Automatic Start/Stop Of Engine

SECONDARY BATTERY RELAY 

Shows if the Central electronic module (CEM) requests from Engine control module (ECM) that the secondary battery relay should be activated or not. Central electronic module (CEM) requests activation of the relay when the secondary battery needs to be charged.

VOLTAGE SECONDARY BATTERY 

Shows secondary battery voltage.

Measurement scale: 0-18 V

When the engine is running (alternator charges) and the secondary battery is connected to the vehicle's electrical system, the secondary battery's voltage will be the same as the rest of the electrical system's voltage. If the secondary battery disconnected, the voltage will be lower.

VOLTAGE SECONDARY BATTERY, LATEST STORED 

Shows secondary battery's latest stored voltage.

Measurement scale: 0-18 V

For every new driving cycle, the Central electronic module (CEM) measure the voltage on the secondary battery and stores this value. If the vehicle has been parked with the ignition off for more than approx. 10 hours, the Central electronic module (CEM) uses the new voltage value to calculate how long time the secondary battery needs to be charged. If the vehicle has been parked with the ignition off for less than approx. 10 hours, the Central electronic module (CEM) uses the previously stored voltage value to calculate how long time the secondary battery needs to be charged.

VOLTAGE SECONDARY BATTERY, LOWEST AVERAGE VALUE 

Indicates the secondary battery's lowest stored average voltage.

Measurement scale: 0-18 V

Every time autostart is activated, the Central electronic module (CEM) continuously reads the secondary battery's voltage during the start sequence (during the time the secondary battery supplies the vehicle). The lowest value that is registered is saved by the Central electronic module (CEM) in its memory. At the next autostart, this sequence is repeated and the Central electronic module (CEM) calculates the average value of the previously registered voltage values and the last value. The average value is calculated at every autostart. This average value forms the basis for the secondary battery's SoC and capacity. If the calculated average voltage falls below 10.4 V in the actual operating cycle, the automatic start/stop of the engine function is no longer permitted. This is to prevent the battery from discharging to much.

CHARGING NEED SECONDARY BATTERY 

Shows how long time the secondary battery needs to be charged.

Measurement range: 0-65535 seconds.

Using the secondary battery's voltage at the start of the driving cycle, the Central electronic module (CEM) calculates how long time the secondary battery needs to be charged.

CHARGING TIME SECONDARY BATTERY 

Shows how long time the secondary battery has been charged during the latest driving cycle.

Measurement range: 0-65535 seconds.

TEMPERATURE SECONDARY BATTERY 

Indicates the calculated temperature of the secondary battery.

Measurement range: -40 - 215 °C.

DOWNTIME 

Shows how long time the vehicle has been parked, with the ignition off, at the last instance.

Measurement range: 0-24 hours.

VOLTAGE/POWER-SENSITIVE CONSUMERS OF ELECTRICITY 

Shows if voltage or power-sensitive consumers of electricity are activated/engaged or not. Depending on which power consumers are connected, the alternator voltage will be controlled differently. Included in the brake energy regeneration function.

Following can be shown:

- No voltage/power-sensitive consumers of electricity activated.

- Voltage sensitive consumers activated. For example: headlights, fog lights, blower fan motor, windscreen wipers.

- Voltage/power-sensitive consumers activated. E.g., electrical cooling fan motor, preheating coil, trailer connected, passenger compartment fan motor.

Depending on which power consumers are connected, the alternator voltage will be controlled differently. When voltage-sensitive consumers are activated, the alternator voltage is not allowed to vary too quickly. When voltage/power-sensitive consumers of electricity are activated, then the alternator voltage is not allowed to be lower than approx. 13.2 V. This is so that the available power will not be too low.