Hyundai KIA Epsilon G4 petrol engine

Hyundai / KIA
epsilon
Manufacturer:	Hyundai / KIA
Production period:	1997 to today
Style:	Row end cylinder /four-cylinder
Engines:	0.8 l (798/814 cc)  1.0 l (999 cc)  1.1 l (1086 cc)
Cylinder firing order:	1-3-2 / 1-3-4-2
Successor:	Kappa

Epsilon is a series of three- and four-cylinder gasoline engines from the manufacturer Hyundai Motor Group with single overhead camshaft ( SOHC ) and three valves per cylinder. 

Engine codes: G4HA,G4HD ,G4H46,G4HE,G4HF,G4HG, G4H48

The engines are built in Ulsan ( South Korea ) andIrrungattukatoi ( India ).The engine block is made of cast iron , the cylinder head made of light metal . The smallest engine with 0.8 liter displacement is only included in the first and current series. The new edition differs significantly from its predecessor. This began the series with a bore of 63 mm and 64 mm stroke at 97.5 kg dry weight. The middle engine has 66 mm bore and 73 mm stroke. Like the largest of the series (67 mm bore and 77 mm stroke), at 83.9 kg it weighs almost two kilograms more than the successor Hyundai KIA Kappa with aluminum housing and larger displacement. Both sizes have been released in two editions. From the latter, the new three-cylinder was derived in 2011.The idling speed of the Epsilon series is 850 / min and increases with the air conditioning active to 900 revolutions per minute. The camshaft is driven by a toothed belt, the engines are not free runners . The inspection is every 60,000 km, the toothed belt exchange model-related every 80,000 - 90,000 km provided. 

With twelve valves, the Epsilon range is the only Hyundai or KIA engine line with less than four valves per cylinder in addition to the 1.5 L Alpha . Of the three valves, two were positioned on the intake side to provide a fast and even fill in the cylinder to reach. Mixture formation is achieved by multipoint injection ( MFI ) in the intake manifold. The ignition is monitored by a knock sensor that detects auto-ignition and notifies the engine control unit.  This shifts the ignition timing accordingly. Especially due to India's fluctuating fuel quality, the sensor receives a central and also engine-friendly task.

Epsilon DLI 

In 2001, the Epsilon series received a first major overhaul that concerned only the 1.0-liter engine, which was given an -E in the engine code for differentiation . The 0.8-liter engine was not further developed and ran out in the same year. The ignition distributor with mechanical ignition interrupter was exchanged for a contactless and therefore less weary ignition. Their electronic control also clarified the ignition timing and thus leads to more efficient combustion. It increased the power of the 1.0-liter engine by 3 kW and resulted in a rounder engine. 

The designation DLI was used like those of the following series only in the Indian market, is available however as only differentiation. It stands for the contactless ignition system " D istributor L ess I gnition". 

Epsilon eRLX 

In order to counteract the perceived too high consumption of the Epsilon engines compared to the Indian competition, Hyundai launched in 2002 a technical revision and a comprehensive advertising campaign for the revision called eRLX.  This was the first comprehensive use of comparative advertising made. Instead of the discontinued 0.8-liter variant, the 1.1-liter was added as another model. Friction-less piston rings and valve trains were used with the "Rotary Head Intelligent Valve Actuator" (RHiATM). However, the central component is the engine control unit supplied by Bosch .This regulates the injection quantity and ignition timing depending on the situation. Multipoint injection activates two injectors simultaneously under full load, while these are switched one after the other during partial load operation. This innovation Hyundai called "Differentially Programmed Intelligent Injection" (DPiITM). The enriched mixture is ignited by the "Real Time Intelligent Ignition" (RTiITM) adapted to the driving situation and fuel quality. Instead, the earlier engine control unit used fixed characteristics without reference to the current (fuel) situation. In addition, the engine compensates for variations in the quality of the fuel with a "fuel quality immunizer" whose function Hyundai did not carry out, but which could be composed of the ignition control and the knock sensor. 

Epsilon iRDE 

2004 started again revised penultimate Epsilon series. Their abbreviation refers to the new "intelligent Responsive Drive Engine" engine control, which takes into account the compression achieved by new pistons at 10.1. It is also the cause of the extra power achieved. Her debut was in 2004 in the KIA Picanto , followed in 2005 in the Hyundai Getz the 67 hp performing top version of the series. It was not until 2008 that the Hyundai i10 also made its marketing debut with the use of the new abbreviation - on the markets in which the previous codes were also marketed. 

Epsilon iRDE 2 

The Epsilon top version was strengthened at the end of 2010 to 69 hp and certified to Euro 5 standard. The step is astonishing in that at the same time a more modern drive appeared with the 1.0-l Kappa . In Austria, it is even offered in parallel.  The Epsilon series is thus the only one that has been certified development of existing successor to Euro-5 standard.

Changed the pistons and piston rings, which were friction reduced with a coating. In addition, the diameters of inlet and outlet valves were increased and their opening stroke increased, resulting in more air flow. This can be added more gasoline, which causes 2 HP more power. The torque remained at 99 Nm. Its performance is now similar to that of the 0.8 -l turbo engine from the first Epsilon series of 1998 .

Standard consumption fell by 0.3 to 4.7 l / 100 km. 

2011 followed for the Hyundai Eon a 0.8-liter three-cylinder. As the only Epsilon engine, it has a "Battery Management System". It reduces or increases the use of the dynamo-identical alternatorand thus the drive effort for the engine. During braking, the alternator will produce power for the battery at full load, which will be picked up again at the next acceleration, to allow the alternator to run as smoothly as possible. Thus, the propulsion remains independent of the switched-air conditioning, report car magazines. Based on the 1.1L, however, despite balancing shaft strong vibrations that reach the shift lever especially in (quiet) idle. Reason are the shift rails, in place of the remaining model range uses shift cables. A noticeable downturn until 1500 tours despite group-typical smooth-running clutch let the new development lag behind other three-cylinders of the target markets of India, Philippines, Vietnam and Chile. The standard consumption tests deviate significantly from the European ones, so that the 4.7 l / 100 km are not directly comparable. Real is 5.8 l / 100 km, half a liter below the four-cylinder and 230 kg heavier i10.

Technical Data 

Use 

Hyundai Atos

• Atos (from 2000 Atos Prime) / Santro / Amica G4HA, G4HA-TC, G4HC: 1998-2001
• Atos Prime / Santro ZipPlus / Amica / Kia Visto G4HA, G4HC-E: 2001-2003 (in Pakistan until today)
• Atos Prime / Santro Xing / Amica / Dodge Atos G4HD / G4H46 / 59 / G4H46-D4: 2003-2012 ,G4HG (63 hp): since 2005

Hyundai Eon

• Eon GB G3HA: since 2011

Hyundai Getz

• Getz TB G4H46: 2002-2005
• Getz TBi G4HG / G4H48: 2005-2009

Hyundai i10

• i10 PA G4HG / G4H48: 2008-2011 ,G4HG (69 hp): since 2011

Kia Picanto

• Picanto BA G4HE: 2004-2011,G4HF: 2004-2007,G4HF-E4: 2008-2011,G4HG (65 hp): 2004-2011
• Picanto TA G4HG (65 hp): since 2011 (Middle East)