CN106441938A - Dynamic testing device of vehicle exhaust system - Google Patents

Abstract

The present invention provides a dynamic test device for a vehicle exhaust system, comprising a six-degree-of-freedom test bench 1, a vehicle start-stop simulation system 2, an exhaust pipe 10, an independent linear actuator 11, an engine 8 and a transmission shaft fixing fixture 6; the engine 8 is fixed on the six-degree-of-freedom test bench 1, the transmission shaft fixing fixture 6 fixes the engine output shaft 9 on the six-degree-of-freedom test bench 1, the exhaust pipe 10 is sealed and connected to the exhaust manifold of the engine 8, the independent linear actuator 11 fixes and supports the exhaust pipe 10, and the vehicle start-stop state simulation system 2 is connected to the transmission shaft fixing fixture 6. The present invention uses the full coordination of the six-degree-of-freedom test bench and the independent linear actuator to ensure that the cold and hot ends of the exhaust pipe can be dynamically simulated at the same time, and the special state of the vehicle when starting and stopping can also be simulated to achieve all-round simulation of the dynamic test device, which has the advantages of a wide simulation measurement range and convenient use.

Description

A dynamic test device for vehicle exhaust system

technical field

The invention belongs to the field of automobile detection, in particular to a dynamic test device for a vehicle exhaust system.

Background technique

Under the current technical conditions, the durability of the automobile exhaust system has become an important criterion for measuring the quality of a car. In order to do the most reliable test on the automobile exhaust system, it is necessary to comprehensively test and analyze the automobile exhaust system. Technical performance under road conditions, which requires simulating the working state of the automobile exhaust system under various road conditions.

At the same time, the entire automobile exhaust system can be divided into a hot end and a cold end. It is generally considered that the part before the flexible joint is the hot end, and the part after the flexible joint is the cold end. Generally, the hot end of the exhaust system has relatively high stiffness and high temperature, and the durability problem of the hot end is mainly caused by the vibration of the engine; for the cold end of the exhaust system, since there is a flexible The section can attenuate the vibration of the engine, so the durability of the cold end of the exhaust system is usually determined by the impact of the vehicle chassis. Therefore, to study the reliability of the automobile exhaust system, it is necessary to combine the analysis of the hot and cold ends of the automobile exhaust system, and pay attention to the influence of the engine state and the vehicle chassis state on the automobile exhaust system. Therefore, technology developers need a method that can simultaneously simulate the engine and A device for dynamic analysis and testing of the vehicle exhaust system for changes in the vehicle chassis.

Contents of the invention

In view of this, the present invention aims to propose a dynamic testing device for the exhaust system of a vehicle, so as to simultaneously simulate the changes of the engine and the chassis of the vehicle, and conduct a dynamic all-round test on the exhaust system of the vehicle.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A dynamic testing device for a vehicle exhaust system, comprising a six-degree-of-freedom test bench 1, a vehicle start-stop simulation system 2, an exhaust pipe 10, an independent linear actuator 11, an engine 8, and a transmission shaft fixing fixture 6; Set on the six-degree-of-freedom test bench 1, the transmission shaft fixing fixture 6 fixes the engine output shaft 9 on the six-degree-of-freedom test bench 1, the exhaust pipe 10 is sealed and connected with the exhaust manifold of the engine 8, and operates independently and linearly The device 11 fixedly supports the exhaust pipe 10, and the vehicle start-stop state simulation system 2 is connected with the drive shaft fixing fixture 6.

The six-degree-of-freedom test bench 1 is equipped with an engine 8, which can simulate various road conditions of the engine 8. The independent linear actuator 11 fixedly supports the exhaust pipe 10, and can simulate various possible states of the automobile chassis. The six-degree-of-freedom test bench 1 and The combined use of the independent linear actuator 11 realizes the simulated test of various conditions at the hot and cold ends of the exhaust pipe 10 .

Further, the engine 8 is fixed on the six-degree-of-freedom test bench 1 through the engine fixing jig 7; the front and rear ends of the engine 8 are respectively provided with a transmission shaft fixing jig 6 symmetrically.

Further, a vehicle start-stop state simulation system 2 is provided symmetrically on the front and rear sides of the engine 8 .

