CN201133283Y - A New Device for Improving Air Intake of Internal Combustion Engine - Google Patents

Abstract

The utility model belongs to the technical field of internal combustion engines, in particular to a novel device for improving the air intake of internal combustion engines. The utility model comprises an intake manifold and a first air filter and a turbocharger arranged sequentially along the intake direction of the main intake pipe. The front end of the intake manifold is provided with a Or parallel jet pump, the jet pump is controlled by ECU. The utility model can increase the air pressure in the intake manifold, increase the inflation coefficient in the cylinder at the moment of acceleration, thereby changing the low-speed combustion conditions of the internal combustion engine, and changing the problem of poor low-speed acceleration performance in the turbocharger, and improving the output at medium and low speeds torque, optimize the acceleration performance, and greatly shorten the acceleration response time of the vehicle; at the same time, because the fuel is fully burned, the utilization rate of the fuel is also improved, and the emission of the internal combustion engine is reduced.

Description

A New Device for Improving Air Intake of Internal Combustion Engine

technical field

The utility model belongs to the technical field of internal combustion engines, in particular to a novel device for improving the air intake of internal combustion engines.

Background technique

At present, the use of supercharging technology to increase the charge density of internal combustion engines has become one of the most effective strengthening measures to increase the power of a single diesel engine. Existing exhaust gas turbocharged internal combustion engines for vehicles mostly use pulsed exhaust gas turbochargers. When the internal combustion engine is operating at a low-to-medium speed, the vehicle suddenly steps on the accelerator pedal, because the exhaust gas flow cannot be increased to the corresponding flow at the same time to drive the compressor. , causing insufficient air intake in a short period of time, deterioration of combustion, and insufficient power. That is to say, it usually takes a while for the internal combustion engine to accelerate significantly when the driver depresses the accelerator pedal under medium and low speed conditions. The reason for this is that the exhaust gas turbine needs a response time (that is, the time for the exhaust gas flow rate to gradually increase) to increase the speed, which causes a lag in turbocharging, resulting in poor acceleration performance of the exhaust gas turbocharged internal combustion engine vehicle .

Utility model content

The purpose of this utility model is to solve the above-mentioned deficiencies in the prior art, to provide a new device for improving the air intake of internal combustion engines, which can change the combustion conditions of low-load internal combustion engines, improve the output torque and acceleration performance of the engine at low speeds, and at the same time reduce the Emissions from internal combustion engines.

In order to achieve the above object, the technical solution of the utility model is: a device for improving the air intake of an internal combustion engine, including an intake manifold and a first air filter and a turbocharger arranged in sequence along the air intake direction of the main intake pipe. engine, the front end of the intake manifold is provided with a jet pump connected in series or in parallel with the turbocharger, and the jet pump is controlled by the ECU.

It can be seen from the above that since the front end of the intake manifold is provided with an air jet pump connected in series or in parallel with the turbocharger, and the air jet pump is controlled by the ECU, when the accelerator pedal is stepped on, the ECU will The data turns on the jet pump, injects fresh air into the intake pipe, increases the air pressure in the intake manifold, and increases the gas charge coefficient in the cylinder at the moment of acceleration, thereby improving the combustion condition of the internal combustion engine at low speed and changing the low speed acceleration performance of the turbocharger. To solve the problem, improve the output torque of the engine at medium and low speeds, optimize the acceleration performance, and greatly shorten the acceleration response time of the vehicle; at the same time, because the fuel is fully burned, the fuel utilization rate is also improved and the emission of the internal combustion engine is reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

As shown in Figure 1, a new type of device for improving the air intake of an internal combustion engine includes an intake manifold 4 and a first air filter 2A and a turbocharger 7 arranged in sequence along the intake direction of the intake main pipe 5, It is characterized in that: the front end of the intake manifold 4 is provided with a jet pump 1 connected in series or in parallel with the turbocharger 7, and the jet pump 1 is controlled by an ECU.

As a preferred solution of the present invention, the jet pump 1 is arranged at the intake end of the first air filter 2A. In this manner, the gas ejected from the air jet pump 1 can be purified through the first air filter 2A, thereby better achieving the purpose of the utility model.

As another preferred solution of the present utility model, the air jet pump 1 is connected in series with the turbocharger 7 and connected in parallel with the first air filter 2A, and the air intake end of the air jet pump 1 is provided with a second air filter Cleaner 2B. This arrangement makes the outlet of the jet pump 1 be arranged between the turbocharger 7 and the first air filter 2A, which can also achieve the purpose of the utility model. In order to make the internal combustion engine run better, it is necessary to pressurize The gas is purified, so the program is provided with a second air filter 2B at the intake end of the jet pump 1.

