FIELD: engines and pumps.
SUBSTANCE: internal combustion engine (1) comprises mechanism (2) of variable compression ratio and fuel injection device with common fuel line using fuel pump (46) of high pressure, which has a mechanical drive. Fuel pressure (P) in common fuel line (45) is read (step 1). When fuel pressure (P) exceeds upper limit fuel pressure (Pmax) (step 4), a conclusion is made on abnormal high fuel pressure (P). Target compression ratio by variable compression degree mechanism is installed on minimum degree (εmin) of compression (step 6). Change of crankshaft (21) rotation becomes low. Change in chain (43) tension is reduced.
EFFECT: protection of chain (43) in abnormal fuel pressure during operation of internal combustion engine.
4 cl, 4 dwg
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