![[Datsun 1200 encyclopedia]](/wiki/upload/wiki.png)
<-- Back to EGI article
A14E and A15E used EGR and Exhaust Air Induction.
Contents |
EGR
EGR is explained in the main article: EGR
EGR on the fuel injected A-engines concerns a large area on the bottom side of the inlet runners.
EGR block-off plate fitted
| japanese
14711-H9200 PASSAGE-EGR -0709 14711-H9201 PASSAGE-EGR 7910- * 14720-H9200 GASKET-EGR PASSAGE ** 08110-61262 BOLT ** 08120-61662 BOLT ** 08915-43610 WASHER ** 08915-13610 WASHER-LOCK ** 08911-10610 NUT
| japanese
EGR VALVE 14710-M5961 VALVE ASSY-EGR CONTROL A14E -7909 14710-M7300 VALVE ASSY-EGR CONTROL A14E 7910-8010 14710-M7301 VALVE ASSY-EGR CONTROL A15E * 14719-N3301 GASKET-EGR CUT VALVE
The exhaust manifold has the EGR tube which screws to EGR Passage.
14710-H9200 TUBE ASSY-EGR A14E -7812 14710-H9201 TUBE ASSY-EGR A14E 7901- 14710-H9260 TUBE ASSY-EGR A15E 14875-M2260 CONNECTOR-VACUUM STRAIGHT [fits in EGR passage, and connect to the tube]
| japanese
EGR Switches
These switches are part of the EGR system and have no connection to the fuel injection control.
Water Temperature Switch is #A in this diagram
Thermal Vacuum Valve is #C in this diagram
- Water Temperature electrical switch
- 2-port thermal vacuum valve (TVV) closes when the engine is cold, so no vacuum can flow to the EGR valve. Result: EGR is OFF when engine is cold.
A: switch with bullet connectors * 22120-H8900 SWITCH-TEMPERATURE WATER A14E -8010 $73.67 USD * 22636-N4200 GASKET-WATER TEMPERATURE $1.07 USD
C: vacuum switch (rearward lower) * 14890-U7800 VALVE-THERMAL VACUUM A15E 8011- $22.90 USD
Red: EGR Control vacuum Pink: Fresh air Blue: supplies fresh air to VVT for Vacuum Cut Green: EGR vacuum port
VC (Vacuum-Cut) Solenoid is engaged depending on Water Temperature and Amplifier Speed Sensor
| Japanese
VVT
Venturi Vacuum Transducer (V.V.T.) modifies the EGR vacuum signal. The VVT Valve takes venturi vacuum and exhaust manifold back pressure, and outputs the EGR signal. This systems has finer control over the EGR than earlier systems. The result is better engine running and drivability.
| original
The VVT senses exhaust backpressure via the VVT Tube connected to the EGR exhaust passage
| japanese
An on/off vacuum switch has an input of intake vacuum, and activates on the high vacuum during deceleration. The output is used cut to power to the vacuum switch valve.
14775-H9201 BRACKET-VVT VALVE -7909 14775-H9202 BRACKET-VVT VALVE 7910-7911 14775-H9203 BRACKET-VVT VALVE 7912- [large bracket] 14771-H9215 VALVE ASSY-VVT * 14755-H9200 TUBE-PASSAGE TO BPT L=110 S/#B2318-N3300 [small rubber hose] BPT = Back Pressure Transducer (VVT is an advanced BPT) * 14750-H9201 TUBE ASSY-VVT CONTROL [small metal pipe] 14956-H7206 VALVE ASSY-SOLENOID EGR CUT A15E 14957-H7200 BRACKET-VACUUM SWITCH -7911 * Late engines use combined large VVT/SOLENOID bracket
VVT/BPT valve location
EAI
Exhaust Air Induction is the stainless pipe on the engine. It doesn't affect performance and is a very simple system for cleaner burning air (less pollution). It is much simpler than the Air Induction of the carbureted B310.
For explanation, see main article: Exhaust Air Induction
Stainless pipe goes from valve box on Air Cleaner
Pipe goes to the Exhaust Manifold (bolts to boss on #1 runner)
| Japanese
14821-H9200 PIPE ASSY-EAI A14E -7909 14821-H9201 PIPE ASSY-EAI A14E 7910- 14821-H9201 PIPE ASSY-EAI A15E 14861-H9200 HOSE AIR [connects to stainless pipe] * 08723-13200 CLAMP (2) 14824-H9200 BRACKET ASSY-EAI PIPE -7909 14824-H9201 BRACKET ASSY-EAI PIPE 7910- * 08360-61414 SCREW
When retrofitting into an older vehicle, simply remove the pipe and plug the openings.