Search

CN-121993284-A - Engine variable tumble air inlet system

CN121993284ACN 121993284 ACN121993284 ACN 121993284ACN-121993284-A

Abstract

The invention discloses an engine variable tumble air inlet system, which relates to the technical field of automobile engines and comprises an air inlet channel, a flow guide body and a control system. The air inlet channel is used for conveying air flow to the combustion chamber. The flow guide body is positioned in the air inlet channel and comprises an upstream part, a downstream part and a joint part. The downstream end of the upstream part is fixedly connected with a first rotating shaft, and the upstream end of the downstream part is fixedly connected with a second rotating shaft. The first rotating shaft and the second rotating shaft are rotatably arranged on the side wall of the air inlet channel. The connecting portion is located between the upstream portion and the downstream portion, so that the fluid guide body can be arched, and the arched protruding direction faces the axis of the air inlet channel. The control system comprises a rotation speed sensor, an actuator and a controller. The rotation speed sensor is used for monitoring the real-time rotation speed of the engine and transmitting the real-time rotation speed to the controller. The actuator is used for driving the first rotating shaft and the second rotating shaft to rotate. The controller is used for controlling the action of the actuator. The invention can meet the torque power requirements under different rotating speeds through the adjustment of the actual flow area and the change of the tumble ratio in the combustion chamber.

Inventors

  • HE LING
  • ZHANG MEIJIAO
  • SUN PING
  • DONG WEI
  • Luo Chuanzheng
  • GUO XINYANG
  • SHI WEIBO
  • LI ZIHANG

Assignees

  • 吉林大学

Dates

Publication Date
20260508
Application Date
20260402

Claims (10)

  1. 1. An engine variable tumble intake system (100), characterized by comprising: An air inlet passage (18) for delivering an air flow to the combustion chamber (2), the width direction of the air inlet passage (18) being perpendicular to the axial direction of the combustion chamber (2); The device comprises an air inlet channel (18), a flow guide body (19), a connecting part (16) and a connecting part (18), wherein the air inlet channel comprises an upstream part (15), a downstream part (17) and a connecting part (16), a first rotating shaft (11) is fixedly connected to the downstream end of the upstream part (15), a second rotating shaft (10) is fixedly connected to the upstream end of the downstream part (17), the first rotating shaft (11) and the second rotating shaft (10) are parallel to the width direction of the air inlet channel (18), are positioned on the same side of the axis of the air inlet channel (18) and are rotatably arranged on the side wall of the air inlet channel (18), the connecting part (16) is positioned between the upstream part (15) and the downstream part (17), the self upstream end of the connecting part is integrally connected to the downstream end of the upstream part (15), and the self downstream end of the connecting part is integrally connected to the upstream end of the downstream part (17) or is connected to the upstream end of the downstream part (17) in a gap, so that the flow guide body (19) can be arched, and the arch direction faces the axis of the air inlet channel (18); The control system comprises a rotation speed sensor, an actuator and a controller, wherein the rotation speed sensor is used for monitoring the real-time rotation speed of an engine and transmitting the real-time rotation speed to the controller, the actuator is used for driving the first rotating shaft (11) and the second rotating shaft (10) to rotate so that the bending degree of the arch can be adjusted, and the controller is used for controlling the action of the actuator so that the bending degree of the flow guide body (19) is inversely related to the real-time rotation speed in a preset real-time rotation speed range.
  2. 2. The engine variable tumble intake system (100) according to claim 1, characterized in that: The upstream portion (15) comprises a first guide plate (9), the downstream portion (17) comprises a second guide plate (7), the connecting portion (16) comprises a third guide plate (8), a gap is reserved between the upstream end of the third guide plate (8) and the first guide plate (9), and a gap is reserved between the downstream end of the third guide plate (8) and the second guide plate (7).
  3. 3. The engine variable tumble intake system (100) according to claim 2, characterized in that: The upstream part (15) further comprises two side baffle plates I (12), wherein the two side baffle plates I (12) are fixedly connected to the two lateral side edges of the guide plate I (9) respectively and are positioned on one side of the guide plate I (9) close to the axis of the air inlet channel (18); the downstream part (17) further comprises two side baffles (13), wherein the two side baffles (13) are fixedly connected to the two lateral side edges of the second guide plate (7) respectively and are positioned on one side, close to the axis of the air inlet channel (18), of the second guide plate (7); The connecting part (16) further comprises two side baffle plates III (14), and the two side baffle plates III (14) are respectively and fixedly connected to the two lateral side edges of the guide plate III (8) and are positioned on one side of the guide plate III (8) close to the axis of the air inlet channel (18).
  4. 4. The engine variable tumble intake system (100) according to claim 3, characterized in that: The first rotating shaft (11) passes through the first side baffle (12) and is fixedly connected with the first side baffle (12), and the first rotating shaft (11) passes through the third side baffle (14) and is rotationally connected with the third side baffle (14); the second rotating shaft (10) penetrates through the second side baffle plate (13) and is fixedly connected with the second side baffle plate (13), and the second rotating shaft (10) penetrates through the third side baffle plate (14) and is rotatably connected with the third side baffle plate (14).
  5. 5. The engine variable tumble intake system (100) according to claim 4, characterized in that: the two ends of the connecting part (16) in the width direction are respectively embedded into corresponding positioning grooves on the inner wall of the air inlet channel (18), the side baffle I (12) and the side baffle II (13) are both positioned between the two side baffles III (14), and the swinging action is not limited by the positioning grooves.
  6. 6. The engine variable tumble intake system (100) according to claim 5, characterized in that: the engagement portion (16) is in interference fit with the positioning groove, and the positioning groove is coated with a wear-resistant coating.
  7. 7. The engine variable tumble intake system (100) according to claim 1, characterized in that: The upstream part (15) comprises a first diversion cloth and a first frame, the downstream part (17) comprises a second diversion cloth and a second frame, and the connecting part (16) comprises a third diversion cloth, wherein the upstream end of the third diversion cloth is integrally connected with the first diversion cloth, and the downstream end of the third diversion cloth is integrally connected with the second diversion cloth; the first frame is fixedly connected with the outer edge of the first diversion cloth, the first rotating shaft (11) is fixedly connected with the first frame, the second frame is fixedly connected with the outer edge of the second diversion cloth, and the second rotating shaft (10) is fixedly connected with the second frame.
  8. 8. The engine variable tumble intake system (100) according to claim 1, characterized in that: the first rotating shaft (11) and the second rotating shaft (10) synchronously rotate reversely.
  9. 9. The engine variable tumble intake system (100) according to claim 1, characterized in that: At least the upstream end of the upstream portion (15) abuts against the inner wall of the intake duct (18) when the degree of bending of the flow guide body (19) is maximized.
  10. 10. The engine variable tumble intake system (100) according to claim 9, characterized in that: The included angle between the upstream part (15) and the joint part (16) is equal to the included angle between the downstream part (17) and the joint part (16), and the included angle is not more than 60 degrees.

