Design features. Nissan Almera (from 1995 to 1999 of release)
Nissan Almera service from 1995 to 2000 in N15 body
1. General information
2. The general requirements to car repairs
3. Operation and car maintenance
4. Petrol engines
5. Diesel engines
5.1. General information
5.2. Block of cylinders and krivoshipnoshatunny mechanism
5.3. Gazoraspredeleniye mechanism
5.4. Cooling system
5.5. Greasing system
5.6. Power supply system
5.7. Control system of the CD20 engine
5.8. Control system of the CD20E engine
5.8.1. Design features
5.8.2. Check of a control system by the engine
5.9. System of production of the fulfilled gases
6. Transmission
7. Running gear
8. Steering
9. Brake system
10. Electric equipment
11. Body
12. Appendices
13. Electric equipment schemes
 









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5-8-1-konstruktivnye-osobennosti.html

5.8.1. Design features

The electric circuit of a control system (COURT) is presented by the engine at the end of the book.
The system includes EBU, the key which information parameters are the temperature of cooling liquid, fuel temperature, frequency of rotation of a cranked shaft of the engine, VMT and the provision of a drive of supply of fuel.

Fig. 3.47. Numbering of conclusions of a block of wires of the EBU socket of the CD20E engine (rear view)


Fig. 3.48. Placement of a block of the socket of diagnostics


EBU represents the microprocessor with digital programming. The EBU plug socket on 88 conclusions has numbering with 1 on 70 and with 101 on 118 (fig. 3.47). Purpose of conclusions of the plug socket is specified in tab. 3.18. EBU is located in car salon under the central part of the dashboard. It operates prestarting and poststarting heating, a corner of an advancing of injection of fuel, an aktyuator of supply of fuel and an idling mode. The block, besides, provides protection against overloads and prevents останов the engine at decrease in frequency of rotation of a cranked shaft to 1000 mines — 1. At installation of the lever of gear shifting in the EBU neutral situation limits the maximum frequency of rotation to 4000 mines — 1. If on the car the conditioner is established, EBU operates turning on of the compressor for the prevention of failure of power setting. If on the car the immobilizer is besides established, the signal after key installation in the lock of the switch of devices and a starter is compared to the signal which has been written down in memory of an immobilizer. The signal of comparison moves on EBU which gives out or does not give out permission to food giving to a control system of the engine. In case of failure of any driving mechanism or the EBU sensor can support depending on malfunction operation of the engine in emergency operation. In EBU there is a program of tracking operation of sensors and other devices and record in memory of possible failures in their work. Information reading from memory possibly only by means of special diagnostic equipment which is connected to a block of the socket of diagnostics located under the block of safety locks in salon of the car (fig. 3.48).

