CN104608611A - Air energy hydraulic hybrid urban bus - Google Patents

Abstract

The invention provides an air energy hydraulic hybrid urban bus which mainly comprises an engine and a bus chassis, and belongs to the field of transportation vehicles. The air energy hydraulic hybrid urban bus is characterized in that signals are input into an electrical control system (8) through a gear and clutch state detection device (9) and an accelerator pedal (7), a hydraulic system valve group block (10) is controlled to act, the pressure oil in an air compression tank (5) is conveyed to an inlet of an oil motor/oil pump (12), the oil motor (12) of a torque extraction window arranged on a gear box (3) is driven, and bus wheels (14) are driven by the gear box (3) to rotate; the kinetic energy generated in the braking process or the surplus energy in the economical working condition of the engine is recycled and converted to hydraulic energy to serve as an auxiliary power source, and an auxiliary hydraulic power system and a main power system of the engine are connected in parallel and gathered to the gear box. The system energy accumulation or energy discharging function is achieved through bus running state detection according to the will of a driver, and the dual purposes that the energy is saved, and the environment is protected are achieved.

Description

A kind of air energy hydraulic mixed power city bus

Technical field

the present invention relates to one with fuel oil, combustion gas etc. for the driving engine active force energy, during to run, self kinetic energy, potential energy etc. carry out being released to the city bus of HM Hydraulic Motor power source again by storing after hydraulic energy pressurized air, by the cooperation of driving engine active force and HM Hydraulic Motor auxiliary power, realize the object of energy-conserving and environment-protective, belong to traffic and transport field.

Background technology

the city bus of power is only provided by fuel oil, gas engine, due to reasons such as urban road is narrow, crowded, traffic lights are more, waiting station parking carryings, run under being often in the operating modes such as starting, parking, acceleration, deceleration, when braking deceleration, stopping-down or descending, its kinetic energy run and potential energy change into thermal waste by brake friction and fall, and cause energy consumption increase, exhaust emission increase.Take driving engine as active force, HM Hydraulic Motor is the air energy hydraulic mixed power city bus of auxiliary power, can effectively the operation kinetic energy of vehicle and descending potential energy be become hydraulic energy and store in air pressure case, discharge again in vehicle start, acceleration and when going up a slope, reduce driving engine at starting, acceleration and the load in the stage of upward slope, reach the effect of energy-conserving and environment-protective.

find through retrieval, the hybrid electric vehicle that namely rear driven mixed of Chinese utility model patent 200420059673.6 is a kind of take diesel motor as active force, HM Hydraulic Motor is auxiliary power.Because this patent is parallel rear-axle drive, there is the deficiency of some structure and fuction aspects: 1) from back axle power taking, the output speed of oil motor is low, with needing output torque large (flow/often turn larger) during power, thus the volume of oil motor, weight are comparatively large, and reduce the efficiency of oil motor because rotating speed is lower; 2) there is friction clutch in messenger chain, reduce the service life of system, add the mechanical energy loss of system.3) fuel tank of hydraulic efficiency pressure system is open type oil tank, and hydraulic oil is exposed in the environment of wind and rain, dust, easily pollutes, is oxidized, and causes fault ratio of hydraulic pressure system rising, efficiency of operation reduces, operation cost raises.

Summary of the invention

deficiency for parallel rear drive hybrid electric vehicle of the present invention, provides the hydraulic mixed power city bus technical scheme of the direct power taking driving of a kind of no-clutch, change speed gear box and leather diaphragm type dust-separation fuel tank.No-clutch simplifies the structure, and decreases mechanical energy loss, improves the reliability of the work of system; Change speed gear box is directly connected with oil pump/oil motor, selects the oil pump/oil motor compared with small dimension, reduce volume, weight because rotating speed is higher; Leather diaphragm type dust-separation fuel tank, has completely cut off the contact of hydraulic oil and air, decrease fluid oxidized, pollute.

the present invention is achieved through the following technical solutions.The present invention mainly comprises: the composition such as driving engine 1, power-transfer clutch 2, change speed gear box 3, drg 4, air pressure case 5, brake pedal 6, Das Gaspedal 7, electric control system 8, power-transfer clutch and shifting state detecting device 9, assembled hydraulic valve 10, leather diaphragm type dust-separation fuel tank 11, oil pump/oil motor 12, rear axle drive case 13, wheel 14.Its connection mode is driving engine 1, power-transfer clutch 2, change speed gear box 3, drg 4, rear axle drive case 13, wheel 14 forms main power system, and engine power output shaft is connected with transmission input shaft by power-transfer clutch, and input shaft gear engages with countershaft-gear, drive countershaft-gear rotates, and complete the object of Power output and gear shift after being mated with the shifting gear on output shaft of gear-box by the shifting gear on tween drive shaft, electric control system 8, power-transfer clutch and gear detection device 9, assembled hydraulic valve 10, oil pump/oil motor 12, leather diaphragm type dust-separation fuel tank 11 forms hydraulic pressure accessory power system, and the active force that driving engine provides and the auxiliary power that HM Hydraulic Motor provides mix and exported by output shaft of gear-box on change speed gear box tween drive shaft, are passed to rear axle drive case, drives rotation of wheel, drive vehicle movement, vehicle energy during braking and potential energy pass through wheel, rear axle drive case passes to output shaft of gear-box and drives hydraulic pump works by change speed gear box tween drive shaft, is transformed into hydraulic energy, change speed gear box tween drive shaft is connected by shift gear with HM Hydraulic Motor/hydraulic pump shaft, makes that hydraulic pressure accessory power system is in parallel with the main power system of driving engine to be intersected on change speed gear box.

