Mazda Diesel engine

Mazda has a long history of building its own Diesel engines, with the exception of a few units that were built under license.

Inline-fours

Perkins

These three engines (GA/GB/GC in Perkins' internal parlance) were developed especially for Mazda and were never offered by Perkins themselves.

All of these engines have cast iron blocks and heads, two overhead valves per cylinder driven by maintenance-free timing gears, crossflow heads, are indirect injection. US-market B2200 and Ford Ranger trucks - and possibly the others as well - had rotary Bosch VE-style injection pumps, built by Diesel Kiki under license from Bosch.

RF

A diesel variation of the 1,998 cc FE engine which shares its square internal dimensions of 86 mm (3.4 in) bore and 86 mm (3.4 in) stroke - it is virtually the same block, with identical bell housing pattern and block dimensions. This could be a testament to the F-block's strength as it was over-built for naturally aspirated duty. The RF and R2 continue production to this day as the MZR-CD, with counter-rotating balance-shafts mounted between the engine block and oil pan as well as much evolved head and direct-injection technology. The RF is a SOHC, four valves-per-cylinder engine. One of Mazda's more popular diesel engines, it was also available with a pressure wave supercharger called Comprex.

Applications:

  • 61 PS (45 kW) at 4,000 rpm, 12.3 kg·m (121 N·m; 89 lb·ft) at 2,750 rpm (DIN, naturally aspirated EU version)[2]

RF 1998

Latest emission improved version used in Mazda 323 adopts a new swirl chamber with an enlarged volume, revised swirl-chamber-to-main-chamber ratio and a narrower throat area. Engine produces 52 kW (71 PS; 70 hp) at 4500 rpm on a raised 21.7:1 compression ratio, and has an exceptionally wide spread of torque throughout its range, peaking with 128 N·m (94 lb·ft) at 3000 rpm.

Further engine features:

Engines were mounted in:

RF-CX Comprex

RF-T DI 1998 (2.0 DiTD)

A direct-injection turbo version (101 bhp) with four valves per cylinder, called the DiTD was introduced in the June 1998 Mazda 626 Wagon 2.0 DiTD. Engine has SOHC valve train with rocker arms and mechanically adjusted screws (no hydraulic valve lifters), with Denso V5 rotary injection pump and Denso PCM.

There were three power versions:

Engines were mounted in:

RF 2002 (2.0 MZR-CD)

Next evolution of RF engine with common rail direct-injection was introduced in June 2002 European version Mazda 6 with output power 89 kW (121 PS; 119 hp) or 100 kW (136 PS; 134 hp) (both at 3500 rpm), depending on engine version (only difference between the two diesel drivetrains is the shape of their respective torque curves, the larger of the two engines being flatter). 2002 RF Mazda diesel engine includes new dual-mass flywheel and common rail Denso injection with max. pressure of 1800 bar, pilot and post-injection for operating smoothness and soft and acoustically unobtrusive combustion. Both versions have same compression ratio 18.3:1. Torque output (both versions have same maximum 310 N·m (230 lb·ft) at 2000 rpm), fuel efficiency and NOx emissions were improved by using:

Combined fuel economy is achieving 6.5 litres per 100 km and emission rating Euro Stage III (D4) with on a regular basis mounted catalytic converter with Lambda probe and exhaust-gas recirculation system (EGR). Engines were mounted in (in order of appearance):

RF 2005 (2.0 MZR-CD)

Production of improved, cleaner and more powerful common rail direct-injection turbocharged version of Mazda RF engine was started with July 2005 Mazda 6 facelift. This drivetrain still has most of typical features of its predecessor including belt-driven SOHC valve train with rocker arms and mechanically adjusted screws (in contrast to frequently mismatched, absolutely different Ford Duratorq ZSD or PSA DW10 engines). Mazda applied several technologies to this MZR-CD engine to achieve Euro Stage IV:

There were two power versions of this engine: Standard Power 89 kW (121 PS; 119 hp) at 3500 rpm and a maximum torque of 320 N·m (240 lb·ft) at 2000 rpm, High Power 105 kW (143 PS; 141 hp) at 3500 rpm and a maximum torque of 360 N·m (270 lb·ft) at 2000 rpm. Both versions come with a DPF system standard, which traps soot in a coated ceramic filter. As soon as the filter's storage capacity is exhausted, exhaust gas temperature is raised for a short period (using only diesel pre and post-injection techniques, not any fuel burner additive) and the particles burn off. As a result, the RF 2005 engines emit 80 percent less particulate matter than required by Euro Stage IV standards. Engines were mounted in (in order of appearance):

