CID - Revision history

Grrrmachine at 13:51, 6 April 2012

2012-04-06T13:51:24Z

Grrrmachine at 17:28, 10 February 2012

2012-02-10T17:28:19Z

Grrrmachine at 08:41, 27 January 2012

2012-01-27T08:41:03Z

Grrrmachine at 17:47, 14 October 2011

2011-10-14T17:47:28Z

Grrrmachine at 17:32, 14 October 2011

2011-10-14T17:32:37Z

Grrrmachine at 17:31, 14 October 2011

2011-10-14T17:31:35Z

Grrrmachine at 17:30, 14 October 2011

2011-10-14T17:30:54Z

Grrrmachine at 17:29, 14 October 2011

2011-10-14T17:29:56Z

Grrrmachine: New page: Cylinder Identification (CID) =Overview= An cylinder identification sensor is used to identify cylinder firing sequence. The sensor is connected around the HT lead of cylinder number 4 ...

2011-10-14T17:28:57Z

New page: Cylinder Identification (CID) =Overview= An cylinder identification sensor is used to identify cylinder firing sequence. The sensor is connected around the HT lead of cylinder number 4 ...

New page

Cylinder Identification (CID)

=Overview=

An cylinder identification sensor is used to identify cylinder firing sequence. The sensor is connected around the HT lead of cylinder number 4 (4 cylinder) or cylinder number 6 (6 cylinder) adjacent to the distributor. As the HT pulses travel along the HT lead, a small AC signal is induced in the sensor and returned to the ECU. The ECU utilises an ADC to transform the signal into a digital pulse.

Fuel injection

The [[Motronic]] [[ECU]] contains a fuel map with an [[Fuel#Injectors|injector]] opening time for basic conditions of speed and load. Information is then gathered from engine sensors such as the [[Intake#AFM|AFM]], CAS, CTS, and TS. As a result of this information, the ECU will look-up the correct injector pulse duration right across the engine rpm, load and temperature range.

The injectors are arranged in two banks with injectors 1 and 3 (4 cylinder) or 1, 3 and 5 (6 cylinder comprising one bank, and injectors 2 and 4 (4 cylinder) or 2, 4 and 6 (6 cylinder) making up the other bank. Each bank is connected to the ECU via an independent ECU pin.

The Motronic 1.1 & 1.3 multi-point injection system pulses the injectors semi-sequentially and once every two engine revolutions.
During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the CID sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching TDC. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.

During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the ignition timing is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurance, less overall fuel is injected to reduce the risk of fuel flooding into the engine.

@@ Line 7: / Line 7: @@
 The injectors are arranged in two banks with injectors 1 and 3 (4 cylinder) or 1, 3 and 5 (6 cylinder comprising one bank, and injectors 2 and 4 (4 cylinder) or 2, 4 and 6 (6 cylinder) making up the other bank. Each bank is connected to the ECU via an independent ECU pin.
-The Motronic 1.1 & 1.3 multi-point injection system pulses the injectors semi-sequentially and once every two engine revolutions.
+The [[Motronic_1.3|Motronic 1.1 & 1.3]] multi-point injection system pulses the injectors semi-sequentially and once every two engine revolutions.
 During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the [[CID]] sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching [[Dead_Centre#TDC|TDC]]. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.

@@ Line 8: / Line 8: @@
 The Motronic 1.1 & 1.3 multi-point injection system pulses the injectors semi-sequentially and once every two engine revolutions.
-During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the [[CID]] sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching [[TDC]]. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.
+During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the [[CID]] sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching [[Dead_Centre#TDC|TDC]]. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.
-During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the [[Ignition#Overview|ignition timing]] is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurance, less overall fuel is injected to reduce the risk of fuel flooding into the engine.
+During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the [[Ignition#Overview|ignition timing]] is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurrence, less overall fuel is injected to reduce the risk of fuel flooding into the engine.
 [[Category: Technical]]
 [[Category: Electrics]]

@@ Line 1: / Line 1: @@
 =Overview=
+[[Image:sparkplug6.jpg|right|280px]]
 A Cylinder Identification Sensor (CID) is used to identify cylinder firing sequence. The sensor is connected around the [[Ignition#HT_Leads|HT lead]] of cylinder number 4 (4 cylinder) or cylinder number 6 (6 cylinder) adjacent to the distributor. As the HT pulses travel along the HT lead, a small AC signal is induced in the sensor and returned to the [[ECU]]. The ECU utilises an ADC to transform the signal into a digital pulse.

