JaMS-238

from Wikipedia, the free encyclopedia
Yaroslavsky Motorny Zavod
JaMS-238 installed in the lightly armored vehicle MT-LB

JaMS-238 installed in the lightly armored vehicle MT-LB
JaMS-238
Production period: since 1961
Manufacturer: Yaroslavsky Motorny Zavod
Working principle: diesel
Motor design: V8
Valve control: OHV
Displacement: 14866 cm 3
Mixture preparation: Direct injection
Engine charging: Free suction or with turbocharger
Power: 132-243 kW
Previous model: YesAS-206
Successor: JaMS-530

The JaMS-238 (Russian: ЯМЗ-238 , other transcriptions: JaMZ-238 and YaMZ-238 ) is a V8 diesel engine with direct injection from the former Soviet and now Russian manufacturer Jaroslawski Motorny Sawod (Russian: Ярославский моторный) заворный. The engine, which has been built since 1961, with both civil and military applications, was used by many vehicle manufacturers in the former Comecon area. Similar engines are the six-cylinder JaMS-236 and the twelve-cylinder JaMS-240 . The successor is the JaMS-530, but the JaMS-238 remains in production.

background

As early as the early 1950s, JaMS was working on a successor to the JaАS-206 engines, which went into series production in 1947, as these engines, which operated according to the two-stroke principle, were considered uneconomical. The JaАS-206 was installed at MAS in Minsk until 1966. The construction of the JaMS-238 is very similar to the Cummins 90 ° V8-265. In 1960 and 1961, the Soviet leadership made attempts to purchase technical equipment for building truck diesel engines for $ 40 million. The JaMS-238 was manufactured from 1961 and was used in the Kirowez K-700 tractor and its successors from 1962 . In addition to the K-700 tractor family, the JaMS-238 was used in various UralAS , KrAS and MAS trucks as well as special vehicles and stationary machines with diesel engine drives .

technology

Cylinder head of the engine from above, some rocker arms have been removed.

The JAMS 238 is an eight-cylinder four-stroke - diesel - V engine with a cylinder bank angle of 90 °. The camshaft is gear-driven, there are two hanging valves per cylinder. The bore is 130 mm, the stroke 140 mm, the total displacement is 14,866 cm 3 . The firing order is 1-5-4-2-6-3-7-8. The engine has direct injection, omega-shaped combustion bowls and a conventional in-line injection pump. Some engine models have an exhaust gas turbocharger . There is no charge air cooler. The mass of the engine is around 1200 kg without the gearbox. Originally there were two naturally aspirated models with 158 kW and 176 kW output. They differ in the construction of the intake pipe and in their torque characteristics.

The oil filter of the JaMS-238 should be changed after 120 operating hours on charged engines that are lubricated with Rotamol MD 302. In the case of naturally aspirated engines, it is recommended to change after 170 to 200 operating hours at the latest, even if the requirements for the engine oil are significantly lower in uncharged engines.

Model

There are different types of the JaMS-238 engine, which in Russian are called Модификации , in English "modifications". In the 1960s, there were initially two free-suction models, JaMS-238 (176 kW) for trucks and JaMS-238A (158 kW) for the K-700 tractor , which were supplemented over time by further, also charged models. The list below is not exhaustive.

Model Suction Nominal power / nominal speed
(kW / min −1 ) 		Max. Torque / rated speed
(Nm / min −1 ) 		Mass (kg) Minimum fuel consumption
(g / kWh)
ЯМЗ-238 Free sucking 176/2100 883/1500 1070 238
ЯМЗ-238А Free sucking 158/2100 785/1500 1070 238
ЯМЗ-238НБ With exhaust gas turbocharger 158/1700 932 / 1100-1400 1170 238
ЯМЗ-238БЕ With exhaust gas turbocharger 220/2000 1180 / 1200-1400 1180 207
ЯМЗ-238ДЕ With exhaust gas turbocharger 243/2100 1225 / 1200-1400 1180 207
ЯМЗ-238БЕ2 With exhaust gas turbocharger 220/2000 1274 / 1100-1300 1215 195
ЯМЗ-238ДЕ2 With exhaust gas turbocharger 243/2100 1274 / 1100-1300 1215 195

Web links

Commons : JaMS-238  - Collection of pictures, videos and audio files

Individual evidence

  1. ↑ a b Prof. KR Ing.Siegfried Wolf: The future of the Russian automotive industry - page 13. ( Memento from February 19, 2015 in the Internet Archive ) 13th Automobilforum Graz, October 20, 2011, accessed on February 18, 2015
  2. ↑ Armyguide: YaMZ-engines. Retrieved February 18, 2015
  3. ↑ a b ЯМЗ.РУ: история (Russian), accessed February 18, 2015
  4. ^ Anthony C. Sutton: Western Technology and Soviet Economic Development 1945 - 1965 third volume of a three volume series. Hoover Institution Press, Stanford University, Stanford, California, 1973. Retrieved February 19, 2015
  5. ↑ a b G. D. Chernyshev (ed.): ДВИГАТЕЛИ ЯМЗ-236, ЯМЗ-238 , Verlag "Maschinenbau", Moscow 1968, introduction
  6. ↑ a b M. G. Pantjuchin, LI Beswerchniy, NA Beresin, BM Yermakow, AM Sawin, Ju. S. Smirnov, VI Stazewitsch: Трактор "Кировец" К-700. , Kolos Publishing House in Leningrad, St. Petersburg, 1976, p. 12
  7. ↑ GD Tschernyshev (Ed.): ДВИГАТЕЛИ ЯМЗ-236, ЯМЗ-238 , Verlag "Maschinenbau", Moscow 1968, p. 16
  8. ↑ a b c G. D. Tschernyshev (ed.): ДВИГАТЕЛИ ЯМЗ-236, ЯМЗ-238 , Verlag "Maschinenbau", Moscow 1968, p. 9
  9. ↑ a b c G. Göhner: Oil change and filter cleaning intervals when using Rotamol MD 302 in the JaMZ 238 NB engine of the K-700 tractor. , in agrartechnik , Volume 25, Issue 9, September 1975, pp. 429-430
  10. ↑ a b G. D. Tschernyshev (ed.): ДВИГАТЕЛИ ЯМЗ-236, ЯМЗ-238 , Verlag "Maschinenbau", Moscow 1968, p. 5
  11. ↑ a b c d OAO Awtodiesel (ed.): Силовые Агрегаты ЯМЗ-238БЕ2, ЯМЗ-238БЕ, ЯМЗ-238ДЕ2, ЯМЗ-238ДЕ , Jaroslawl 2007, pp. 6 and 17