Control device and method for power limit load of full-hydraulic rubber-tyred roller
A technology of tire roller and control method, which is applied in the field of construction machinery, can solve problems such as loss, engine flameout, hydraulic system impact, etc., and achieve the effects of prolonging service life, reducing fuel consumption, and reducing instantaneous speed increase
Inactive Publication Date: 2014-05-14
柳工无锡路面机械有限公司
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Problems solved by technology
When the engine works at a certain speed, its output power is constant. If the input power of the current pump is greater than the output power of the engine (when normal driving encounters obstacles or the whole machine is in a climbing condition), the engine will slow down In order to ensure the maximum torque, if the speed drop range exceeds the engine’s tolerable speed drop value, the engine will stall; in addition, due to the relatively large mass of the tire roller, when the engine speed drops rapidly when braking at high speed, the hydraulic exhaust will The pump is lowered, but at this time, the speed of the motor is still relatively high, causing the motor to drive the pump in reverse, causing the engine to increase instantaneously, which has a great impact on the compaction degree of the full hydraulic tire roller and the life of the engine, and may lead to danger in severe cases and cause major economic losses
This situation affects the normal operation of the roller. If the frequent speed drop or flameout or the instantaneous speed increase is relatively large, it will affect the service life of the engine, and also cause impact on the hydraulic system, affecting the service life of the pump and motor. More importantly, , frequent speed drops seriously affect the compaction effect of the road surface
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[0033] see figure 1 and figure 2 , the present invention relates to a control device for the power limit load of a fully hydraulic tire roller, the control device includes a controller U3, the controller U3 is connected with a speed sensor U4 and a speed sensor U5, and the controller The U3 signal input terminal is connected with the brake pedal U6 signal output terminal through wires, so that when the brake pedal U6 is stepped on, the controller U3 can immediately obtain the corresponding signal, and the electronic control system ECU signal input terminal of the engine U2 is connected with the accelerator pedal. The signal output end of the pedal U1 is connected through wires, and the accelerator pedal U1 provides accelerator acceleration and deceleration signals for the engine U2. The engine U2 is connected to the hydraulic pump Y1 through a coupling, and the hydraulic pump Y1 is connected to the hydraulic motor through a pipeline. The first Y2 is connected with the hydrau...
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The invention relates to a control device for power limit load of a full-hydraulic rubber-tyred roller. The control device comprises a controller (U3), wherein a velocity sensor I (U4) and a velocity sensor II (U5) are connected onto the controller (U3); the controller (U3) is connected with a brake pedal (U6); an ECU (Electronically Controlled Unit) of an engine (U2) is connected with an accelerator pedal (U1); the engine (U2) is connected with a hydraulic pump (Y1) through a coupler; the hydraulic pump (Y1) is connected with a hydraulic motor I (Y2) and a hydraulic motor II (Y3) through pipelines; and the controller (U3) is respectively connected with signal input ends of electro-hydraulic proportional valves on the hydraulic pump (Y1), the hydraulic motor I (Y2) and the hydraulic motor II (Y3). The cruise control device for the full-hydraulic rubber-tyred roller provided by the invention can regulate and control the power of the full-hydraulic rubber-tyred roller.
Description
technical field [0001] The invention relates to a control device, in particular to a control device and method for controlling power limit loads on a full hydraulic tire roller, belonging to the technical field of engineering machinery. Background technique [0002] The engine of the full-hydraulic tire roller is directly connected to the hydraulic pump through the coupling, and the hydraulic pump drives the motor. The foot accelerator pedal is directly connected to the special accelerator input signal terminal provided by the engine ECU, and the brake pedal output signal is connected to the dedicated input signal terminal of the controller. , the operator adjusts the output power of the engine by stepping on the accelerator pedal, and the engine transmits the power directly to the hydraulic pump through the coupling, thereby controlling the output power of the hydraulic pump and the motor. When the engine works at a certain speed, its output power is constant. If the input ...
Claims
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IPC IPC(8): E01C19/27
Inventor邓振中董程炜张霖杨明岳红军
Owner柳工无锡路面机械有限公司