Description

Engine variable tumble air inlet system Technical Field The invention relates to the technical field of automobile engines, in particular to an engine variable tumble air inlet system. Background With the rapid development of the automobile industry, the market has put higher and higher demands on the power performance, fuel economy and emission index of the engine. The combustion efficiency of the engine directly influences the power output and the fuel consumption of the engine, and the airflow motion state in the combustion chamber is one of key factors for determining the combustion efficiency, wherein the tumble is used as an important airflow motion form in the combustion chamber, so that the uniformity of oil-gas mixing can be promoted, the combustion rate can be accelerated, and the combustion sufficiency can be improved. The design of the tumble ratio of the air inlet structure of the existing engine is usually optimized only for a specific rotating speed interval. In the low-rotation-speed working condition, strong tumble is needed to promote oil-gas mixing to ensure combustion stability, and in the high-rotation-speed working condition, excessive tumble can increase air inlet resistance, so that insufficient air inflow is caused, and the power output of an engine is influenced. The fixed air inlet channel structure can not flexibly adjust the tumble ratio in the combustion chamber according to the working requirements of the engine at different rotating speeds, so that the engine is difficult to simultaneously consider the power performance and the fuel economy in the full rotating speed range, and obvious performance short plates exist. Disclosure of Invention The invention aims to provide a variable tumble air inlet system of an engine, which solves the problems of the related art, and meets the requirements of torque power at different rotating speeds through the adjustment of the actual flow area and the change of the tumble ratio in a combustion chamber. In order to achieve the above object, the present invention provides the following solutions: the invention discloses a variable tumble air inlet system of an engine, which comprises: the width direction of the air inlet channel is perpendicular to the axis direction of the combustion chamber; The device comprises an air inlet, a flow guide body, a connecting part, a first guide body, a second guide body, a third guide body, a first guide body, a second guide body and a second guide body, wherein the upstream end of the upstream part is fixedly connected with a first rotating shaft, the upstream end of the downstream part is fixedly connected with a second rotating shaft, the first rotating shaft and the second rotating shaft are parallel to the width direction of the air inlet, are positioned on the same side of the axis of the air inlet, and are rotatably arranged on the side wall of the air inlet; The control system comprises a rotating speed sensor, an actuator and a controller, wherein the rotating speed sensor is used for monitoring the real-time rotating speed of an engine and transmitting the real-time rotating speed to the controller, the actuator is used for driving the first rotating shaft and the second rotating shaft to rotate so that the bending degree of the arch can be adjusted, and the controller is used for controlling the action of the actuator so as to enable the bending degree of the guide body to be inversely related to the real-time rotating speed in a preset real-time rotating speed range. In some examples, the upstream portion includes a first baffle, the downstream portion includes a second baffle, the engagement portion includes a third baffle, a gap is left between an upstream end of the third baffle and the first baffle, and a gap is left between a downstream end of the third baffle and the second baffle. In some examples, the upstream portion further includes two side guards, one fixedly attached to each of the lateral side edges of the first baffle and located on a side of the first baffle that is adjacent to the axis of the inlet; the downstream part also comprises two side baffles II, wherein the two side baffles II are respectively and fixedly connected with the edges of the two transverse sides of the guide plate II and are positioned on one side of the guide plate II, which is close to the axis of the air inlet channel; the connecting part further comprises two side baffles III which are fixedly connected to the edges of the two transverse sides of the guide plate III respectively and are positioned on one side of the guide plate III, which is close to the axis of the air inlet channel. In some examples, the first rotating shaft passes through the first side baffle and is fixedly connected with the first side baffle; the first rotating shaft penetrates through the third side baffle plate and is in rotating connection with the third side baffle plate; the second rotating shaft penetrates through the second