MAN TGM – a reliable basis for many tasks
MAN TGM – a reliable basis for many tasks
The TGM series starts at 12 tonnes gross vehicle weight. As a two-axle vehicle it goes up to 18 tonnes and with three axles, up to 26 tonnes. The all-wheel drive version provides local authorities with a practical vehicle for deployment all year round. The entry-level engine for the TGM series produces 184 kW (250 hp). 213 kW (290 hp) and 250 kW (340 hp) complete the list of available engines. These modern six-cylinder engines with common-rail injection also comply with the Euro 4 and Euro 5 exhaust emission standards as well as the stricter EEV standard, without the need for exhaust-cleaning additives. There are cabs in four sizes - C, L, LX and the four-door crew cab - all of which have their users enthusing over their ease of entry, spatial economy and operation. The electronic stability program ESP and MAN TipMatic® automatic transmission are also available for MAN's medium range.
A speciality in the all-wheel drive range is the TGM with gross vehicle weights of 13 to 15 tonnes: MAN is the only manufacturer offering an air-sprung rear axle as standard equipment in this weight class. This provides maximum protection against vibration for the load that the vehicle is carrying. Electronic control ensures that the driving level always remains constant. This improves driving stability and safety. Rolling movements of the body are more sensitively and quickly compensated for. When it comes to winter services, there is an additional argument: regardless of the load condition of the mounted spreader, the loading platform and spreading plate always remain at the same height. Once the spreading pattern has been set, it doesn't have to be re-adjusted during the round. In year-round operation, the attachments on the loading platform can be changed as required at the municipal building yard. Thanks to air suspension this is quick and easy to do. The vehicle can be lowered nine centimetres at the press of a button by bleeding the air from the bellows on the rear, or raised by 13 centimetres.
Its wheelbase of 3,050 millimetres makes the all-wheel drive version extremely compact. The driver faces a number of challenges, not least of which is clearing snow from narrow streets which are also often full of parked cars. Manoeuvrable vehicles that are straightforward in operation are needed here. The driver has all the controls for the hydraulics that run the winter service equipment at his fingertips on the dashboard next to the steering wheel.
A clean sweep with the MAN TGM
Road sweepers are a particularly demanding type of vehicle. On the one hand they require typical truck speeds on the routes between their place of service. On the other hand sweeper units move at a very low working speed of < 2 km/h. At the same time users increasingly want hydraulic systems powered by the vehicle's engine to drive the sweeping and extraction unit. This means that they won't have to install a separate drive engine on the body, which would produce noise and exhaust gas and reduce payload. From a technical point of view, the body manufacturers solve this by using the power take-off installed on the engine side or by installing an hydraulic pump in the power train.
The chassis of all the MAN ranges can be used to realise road sweepers of various sizes. For the biggest market segment, the two-axle sweeper with a six cubic metre container for the sweepings, MAN offers the TGM with C cab and 15.5-tonne gross vehicle weight. Air suspension on the rear axle is advisable for this task: it retains the same driving level in every laden condition and thus reduces the wear on the sweeper brushes. The right-hand drive version is mainly preferred in right-hand traffic to ensure that the driver has the best view of the edge of the road. The side window, which extends far down into the door, and the large mirror help him in his work.
Since sweeper units need a lot of space between the axles and on the frame for sweeper rollers, circular brushes and extraction units, this version of the MAN TGM has the larger 22.5 inch tyres. The MAN Modification Competence Center coordinates the changes to the chassis when it is prepared for the sweeper body. As a rule, these involve the routing of the air intake, the battery box and the exhaust-gas system in a unit carrier right behind the cab. On demand, the diesel tank made of aluminium with a capacity of 200 litres is located at the rear of the vehicle between the frame longitudinal members. Air deflectors underneath radiator and engine prevent dust being whirled about when the cooling fan is on.
Collecting waste with a three-axle MAN TGM
At the IFAT ENTSORGA 2010 MAN Nutzfahrzeuge is for the first time presenting the TGM in a three-axle version as the basis for a waste-collection vehicle. Exhibited at the MAN stand is a TGM 26.290 6x2-4 BL. A three-man crew has ample space in its L cab with its middle seat optimised for comfort and stowage space for the crew's personal protective equipment. The 26-tonner's steered trailing axle makes it manoeuvrable in narrow streets. while the automated MAN TipMatic® transmission relieves the driver of the frequent gear-changing between loading points. Representative of how MAN vehicles are equipped in keeping with the requirements of a sector is the control element mounted on the armrest of the driver's seat. The driver uses it to switch between the transmission's Drive and Neutral settings and to switch on the PTO for the body's hydraulic system. Thanks to the three seats in the C cab, two co-workers can also be driven to the collection area to pick up the refuse containers.
MAN Nutzfahrzeuge is exhibiting a three-axle TGM 26.290 6x2-4 B-L as a prototype at the IFAT ENTSORGA 2010. This vehicle is equipped with a hydrostatic regenerative braking system from Bosch Rexroth to recuperate braking energy. Waste-collection vehicles are ideally suited for the installation of this system because collecting waste involves frequent braking and subsequent acceleration over short distances. The recuperation of braking energy by the HRB system is expected to improve the efficiency of waste-collection vehicles by about 25 percent. Positive effects are savings in fuel consumption and reductions in CO2 and exhaust-gas emissions, wear debris from the brakes and fine particulate pollution in residential areas.
The kinetic energy that would normally be lost during braking as heat is transformed into hydraulic energy and stored. This stored energy is used to drive the vehicle when it subsequently accelerates again. The central element of the system is an hydraulic axial piston unit integrated into the driveline of the MAN vehicle. Whenever the vehicle brakes, the unit functions as a pump, filling an hydraulic bladder accumulator with hydraulic fluid. This accumulator is located between the cab and the body. When the vehicle pulls away, the oil, which is under pressure, flows back from the accumulator to the axial piston unit. This is driven by the flow of oil and feeds its power as an engine to the vehicle's driveline. Energy flows between the vehicle and the HRB system are electronically controlled. MAN intends to make this system available in cooperation with Bosch Rexroth and various body manufacturers in the course of 2011.