Citroen's EGS Gearbox
The EGS Gearbox was first introduced on the C4 Hatch and Coupe in 2006 on the 1.6HDi 16v 110BHP FAP Engine.
This highly driveable engine boasts a range of advantages. Electro-hydraulic gearbox control makes for smooth, fast gear changing. At the same time, automated gear and clutch management cuts fuel consumption by between 3% and 5%, compared with a conventional manual gearbox.
This new gearbox therefore provides a real alternative to manual and automatic transmissions, not only in terms of driveability and comfort, but also in terms of fuel economy and a particularly attractive customer price.
By means of automating gear changes and clutch control, this new gearbox obtains a reduction of fuel consumption on the order of 3 to 5% in comparison to a conventional manual gearbox. Fuel savings are boosted by the presence of a 6th gear.
Due to its particularly fuel-efficient engine, the C4 HDi 110 DPFS with the six-speed electronic gearbox system thus brings fuel consumption down to 4.5 litres per 100 kilometres in a combined cycle, with CO2 emissions of 120 grams per kilometre.
The six-speed electronic gearbox system offers outstanding user comfort and responsiveness to the driver’s commands. Its electro-hydraulic control system ensures smooth and lightning-fast gear changes in a wide range of transmission ratios, which makes driving with this gearbox particularly pleasant.
The new gearbox permanently adapts to the driver’s behaviour and reinforces his driving sensations in sports mode, which makes gear changes even faster. It also offers him peace of mind and driving comfort with the hill-hold control and easy acceleration dosage when manoeuvring, particularly in reverse.
This highly driveable engine boasts a range of advantages. Electro-hydraulic gearbox control makes for smooth, fast gear changing. At the same time, automated gear and clutch management cuts fuel consumption by between 3% and 5%, compared with a conventional manual gearbox.
This new gearbox therefore provides a real alternative to manual and automatic transmissions, not only in terms of driveability and comfort, but also in terms of fuel economy and a particularly attractive customer price.
By means of automating gear changes and clutch control, this new gearbox obtains a reduction of fuel consumption on the order of 3 to 5% in comparison to a conventional manual gearbox. Fuel savings are boosted by the presence of a 6th gear.
Due to its particularly fuel-efficient engine, the C4 HDi 110 DPFS with the six-speed electronic gearbox system thus brings fuel consumption down to 4.5 litres per 100 kilometres in a combined cycle, with CO2 emissions of 120 grams per kilometre.
The six-speed electronic gearbox system offers outstanding user comfort and responsiveness to the driver’s commands. Its electro-hydraulic control system ensures smooth and lightning-fast gear changes in a wide range of transmission ratios, which makes driving with this gearbox particularly pleasant.
The new gearbox permanently adapts to the driver’s behaviour and reinforces his driving sensations in sports mode, which makes gear changes even faster. It also offers him peace of mind and driving comfort with the hill-hold control and easy acceleration dosage when manoeuvring, particularly in reverse.
The electronic gearbox system gives the driver a choice between two driving modes:
- a manual mode in which he retains full control over gear changes by using the shift paddles behind the steering wheel or the sequential shift lever.
- an automated mode in which the gear selection is managed by the gearbox control unit.
- At any time, the driver can switch from one mode to the other, depending on his preferences and his environment: main road, motorway, city, traffic jams.
Driving without constraints in manual mode
By activating manual mode, the driver decides at which moment he or she wants to change gears, while at the same time benefiting from the absence of the clutch pedal.
The driver is permanently informed about the selected gear by the information displayed on the instrument panel.
- Shift paddles behind the steering wheel
The right-hand paddle is used to change up, and the left-hand paddle to change down. These paddles give access to the six forward speeds. For maximum comfort and safety, the paddles are fixed, irrespective of the position of the steering wheel.
- The sequential lever
On the shift gate, the manual mode is indicated by the letter M, accompanied by the signs + for changing up and – for changing down.
When the car slows down and stops (for example, when approaching a stop sign or a traffic light), the gearbox changes down automatically until it reaches 1st gear.
Automatic downshifting is a function of several criteria that are managed by the control unit (insufficient engine speed, slope, sporty driving style, etc.).
The gearbox control unit also facilitates downshifting by increasing engine speed to make gear changes smoother and without jolts.
Stress-free driving in automated mode
In the automated mode, gear changes are managed electronically in order to optimise driving comfort and fuel consumption.
This mode is activated by placing the lever in position A on the shift gate. If the driver opts for this driving mode, the AUTO symbol is displayed on the instrument panel, together with the gear engaged.
The gearbox control unit then selects the gear that is best suited according to the auto-adapting shift patterns that are determined as a function of the driver’s behaviour, the road type, engine rpm, vehicle speed and grip conditions.
The system thus prevents situations in which engine speed is too high or too low and proposes an economical shift pattern aimed at lowering fuel consumption. Optimised gear change management produces fuel savings on the order of 3 to 5% in comparison to a manual gearbox, depending on driving cycles.
However, certain specific situations are immediately recognized and taken into account by the gearbox. These include holding the engaged gear in phases of sustained acceleration, downshifting when the car is re-accelerating and holding the gear or downshifting to assist the motor brake.