Further, a connecting rod fixed connecting seat 3 is arranged symmetrically on both sides of the front and rear of the engine 8, and one end of the connecting rod fixed connecting seat 3 is fixedly connected with the output end of the vehicle start-stop state simulation system 2 through the external force connecting rod 4, and the connecting rod is fixedly connected The other end of the seat 3 is fixedly connected with the transmission shaft fixing fixture 6 through the internal force applying connecting rod 5 .

The vehicle start-stop state simulation system 2 is a mechanical restraint device that applies a preset force to the engine to simulate the working state of the engine at the moment of starting and stopping. Clamp 6 is connected.

Further, the upper end of the independent linear actuator 11 is provided with a lifting lug 12 , and the lifting lug 12 is provided with a hook 13 , and the exhaust pipe 10 is fixedly connected with the hook 13 .

Further, six independent linear actuators 11 are distributed according to the shape of the exhaust pipe 10 .

The independent linear actuator 11 is fixedly connected with the exhaust pipe 10, which can simulate various effects of the automobile chassis on the exhaust pipe 10.

Further, the engine fixing fixture 7 is provided with an engine left suspension installation point 71 , an engine right suspension installation point 72 and an engine rear suspension installation point 73 .

The engine mounting point is designed in a U shape, which ensures that the engine fixing fixture 7 has a good fixing effect.

Compared with the prior art, a dynamic testing device of a vehicle exhaust system of the present invention has the following advantages:

A dynamic testing device for a vehicle exhaust system of the present invention comprises a six-degree-of-freedom test bench, a vehicle start-stop state simulation system and an independent linear actuator; the combined use of the six-degree-of-freedom test bench and an independent linear actuator ensures that In order to conduct dynamic simulation tests on both ends of the exhaust pipe at the same time, the vehicle start-stop state simulation system can simulate the special state of the vehicle when it starts and stops, so as to realize the all-round simulation of the dynamic test device. It has a wide range of simulation measurement, The advantages of high measurement accuracy and convenient use.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a schematic structural diagram of a dynamic testing device for a vehicle exhaust system according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of an engine fixing fixture of a dynamic testing device for a vehicle exhaust system according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of an independent linear actuator of a dynamic testing device for a vehicle exhaust system according to an embodiment of the present invention;

Fig. 4 is a functional block diagram of a dynamic testing device for a vehicle exhaust system according to an embodiment of the present invention.

Explanation of reference signs:

1-Six degrees of freedom test bench; 2-Vehicle start-stop state simulation system; 3-Connecting rod fixed connection seat; 4-External force connecting rod; 5-Inner force connecting rod; 6-Drive shaft fixing fixture; 7-Engine fixing fixture; 71-engine left mounting point; 72-engine right mounting point; 73-engine rear mounting point; 8-engine; 9-engine output shaft; 10-exhaust pipe; 11-independent linear actuator ; 12-hanging lug; 13-hook.

detailed description

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Figures 1-4, a dynamic test device for a vehicle exhaust system includes a six-degree-of-freedom test bench 1, a vehicle start-stop simulation system 2, an exhaust pipe 10, an independent linear actuator 11, an engine 8 and a transmission Shaft fixing fixture 6; engine 8 is fixed on the six-degree-of-freedom test bench 1, and the transmission shaft fixing fixture 6 fixes the engine output shaft 9 on the six-degree-of-freedom test bench 1, and the exhaust pipe 10 and the exhaust manifold of the engine 8 The pipes are sealed and connected, the independent linear actuator 11 fixedly supports the exhaust pipe 10 , and the vehicle start-stop state simulation system 2 is connected with the drive shaft fixing fixture 6 .

The six-degree-of-freedom test bench 1 is equipped with an engine 8, which can simulate various road conditions of the engine 8. The independent linear actuator 11 fixedly supports the exhaust pipe 10, and can simulate various possible states of the automobile chassis. The six-degree-of-freedom test bench 1 and The combined use of the independent linear actuator 11 realizes the simulated test of various conditions at the hot and cold ends of the exhaust pipe 10 .

In the practical application of this embodiment, the engine is first fixed on the six-degree-of-freedom test stand 1, the vehicle start-stop state simulation system 2 is connected with the six-degree-of-freedom test stand, and then the exhaust pipe 10 is connected with the engine 8 for independent linear operation. The actuator 11 supports and fixes the exhaust pipe 10, and the parameters of the six-degree-of-freedom test bench 1 and the independent linear actuator 11 are adjusted according to the test analysis to simulate various possible road conditions.

