CN102519728A - Function test device and method of engine variable valve timing (VVT) system - Google Patents
Function test device and method of engine variable valve timing (VVT) system Download PDFInfo
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- CN102519728A CN102519728A CN2011104462699A CN201110446269A CN102519728A CN 102519728 A CN102519728 A CN 102519728A CN 2011104462699 A CN2011104462699 A CN 2011104462699A CN 201110446269 A CN201110446269 A CN 201110446269A CN 102519728 A CN102519728 A CN 102519728A
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Abstract
The invention relates to a function test device and a function test method of an engine variable valve timing (VVT) system, wherein the function test device comprises crocodile clips, a lead and a phase control valve plug-in unit, one end of the lead is divided into two branches to be connected with a pair of crocodile clips, the other end of the lead is connected with the phase control valve plug-in unit, one crocodile clip is used for being connected with an external power source, the other crocodile clip is used for grounding, and the phase control valve plug-in unit is connected with a phase control valve of the VVT system. The device and the method have the advantages that the structure is simple, the design is reasonable, the cost is low, the test method has simple processes, is easy to use, whether the function of the engine VVT system is ineffective or not can be judged through dependently controlling the phase control valve during the development period of a VVT engine under the premise of no VVT drive data, the development period of the engine is shortened, and the research and development of new products are promoted.
Description
Technical field
The present invention relates to a kind of engine VVT System Functional Test device and method of testing, belong to motor car engine maintenance and detection technique field.
Background technology
At present, along with the continuous development of automotive engineering, variable valve timing (VVT) technology can significantly improve charging efficiency, increases engine capacity, being applied in the motor car engine field more and more widely.But because the not visual property of engine VVT system; In the development stage of VVT engine; Owing to there are not electronic control unit (ECU) data of complete coupling; Whether prove effective and effectively to judge for engine VVT systemic-function, may development, the production schedule of new product engine be produced serious influence; If its VVT function broke down after the VVT engine was criticized and produced, often need come whether fault is judged to it through the failure diagnostic apparatus of specialty, the process more complicated, and cost is high.
Summary of the invention
The objective of the invention is to overcome the weak point that exists in the above-mentioned technology, provide a kind of simple in structure, reasonable in design, cost is low, engine VVT System Functional Test device and method of testing easy to use.In order to achieve the above object; The technical scheme that the present invention adopts is: it comprises crocodile clip, lead and phase control valve plug-in unit; Lead one end is divided into two and connects a pair of crocodile clip; The other end connects phase control valve plug-in unit, and of crocodile clip is used to connect external power source, one and is used for ground connection, and phase control valve plug-in unit connects the phase control valve of VVT system.Adopt following steps: a, starting engine, the engine operate as normal; B, the correct wiring of proving installation, two crocodile clips are connected external power source and ground connection respectively, and phase control valve plug-in unit is plugged on the phase control valve of VVT system, and external power source is independently-powered to the phase control valve; C, observation engine capacity, torque change, if significant change takes place, the VVT systemic-function is normal; Otherwise, the VVT system failure then.Advantage of the present invention is: 1, simple in structure, reasonable in design, cost is low, and the method for testing process is easy, uses easily; 2, can not have under the prerequisite of VVT driving data in the development stage of VVT engine,, whether engine VVT systemic-function was lost efficacy judge, shorten the engine R&D cycle, promote research and development of new product through the independent of phase control valve controlled.
Description of drawings
Fig. 1 is a structural representation of the present invention; Fig. 2 is the oil circuit constitutional diagram of the VVT of VVT system function when not opening; Fig. 3 uses VVT function of the present invention to open back VVT system oil-way constitutional diagram.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.Can know by Fig. 1-Fig. 3; It comprises crocodile clip 1, lead 2 and phase control valve plug-in unit 3 the present invention; Lead 2 one ends are divided into two and connect a pair of crocodile clip 1; The other end connects phase control valve plug-in unit 3, and of crocodile clip 1 is used to connect external power source, one and is used for ground connection, and phase control valve plug-in unit 3 connects the phase control valve of VVT systems.Adopt following steps: a, starting engine, the engine operate as normal; B, the correct wiring of proving installation, two crocodile clips are connected external power source and ground connection respectively, and phase control valve plug-in unit is plugged on the phase control valve of VVT system, and external power source is independently-powered to the phase control valve; C, observation engine capacity, torque change, if significant change takes place, the VVT systemic-function is normal; Otherwise, the VVT system failure then.Principle of work of the present invention is: as shown in Figure 2; The VVT system mainly contains compositions such as oil pan 4, pressure regulator valve 5, lubricating oil pump 6, phase control valve 9, oil cylinder rotor 11, camshaft 12 and relevant oil circuit; Oil pan 4 is used for oil storage; Pressure regulator valve 5 is used to set up oil circuit pressure, and lubricating oil pump 6 is used to produce pressure oil, converts free state oil 7 to high pressure conditions oil 8.Phase control valve 9 is the key components and parts of VVT