Table 3.18  EBU plug socket Conclusions
Conclusion number
Appointment
1
Management of the electromagnetic valve of provision of an air zaslonka
4
Management of the relay of a food of system
5
Signal on a tachometer
10
Signal from the sensor of temperature of fuel
14
Signal of management of the relay of the electrofan of system of cooling on 1 - й speeds
15
Signal from the sensor of pressure of a coolant of the conditioner
16
Inclusion of a control lamp before - and poststarting heating
18
Inclusion of a control lamp of malfunction of a control system by the engine
19
Signal from the sensor of temperature of cooling liquid
20
«+ " starter
21
Signal about turning on / switching off of the conditioner
22
Signal from the sensor of position of the lever of gear shifting
23
Signal from the sensor of provision of a pedal of management of supply of fuel
26
Signal from the sensor of speed of movement of the car
28
"Mass" of the sensor of provision of a shaft of a drive of TNVD
29
Signal from the switch of a pedal of management of supply of fuel
31
Signal from the idling switch
32
Signal from the switch «full loading»
33
"Mass" of the sensor of provision of a shaft of a drive of TNVD
34
Signal from the sensor of lifting of a needle of a nozzle 1 - го the cylinder
38
«+ " after key installation in the lock of the switch of devices and a starter in the situation "ON"
39
"Weight"
40
Signal from the sensor of frequency of rotation and the provision of a cranked shaft
41
Signal from the sensor of provision of a shaft of a drive of TNVD
42
Signal on a block of the socket of diagnostics
43
"Weight"
44
Signal from the sensor of frequency of rotation and the provision of a cranked shaft
45
Signal from the sensor of provision of a shaft of a drive of TNVD
46
Signal from the calibration resistor
47
"Mass" of the sensor of frequency of rotation and provision of a cranked shaft
48
Food of the sensor of provision of a pedal of management by supply of fuel
50
"Mass" of the sensor of temperature of cooling liquid, the verifying resistor, the sensor of temperature of fuel
51
"Mass" of the sensor of provision of a pedal of management of supply of fuel
52
"Mass" of the sensor of frequency of rotation and provision of a cranked shaft
53
Food of the sensor of provision of an adjusting zolotnik
56
«+ " after key installation in the lock of the switch of devices and a starter in the situation "ON"
57
Food of the sensor of provision of an adjusting zolotnik
61
«+ " after key installation in the lock of the switch of devices and a starter in the situation "ON"
62
"Mass" of the sensor of provision of an adjusting zolotnik
63
Signal from the sensor of provision of an adjusting zolotnik
64
Signal on a block of the socket of diagnostics
65
Signal on a block of the socket of diagnostics
66
"Mass" of the sensor of provision of an adjusting zolotnik
70
«+ " from the storage battery
101
Management of an aktyuator of supply of fuel
102
"Mass" of an aktyuator of supply of fuel
103
Management of the electromagnetic valve No. 1 of HORN system
104
Management of the electromagnetic valve of regulation of a corner of an advancing of injection of fuel
106
"Weight"
107
Management of an aktyuator of supply of fuel
109
Management of the electromagnetic valve No. 2 of HORN system
110
Management of the electromagnetic valve of regulation of a corner of an advancing of injection of fuel
111
Relay management before - and poststarting heating
112
"Weight"
113
Management of the electromagnetic valve останова diesel engine
115
Management of the electromagnetic valve останова diesel engine
116
«+ " after key installation in the lock of the switch of devices and a starter in the situation "ON"
117
«+ " after key installation in the lock of the switch of devices and a starter in the situation "ON"
118
"Weight"



Fig. 3.49. Constructive scheme of a control system of the CD20E engine: 1 — the storage battery; 2 — the switch of devices and a starter; 3 — a control lamp of malfunction of a control system of the engine; 4 — a control lamp of inclusion of prestarting heating of the engine; 5 — the sensor of availability of water in a settler of the fuel filter; 6 — EBU; 7 — from the conditioner switch; 8 — the sensor of provision of a pedal of management of supply of fuel; 9 — the switch «idling — full loading»; 10 — the switch of a pedal of management of supply of fuel; 11 — the sensor of position of the lever of gear shifting; 12 — the sensor of speed of movement of the car; 13 — electrofans of system of cooling of the engine; 14 — TNVD; 15 — the calibration resistor; 16 — an aktyuator of supply of fuel; 17 — the sensor of temperature of fuel; 18 — the sensor of provision of an adjusting zolotnik; 19 — the electromagnetic valve останова a diesel engine; 20 — the electromagnetic valve of regulation of a corner of an advancing of injection of fuel; 21 — the sensor of provision of a shaft of a drive of TNVD; 22 — the sensor of frequency of rotation and the provision of a cranked shaft; 23 — the sensor of temperature of cooling liquid; 24 — the sensor of lifting of a needle of a nozzle; 25 — a glow plug; 26 — the inclusion relay before - and poststarting heating; 27 — the electromagnetic valve the HORN No. 1; 28 — the electromagnetic valve the HORN No. 2; 29 — the electromagnetic valve of an air zaslonka; 30 — to the vacuum pump; 31 — the valve of an air zaslonka; 32 — the valve of a retsirkulyatsiya of the fulfilled gases; 33 — the air filter


