公开(公告)号：WO2015067568A1

公开(公告)日：2015-05-14

申请号：PCT/EP2014/073608

申请日：2014-11-03

Applicant: CATERPILLAR SARL

Inventor： TADA, Shogo ,  OHKUBO, Masafumi ,  NAKAMOTO, Yozo

IPC: E02F9/22 ,  F02D29/04

CPC classification number: E02F9/2246 ,  E02F3/32 ,  E02F9/2066 ,  E02F9/2232 ,  E02F9/2292 ,  E02F9/2296 ,  F02D29/04 ,  F02D41/04 ,  F02D2200/50

Abstract: Provided is a work machine which that includes compatibility of a reduction in fuel during a normal working mode and ensuring a travelling speed and output in severe travelling conditions. A work machine has a work device mounted on a machine body including a fluid pressure motor for travelling, and a controller reduces an engine speed so as to be lower than a rated engine speed during a normal working mode. The controller controls an engine speed so as to obtain a pump flow rate in accordance with a target travelling speed during a travelling low-load mode when an engine load is lower than a threshold. The controller controls both the engine speed and an output torque for pump control so that the engine output becomes maximum during a travelling high-load mode when the engine load is higher than the threshold.

Abstract translation: 提供一种作业机械，其包括在正常工作模式期间燃料减少的兼容性，并确保行驶速度和在恶劣的行驶条件下输出。 工作机具有安装在机身上的作业装置，该机体包括用于行进的流体压力马达，并且控制器在正常工作模式期间将发动机转速降低到低于额定发动机转速。 控制器控制发动机转速，以便当发动机负载低于阈值时，在行驶低负荷模式期间根据目标行驶速度获得泵流量。 控制器控制发动机转速和泵控制的输出转矩，使得当发动机负载高于阈值时，在行驶高负荷模式期间发动机输出变为最大。

公开(公告)号：WO2015114061A1

公开(公告)日：2015-08-06

申请号：PCT/EP2015/051854

申请日：2015-01-29

Applicant: CATERPILLAR SARL

Inventor： OHKUBO, Masafumi ,  TADA, Shogo ,  AKIYAMA, Seiichi ,  OZAWA, Yuki ,  HATA, Yoshihiko

IPC: E02F9/22 ,  B60W10/06 ,  B60W10/30 ,  B60W30/188 ,  F02D41/02 ,  F04B1/32 ,  F04B49/06 ,  F02D29/04

CPC classification number: E02F9/2246 ,  B60W10/06 ,  B60W10/30 ,  B60W30/1882 ,  B60W2710/0644 ,  B60W2710/0666 ,  B60W2710/0677 ,  E02F3/32 ,  E02F9/2235 ,  E02F9/2296 ,  F02D11/105 ,  F02D29/04 ,  F02D31/001 ,  F04B1/324 ,  F04B49/065 ,  F15B11/08 ,  F15B21/087 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/275 ,  F15B2211/6309 ,  F15B2211/633 ,  F15B2211/6333 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/6658 ,  F15B2211/70

Abstract: Provided is an engine and pump control device (7) in which improvement effect of fuel efficiency and work efficiency can be obtained while maintaining predetermined output without performing mode switching. The engine and pump control device (7) includes functions to control engine rotating speed of an engine (12) based on requested engine rotating speed set by an accelerator dial (21) and to control engine torque by controlling a swash plate angle of a variable displacement pump (11) driven by the engine (12). A controller (22) has a function to, when a pump discharge pressure changes from a flow rate control area in which a pump discharge flow rate is controlled at a low load to an output control area in which engine output is controlled at a middle or high load, calculate each value of the reduced engine rotating speed and the increased engine torque on condition that the product of the engine rotating speed by the engine torque is maintained within a predetermined output level and control the engine rotating speed based on these values and also control the swash plate angle of the variable displacement pump (11).

Abstract translation: 提供一种发动机和泵控制装置（7），其中在不执行模式切换的同时保持预定的输出，可以获得燃料效率和工作效率的改善效果。 发动机和泵控制装置（7）包括基于由加速器拨盘（21）设定的所要求的发动机转速来控制发动机（12）的发动机转速的功能，并且通过控制变量的斜盘角来控制发动机转矩 由发动机（12）驱动的排量泵（11）。 控制器（22）具有如下功能：当泵排出压力从将泵排出流量控制在低负荷的流量控制区域变更为将发动机输出控制在中间的输出控制区域 在发动机转速的乘积保持在预定的输出水平内并且基于这些值控制发动机转速的条件下，计算发动机转速降低和发动机扭矩增加的每个值 控制可变排量泵（11）的斜盘角度。