system; It comes down to a straight moving electromagnetic valve, and its principle of work is that solenoid energising back produces magnetic field, and electromagnetic force makes actuating mechanism produce rectilinear motion; Its working method is pulsation; Through the dutycycle of control pulsation, change the average current of coil in the solenoid valve, and then change the electromagnetic force that produces; Electromagnetic force makes compression fixing spring to electromagnetic force unshakable in one's determination and spring force equilibrium position, controls the sectional area and the flow direction of VVT oil circuit through the change of position unshakable in one's determination, and then controls the flow and the flow direction of VVT system oil-way; Oil flow rate through control VVT assembly rotor 11 both sides makes it with respect to stator 13 rotation relatively take place, from realizing phase adjusted.Rotor 11 links to each other with camshaft 12, and stator 13 links to each other with sprocket wheel 14.Do not switch at phase control valve 9, phase control valve 9 inner iron cores are in high order end under the spring force effect, and this moment, VVT system high pressure state oil 8 was input, and low-pressure state oil 10 is output, and engine is in the state of running up.The present invention directly offers direct supply of phase control valve; Can ignore the duty cycle signals that ECU provides; Through the solenoid valve aperture is adjusted to maximum; Make the change of port timing generation amplitude peak,, carry out the VVT function and whether effectively judge then through identification to the engine operation stability.As shown in Figure 3; When using proving installation of the present invention; The correct wiring of proving installation, two crocodile clips 1 are connected external power source and ground connection respectively, and phase control valve plug-in unit 3 is plugged on the phase control valve 9 of VVT system; This moment, external power source was independently-powered to phase control valve 9; Phase control valve 9 is under the effect of external power supply, and the electromagnetic force that coil produces under the function of current in the solenoid valve makes compression fixing spring to electromagnetic force unshakable in one's determination and spring force equilibrium position, the change of port timing generation this moment amplitude peak.VVT system low-voltage state oil 10 is input, and high pressure conditions oil 8 is output.Engine is in the low-speed running state.Engine capacity, torque generation significant change prove that change has taken place the engines distribution phase place, but the normal operation of VVT system.Otherwise the VVT system failure then can't driven camshaft 12.Proving installation external power source of the present invention can be used vehicular power-bottle 12V is provided drive current, and the length of lead 2 confirms that according to engine model phase control valve plug-in unit 3 is according to the corresponding plug-in unit of different choice of phase control valve 9.
Claims (2)
1. engine VVT System Functional Test device and method of testing; It is characterized in that: it comprises crocodile clip (1), lead (2) and phase control valve plug-in unit (3); Lead (2) one ends are divided into two and connect a pair of crocodile clip (1); The other end connects phase control valve plug-in unit (3), and of crocodile clip (1) is used to connect external power source, one and is used for ground connection, and phase control valve plug-in unit (3) connects the phase control valve of VVT system.
2. a kind of engine VVT System Functional Test device according to claim 1 and method of testing is characterized in that: adopt following steps: a, starting engine, the engine operate as normal; B, the correct wiring of proving installation, two crocodile clips are connected external power source and ground connection respectively, and phase control valve plug-in unit is plugged on the phase control valve of VVT system, and external power source is independently-powered to the phase control valve; C, observation engine capacity, torque change, if significant change takes place, the VVT systemic-function is normal; Otherwise, the VVT system failure then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104462699A CN102519728A (en) | 2011-12-28 | 2011-12-28 | Function test device and method of engine variable valve timing (VVT) system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104462699A CN102519728A (en) | 2011-12-28 | 2011-12-28 | Function test device and method of engine variable valve timing (VVT) system |
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| CN102519728A true CN102519728A (en) | 2012-06-27 |
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| CN2011104462699A Pending CN102519728A (en) | 2011-12-28 | 2011-12-28 | Function test device and method of engine variable valve timing (VVT) system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207617A (en) * | 2013-03-01 | 2013-07-17 | 铁岭天河机械制造有限责任公司 | Variable Valve Timing (VVT) controller micro detection device |
| CN103728137A (en) * | 2013-12-11 | 2014-04-16 | 力帆实业(集团)股份有限公司 | Method for detecting VVT mechanism of engine in hot running-in process of engine |
| CN108169594A (en) * | 2017-12-21 | 2018-06-15 | 江西腾勒动力有限公司 | A kind of detection device for OCV OCV Oil Control Valves |
| CN108225774A (en) * | 2017-12-28 | 2018-06-29 | 江西腾勒动力有限公司 | A kind of OCV OCV Oil Control Valves detection method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207617A (en) * | 2013-03-01 | 2013-07-17 | 铁岭天河机械制造有限责任公司 | Variable Valve Timing (VVT) controller micro detection device |
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| CN103728137A (en) * | 2013-12-11 | 2014-04-16 | 力帆实业(集团)股份有限公司 | Method for detecting VVT mechanism of engine in hot running-in process of engine |
| CN103728137B (en) * | 2013-12-11 | 2016-03-16 | 力帆实业(集团)股份有限公司 | A kind of method detecting engine vvt mechanism in the engine thermal period of adjustment |
| CN108169594A (en) * | 2017-12-21 | 2018-06-15 | 江西腾勒动力有限公司 | A kind of detection device for OCV OCV Oil Control Valves |
| CN108225774A (en) * | 2017-12-28 | 2018-06-29 | 江西腾勒动力有限公司 | A kind of OCV OCV Oil Control Valves detection method |
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Application publication date: 20120627 |