上海华依科技集团股份有限公司

SUMMARY

Engine NVH EOL test bench adopts professional NVH analyzer to test vibration of cylinder head, intake/discharge sides of engine without ignition of engine (cold status). Besides, Engine NVH EOL test bench monitors engine oil pressure and torque during the entire test process, and check if assembling faults and part quality faults exist or not on basis of test results.

APPLICATION

- Gasoline engine EOL test
- Diesel engine EOL test

FUNCTIONS
AND FEATURES

- Engine is not ignited during test; no coolant and fuel is needed; no exhausted gas and liquid;
- Adopt professional NVH analyzer from 3rd party (Reilhofer EOL vibration analyzer), which provides overall
analysis of vibration signal at different rotation to detect possible faults of engine rotating parts

TEST ITEM

- High Speed NVH Test - Low Speed NVH Test
- Safe Torque Monitoring - Safe Oil Pressure Monitoring

PRODUCT BEAT

- Tempo≤60s (feeding and discharging included)

PARTIALLY
DETECTABLE
DEFECT

Balance shaft locking	Ignition fault: engine cannot be started	Chain tensioner locked
Balance shaft gearing chain deviates from chain wheel	Crankshaft abnormal sound	Chain tensioner bent
Balance shaft installation deviation	Cylinder head abnormal sound	Chain tensioner cannot be charged with oil
Bearing damage (e.g main bearing, link rod bearing)	Camshaft bearing: loose bolt	No oil supply for chain tensioner
Accessory damage (e.g A/C compressor)	Dirty oil way	Swinging arm deviation
Loose camshaft installation, balance shaft installation deviation	Oil pump inlet O ring missing	Tappet hole too big
Bent exhaust valve	Loose bolt at oil pump inlet	Turbocharger damaged
Shortened chain tensioner spring	Main bearing bushing missing	Chain driving, chain wheel defected, no oil supply for chain tensioner
Broken chain tensioner spring	Hydraulic tappet cannot rise	Crankshaft unbalanced
Loose camshaft installation	Hydraulic tappet missing	Shaft bushing missing
Camshaft abnormal sound	Loose oil pump bolt	Chain driving: chain wheel defected
Camshaft geometry defects (base circle, angle, inflection point abnormal)	Oil way to hydraulic tensioner blocked	Cylinder head bearing damaged
Camshaft bearing: loose bolt, broken chain tensioner spring	Corrosion hole on cylinder tube	Left pilot and right pilot are different

SOME
CHINESE USERS

- Ganzhou plant/Nanchang plant, GETRAG Company
- ZF (Hangzhou) Transmission Plant
- Yantai plant, Shanghai Automobile Gear Works
- Chery Automobile
- Changchun plant, FAW-VOLKSWAGEN
- Chengdu plant, FAW-VOLKSWAGEN
- DCT EOL test, FAW Car

- Tsingshan Transmission Plant
- Geely Automobile
- JAC Liuan Transmission Plant
- Hefei AAM Automotive Driveline &Chassis
System Co., Ltd.
- Jinan Heavy Duty Transmission Plant
- Zhuzhou Gear Co., Ltd.
- Dongan Gearbox Plant

CLIENTS OF
REILHOFER KG