Title:
【発明の名称】ポンプトルク制御方法
Document Type and Number:
Japanese Patent JP2752501
Kind Code:
B2
Abstract:
A torque control system for variable delivery pumps (2a)(2b) receiving torque from an engine employs a signal related to an engine torque available at each engine speed setting to control the torque, and thus the amount of engine power that is absorbed by the variable delivery pumps (2a)(2b). In a low-power regime, wherein the fuel injected into the engine is less than maximum, torque control is effected by comparing the available torque with an amount of torque that would be available at maximum fuel injection. In a high-power regime, wherein the fuel injected is at least a predetermined value, torque control is effected by comparing the available torque with an amount of torque that is available at a combination of a set engine speed (10) and an actual engine speed (11). A bias circuit biases the stable speed operating point a small amount below the maximum speed, whereby improve fuel economy is attained. In a system with more than one variable delivery pump, when less than the full number of pumps (2a)(2b) is employed, control is effected in the low-power regime, even though all pumps in service are receiving maximum fuel.
Inventors:
MORYA NAOYUKI
SAMEJIMA MAKOTO
SAMEJIMA MAKOTO
Application Number:
JP12884890A
Publication Date:
May 18, 1998
Filing Date:
May 18, 1990
Export Citation:
Assignee:
SHIN KYATAPIRAA MITSUBISHI KK
International Classes:
F02D29/04; F04B1/32; F04B49/00; F04B49/06; (IPC1-7): F04B49/00
Domestic Patent References:
| JP58210383A | ||||
| JP6229780A |
Attorney, Agent or Firm:
Kabazawa Xiang (3 people outside)