In this embodiment, the vehicle start-stop state simulation system is a vehicle start-stop state TIF system.

As shown in Figures 1-4, the engine 8 is fixed on the six-degree-of-freedom test bench 1 through the engine fixing fixture 7; the front and rear ends of the engine 8 are symmetrically provided with a transmission shaft fixing fixture 6 respectively. A vehicle start-stop state simulation system 2 is respectively arranged symmetrically on both sides of the front and back of the engine 8 .

As shown in Figure 1, a connecting rod fixed connecting seat 3 is arranged symmetrically on both sides of the front and rear of the engine 8, and one end of the connecting rod fixed connecting seat 3 is fixedly connected to the output end of the vehicle start-stop state simulation system 2 through an externally applied connecting rod 4. The other end of the rod fixing connection seat 3 is fixedly connected with the drive shaft fixing fixture 6 through the inner force applying connecting rod 5 .

The vehicle start-stop state simulation system 2 is a mechanical restraint device that applies a preset force to the engine to simulate the working state of the engine at the moment of starting and stopping. Clamp 6 is connected.

As shown in FIG. 1 , six independent linear actuators 11 are distributed according to the shape of the exhaust pipe 10 .

The independent linear actuator 11 is fixedly connected with the exhaust pipe 10, which can simulate various effects of the automobile chassis on the exhaust pipe 10.

As shown in FIG. 3 , the upper end of the independent linear actuator 11 is provided with a lifting lug 12 , and the lifting lug 12 is provided with a hook 13 , and the exhaust pipe 10 is fixedly connected with the hook 13 .

As shown in FIG. 2 , the engine fixing fixture 7 is provided with an engine left suspension installation point 71 , an engine right suspension installation point 72 and an engine rear suspension installation point 73 .

The engine mounting point is designed in a U shape, which ensures that the engine fixing fixture 7 has a good fixing effect.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.

Claims (7)

1. A dynamic testing device for a vehicle exhaust system, characterized in that: it comprises a six-degree-of-freedom test bench (1), a vehicle start-stop simulation system (2), an exhaust pipe (10), an independent linear actuator (11 ), engine (8) and drive shaft fixing fixture (6); The engine (8) is fixed on the six-degree-of-freedom test stand (1), and the transmission shaft fixing fixture (6) fixes the engine output shaft (9) on the six-degree-of-freedom test stand ( 1), the exhaust pipe (10) is sealingly connected with the exhaust manifold of the engine (8), the independent linear actuator (11) fixedly supports the exhaust pipe (10), the The vehicle start-stop state simulation system (2) is connected with the drive shaft fixing fixture (6). 2. A dynamic test device for a vehicle exhaust system according to claim 1, characterized in that: the engine (8) is fixed on the six-degree-of-freedom test bench (1) through an engine fixing fixture (7) Above; the front and rear ends of the engine (8) are symmetrically provided with one transmission shaft fixing fixture (6). 3. A dynamic testing device for a vehicle exhaust system according to claim 2, characterized in that: one vehicle start-stop state simulation system (2) is provided symmetrically on the front and rear sides of the engine (8). 4. A dynamic test device for a vehicle exhaust system according to claim 2, characterized in that: the engine (8) is symmetrically provided with a connecting rod fixed connecting seat (3) on both sides of the front and rear sides, and the connecting rod One end of the fixed connection seat (3) is fixedly connected with the output end of the vehicle start-stop state simulation system (2) through an external force connecting rod (4), and the other end of the fixed connection seat (3) is connected through an internal force connecting rod (5) is fixedly connected with the transmission shaft fixing fixture (6). 5. A dynamic testing device for a vehicle exhaust system according to claim 1, characterized in that: the upper end of the independent linear actuator (11) is provided with a lifting lug (12), and the lifting lug (12) A hook (13) is provided, and the exhaust pipe (10) is fixedly connected with the hook (13). 6. A dynamic testing device for a vehicle exhaust system according to claim 1, characterized in that six independent linear actuators (11) are arranged according to the shape distribution of the exhaust pipe (10). 7. A dynamic testing device for a vehicle exhaust system according to claim 2, characterized in that: said engine fixing fixture (7) is provided with an engine left suspension installation point (71), an engine right suspension installation point (72) and engine rear mount mounting point (73).