This articleneeds additional citations forverification.(April 2019) |
ThePSA XUDis adiesel enginedesigned and built byPSA-PeugeotandCitroën.It is anIndirect injection(IDI) engine, that uses a version of theRicardo Consulting EngineersRicardo Comet Vprechamber cylinder head design.[1]The engine comes in 1.8 L (1,769 cc), 1.9 L (1,905 cc), and 2.1-liter displacements. The 2.1 has 12 valves, all displacements were built either naturally aspirated orturbocharged.The XUD was the predecessor to theHDI range of engines.Early HDi Engines were a PSA design, later 16-valve engines were jointly developed with Ford.
| PSA XUD engine | |
|---|---|
 XUD9 in aCitroën BXTRD | |
| Overview | |
| Manufacturer | PSA |
| Production | 1982–2001 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 1.8 L (1,769 cc) 1.9 L (1,905 cc) 2.1 L (2,088 cc) 2.1 L (2,138 cc) |
| Cylinder bore | 80 mm (3.15 in) 83 mm (3.27 in) 85 mm (3.35 in) 86 mm (3.39 in) |
| Piston stroke | 88 mm (3.46 in) 92 mm (3.62 in) |
| Valvetrain | SOHC2 valves x cyl. or3 valves x cyl. |
| Combustion | |
| Turbocharger | Withintercooler(some versions) |
| Fuelsystem | Indirect injection |
| Management | Lucas,Bosch |
| Fuel type | Diesel |
| Cooling system | Water-cooled |
| Output | |
| Power output | 60–110 PS (44–81 kW; 59–108 hp) |
| Dimensions | |
| Dry weight | 157 kg (346 lb) |
| Emissions | |
| Emissions control systems | Catalytic converter |
Design
editThe XUD was available with eitherSOHC8-valve or12-valveheads. It was mainly applied transversally infront wheel drivevehicles, tilted by 30°. However, some applications in non-PSA vehicles had the engine installedlongitudinally,withrear-wheel drive.The XUD is built in Citroën's plant inTrémery,nearMetz.[1]
Displacement ranges between 1.8 and 2.1 L (1,769 and 2,138 cc), and all XU diesel engines have a stroke of either 88 or 92 mm (3.46 or 3.62 in). The former was shared with theXU9.Bore sizes range from 80 to 86 mm (3.15 to 3.39 in), some of which are also shared with other XU engines.
Upon its release the engine was noted as one of the bestdiesel engines(for cars and light vans) in the world with its high power output and refinement it made all other diesel engines seem agricultural.[1]It was also particularly light, with a ready-to-run XUD9 weighing 157 kg (346 lb), 15% less than a comparable diesel of the previous generation.[1]
Vegetable oil fuel
editThe engine, because it isindirect injection,with a slower combustion burn time thandirect injection,is suitable to run onSVO(purevegetable oil). A feature of the Ricardo Comet pre-chamber design is that it makes the engine tolerant of low Cetane value fuels such as SVO.[2]The viscosity of vegetable oil when cold is too great for rotaryinjection pumps,(in particular the weakerLucasCAV pump, theBoschVE fuel pump is superior), preventing it from acting as a lubricant and increasing the workload on the distributor/rotary injection pump and damaging it. The Lucas EPIC pump fitted to the 2.1 L 12 valveturbo-dieselengine after 1995 is the weakest pump of all.[3]
XUD7
editTheXUD7has a displacement of 1.8 L (1,769 cc), with a bore and a stroke of 80 mm × 88 mm (3.15 in × 3.46 in). Output is 60 PS (44 kW; 59 hp) for thenaturally aspiratedversion or 78 PS (57 kW; 77 hp) for theturbochargedmodel. Anintercooledturbocharged version was introduced later, with 90 PS (66 kW; 89 hp) on tap. All are Diesel engines.
