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32附 錄 ADedicated fire engine chassis configuration of the market demand and program analysisMahoney.GThrough research that the market volume of fire, in 2002 2 800 2003 3 000 vehicles in 2005 is expected to reach 4 000. Market demand for the vehicles on fire in the main, mainly for heavy vehicles. One medium (containing the quality of 8 ~ 10 t) accounted for 40% of the total market, heavy trucks accounted for 60% of the total market and market share of heavy vehicles a rapid upward trend. From the regional market, the domestic medium-sized southern region the use of fire engines, to occupy a market share of 60%, 30% heavy vehicles, and the remaining 10% of the basic 5 t for the following vehicles; the northern region accounts for 50% of medium-sized vehicles,40% of heavy vehicles, and the remaining 5 t for the following vehicles. Existing market structure fire in the cab, more a 4 door double cab seat, representing about 80% of the total market. However, products currently cab chassis is generally flat or semi-exclusive single-row, manufacturers of fire engines are hand-completed restructuring of the double cab, the interior after the reform with the original vehicle interior is not well unified.Configuration analysis of market demand(1) Cab: Request for two-row, four door, back door and the front door using the same two time as much as possible to wide, usually 800 mm ~ 850 mm, in order to fast access to the members. At the same time, the crew requested that the second row seat is reserved space for installation of air-breathing apparatus, that is, away from the door after the hoardings column 200 mm ~ 230 mm. Crew of 4 to 6 people. Indoor driving force control access to configuration control and configuration of hydraulic double flip device driver.(2) Engine: Model of the general requirements for engine power 157 ~ 172 kW; heavy vehicle engine power requirements for the 209 ~ 261 kW. To the whole engine with governor, at the same time in line with the European Ⅱ emission standard.(3) check of Power: Request for the sandwich-type configuration check our full power, and the output speed of about 3 000 rpm, the engine rotation to the same ratio to the specific - 33requirements of fire pumps in accordance with the choice. Power output flange from the center is to be located in the center line of the location of the frame, the center distance of the frame on the plane about 160 mm.(4) fuel tank, reservoir pump and air filter arrangement of requirements: the requirements of small volume fuel tank, 180 ~ 200 L capacity, Drum. Reserve pump beam at the inside of the requirements for easy layout modification. Vertical space requirements of the installation of filters on the cab back, ease of maintenance and installation, at the same time, to meet the larger frame length can be used.(5) Wheelbase: medium requested about 4 500 mm wheelbase, wheelbase requirement for heavy vehicles in the 4 200 mm ~ 4 500 mm (+ 1 350 mm).Existing resources and analysis of the situation(1) as a result of a fire engine chassis require more personalized, two-row seat cab chassis plant in general very difficult to accomplish, most of the existing manual system used to complete the cost of the basic restructuring of the 111 million.(2) typically selected from edge Qinchuan Gear Factory in Shaanxi Province and part of a fire engine manufacturers to develop their full power from the power device. Model of Power in price from 0.17 million yuan in about heavy vehicles access prices of Power 113 ~ 115 million.(3) are the installation of chassis imported fire engines from full power force, and made only Chongqing Isuzu chassis supporting the development of power from full power, and not to install.Domestic market demand for fire engines are about 3 000 per year. How to give full play to the advantages of Chinese-made chassis, revitalize national industry, vigorously develop the domestic fire engines, each chassis manufacturers should pay attention to the issue, otherwise, continuing influx of foreign brands in today, we will lose this part of the conversion of their own car market.Domestic and foreign production of foam fire engines used to provide the vehicle manufacturer General Motors chassis II. Its dedicated power devices include access, and water tank foam, equipment boxes, pumping stations, fire pumps, vacuum pumps, the proportion of mixed foam and fire guns and other devices of its working principle is: through the power device from the vehicle chassis engine power output and by a gear-driven fire pump through the fire pump and foam mixing ratio of water and foam device according - 34to a certain percentage of mixed, and then by the gun fire and fire-fighting foam extinguishing gun smoke. Therefore, the request must meet certain chassis and engine power of the load.At present, national standards have been developed, based on the chassis selected GB6244286 "generic fire engine chassis series, type, the basic parameters and technical requirements" of the national standards for selection, according to industry standards GA3915292 "General technical requirements foam fire engine," the requirements of Appendix A choice of engines power to meet its requirements.Power output deviceDomestic use of foam fire engines from the main vehicle engine power means taking power device layout can take many forms, and heavy-duty foam fire engines currently in use are placed in power will take the main transmission between the clutch and get the sandwich-type force device (front-transmission) and check power transmission shaft (rear-mounted transmission) in two forms. Check the use of sandwich-type main engine power will take out the power transmitted by the drive system of pumps, pump-driven operation, can achieve double-action feature. At present, most of the use of this form.Water - foam tankWater - foam tank foam fire extinguishing agent fire engines on the loading of the main container, in accordance with the development of the industry can fire a variety of materials, on behalf of the last century the use of glass fiber reinforced polyester material, now that the application of the progressive development of high-quality carbon steel materials and stainless steel materials.Equipment boxesThe use of equipment boxes welded steel frame structure, with enough aluminum alloy or steel plate. In recent years, the equipment layout of the internal structure of box can be divided into four types: fixed-delimited file type, that is, separated by files of various framework is fixed, non-regulation; activities separated by file type, that is separated from the framework of the production of aluminum alloy profiles located within the Des pattern plate, adjustable interval; sliding drawer type, that is, the production of push-pull drawer for easy access to the form of equipment, but the production of more complex; rotating frame, the separation of file system is about to make a small rotating equipment can be separated files, foreign The import of this form of use of fire engines. At present, the new models - 35made use of the integrated use of four forms,Structured according to the actual layout.Fire pumpAt present, the foam fire engine fire pump configuration can be broadly classified into three categories: pressure pump (low pressure pump), or single-stage centrifugal pump, such as BS30, BS60, BS40, R100 (imported), etc.; in the combination of low pressure fire pumps, multi-stage centrifugal pump. If 20110/20 140,20110 / 30 160,20110 / 35170, KSP1000 (imported), etc.; high and low pressure pump, such as the NH20, NH30 (imports), 40110 / 6 130 and so on. Equipped with fire pumps in the home and post the minutes.Pumping StationPumping station and equipment, like me, more than just type the framework for the whole welded structure, in addition to placement outside the fire pump, general pump is also available with space-related equipment in order to operate the fire department.Keyword: Fire engines; chassis; market demand- 36