Fig. 3.50. Placement of units of a control system by the CD20E engine in car salon: 1 — the switch of a pedal of management of supply of fuel; 2 — the switch «idling — full loading»; 3 — a block of the sensor of provision of a pedal of management of supply of fuel; 4 — the electronic control unit; 5 — the relay of a food of system


Fig. 3.51. Placement of units of a control system by the CD20E engine in a motor compartment: 1 — the sensor of temperature of cooling liquid;
2 — the calibration resistor; 3 — the sensor of provision of a shaft of a drive of TNVD; 4 — the electromagnetic valve of regulation of a corner of an advancing of injection of fuel;
5 — the electromagnetic valve останова a diesel engine; 6 — the sensor of temperature of fuel, the sensor of provision of an adjusting zolotnik and a drive of an aktyuator of supply of fuel; 7 — the sensor of position of the lever of gear shifting; 8 — the sensor of speed of movement of the car; 9 — the valve of an air zaslonka; 10 — the inclusion relay before - and poststarting heating; 11 — the relay of pressure of a coolant; 12 — the electromagnetic valve of an air zaslonka; 13 — the HORN system valve;
14 — the electromagnetic valve of system the HORN No. 2; 15 — the electromagnetic valve of system the HORN No. 1; 16 — the sensor of frequency of rotation and the provision of a cranked shaft; 17 — the relay of turning on of electrofans of system of cooling of the engine on the 2nd speed; 18 — the relay of turning on of electrofans of system of cooling of the engine on the 1st speed; 19 — the relay of turning on of the conditioner; 20 — the sensor of lifting of a needle of a nozzle


The constructive scheme of system is represented on fig. 3.49, the electric circuit is given in an insert at the end of the book. Placement of units of system in salon of the car is represented нарис. 3.50, and in a motor compartment on fig. 3.51. The control lamp of malfunction COURT of orange color (EBU joins) is located in a combination of devices. Continuous burning of this control lamp indicates emergence of serious malfunction in a control system of the engine. At turning on of the switch of devices and a starter the control lamp of malfunction lights up and dies away through 3 with the ambassador of start-up of the engine. If on the car
the immobilizer is established, the blinking of a control lamp of malfunction at turning on of the switch of devices and a starter specifies that the immobilizer does not give permission to engine start-up. Connection of vacuum pipelines on the engine is given on fig. 3.52.

Fig. 3.52. Connection of vacuum pipelines on the CD20E engine: 1 — the vacuum pump; 2 — the electromagnetic valve of an air zaslonka; 3 — the valve of an air zaslonka; 4 — the HORN system valve; 5 — the electromagnetic valve the HORN No. 2; 6 — the electromagnetic valve the HORN No. 1



