamber in a short time without increasing the pumping loss or expanding the space. Therefore, it is possible to obtain good acceleration performance without causing problems such as an increase in exhaust gas and black smoke.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram showing an embodiment of an engine with an exhaust turbo supercharger according to the present invention.

Claims (1)

[Claims] In an engine equipped with an exhaust turbo supercharger, a storage means for storing liquid oxygen, a normally closed injection means for injecting the liquid oxygen stored in the storage means into a combustion chamber, and an operating state of the engine are detected. An exhaust gas comprising: a detection means; and a control means for outputting a valve opening signal to the injection means based on the output of the detection means, and is configured to inject liquid oxygen into a combustion chamber during acceleration operation of the engine. Engine with turbocharger.