Принцип работы: автономный дополнительный обогреватель Peugeot 206 I

(1): air intake pipes

(2): combustion air blower

(3): coolant output tube

(4): стержень накаливания/контроллер пламени

(5): evaporator disc/burner

(6): разъемы

(7): блок управления с датчиками температуры

(8): heat exchanger

(9): камера сгорания

(10): exhaust gas outlet

(11): поступление топлива

(12): электрический насос для охлаждающей жидкости (independent heating version only)

(13): coolant inlet tube (independent heating version only)

(14): дозирующий насос

The equipment operates by the method known as evaporation, with heat regulation obtained by controlling the fuel supply: full load, half load and off

The metering pump supplies the evaporation burner with fuel; the blower supplies the air necessary for combustion; the ceramic glow finger produces this evaporation then goes out; the combustion continues unaided

A control unit handles temperature and time information to control the system

On independent heating equipment, the control unit also operates the water pump

Combustion air blower

Функция: allows air to enter the burner

Сопротивление: 0.5 Ω до 25 °C

Consumption at full speed 32 W (9000 об/мин)

Consumption at half speed 15 W (4500 об/мин)

Стержень накаливания/контроллер пламени

This double-filament component of the PTC (Positive Temperature Coefficient) type has 2 functions in succession

• Обеспечение испарения топлива и воспламенения смеси на стадии запуска
• Проверка наличия пламени после стадии запуска и прерывание накала в случае невоспламенения топлива

Работа

Check on presence of flame before combustion

The control unit measures the resistance of the filament

• Если сопротивление превышает 0.54 Ω Ом: the control unit considers that the filament is broken or that a flame is present before combustion
• Если сопротивление меньше 0.23 Ω: the control unit considers that there is a short circuit in the filament

In both cases it is impossible to start operation of the heating; the unit records a fault

Incandescent finger

If the resistance measured is between these 2 values, the control unit then supplies the filament with current which is intermittent

В конце времени, необходимого для появления пламени, орган больше не подключен к питанию и изменяет функцию, чтобы контролировать пламя

Сопротивление 0.5 Ω в диапазоне между 0.8 Ω и: the control unit considers that a flame is present and maintains combustion

Если сопротивление меньше 0.5 Ω: the control unit considers that the flame is not present and then initialises a new starting cycle

If at the end of the second starting cycle the flame is still not present, the control unit stops heating and records a fault

Evaporator disc/burner

Функция: fibre element allowing evaporation of the fuel

Электрический насос для охлаждающей жидкости (independent heating version only)

Функция: circulates the coolant between the matrix, the expansion bottle and the heat exchanger

Расход при максимальной частоте вращения вала: 500 л/ч

Номинальная мощность: 14 W

The water pump is supplied contiuously from the beginning of the starting cycle

Control unit/ECU

Функции

• Controls and supplies the various elements of the system (metering pump, air impeller, glow finger and water pump)
• Incorporates the heat sensors (coolant temperature sensor, thermal circuit breaker)
• Monitors the elements of the system and signals possible faults via the diagnostics line (autodiagnostic function)

Датчик температуры охлаждающей жидкости

Функция: informs the control unit of the temperature of the coolant

Термопрерыватель

Функция: this is a safety device in case of lack of coolant, at 125 °C, the heating system is stopped and the control unit signals an overheating fault

For the heating to restart, the fault must be cleared using the diagnostic equipment, the cause of the breakdown having first been corrected

Дозирующий насос

Функция: allows a supply of fuel to the burner

This is a diaphragm pump controlled by pulses of variable frequency

Сопротивление: 4 Ω

Half speed frequency: 1.5 Hz

Full speed frequency: 3.2 Hz

Цикл запуска

Additional heating fuelled by diesel

PR: максимальная скорость вращения

DR: half speed

RP: частичная скорость вращения

1: дозирующий насос

2: воздушная турбина

3: incandescent finger

4: проверьте пламя

Период - 0 до 1: self-check

Период - 1 до 2: flame controller interrogation

• Свеча накаливания переходит в режим контроля пламени
• The air impeller starts

Период - 2 до 3: 30 секунда (секунды)

• Воздушная турбина питается в режиме половины нагрузки
• The flame controller changes to glow finger function

Период - 3 до 4: 3 секунда (секунды)

• The metering pump is supplied at half speed
• The air impeller is no longer supplied
• The glow finger is supplied

Период - 4 до 5: 56 секунда (секунды)

• The metering pump is supplied at half speed
• The air impeller gradually changes to partial speed
• The glow finger is supplied

Период - 5 до 6: 15 секунда (секунды)

• The metering pump is supplied at full speed
• The air turbine is supplied at partial speed
• The glow finger is supplied

Период - 6 до 7: 50 секунда (секунды)

• The new engines sold by Parts Division will be fitted with the new assembly
• The air impeller gradually changes to half speed
• The glow finger is supplied

Период - 7 до 9: 45 секунда (секунды)

• The metering pump is supplied at full speed
• Воздушная турбина питается в режиме половины нагрузки
• Supply to the glow finger gradually stops
• Свеча накаливания переходит в режим контроля пламени

Period after 9

• The metering pump is supplied at full speed
• The air impeller is supplied at full speed
• The control unit interrogates the flame controller

If no flame is detected the control unit carries out a second starting test

If no flame is detected after a second test, the control unit then records a fault (no starting after a second test)

Independent heating fuelled by petrol

PR: максимальная скорость вращения

DR: half speed

RP: частичная скорость вращения

1: дозирующий насос

2: воздушная турбина

3: incandescent finger

4: проверьте пламя

5: насос системы охлаждения

Период - 0 до 1: self-check

Период - 1 до 2: flame controller interrogation

• Свеча накаливания переходит в режим контроля пламени
• The air impeller starts

Период - 2 до 3: 30 секунда (секунды)

• Воздушная турбина питается в режиме половины нагрузки
• The flame controller changes to glow finger function

Период - 3 до 4: 3 секунда (секунды)

• The metering pump is supplied at full speed
• The air impeller is no longer supplied
• The glow finger is supplied

Период - 4 до 6: 57 секунда (секунды)

• The metering pump is supplied at half speed then gradually changes to full speed
• The air impeller gradually changes to half speed
• The glow finger is supplied

Период - 6 до 8: 45 секунда (секунды)

• The metering pump is supplied at full speed
• Воздушная турбина питается в режиме половины нагрузки
• Supply to the glow finger gradually stops
• Свеча накаливания переходит в режим контроля пламени

Period after 8

• The metering pump is supplied at full speed
• The air impeller is supplied at full speed
• The control unit interrogates the flame controller

If no flame is detected the control unit carries out a second starting test

If no flame is detected after a second test, the control unit then records a fault (no starting after a second test)

Регулировка температуры

P: мощность

T°: burner coolant temperature

The heating operates at full power (5kW) up to a coolant temperature of A

From this temperature the heating changes to half power 2.5 kW kW

The coolant temperature varies depending on the heating requirements of the passenger compartment

If the temperature decreases down to C, the heating changes again to full power

If the temperature increases up to B, the heating stops

When the temperature falls to C, the heating starts again at full power and again changes to half power if the temperature reaches A

Последующая вентиляция

In order to cool the equipment and evacuate the combustion gases, the air impeller remains supplied for several minutes after stopping

The duration is variable depending on the equipment and the operating phases when the cut-off occurs (максимальная скорость вращения, half speed, остановка)