The relay of a food of system is under the central part of the dashboard near EBU of a control system of the engine in car salon. Turning on of this relay is carried out by EBU through a conclusion «4». The power chain of the relay submits a food on EBU through conclusions «56», «61», «116» and «117», then on the sensor of provision of a pedal of management supply of fuel. Supply voltage of 12 Century.
The relay of turning on of the conditioner is in the block of the relay established on an arch of the right wheel in a motor compartment. EBU through a conclusion «5» turns on the compressor by means of the relay of turning on of the conditioner and the pressure relay in system of circulation of a coolant. Using the signals arriving from various sensors, EBU supervises, that turning on of the compressor of the conditioner did not cause failures in operation of the engine. In the opposite
case of EBU does not allow turning on of the compressor of the conditioner, especially if the sensor of provision of a pedal of management of supply of fuel gives out a signal about pedal pressing against the stop, and also at an engine overheat. Supply voltage of 12 Century.
The sensor of position of the roller of a drive of TNVD of inductive type is established sideways TNVD. The sensor sends on EBU the alternating voltage modulated on frequency so that four impulses, arriving from a label, corresponded to two turns of the roller. Information also arrives on a tachometer. The resistance measured on conclusions of "2" and «3» blocks of the TNVD 38-shtyrkovy socket of gray color at temperature 25 ° With, makes 1,6 kiloohms.
The sensor of temperature of cooling liquid is established on a target branch pipe of a head of the block of cylinders, on the back party on the right. Internal resistance of the sensor decreases in proportion to temperature increase of cooling liquid. Color of marking the gray. Supply voltage of 5 Century.
The sensor of provision of an adjusting zolotnik of inductive type is established under a cover on TNVD. The sensor gives a signal on EBU about the provision of an adjusting zolotnik of an aktyuator of supply of fuel. It consists of two coils and the metal ring connected with an axis of an aktyuator of supply of fuel. Moving in front of coils, the ring changes their inductance.
The calibration resistor is established sideways TNVD. The resistor allows EBU to receive exact information on adjustments and constructive characteristics of the fuel pump. Supply voltage of 5 Century.
Aktyuator supply of fuel carries out function of a mechanical regulator of supply of fuel to TNVD. It copes the electronic block COURT. Aktyuator consists of the rotary magnet executed for a single whole with an adjusting zolotnik, and a motionless electromagnet on which power supply by means of EBU moves. If a food does not move, returnable springs move an adjusting zolotnik to non-working situation and interrupt supply of fuel.
The electromagnetic valve of regulation of a corner of an advancing of injection of fuel is located under TNVD. At receipt of power supply from EBU electromagnetic and the valve changes the angular provision of a plunzher of TNVD in relation to an axis of the driving roller.
The sensor of provision of a pedal of management of supply of fuel of potentsiometrichesky type is established on a pedal of management by supply of fuel in car salon. By pressing a pedal the driver the sensor gives a signal on EBU which defines amount of injected fuel. The sensor is connected by a cable to a pedal of management of supply of fuel. Supply voltage of 5 Century.
The switch is built in the sensor «idling — full loading». Contacts of the switch are opened, when the pedal is completely released, and are closed, when the pedal is pressed against the stop. The switch gives a signal on conclusions «31» and «32» EBU sockets.
Supply voltage of 12 Century.
The switch of a pedal of management of supply of fuel is established on a pedal of management by supply of fuel, built in the sensor of provision of a pedal in car salon. Contacts of the switch are opened in situation «a pedal is completely released» and are closed in situation «a pedal is pressed against the stop». At short circuit the switch connects on "weight" a conclusion «29» EBU sockets. Supply voltage of 12 Century.
The sensor of lifting of a needle of piezoelectric type is established in a nozzle of the 1st cylinder. The sensor sends EBU a signal about needle lifting. This signal allows the electronic control unit to define the beginning of injection of fuel and to regulate a corner of an advancing of injection of fuel. The sensor consists of the core connected with a needle of a nozzle which moves concerning a winding of the coil and causes change of a magnetic field.
The sensor of temperature of fuel represents the resistor with negative temperature factor. It is established under TNVD cover. The sensor hands over EBU information on fuel temperature for correction of supply of fuel depending on its viscosity. Supply voltage of 5 Century.
The sensor of frequency of rotation and the provision of a cranked shaft of inductive type is established on the block of cylinders opposite to a disk having two cuts which form an impulse corresponding to a corner of the provision of a cranked shaft of 70 ° to VMT in a sensor winding. The control lamp of inclusion of prestarting heating of orange color is located in a combination of devices. The lamp lights up when giving tension through a conclusion «16» EBU sockets.
The inclusion relay before - and poststarting heating fastens on the panel of the left forward wing in a motor compartment behind the storage battery. Connection on "mass" of a conclusion of a chain of management of the relay is carried out through a conclusion «11» EBU sockets. Tension on glow plugs moves on a power chain of the relay. At inclusion of a key of the switch of devices and a starter in the provision "ON" of a glow plug receive tension during 20 with while the temperature of cooling liquid remains below 75 ° to S.Rezhim of poststarting heating begins right after engine start-up. Glow plugs запитываются from 20 with to
5 mines while the temperature of cooling liquid will not exceed 60 ° Page.
Glow plugs fast-heating up, finger-type type. Resistance of a candle at temperature 25 ° With makes 0,5 Ohm.
The sensor of speed of movement of the car of inductive type consists of the generator of the impulses which has been built in a drive of a speedometer. The generator develops a rectangular impulse amplitude 5 In, modulated on frequency depending on speed of movement of the car. The signal is transferred through a speedometer in combinations of devices on a conclusion «26» EBU sockets.
The sensor of position of the lever of gear shifting is located on a coupling case. It sends information of EBU on position of the lever of gear shifting. The sensor is in the closed condition at installation of the lever of gear shifting in neutral situation. Contacts of the sensor are disconnected at inclusion of any transfer. Thus conclusion «22» EBU sockets
it is connected to "weight". EBU prevents emergence of overloads idling and interruptions at the moment of gear shifting. Supply voltage of 12 Century.
The sensor of pressure of a coolant of climatic installation is located on a dehumidifier placed ahead, on the left side of a motor compartment. It transmits EBU a signal about pressure in system of circulation of a coolant through a conclusion «15». Supply voltage of 12 Century.
Two electromagnetic valves of system of a retsirkulyatsiya of the fulfilled gases are established on the inlet pipeline and EBU of a control system of the engine through conclusions «103» and «109» cope. EBU gives out permission to a retsirkulyatsiya of the fulfilled gases depending on power setting, the provision of a pedal of management by supply of fuel and temperature of cooling liquid. The amount of the fulfilled gases which is selected for a retsirkulyatsiya, changes depending on the depression brought to the HORN valve which copes two electromagnetic valves. Retsirkulyatsiya of the fulfilled gases depends, besides, from amount of arriving air and is carried out only in that case when the temperature of cooling liquid exceeds 70 ° S.Dlya of definition of position of electromagnetic valves see tab. 3.19. Electromagnetic valves work in a mode of on-off regulation. Supply voltage of 12 Century.

