Hyundai KIA Mu
| Hyundai / KIA | |
|---|---|
|
|
| Mu (L6EA) | |
| Manufacturer: | Hyundai / KIA |
| Production period: | 2005-2011 |
| Design: | 60 ° V |
| Engines: | 2.7 L (2656 cm³) |
| Cylinder firing order: | 1-2-3-4-5-6 |
| Previous model: | Hyundai KIA Delta |
| Successor: | none |
| Similar models: | Hyundai KIA Delta |
The Mu series is a six-cylinder petrol engine with a quadruple overhead camshaft ( QOHC ) and 4 valves per cylinder. The engines are built in Asan (South Korea).
Like the predecessor, the engine block and cylinder head are both made of aluminum . The stroke of 75 mm remains the same as the bore of 86.7 mm. The idle speed is 680 per minute, the dry weight 168.7 kg.
The inlet and outlet camshafts of each cylinder bank are connected by a timing chain , the power transmission from the crankshaft to the cylinder head is carried out by means of a toothed belt (left picture at the end of the introduction). For some models, no inspection is planned for this, it is then replaced every 100,000 km, for those with an inspection this is planned every 60,000 km, the exchange then every 120,000 km or 60 months. The motors are not free runners . The auxiliary units are driven by a serpentine belt. This has an automatic retensioning system, its inspection is planned every 32,000 / 48,000 km or 16/24 months, depending on the model, an exchange only if necessary
The valves are operated by mechanical bucket tappets (right picture at the end of the introduction). Compared to hydraulic bucket tappets, they reduce the resistance to the cam . Their shelf life is comparable, but they are cheaper and less dependent on good oil viscosity . Over the years, the surface of the tappet and cam is worn away, reducing the stroke of the valve into the cylinder chamber. This means that less air can flow in, whereupon the engine automatically reduces the amount of fuel and thus its performance. This is accompanied by an audible ticking noise, as the cam no longer rests constantly on the bucket tappet, but only reaches it once per revolution - the impact generates the ticking noise. This can disappear due to the expansion in the warm engine, but the valve clearance has become too large. Checking it is included in the maintenance plan every 100,000 km, but maintenance only if necessary. In this case, the material removed would be compensated for on the side of the bucket tappet. The ones used here do not have any overlying platelets (hence “ shimless mechanical bucket tappets”), so that in this case not the platelet, but the bucket tappet itself is exchanged for one of 40 precisely graduated variants. This can usually be combined with replacing the timing belt (100,000 km) or the spark plugs (150,000 km).
In addition to two timing chains (at the top half-covered on the camshafts), a timing belt (instead of the timing chain here in the foreground) drives the Mu-V6 engine.
The cam (gray) presses the valve (orange) into the cylinder and thus releases the air duct. The bucket tappet sits between the cam and valve, but is not shown here.
Mu
The Mu V6 is based on the Delta series and took over some innovations from the Lambda series, which was developed in parallel and appeared in 2004 . This includes the CVVT, the switch to mechanical bucket tappets and the almost identical cylinder head.
The range consists of an engine that is manufactured in two versions at the factory: one for petrol and one for LPG . The latter is only offered in South Korea and there also in models that debuted in 2010 and is intended as a particularly smooth-running alternative to the similarly economical diesel engine . The marketing of the protected abbreviation “LPI” indicates that the system including the control unit is supplied by the manufacturer Vialle.
Compared to the predecessor Delta, the compression has been increased slightly, which leads to a three percent fuel saving ( see ). In addition, the cylinder head was changed to add a CVVT named camshaft adjustment for the intake side. This only affects the overlap of the valve opening on the inlet and outlet side (the opening time on the inlet side can be varied), but not on the valve lift and thus the opening duration . It is therefore comparable to the BMW single VANOS technology . In addition to better torque in the lower speed range, it primarily reduces nitrogen oxide levels by using the exhaust gas recirculating effect of a large overlap - exhaust gas that has already been emitted is sucked back into the combustion chamber. In 2008, the CVVT control of the intake camshaft was expanded to include one for the output side and is thus similar to the BMW double vanos technology . The system now called D (ual) -CVVT increased the output by five hp to 193. The CVVT is not always listed due to its serial nature. For the Kia Cadenza , the engine was increased to 200 hp, the changes made were not published.