the present invention is on the chassis of former automobile, install a set of air energy hydraulic pressure accessory power system additional, the potential energy when kinetic energy not only during recyclable car brakeing and descending, and also utilize pressurized air to store the power surplus under the economic working condition of driving engine, and when needing relatively high power for vehicle acceleration or upward slope etc., make the better effects if of energy saving standard.

structure is simple, cost is low, can regain within a short period of time and install cost additional, and it not only can be used for newly making automobile, and can carry out add-assembly to existing automobile easily.

power taking from change speed gear box power takeoff, rotating speed when making vehicle commonly use the speed of a motor vehicle and oil pump/oil motor greater efficiency is more identical, is conducive to the raising of oil pump/oil motor Volumetric efficiency.

oil pump/oil motor is connected with gearbox transmission direct geared by power takeoff and not by the friction clutch of restricted lifetime, simplifies mechanical drive link.

adopt leather diaphragm type fuel tank, with a block-shaped variable flexible oil resistant epithelium by case inner fluid and external environment condition and air completely isolated, but under the fluid in fuel tank is still in bar pressure all the time as open type oil tank.Both ensured that the normal leakage of hydraulic system element got back to fuel tank smoothly, and protected again fluid and do not polluted by the unclean environment in the outside of automotive operation, decrease fault, improve the reliability of hydraulic efficiency pressure system, reduce operation cost.

the present invention has substantial progress compared with prior art because of These characteristics.

accompanying drawing illustrates:

fig. 1 is System Working Principle block scheme of the present invention.

fig. 2 is the schematic diagram (consisting of example with inserted valve) of hydraulic efficiency pressure system of the present invention.

fig. 3 is the structural representation of leather diaphragm type fuel tank of the present invention.

specific embodiments:

below in conjunction with accompanying drawing, embodiment of the present invention are further described.

as shown in Figure 1, a kind of air energy hydraulic hybrid-power bus, can by the air energy hydraulic efficiency pressure system of the main power system of traditional fuel oil, combustion gas or electric motor and recovery (or storage) alternately or simultaneously for automobile provides power, the joint of two systems, on change speed gear box, constitutes hybrid power.

driving engine 1 is passed to change speed gear box 3 by power-transfer clutch 2 power and is driven wheel 14 again, forms the main power system of vehicle.Brake pedal 6 and the former brake gear 4 of vehicle realize braking, deceleration.

the intention of driver is inputed to electric control system 8 by gear and clutch state detecting device 9 and Das Gaspedal 7, the action of manipulation hydraulic efficiency pressure system valve chunk 10, the pressure oil in air compressing case 5 is made to lead to the import of oil motor 12, drive oil motor 12 to be with motor car wheel 14 to rotate by way of change speed gear box 3 vehicle is advanced or to driving engine 1 power-assisted, forms the accessory power system of vehicle.

when driver gently steps on brake pedal 6 and before the original brake system 4 of access failure vehicle, or driving engine 1 is when when economic working condition, power has more than needed, electric control system 8 manipulates the action of hydraulic efficiency pressure system valve chunk 10, oil in leather diaphragm type fuel tank 11 is pressed in air compressing case 5 by oil pump 12, and when realizing braking, recover kinetic energy or power margin store.

when vehicle needs anxious braking, driver firmly steps on brake pedal 6, and now recover kinetic energy braking works with the former brake system 4 of vehicle simultaneously, realize stronger braking, but the kinetic energy now reclaimed is less.

fig. 2, for inserted valve, describes air energy Hydraulic System Principle of the present invention.

when 2DT energising during 1DT power-off, it is energy accumulating state, now two-port valve 16 and two two electric change valves 15 are in closed condition, oil in leather diaphragm type fuel tank 11 is through non-resistance check valve (by gravity fall standard-sized sheet) 17, pumped by oil pump 12, through check valve 21 to air compressing case 5, complete accumulation of energy process, back down pilot overflow valve 22 when fluid arrives system specialization pressure and get back to leather diaphragm type fuel tank 11.

