Diagnose
Status September 2003 (EvoBus-Service / AFT)
Page: 55 of 83
4.1.1
Target engine torque (FR)
The vehicle control (FR) interprets the accelerator pedal position and derives the target engine torque
(FR). The FR sends this request to the EGM via the CAN bus. The EGM accepts the target torque
specification of the FR when the communication between the FR and the EGM functions properly. In case
of a complete failure of the CAN communication, the fault code 0104 is entered in the fault memory. If
this fault occurs, the MR EGM goes into the so-called "CAN emergency running mode". In the CAN
emergency-running mode the CAN target torque specification of the driver is ignored and the engine
speed is increased to an idling speed of approx. 900 rpm.
Determining the target engine torque
4.1.2
Maximum current engine torque
The maximum current engine torque is equivalent to the full-load torque of the engine as a function of the
current engine speed. See the Engine performance data of the individual output variants.
4.1.3
Actual engine torque
The actual engine torque is calculated from a map in dependence on the engine speed and the air mass.
This torque is corrected as a function of the actual lambda. If the gas mass is zero, then the engine torque
is equivalent to the basic torque (engine drag torque) as a function of the engine speed.
4.1.4
Gas injection angle (Cylinder 1)
The gas injection angle is a functional variable calculated by the EGM based on the gas injection mass
and the engine speed. Gas injection begins when the angle for start of gas delivery is reached and is
carried out via the gas injection angle.
4.1.5
Angle for start of gas delivery (Cylinder 1)
The angle for the start of gas delivery is an internal process variable calculated by the EGM. The angle of
the start of gas delivery characterises the crankshaft angle before ignition TDC at which the cylinder-
selective actuation of the gas injectors begins.
Target engine torque (FR)
Target torque FR
(Request via CAN)
0
CAN error
Title:
Service EGM: Diagnosis
File:
kd_mob_01.vsd
Datum der letzten Änderung:
2001-09-13
