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EP0899151A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Torque shock alleviating device in hybrid vehicle

Assignee: Honda Motor Co Ltd
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Filing: 1998-08-24
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Granted: —
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Expires: 2018-08-24
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Abstract

Abstract A torque shock alleviating device in a hybrid vehicle utilizing both an engine and an electric motor as drive sources, whereby a torque shock is not generated when the rich-spiking of the air-fuel mixture is carried out in order to restore the adsorbing ability of an NOx adsorbing device in the hybrid vehicle. When an engine is operated in a lean burn manner, NOx in an exhaust gas is adsorbed to an NOx adsorbing device provided in an exhaust passage. When the adsorbing ability of the NOx adsorbing device reaches a saturated level, a rich-spiking for temporarily enrichening the air-fuel mixture of the engine is carried out to restore the adsorbing ability of the NOx adsorbing device. When the output torque from the engine is increased by the rich-spiking, a regenerative braking force is generated in a motor, thereby moderating the increase in output torque from the engine by such regenerative braking force to alleviate the torque shock. An electric power generated by the regenerative braking is supplied for the charging of a battery.

Inventors

  • 👤 Toshikatsu Kk Honda Gijutsu Kenkyusho Takanohashi
  • 👤 Kazutomo c/o K.K.Honda Gijutsu Kenkyusho Sawamura
  • 👤 Teruo c/o K.K.Honda Gijutsu Kenkyusho Wakashiro
  • 👤 Hiroshi c/o K.K.Honda Gijutsu Kenkyusho Ohno

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 20:36
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/48; B60K6/485; B60W; B60W20/00; B60W20/10; B60W20/15; B60K6/50; B60K6/54; B60L; B60L50/00; B60L50/10; B60L50/15; B60W10/00; B60W10/04; B60W10/06; B60W10/08; B60W2710/00; B60W2710/06; B60W2710/0616; B60W2710/0622; F; F02; F02D; F02D41/00; F02D41/02; F02D41/021; F02D41/0235; F02D41/024; F02D2041/026; F02D41/027; F02D41/0275; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40; Y02T10/60; Y02T10/62; Y02T10/70; Y02T10/7072; Y02T10/72; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/905; Y10S903/915; Y10S903/917

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 204 words
A torque shock alleviating device in a hybrid vehicle comprising: an engine which drives a wheel; a motor connected to said engine to generate an assisting driving force and a regenerative braking force; an accumulating device for supplying electric power to said motor and which is charged with a regenerative power generated by said motor, a motor control device for controlling the assisting driving force and regenerative operations of the motor; an engine control device for controlling an air-fuel ratio of an air-fuel mixture supplied to said engine; and an NOx adsorbing device provided in an exhaust passage for adsorbing NOx generated when the air-fuel ratio of the air-fuel mixture supplied to said engine is controlled to be leaned by said engine controlling device, wherein when the adsorbing ability of the NOx adsorbing device reaches a saturated level, the air-fuel ratio of the air-fuel mixture is enrichened by the engine control device to release NOx adsorbed to said NOx adsorbing device, wherein said motor control device causes said motor to generate said regenerative braking force upon enrichening of the air-fuel mixture by said engine control device, thereby moderating the variation in output torque from said engine caused by the enrichening of the air-fuel mixture.
Claim 2
Dependent Claim 45 words
The torque shock alleviating device in a hybrid vehicle according to claim 1, wherein, whenever it is determined that said accumulating device cannot be charged, said motor control device prohibits the regenerative operation of said motor, by monitoring the charged state of said accumulating device.

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