Starting and flameout control system of diesel engine of excavator

Abstract

The invention discloses a starting and flameout control system of a diesel engine of an excavator. The starting and flameout control system of the diesel engine of the excavator comprises a storage battery, a power supply relay, a key switch, a starting relay, a controller, an accelerator motor and an engine system. An engine, a generator, a starting motor, an accelerator oscillating bar and a rotating speed sensor are arranged inside the engine system. The storage battery is respectively connected with the key switch, a B end of the generator, the power supply relay and the controller. The key switch is respectively connected with the power supply relay and the starting relay. The power supply relay is respectively connected with the accelerator motor, an L end of the generator and the starting relay. The starting relay is respectively connected with the starting motor and the L end of the generator. The controller is respectively connected with the accelerator motor and the rotating speed sensor. The accelerator motor is connected with the accelerator oscillating bar. The starting and flameout control system of the diesel engine of the excavator has the advantages that flameout of the engine can be achieved without the need for a flameout motor or a flameout electromagnetic valve, and therefore system stability is improved, and cost is lowered.

Description

technical field [0001] The invention relates to an excavator control system, in particular to an excavator diesel engine startup and flameout control system. Background technique [0002] As a commonly used construction machine, excavators are widely used in earthwork construction, urban construction, farmland water conservancy construction and other occasions. As the power source of the excavator, the engine is self-evident in its control. [0003] At present, diesel engines are mostly controlled by a combination of a throttle motor and a flameout motor or a flameout solenoid valve. The flameout motor or flameout solenoid valve is used to control the on-off of the engine's fuel circuit to realize the flameout control of the engine; the throttle motor controls the fuel supply of the engine to realize Control of engine speed. Engine start-up process: turn off the motor or solenoid valve to open the fuel circuit of the engine, turn the key switch to the "start" state, start ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the above starting and flameout control method is that the combined control of the throttle motor and the flameout motor or the flameout solenoid valve is used at the same time, and the cost is high, and if the flameout motor or the solenoid valve fails, it will cause engine control failure, unable to flameout, resulting in engine start and flameout The failure points of the control system increase and the reliability decreases

Images