If the driver wants to take control of the gearbox while driving in automated mode (for instance in an emergency situation or while overtaking), he can do so immediately. He merely needs to touch one of the paddles, and his shift request is taken into account by the gearbox. If no additional manual command is issued by the driver during a short period thereafter (approx. 20 seconds), the gearbox switches back to automated mode
In the automated mode, gear changes are managed electronically in order to optimise driving comfort and fuel consumption.
This mode is activated by placing the lever in position A on the shift gate. If the driver opts for this driving mode, the AUTO symbol is displayed on the instrument panel, together with the gear engaged.
The gearbox control unit then selects the gear that is best suited according to the auto-adapting shift patterns that are determined as a function of the driver’s behaviour, the road type, engine rpm, vehicle speed and grip conditions.
The system thus prevents situations in which engine speed is too high or too low and proposes an economical shift pattern aimed at lowering fuel consumption. Optimised gear change management produces fuel savings on the order of 3 to 5% in comparison to a manual gearbox, depending on driving cycles.
However, certain specific situations are immediately recognized and taken into account by the gearbox. These include holding the engaged gear in phases of sustained acceleration, downshifting when the car is re-accelerating and holding the gear or downshifting to assist the motor brake.
If the driver wants to take control of the gearbox while driving in automated mode (for instance in an emergency situation or while overtaking), he can do so immediately. He merely needs to touch one of the paddles, and his shift request is taken into account by the gearbox. If no additional manual command is issued by the driver during a short period thereafter (approx. 20 seconds), the gearbox switches back to automated mode
A sport mode for even more responsiveness
The six-speed electronic gearbox system of the C4 also offers a sport mode. This mode, which is available with both manual and automated operation, constantly favours fast gear changes. The total time required for shifting is thus brought down to 0.4 seconds in manual mode and 0.5 seconds in automated mode.
In automated mode, the sport mode is obtained by implementing specific shift pattern: upshifts and downshifts are triggered at higher engine speeds than in normal operation.
The sport mode is activated by the S button on the shift gate. Once selected, an S is displayed on the instrument panel.
The six-speed electronic gearbox system of the C4 also offers a sport mode. This mode, which is available with both manual and automated operation, constantly favours fast gear changes. The total time required for shifting is thus brought down to 0.4 seconds in manual mode and 0.5 seconds in automated mode.
In automated mode, the sport mode is obtained by implementing specific shift pattern: upshifts and downshifts are triggered at higher engine speeds than in normal operation.
The sport mode is activated by the S button on the shift gate. Once selected, an S is displayed on the instrument panel.
Citroen C4 Picasso
When The C4 Grand Picasso was Launched in Early 2007 and the C4 Picasso 5 Seat in Spring 2007, The EGS was an option on the Diesel 1.6HDi 16v 110BHP and Standard on the 2.0HDi 16v 138BHP and on the Petrol 2.0i 16v 143BHP.
The Exclusive Trim is only available with the EGS since launch.
In 2008 the 2.0i 16v 143BHP EGS was replaced with a new 1.6i 150 THP Engine which ment lower emission, better fuel economy and also the same performance.
In 2010 saw some improvements on the Picasso's engines including the EGS models.
At launch in 2007 the 1.6HDi 110BHP EGS CO2 was 150 g/km As of 2010 135 g/km
The 2.0HDi 138BHP EGS was 159 g/km As of 2010 153 g/km
The Origional 2.0i 16v 143BHP EGS was 190 g/km
The 1.6i 150THP EGS was now 173 g/km As of 2010 the engine has been updated to a 1.6i 155THP and produces 155 g/km and 159 g/km for the 7 seater.
Unlike the C4 Hatch and Coupe EGS (2006 - 2010) Models, the Picasso hasn't a Sport Mode Function
As of 2011 The C4 Picasso EGS line up is the petrol 1.6i 150 THP And The Diesel Range a 1.6HDi 110BHP, 1.6 e-HDi 110BHP and a 2.0HDi 150BHP.
The Exclusive Trim is only available with the EGS since launch.
In 2008 the 2.0i 16v 143BHP EGS was replaced with a new 1.6i 150 THP Engine which ment lower emission, better fuel economy and also the same performance.
In 2010 saw some improvements on the Picasso's engines including the EGS models.
At launch in 2007 the 1.6HDi 110BHP EGS CO2 was 150 g/km As of 2010 135 g/km
The 2.0HDi 138BHP EGS was 159 g/km As of 2010 153 g/km
The Origional 2.0i 16v 143BHP EGS was 190 g/km
The 1.6i 150THP EGS was now 173 g/km As of 2010 the engine has been updated to a 1.6i 155THP and produces 155 g/km and 159 g/km for the 7 seater.
Unlike the C4 Hatch and Coupe EGS (2006 - 2010) Models, the Picasso hasn't a Sport Mode Function
As of 2011 The C4 Picasso EGS line up is the petrol 1.6i 150 THP And The Diesel Range a 1.6HDi 110BHP, 1.6 e-HDi 110BHP and a 2.0HDi 150BHP.