Page01
L-Jetronic
A gasoline fuel-injection system
°m Bosch
4 The spark-ignition engine
4 Principles of operation
4 Efficiency of the spark-ignition engine
5 The air-fuel ratio
5 Fuel-induction systems
6 L-Jetronic
6 Task
6 Advantages
7 Principle
8 Fuel system
8 Fuel pump
8 Fuel filter
9 Pressure regulator 9 Distributor pipę
9 Fuel-injection valve 10 Mixture formation
11 Control system
11 Measurable quantities and operating condition
11 Calculation of engine speed
12 Measuring the air flow
13 Cold start
14 Warm-up
14 Idle control
15 Load adaptation
15 Air-temperature adaptation
16 Additional adaptations
16 Control unit
16 Information processing and forming the injection impulses 18 The composition of the control unit
18 Electric circuitry
19 Prevention of pollutant emissions
19 Lambda closed-loop control
20 Lambda sensor
20 Further development of electronically-controlled fuel-injection systems
22 Summary
22 Suggestions for further reading
23 Technical terms
24 Test questions
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