The variable intake system of its predecessor has been expanded by one level to three. It thus takes better account of the pulsation of the air in the intake manifold, which occurs when the valves are opened and closed. If these negative and positive pressure impulses find their way into the engine compartment that is adapted to their rhythm, a slight resonance charging effect occurs, similar to a turbocharger . In order to achieve this, suitably long airways are distributed across the speed range, which results in a consistently high torque.
Hyundai's first V6 series ends with the Mu series . It will be replaced by the four-cylinder Theta series .
Data
| series | Engine code | Displacement (cm³) | Stroke × bore (mm) | Power at (1 / min) | Torque at (1 / min) | cylinder | compression | Charging | injection |
|---|---|---|---|---|---|---|---|---|---|
| Mu | G6EA (G) 1 | 2656 | 75.0 x 86.7 | 188/194/200 2 at 6000 | 249-250 at 4000 | 6th | 10.4 |
VIS (3 way) |
MFI |
| Mu | L6EA 3 | 2656 | 75.0 x 86.7 | 161/165 at 5400 | 245 at 4000 | 6th | 10.0 |
VIS (3 way) |
MFI |
commitment
Listed are the Mu engines installed worldwide for each model; the engine was not offered in every country.
Hyundai Grandeur
- Grandeur TG
- G6EA (188 hp): 2005-2009 (South Korea)
- G6EA (194 hp): 2009-2010 (South Korea)
Hyundai Santa Fe
- Santa Fe SM
- G6BA (189 hp): 2005.
- Santa Fe CM
- G6BA (189 hp): 2006-2010
KIA Cadenza
- Cadenza VG
- G6EA (200 hp): 2010.
- L6EA (165 hp): 2010.
KIA Carens
- Carens UN
- G6EA (188 hp): 2006-2008
- G6EA (193 hp): 2008-present
KIA Carnival
- Carnival VQ
- G6EA (188 hp): 2006-2010
- L6EA (161 hp): 2007-2011
KIA Magentis
- Magentis MG
- G6EA (188 PS): 2001-2008
- G6EA (194 hp): 2008-2010
KIA Opirus
- Opirus GH
- G6EA (188 hp): 2006-2009
- G6EA (194 hp): 2009-2011
KIA Sorento
- Sorento XM
- L6EA (161 hp): 2009-2010
Individual evidence
- ↑ Production in Asan ( Memento of the original from December 27, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 145 kB)
- ↑ Mu idle speed ( Memento of the original from June 29, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ engine catalog (PDF; 7.9 MB)
- ↑ Instruction manual KIA Magentis - change interval of the toothed belt p.273 ( Memento of the original from April 1, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 6.8 MB)
- ↑ Hyundai Santa Fe manual, Chapter 5, p. 5 Change interval of the toothed belt 120,000 km
- ↑ Timing chains and toothed belts in the Mu engine ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Serpentine belt in the Mu V6
- ↑ Instruction manual KIA Magentis - inspection interval of the serpentine belt p.273 ( Memento of the original from April 1, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 6.8 MB)
- ↑ Hyundai Santa Fe Manual, Chapter 5, p. 5 Serpentine belt inspection interval 24 months
- ↑ Type of valve actuation
- ↑ Manufacturer of the bucket tappet (PDF; 10.1 MB)
- ↑ Ticking or clicking noise due to loose valve adjustment plate: Sporadic clicking of an XM TCT. In: YouTube . March 12, 2010, accessed April 30, 2019 .
- ↑ Sound of a worn bucket tappet
- ↑ Operating Instructions Hyundai Sonata p. 209 Inspection interval of the valve clearance
- ↑ Similarities between the Mu and Lambda series
- ↑ Kia Sorento with Mu LPI
- ↑ Explanation of the Hyundai CVVT technology including images
- ↑ Mu Dual-CVVT ( Memento of the original from August 5, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Mu V6 with 200 HP ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Gas exchange # four-stroke reciprocating engine
