Citroën – Xantia V6 Engine & Braking –

14 May 2015 | Author: | Comments Off on Citroën – Xantia V6 Engine & Braking –
Citroen Xantia

The Citroën Xantia V6:

Engine

The Citroën Xantia is now available the new Citroën 24-Valve V6 engine, offers high power, torque and low fuel consumption.

The cm³ ES9J4 V6 engine cylinders in a 60 V configuration) is one of the best on the market, offering exceptional under all driving conditions. It a maximum power of 140 kW (194 at 5,500 rpm and a maximum torque of 267 Nm at rpm. High torque is over a very wide the engine will develop 88% of torque at engine speeds as low as rpm.

The engine also a number of advanced engineering six cylinders in a 60 V configuration, 24 self-adjusting four overhead camshafts, a new Bosch MP 7.0 fuel injection and computer and an aluminum cylinder and upper crankcase assembly cast iron inserts for acoustic performance.

With new powerplant, the Xantia V6 achieves performance (230 km/h top and 1,000 m in 29.1 s), while low fuel consumption and low emission

The ES9 J4 engine that powers the V6 is a normally-aspirated 3 litre petrol with a 60· V6 configuration and valves per cylinder (24 valves in

Major design criteria the following:

Lowest possible consumption, through optimised chamber and engine control for maximum efficiency (compression 10.5/1).

Highest possible quality.

Best possible and torque performance.

The engine is a powerplant with a good, response over a wide of engine speeds. Maximum of 267 Nm appears at 4,000 rpm, but 88% of maximum value (234 Nm) is right down to 2,000

Architecture

The ES9 J4 is a normally aspirated engine with 60 V6 configuration and valves per cylinder. It is fitted in the Xantia engine compartment, with the gearbox mounted at the

From bottom to top, the consists of a sheet steel oil topped by a light alloy with a light alloy block. Viewed as a cross-section, of the branches of the Y-section block is by an aluminum alloy cylinder each of which holds two making four camshafts in Each of the two cylinder heads two aluminum alloy camshaft and each of these is capped by an alloy cover.

Cylinder Heads

The V configuration has two aluminum alloy cylinder each of which is made up of parts. The cylinder head which fit on the cylinder block, the combustion chambers, the valve the inlet piping, the water galleries, and the lower half-bearings for the

The camshafts are fitted onto the heads and held in place by the half bearings located in the camshaft casings.

Each of the two heads holds two opposing one operating the inlet valves and the the exhaust vales. The frontmost camshaft casing holds the oil-fill orifice.

The spark protrude through the combustion roofs in the cylinder head, 3 mm off-centre toward the exhaust side. The cylinder head / block assembly are specially to ensure efficient fuel-air mix for combustion.

Cylinder Block

The block is of a new design. Made of alloy with cast-iron it has an individual bore for each

Note: This new type of block has no lengthwise opening for the sleeves, when seen above. Instead, the cylinder are fitted in special bores to a stiffer assembly.

Rotating Assembly

The steel with six offset crankpins, is on four bearings and balanced by of five counterweights. It is meshed for stiffness and strength, while the of the pivots and crankpins have a imprint. At one end, it carries a pulley with torsion damper for driving the accessories and a pinion for driving the camshaft and pump.

The crankshaft is held in on the cylinder block by means of an alloy crankcase. This is using a special technology in to integrate cast iron which greatly reduce and thus improve vehicle

The crankshaft bearings are in aluminum-tin

The conrods, in shot-blasted forged have bored head channels, from which oil is projected onto the piston at a precise moment for lubrication The conrod bearings are in copper-lead

The aluminum alloy pistons a low-inertia short-skirt design, flat heads featuring shallow valve clearance The advanced piston design is the of extensive development work on a supercomputer.

The very high compression of 10.5/1 ensures excellent efficiency.

Distribution

Distribution is by four overhead camshafts, two per head. One camshaft on each head operates the inlet and the other exhaust valves. The are driven by a 32 mm wide belts also drives the water Three rollers ensure operation, while a dynamic keeps the belt optimally

Belt replacement is only after 160,000 km.

Distribution always a highly complex on this type of engine, is by special pins to set the camshafts and

Citroen Xantia

The camshafts activate the valves via hydraulic tappets.

The inner of the tappets is optimised to eliminate which could otherwise noise on engine start-up.

The casing, in synthetic material, is designed to further reduce noise. It is made up of five overlapping parts, joined by foam seals.

The distribution is 1-6-3-5-2-4.

Air Fuel Intake

The air system was specially designed to an excellent response at all engine with high torque right down to 2,000

The system consists of a two-part distributor in aluminum alloy, six pipes. The two compartments are joined via two links, one long and one short. The of these links are optimised to a change in intake behaviour engine speed.

At low engine the two chambers behave as separate (V1 and V2) which are effectively to generate the torque. At high engine the two chambers behave as a single to ensure a high power

Low fuel consumption, a major criterion for this electronic engine, was sought by minimising and by optimising the fuel intake The engine is tuned to give performance with RON 98 petrol. thanks to a built-in knocking function the engine will work satisfactorily with RON 95 despite the very high ratio (10.5/1).

The engine a new-generation Bosch MP 7.0 Motronic control unit, which very high computation The engine control functions data on engine speed and air Semi-sequential injection works by of two cylinders at a time, with two and two sparks on each engine (cylinders 1 and 5, 2 and 6, 3 and 4).

A number of special controller contribute directly to improving the response:

idle speed of injections and air intake

anti-jerk based on load, engine and gear position

automatic correction with knocking to avoid knocking phenomea

speed correction, inputting from the battery and from located on the power steering and air units.

automatic management of air cut-in / cut-out

canister

Ignition

The engine uses static ignition coils by a Bosch Mp. 7.0 Motronic computer. works two cylinders at a time, two sparks per cycle (one being ineffective).

Ignition is by a Sagem BBC3.2 compact unit, which contains coils, one for each set of two spark

Citroen Xantia
Citroen Xantia
Citroen Xantia
Citroen Xantia
Citroen Xantia
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