ME-SFI limiting maximum engine speed function - GF07.61-P-3007F
ENGINE 104.941 /943 /944 /991 /994as of 1.8.96
ENGINE 104.995 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 with CODE (498) as of Model year 97 Japanese version
ENGINE 111.921 /942 as of 1.9.98, 111.943, 111.944 as of 1.8.96, 111.946 as of 1.6.98, 111.947 /973, 111.975 as of 1.8.96
ENGINE 111.945 in MODEL 208.335/435 as of 1.6.98, 202.020 /080 as of 1.9.98
ENGINE 111.974 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998
ENGINE 112.910 /911 /912 /913 /914 /916 /917 /920 /921 /922 /923 /940 /941 /942 /943 /944 /946 /947 /949 /953 /954 /955 /970 /972 /973 /975
ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /969
ENGINE 119.980 /981 /982 /985
ENGINE 120.982/ 983
ENGINE 137.970
Shown on engine 119 in model 210
Task
Limiting maximum engine speed
Function
The ME-SFI control unit detects the engine speed from the signal supplied by the crankshaft position sensor. Engine speed is limited by shutting off the fuel injectors in the following conditions as a protection for the engine and the drive train:
- Torque converter protection in selector lever position P/N
Engine speed is limited (e.g. to approx. 3800 rpm for engine 120) in order to protect the torque converter from excessive static inner pressure in selector lever position P and N (no power flow).
- Limiting maximum engine speed when driving
In order to protect the engine from the consequences of impermissibly high revs, engine speed is limited to 6200 rpm and, after a further 10 seconds, to approx. 6000 rpm (e.g. engine 120). The vehicle speed information for detecting the drive mode is received by the ME control unit via CAN from the control unit for traction system (ABS, ASR, ETS or SPS, according to model and equipment).
- Safety fuel shutoff
If the throttle valve actuator is faulty, the fuel injection valves are shut off at engine speeds of approx. >1400 rpm, and operated again at approx. <1200 rpm (engine surges greatly).
| Motor electronics control unit, location/task/design/function | GF07.61-P-5000F | ||
| Crankshaft position sensor, location/task/design/function | GF07.04-P-4116F | ||
| ME-SFI safety fuel shutoff function | GF07.61-P-3018F | ||
| ETC control unit, location/task | Selector lever position information P/N and driving position engaged. Transmission 722.6 |
GF27.19-P-4012G |