| Model | Output | Notes | Model of car |
|---|---|---|---|
| XUD7 T/K | 78 PS (57 kW; 77 hp) | Turbo | Peugeot 205 Dturbo,[4]Peugeot 309 XRDT/GRDT/SRDTurbo/GRX DT[5] |
| XUD7 TE | 90 PS (66 kW; 89 hp) | Turbo with intercooler | Citroën BX TRD/TZD Turbo, Peugeot 405 Turbo,Honda ConcertoTD, Rover 200 MK2 TD |
| XUD7/K | 60 PS (44 kW; 59 hp) | Citroën C15D, Citroën BX RD, Peugeot 205, Citroën Xsara, Citroën Visa | |
| XUD7/Z | catalyst |
XUD9
edit
TheXUD9has a displacement of 1.9 L (1,905 cc), with a bore and a stroke of 83 mm × 88 mm (3.27 in × 3.46 in). Both turbocharged andnaturally aspiratedversions were produced. Most turbocharged versions feature an intercooler, although a limited number of installations in theCitroën Xantiafeatured a Turbocharger without intercooler. Both engines also featured either a Bosch or a Lucasmechanical fuel pumpand injectors. The engine version with the Bosch pump is known to have been run with vegetable oil. The original XUD9 engine is known as the "square port" engine, as its cylinder head has square exhaust ports. Later (and noticeably improved) XUD9A engines have oval ports.
PSA Group licensed a modified version of the naturally aspirated version of the engine with a catalytic converter designated the XUD9/Z toHyundaiwhich was rated at 50kw. It was used in the European specification of theLantra(1996–1999).
| Model | Output | Notes | Model of car |
|---|---|---|---|
| XUD9 | 65 PS (48 kW; 64 hp) | Diesel | Citroën BX,Peugeot 205(export),Peugeot 305,Peugeot 309,Talbot Horizon,Talbot 1510(Finland only) |
| XUD9 A | 71 PS (52 kW; 70 hp) | Rover 200 Citroën Berlingo FSO Polonez Citroën BX Lada Niva LDV Pilot | |
| XUD9 TE/L | 92 PS (68 kW; 91 hp) | Diesel turbo with intercooler | Citroën ZX Citroën Xsara Citroën Jumpy Peugeot 306 Peugeot 405 Peugeot Expert |
| XUD9 SD | 63 PS (46 kW; 62 hp) | Diesel turbo catalyst | Suzuki Samurai |
| XUD9 SD | 75 PS (55 kW; 74 hp) | Citroën Xantia Suzuki Baleno Lada Niva | |
| XUD9 TE/Y | 90 PS (66 kW; 89 hp) | Diesel turbo with intercooler catalyst | Peugeot 406 Citroën Xantia |
| XUD9/Z | 68 PS (50 kW; 67 hp) | Diesel catalyst | Hyundai Lantra |
XUD11
editTheXUD11was available in two displacements:
- 2.1 L (2,138 cc) —XUD11 Anaturally aspirated
- 2.1 L (2,088 cc) —XUD11 ATE/BTEturbocharged
Both were 12-valve SOHC engines with a 92 mm (3.62 in) stroke. The naturally aspiratedXUD11 Awas bored to 86 mm (3.39 in) for a total displacement of 2.1 L (2,138 cc), while the turbochargedATE/BTEversions were reduced in bore to 85 mm (3.35 in) for a total of 2.1 L (2,088 cc). The BTE engines used a Lucas EPIC (Electronically Programmed Injection Control) fuel pump, whereas the ATE engines used a Bosch injection pump with a throttle cable.[6]
| Model | Output | Notes | Model of car |
|---|---|---|---|
| XUD11 A | 83 PS (61 kW; 82 hp) | Diesel 12-valve SOHC | Citroën XM,Peugeot 605 |
| XUD11 ATE | 110 PS (81 kW; 108 hp) | Diesel 12-valve SOHC turbo | Citroën XM |
| XUD11 BTE | Diesel 12-valve SOHC turbo catalyst | Peugeot 406,Peugeot 605, Citroën Xantia |
Vehicles
editThe engine has been installed into the following vehicles:-
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References
edit- ^abcdPirotte, Marcel (1984-04-19). "Citroën BX 19 TRD".Le Moniteur de l'Automobile(in French).35(793). Brussels, Belgium: Editions Auto-Magazine: 21–23.
- ^Sauer, Nick (2013-04-16)."Diesel Cetane Ratings: Describing how diesel burns".Autospeed.Issue 645. Web Publications Pty Limited. Archived fromthe originalon 2020-10-12.
- ^"Diesel Bob (UK) Ltd - Good Diesel, Bad Diesel".
- ^Semonsut, Alexandre."205: Finition Dturbo".Peugeot (1983–1999)(in French). Archived fromthe originalon 2017-10-20.
- ^Semonsut, Alexandre."309: Finition XR / GR".Peugeot (1983–1999)(in French). Archived fromthe originalon 2023-10-01.
- ^"Pocket Mechanic Citroën XM Diesel and Turbodiesel"(PDF).
- Guide des moteurs Peugeot Citroën(in French)