when 2DT power-off during 1DT energising, it is exoergic state, now the control chamber of two-port valve 16 communicates and decompression with fuel tank 11, pressure oil in air compressing case 5 backs down two-port valve 16, and push away on the spool of non-resistance check valve 17, after turning off the path of itself and fuel tank 11, pressure oil is made to lead to the import of oil motor 12, promote the pinion rotation that oil motor 12 drives change speed gear box 3, the oil of now oil motor 12 outlet, through being returned fuel tank unimpededly by the by pass valve 22 of two two electric change valve 15 short circuits, complete exoergic afterburner process.Impulsion during for preventing exoergic initial, the path of two two electric change valves 15 is provided with cutoff port (its latus rectum is greater than the cutoff port leading to control chamber in by pass valve 22), by pass valve 22 main valve plug is opened gently, makes exoergic afterburner process gentleer.

when the equal power-off of 2DT and 1DT, be idle loop state, the oil now in fuel tank 11, through non-resistance check valve 17, by oil pump 12 to the by pass valve 22 be shorted, returns fuel tank unimpededly.Vehicle is in normal motoring condition, and now driving engine 1 drives the oil pump 12 importing and exporting short circuit to dally by change speed gear box 3, and consumed energy is few.

leather diaphragm type fuel tank shown in Fig. 3 passes in and out adapter 29 by casing 25, epithelium 26, case lid 28, cap bore filter 27, case lid fix screw 24, nut 23 and fluid and forms.Nut 23 and screw 24 are clipped in the oil resistant epithelium 26 of softness on the bead of case lid 28 and casing 25 admittedly, and epithelium 26 top to be communicated with air by cap bore filter 27 and is always bar pressure, is the container of fluid between epithelium 26 times and casing 25 inside face.During accumulation of energy, fluid is pumped to air compressing case 5, and liquid level declines, and epithelium 26 againsts fluid Surface Subsidence under barometric pressure effect; The fluid release oil sump tank of air compressing case 5 during exoergic, liquid level rises and holds up epithelium 26.Fluid is imported and exported on a big scale, fuel tank liquid level sharply changes is the feature of native system, with common open type oil tank because respiration is large, very easily contaminated; When using sealed reservoir, the pressure on its liquid level, changes because liquid level is fluctuated violently, also the stable operation of unfavorable hydraulic efficiency pressure system.

this air energy hydraulic mixed power city bus, structure is simple, and system is reliable, and low cost of manufacture is easy to maintenance, obvious energy conservation.Be particularly suitable for the city bus automobile of Fraquent start, brake, be also applicable to truck and urban taxi.

Claims (1)

1. an air energy hydraulic mixed power city bus, mainly comprise driving engine, public transport vehicle chassis, it is characterized in that, by gear and clutch state detecting device (9) and Das Gaspedal (7), signal is inputed to electric control system (8), chunk (10) action of manipulation hydraulic efficiency pressure system valve, the pressure oil in air compressing case (5) is made to lead to the import of oil motor/oil pump (12), drive installation, at the oil motor (12) of the upper power taking window of change speed gear box (3), is rotated by way of change speed gear box (3) band motor car wheel (14), when driver gently steps on brake pedal (6) and the original brake system of access failure vehicle (4) is front, or driving engine (1) is when when economic working condition, power has more than needed, chunk (10) action of electric control system (8) manipulation hydraulic efficiency pressure system valve, oil in leather diaphragm type fuel tank (11) is pressed in air compressing case (5) by oil pump/oil motor (12), leather diaphragm type fuel tank (11) is by casing (25), epithelium (26), case lid (28), cap bore filter (27), case lid fix screw (24), nut (23) and fluid turnover adapter (29) are formed, nut (23) and screw (24) are clipped in the oil resistant epithelium (26) of softness on the bead of case lid (28) and casing (25) admittedly, epithelium (26) top is communicated with air by cap bore filter (27) and is always bar pressure, it is the container of fluid under epithelium (26) and between casing (25) inside face, when 2DT energising during 1DT power-off, oil in leather diaphragm type fuel tank (11) is through non-resistance check valve (17), pumped by oil pump (12), through check valve (21) to air compressing case (5), fluid backs down pilot overflow valve (22) when arriving system specialization pressure and gets back to fuel tank (11), when 2DT power-off during 1DT energising, pressure oil in air compressing case (5) backs down two-port valve (16), and push away on the spool of non-resistance check valve (17), turn off the path of itself and fuel tank (11), make pressure oil lead to the import of oil motor (12), the path of two two electric change valves (15) is provided with cutoff port, when the equal power-off of 2DT and 1DT, the oil in this fuel tank (11), through non-resistance check valve (17), by oil pump (12) to the by pass valve be shorted (22), returns fuel tank (11) unimpededly.