RF 2007 (2.0 MZR-CD)

Slightly detuned (103 kW (140 PS; 138 hp) at 3500 rpm and 330 N·m (240 lb·ft) at 2000 rpm) version of RF 2005 engine was introduced in November 2007's second generation Mazda 6. Newly calibrated powertrain control module mapping resulted in better drivability, fuel efficiency and emission performance. This engine has changed layout of the intake/exhaust, with more efficient EGR cooler, better DPF and combined fuel consumption 5.6 L/100 km (50 mpg-imp; 42 mpg-US), less than its predecessor. Engine was mounted in (in order of appearance):

R2

A diesel variation of the 2,184 cc F2 which shares its 86 mm bore and 94 mm stroke. Displacement: 2184 cm3 / 133.6 cui Power net:(Black Top) 51.5 kW / 70 PS / 69 hp (JIS net) @ 4050 Torque: 142 Nm / 105 ft-lb @ 2500 Power net:(Silver Top) 58.1 kW / 78 hp (JIS net) @ 4050 Torque: 171 Nm / 126 ft-lb @ 2500 Applications:

R2 2008 (2.2 MZR-CD)

New generation RF-based MZR-CD 2.2-litre turbo diesel engine (stroke was lengthened by 8 mm (0.3 in) in comparison to the MZR-CD 2.0 RF engine) was introduced in November 2002 and this powertrain is planned to totally replace RF 2007 and RF 2005 in the future with three (or more, see below) power versions:

2.2 MZR-CD engine features:

Engine is mounted in (in order of appearance):

Engine is planned for (in order of appearance):

Mazda 2.2 MZR-CD R2 engine has no relation to the family of belt-driven PSA DW12B twin turbo engine.

SH 2.2 SKYACTIV-D

Introduced at the 41st Tokyo Motor Show (2009)

Y4

Mazda Y4 engine (called 1.4 MZ-CD or 1.4 CiTD) is a rebadged PSA DV4 engine, produced in the PSA engine plant in Trémery or Ford's engine plant in Dagenham. These 1399 cc SOHC 8-valve turbo diesel engines with bore 73.7 mm (2.9 in), stroke 82 mm (3.2 in) and compression ratio 18.0:1 were shipped to Valencia (now in the Mazda 2 DE to Hiroshima or Hofu plants) and mounted into Mazda 2 DY and Mazda 2 DE together with a 5-speed manual transmission. The engine's maximum power is 50 kW (68 PS; 67 hp) at 4,000 rpm, maximum torque 160 N·m (120 lb·ft) Nm at 1,750 rpm.

Engine features:

Y6

Mazda Y6 engine (called 1.6 MZ-CD or 1.6 CiTD) is a rebadged PSA DV6 engine, produced in the PSA engine plant in Trémery or the Ford engine plant in Dagenham. These 1560 cc DOHC 16-valve turbo diesel engines with bore 75.0 mm (3.0 in), stroke 88.3 mm (3.5 in), and compression ratio of 18.3:1 are shipped to Hiroshima and mounted into the Mazda 3 (Axela) and Mazda 2 DE in three versions together with both 5 and 6-speed manual (Getrag-Ford developed, J65M-R) or 4-speed automatic "Activematic" transmission:

Engine features:

Inline six

See also

References

  1. ↑ Ozeki, Kazuo (2007). 日本のトラック・バス 1918~1972 [Japanese Trucks and Buses 1918-1972:] (in Japanese). Tokyo: Miki Press. p. 156. ISBN 978-4-89522-494-9.
  2. 1 2 Büschi, Hans-Ulrich, ed. (March 1991). Automobil Revue 1991 (in German and French). 86. Berne, Switzerland: Hallwag AG. p. 384. ISBN 3-444-00514-8.
  3. ↑ http://www.autokelly.sk/Catalog.aspx#PATH=3345620;8429419;8429424|CT=16|PCT=16|LNG=1
  4. ↑ http://www.autokelly.sk/Catalog.aspx#PATH=3345620;8429419;8429441|CT=16|PCT=16|LNG=1
  5. ↑ 自動車ガイドブック: Japanese motor vehicles guide book (in Japanese). Japan: Japan Automobile Manufacturers Association. 20: 251. 1973-10-30. Missing or empty |title= (help)
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