As another preferred solution of the present utility model, the jet pump 1 is connected in parallel with the turbocharger 7, and the outlet of the jet pump 1 is arranged between the turbocharger 7 and the intercooler 8, and the jet pump 1 The intake end of the air intake is provided with a second air filter 2B.

The jet pump 1 is connected in parallel, which can avoid the possible mutual interference between the jet pump 1 and the turbocharger 7 when connected in series, and can better realize the purpose of the utility model; the outlet of the jet pump 1 Installed on the pipeline between the turbocharger 7 and the intercooler 8, the fresh air ejected from the jet pump 1 can be mixed with the high-temperature gas compressed by the turbocharger 7, thereby preheating the fresh air on the one hand On the other hand, the temperature of the high-temperature gas can also be reduced to reduce the load of the intercooler 8. In this case, the front end of the jet pump 1 also needs to be provided with a second air filter 2B to purify the air.

As another preferred solution of the present utility model, the jet pump 1 is connected in parallel with the turbocharger 7, the outlet of the jet pump 1 is arranged at the inlet of the intake manifold 4, and the intake end of the jet pump 1 A second air cleaner 2B is provided.

This arrangement can increase the fresh air into the internal combustion engine when the jet pump 1 is turned on, which further increases the corresponding speed when the vehicle accelerates and reduces the corresponding time of the vehicle.

As a further preferred solution of the present invention, the angle between the air intake branch pipe 3 where the jet pump 1 is located and the intake main pipe 5 where the turbocharger 7 is located is less than 90° along the air intake direction.

When the angle between the intake branch pipe 3 and the intake main pipe 5 is small, the airflow in the two pipelines can be mixed and entrained in the form of jet flow, which reduces the turbulence loss caused by mixing at a large angle, which is beneficial to the flow in the pipeline. The stability of the airflow, and thus improve the combustion performance of the engine.

The time for the ECU to control the opening or closing of the jet pump 1 can be preset according to experimental data. When the accelerator pedal of the vehicle is stepped on and the ECU detects the change of the oil quantity control structure, it judges the instantaneous speed and working condition of the engine, compares it with the preset parameters, and decides to turn on or turn off the jet pump 1 .

As shown in Figure 1, the gas after increasing the flow enters the intake main pipe 5 through the intake branch pipe 3, and then enters the intake manifold 4, and is discharged from the engine through the exhaust manifold 6 after combustion, thereby changing the turbocharger. To solve the problem of poor acceleration performance at low speeds, increase the output torque at low and medium speeds and optimize acceleration performance.

Claims (6)

1, a kind of novel device that improves air-intake of combustion engine, comprise intake manifold (4) and first air-strainer (2A) and the turbocharger (7) that set gradually along the airintake direction of air inlet main (5), it is characterized in that: the front end of described intake manifold (4) is provided with jet pump (1) in parallel with turbocharger (7) or that connect, and jet pump (1) is controlled by ECU.

2, the novel device that improves air-intake of combustion engine according to claim 1, it is characterized in that: described jet pump (1) is arranged on the inlet end of first air-strainer (2A).

3, the novel device that improves air-intake of combustion engine according to claim 1, it is characterized in that: described jet pump (1) is in series and is in parallel with first air-strainer (2A) with turbocharger (7), and the inlet end of jet pump (1) is provided with second air-strainer (2B).

4, the novel device that improves air-intake of combustion engine according to claim 1, it is characterized in that: described jet pump (1) is in parallel with turbocharger (7), the outlet port of jet pump (1) is arranged between turbocharger (7) and the intercooler (8), and the inlet end of jet pump (1) is provided with second air-strainer (2B).

5, the novel device that improves air-intake of combustion engine according to claim 1, it is characterized in that: described jet pump (1) is in parallel with turbocharger (7), the outlet port of jet pump (1) is arranged on the ingress of intake manifold (4), and the inlet end of jet pump (1) is provided with second air-strainer (2B).

6, according to each described novel device that improves air-intake of combustion engine of claim 3～5, it is characterized in that: the air inlet main (5) at the air intake branch (3) at described jet pump (1) place and turbocharger (7) place along angle that airintake direction became less than 90 °.

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