Oct 24, 2014 VW L-Jetronic Fuel Injection Workshop Title: VW L-Jetronic Fuel Injection Workshop Manual Author: Robert Bosch Mono-Jetronic Operation - LE/LE2/LU-Jetronic T LE/LE2/.The LE/LE2/LU-Jetronic system is a development of the earlier Bosch L-Jetronic fuel injection system. Mechanical fuel injection - Bosch K-Jetronic, Bosch K Jetronic Fig. 6.4 Figure 6.4 shows the fuel distributor, primary pressure regulator and air flow sensor from the Bosch K Jetronic system. The following table is a guide to the fuel paths marked by each blue arrow in figure 6.4. A To fuel injectors B To warm up regulator. Read Book Bosch Mono Jetronic Manual Seadartassociates to log on them. This is an utterly simple means to specifically get guide by on-line. This online broadcast bosch mono jetronic manual seadart can be one of the options to accompany you once having other time. It will not waste your time. Resign yourself to me, the e-book will definitely.
The single injector of the Mono-Jetronic system, Fig. 12.34, like that of the GM Rochester TBI system, Fig. 12.36, injects intermittently into the air intake, just above the throttle valve. A rotary, virtually pulse-free, electric pump in the fuel tank delivers at a pressure of 1 kN/m2 through a fine filter
Bosch Jetronic Fuel Injection
1 Electric fuel pump
2 Tank
3 Filter
4 Air temperature sensor
5 Single point injector
6 Pressure regulator
7 Electronic control unit
8 Throttle valve actuator
9 Throttle valve potentiometer
10 Lambda sensor
11 Engine temperature sensor
12 Ignition distributor
13 Battery
14 ignition and starter switch
1 Electric fuel pump
2 Tank
3 Filter
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4 Air temperature sensor
5 Single point injector
6 Pressure regulator
7 Electronic control unit
Fig. 12.34 The diagram issued by Bosch to injection system
8 Throttle valve actuator
9 Throttle valve potentiometer
10 Lambda sensor
11 Engine temperature sensor
12 Ignition distributor
13 Battery
14 ignition and starter switch illustrate their Mono-Jetronic single-point to the injector. By virtue of its low output pressure, this pump is both light and very economical to manufacture, many of its components being of plastics.
The spray pattern is such that two jets are delivered, Fig. 12.35, one into each of the crescent-shaped gaps between the edges of the throttle valve and its cylindrical housing. Fine atomisation ensures that, even with the throttle wide open, the mixture distribution is homogeneous. Fuel in excess of requirements is returned to the tank, the continuity of supply preventing formation of vapour locks. Each injection is triggered synchronously by the ignition system and is timed to continue for periods of from 1 ms upwards, according to the quantity of fuel needed.
The input to the electronic controller includes signals of engine speed (from the ignition distributor), throttle valve position, and engine air intake temperatures. Stored in its memory is the information it needs for use, in association with the input signals, for calculating the time the injector is required to remain open for supplying the quantity of fuel appropriate for efficient operation of the engine.
The controller is programmed to enrich the mixture for cold starting, warm-up and acceleration. In response to signals from the various electric circuits, the engine temperature and speed sensors, an electric motor adjusts
Electric connection
Electric connection
Coil
Bosch K Jetronic Troubleshooting
Coil
I Fuel return
I Fuel supply
Fig. 12.35 Bosch low-pressure injector with twin jets for injecting the spray into the two crescent-shaped openings on each side of the throttle valve as it opens
Bosch Jetronic Computer
I Fuel return
I Fuel supply
Fig. 12.35 Bosch low-pressure injector with twin jets for injecting the spray into the two crescent-shaped openings on each side of the throttle valve as it opens the position of the throttle stop to set the idle speed at an appropriately low level, regardless of what loads are switched in or out. As a contribution to fuel economy and reduction of emissions a fuel cut-off operates the idling system in the overrun condition and, if required in any particular application, at maximum engine speed. Compensation is effected for variations in the voltage of the output from the battery.
Continue reading here: 1224 The GM Multec singlepoint system
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Description
Gasoline Fuel-Injection System Mono-Jetronic Bosch Technical Manual
NEW for VW, Audi, Citroen, Peugeot, Fiat, Lancia. Fuel-management systems, system over-view, operation-data acquisition and processing, central injection unit, Mono-Motronic
Bosch literature sets the standard for concise explanations of the function and engineering of automotive systems and components: from Fuel Injection, to Anti-lock Braking Systems, to Alarm Systems.
The familiar yellow Technical Instruction series from Bosch have long proved one of their most popular instructional aids. They provide a clear and concise overview of the theory of operation, component design, model variations, and technical terminology for the entire Bosch product line, and give a solid foundation for better diagnostics and servicing.
Clearly written and illustrated with photos, diagrams and charts, these books are equally at home in the vocational classroom, apprentice’s toolkit, or enthusiast’s fireside chair. If you own a car, especially a European one, you have Bosch components and systems.
Bosch Mono Jetronic Manually
Each book deals with a single system, including a clear explanation of that system’s principles. They also include circuit diagrams, an explanation of the Bosch model numbering system, and a glossary of technical terms.
Softcover
by Bosch Technical Library
8 1/4 in. by 11 5/8 in.
49 pages