Table 3.19  Position of valves of HORN system depending on engine loading
Load of the engine
Electromagnetic valve No. 1
Electromagnetic valve No. 2
HORN valve
Electromagnetic valve of provision of an air zaslonka
Valve of provision of an air zaslonka
Amount of the fulfilled gases in retsirkulyatsiya system
The small
It is open
It is open
It is completely open
It is open
It is closed
The maximum
1/2 loadings
It is open
It is open
It is completely open
It is closed
It is open
Average
The normal
It is open
It is closed
It is half-open
It is closed
It is open
The small
The full
It is closed
It is closed
It is closed
It is closed
It is open
No

The HORN pneumovalve of diafragmenny type is established on the inlet pipeline. It serves for providing a retsirkulyatsiya of a part of the fulfilled gases with a way of their direction in the inlet pipeline. The HORN valve incorporates to a final collector by means of the metal pipeline. It copes two electromagnetic valves at depression from the engine. Moving of the membrane connected with the valve, stops access of the fulfilled gases to the inlet pipeline.
Retsirkulyatsiya of the fulfilled gases and mixture of the fulfilled gases with air arriving in the engine causes fall of the content of oxygen in soaked-up air and, as a result, fall of temperature of burning of a mix that, in turn, reduces quantity of oxides of nitrogen (NOH) which are the main pollutants of environment and have especially harmful effects on a human body.
The electromagnetic valve of an air zaslonka of on-off regulation is located on the case of the air filter, about the air valve, and EBU through a conclusion «1» copes. EBU supervises amount of the air arriving in the engine, depending on an operating mode, temperature of cooling liquid and the provision of a pedal of management by supply of fuel. Control of amount of arriving air is connected with a mode of a retsirkulyatsiya of the fulfilled gases. While the temperature of cooling liquid is lower 70 ° With, the air zaslonka remains open. Supply voltage of 12 Century.
The pneumovalve of an air zaslonka fastens to the case of the air filter and operates an air zaslonka on an exit of the air filter. In turn, the valve copes the depression created by the engine, via the electromagnetic valve of an air zaslonka. Moving of a membrane of the valve connected with an axis of an air zaslonka of management of supply of air, opens or closes an air zaslonka.

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5.8.2. Check of a control system by the engine