Automatic idling control method for hybrid excavator
A hybrid, idle speed control technology, applied in the direction of earth mover/shovel, construction, etc., can solve the problems of low fuel economy, long transition time, affecting operability, etc., so as to avoid the failure of the air conditioner to start and cool down. Water temperature is too low, the effect of reducing transition time and reducing fuel consumption
Inactive Publication Date: 2014-04-09
ZHEJIANG UNIV
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Problems solved by technology
[0009] 1. During the process of deceleration and acceleration of the engine, the transition time will be very long due to the large change of the rotational speed, which will affect the operability;
[0010] 2. Although the fuel consumption of the engine is low at idle speed, the power of the engine is wasted doing useless work at this time, and the fuel economy is still not high
Method used
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Embodiment 1
[0032] Embodiment 1, Figure 1 ~ Figure 2 An automatic idle speed control method for hybrid excavators is given, which effectively reduces fuel consumption and also reduces the transition time of engine speed changes. The hybrid excavator automatic idle speed control method described above includes a hybrid construction machine with a coaxially connected engine and a generator / motor structure, such as a hybrid excavator with a coaxially connected engine and a generator / motor structure.
[0033] like figure 1 As shown, it is a flow chart of a hybrid excavator control method of the present invention.
[0034] Set the pilot pressure threshold to 10bar, the deceleration time to 6s, the shutdown time to 12s, the capacitor state of charge threshold to 0.9, the cooling water temperature threshold to 70°C, the minimum starting speed of the engine to 200rpm, and the initial starting torque to 200Nm.
[0035] The control steps are as follows:
[0036] 1) It is the first time to judge...
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The invention discloses an automatic idling control method for a hybrid excavator, and relates to hybrid engineering machinery with a coaxially-connected engine and generator / motor structure. The method includes setting a pilot pressure threshold, deceleration time, conditions for shutting down an engine and an idle speed of the engine; detecting the pilot handle pressure and downtime of the engine, when the pilot handle pressure is lower than the set pilot pressure threshold and the downtime of the engine exceeds the set deceleration time, decelerating the engine into the idle speed; when the engine is in the idle speed, detecting the state of charge of a capacitor, and setting a torque value corresponding to a generator / motor so as to charge the capacitor according to the detected state of charge of the capacitor; when the conditions for shutting down the engine are met, shutting down the engine; when the pilot handle pressure is detected being higher than the set pilot pressure threshold, setting the speed of the engine to be the operating speed corresponding to the current accelerator position.
Description
technical field [0001] The invention relates to an automatic idle speed control of a hybrid power construction machine, in particular to an automatic idle speed control of a hybrid power excavator. The hybrid engineering excavator should have a coaxially connected engine and generator / motor structure. Background technique [0002] Energy saving and environmental protection is a major issue facing the development of human society, and it has been paid more and more attention. An excavator is a widely used construction machine. During the construction process, the excavator needs to be in a waiting state in many cases, and this situation is very frequent. At this time, in order to reduce fuel consumption and reduce noise, the engine speed is reduced to idle state. [0003] The automatic idle speed control of traditional excavators is: [0004] 1. When it is detected that the handle has no action time and reaches the first idle time, reduce the engine speed to a high idle st...
Claims
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Inventor 王庆丰朱骞
Owner ZHEJIANG UNIV