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The prewarming and running process of the engine Oct 30, 2017

China's automobile manufacturing industry has developed rapidly, and still has a strong development space. With the rapid growth of the automobile market, domestic engine market has also shown a vigorous development in recent years.

 

Since the engine is such an important device, what should be noted in prewarming and running process of the engine? The following is a brief introduction.

 

A. Prewarming for the engine

After the engine has started, it takes some time to form oil layer between crankshaft and bearing, pistons and cylinder jackets. Perfect clearance between motion parts can be gained when all the parts reach their normal working temperature. Therefore, as the heating of the engine, increase the speed from650r/min to 1000-1200r/min to warm the engine up. The engine is allowed to operate at full load only when its outlet water temperature exceeds 55℃, oil temperature over 45℃.

 

B. Run-in for the engine

For a new engine or an engine after overhaul, the engine must run in for 60 hours before it can be put into full load operation. Otherwise, it may greatly affect the use and lifetime of the engine.

 

Users should do run-in as following chart(60h in total):

Sequence No.

Speed(r/min)

Load (rating power %)

Run-in time

(h)

Total time

(h)

1

700-1500

0

0.25

0.25

2

1500

0

0.25

0.5

3

1500

25%

0.25

0.75

4

1500

50%

1.75

2.5

5

1500

75%

45

47.5

6

1500

90%

5.0

52.5

7

1500

100%

3.0

55.5

8

1500

75%

3.0

58.5

9

1500

50%

1.0

59.5

10

1500

25%

0.5

60.0

Note:

1. In run-in period, pay attention to the exhaustsmoke, sounds and heat condition. Settle abnormal situation immediately.

2. In run-in period, pay attention to the oil pressure, oil temperature and exhaust cooling water temperature which should be accordance with the instructions.

3. Inspect readings of the meter frequently.

4. Renew the lubricating oil after run-in period.