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This is a simplified and more modern variant of L-Jetronic. The ECU was much cheaper to produce due to more modern components, and was more standardised than the L-Jetronic ECUs. As per L-Jetronic, a vane-type airflow sensor is used. [4] Compared with L-Jetronic, the fuel injectors used by LE-Jetronic have a higher impedance. [5]
In the mid-1980s, Lucas developed the 13CU system by revising the Bosch L-Jetronic system and adding an electronic diagnostics capability to comply with California Air Resources Board requirements. The design of the 13CU also deviated from the original L-Jetronic design in that it used a hot-wire air mass sensor rather than the Jetronic's ...
Mid 1980s JECS LH-Jetronic ECU. 40 pin IC bottom left is Hitachi Motorola 6800 clone, 28 pin IC (socketed) immediately right is 16kB ROM containing maps. JECS logo bottom left. Bosch first produced the Jetronic EFI system in 1967. K-Jetronic & L-Jetronic followed from around 1973 [6] which is when Nissan became involved.
K-Jetronic was a mechanical injection system, using a plunger actuated by the intake manifold pressure which then controlled the fuel flow to the injectors. [55] Also in 1974, Bosch introduced the L-Jetronic system, a pulsed flow system which used an air flow meter to calculate the amount of fuel required. L-Jetronic was widely adopted on ...
Bosch built this system under licence, and marketed it from 1967 as the D-Jetronic. [21] In 1973, Bosch introduced their first self-developed multi-point injection systems, the electronic L-Jetronic, and the mechanical, unpowered K-Jetronic. [23] Their fully digital Motronic system was introduced in 1979. It found widespread use in German ...
Pierburg 2E3 carburettor, later with electronic single-point fuel injection (SPI) and Bosch L-Jetronic or Mono-Motronic engine control unit DIN-rated motive power & torque outputs 37 kW (50 PS; 50 bhp) at 5200 rpm; 76 N⋅m (56 lbf⋅ft) at 2800 rpm (carb.) 40 kW (54 PS; 54 bhp) at 5000 rpm; 95 N⋅m (70 lbf⋅ft) at 3000 rpm (SPI)
The fuel injected version of the 2,986 cc (182.2 cu in) M30 debuted in 1971 in the E9 3.0 CSi and initially used the Bosch D-Jetronic mechanical fuel injection system. [31] In 1976, the fuel injection system was upgraded to Bosch L-Jetronic electronic fuel injection. [31]
This received the Bosch L-Jetronic system, until it was replaced by the updated LE-Jetronic towards the end of 1981. A 90 PS (66 kW) 20N version appeared in August 1977. There are also two special low-emission versions for the Swedish and Swiss markets, called the S20S and S20E , with slightly less power than their dirtier counterparts.