@@ Line 3: / Line 3: @@
 A Cylinder Identification Sensor (CID) is used to identify cylinder firing sequence. The sensor is connected around the [[Ignition#HT_Leads|HT lead]] of cylinder number 4 (4 cylinder) or cylinder number 6 (6 cylinder) adjacent to the distributor. As the HT pulses travel along the HT lead, a small AC signal is induced in the sensor and returned to the [[ECU]]. The ECU utilises an ADC to transform the signal into a digital pulse.
-The [[Motronic]] ECU contains a fuel map with an [[Fuel#Injectors|injector]] opening time for basic conditions of speed and load. Information is then gathered from engine sensors such as the [[Intake#AFM|AFM]], CAS, CTS, and TS. As a result of this information, the ECU will look-up the correct injector pulse duration right across the engine rpm, load and temperature range.
+The [[Motronic]] ECU contains a fuel map with an [[Fuel#Injectors|injector]] opening time for basic conditions of speed and load. Information is then gathered from engine sensors such as the [[Intake#AFM|AFM]], [[Crank_Position_Sensor|CPS]], [[Blue_Plug|CTS]], and [[Intake#Throttle_Position_Switch|TPS]]. As a result of this information, the ECU will look-up the correct injector pulse duration right across the engine rpm, load and temperature range.
 The injectors are arranged in two banks with injectors 1 and 3 (4 cylinder) or 1, 3 and 5 (6 cylinder comprising one bank, and injectors 2 and 4 (4 cylinder) or 2, 4 and 6 (6 cylinder) making up the other bank. Each bank is connected to the ECU via an independent ECU pin.

@@ Line 1: / Line 1: @@
 =Overview=
-An cylinder identification sensor is used to identify cylinder firing sequence. The sensor is connected around the [[Ignition#HT_Leads|HT lead]] of cylinder number 4 (4 cylinder) or cylinder number 6 (6 cylinder) adjacent to the distributor. As the HT pulses travel along the HT lead, a small AC signal is induced in the sensor and returned to the [[ECU]]. The ECU utilises an ADC to transform the signal into a digital pulse.
+A Cylinder Identification Sensor (CID) is used to identify cylinder firing sequence. The sensor is connected around the [[Ignition#HT_Leads|HT lead]] of cylinder number 4 (4 cylinder) or cylinder number 6 (6 cylinder) adjacent to the distributor. As the HT pulses travel along the HT lead, a small AC signal is induced in the sensor and returned to the [[ECU]]. The ECU utilises an ADC to transform the signal into a digital pulse.
 The [[Motronic]] ECU contains a fuel map with an [[Fuel#Injectors|injector]] opening time for basic conditions of speed and load. Information is then gathered from engine sensors such as the [[Intake#AFM|AFM]], CAS, CTS, and TS. As a result of this information, the ECU will look-up the correct injector pulse duration right across the engine rpm, load and temperature range.
@@ Line 13: / Line 11: @@
 During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the [[Ignition#Overview|ignition timing]] is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurance, less overall fuel is injected to reduce the risk of fuel flooding into the engine.

←Older revision		Revision as of 17:31, 14 October 2011
Line 12:		Line 12:
	During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the [[CID]] sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching [[TDC]]. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.		During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the [[CID]] sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching [[TDC]]. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.

−	During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the ignition timing is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurance, less overall fuel is injected to reduce the risk of fuel flooding into the engine.	+	During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the [[Ignition#Overview\|ignition timing]] is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurance, less overall fuel is injected to reduce the risk of fuel flooding into the engine.

@@ Line 10: / Line 10: @@
 The Motronic 1.1 & 1.3 multi-point injection system pulses the injectors semi-sequentially and once every two engine revolutions.
-During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the CID sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching TDC. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.
+During engine start-up below 600 rpm the ECU pulses all injectors simultaneously. Once 600 rpm has been attained and if the ECU has received a signal from the [[CID]] sensor, each injector bank will be pulsed alternatively according to which pair of cylinders are approaching [[TDC]]. If a signal is not received from the CID sensor the injectors will remain on simultaneous operation. However, if the CID sensor subsequently sends a signal to the ECU after the engine has commenced running, the ECU will pulse the injectors semi-sequentially after the next deceleration phase - even if the CID sensor then ceases to send a signal.
 During start-up from cold, injector pulse duration is increased to provide a richer air/fuel mixture and pulse frequency is also increased. In addition, the ignition timing is also retarded. Injector frequency & pulse duration and degree of timing retard depend upon the engine temperature both during start-up and immediately afterwards. If the engine is restarted within one minute of the first start occurance, less overall fuel is injected to reduce the risk of fuel flooding into the engine.