US 6,650,990 B2Granted

Vehicular running control apparatus

AssigneeNissan Motor Co., Ltd.

InventorsYoshinori Yamamura, Yoji Seto

Life of this patent

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Abstract

A target orbit of an inter-vehicle distance is calculated based on an inter-vehicle distance command value, a target orbit coincident-host vehicle running speed command value for according the inter-vehicle distance with the target orbit is calculated, and a reference host vehicle running speed command value is calculated by use of the target orbit and the target orbit coincident-host vehicle running speed command value. Moreover, a preceding vehicle acceleration is detected, and a value obtained by multiplying the preceding vehicle acceleration by a response time constant of a host vehicle running speed control system is added to the reference host vehicle running speed command value, thus a host vehicle running speed command value is calculated and set, whereby an influence of the preceding vehicle acceleration is removed, and a follow-up characteristic to an inter-vehicle distance target value is improved. When ride comfort is lowered due to an influence of a noise, a gain multiplied with the preceding vehicle acceleration is made variable in a range from the response time constant to zero, whereby a feedback effect of the preceding vehicle acceleration is controlled.

Claims11

Dependent claims

A vehicular running control apparatus, comprising:

an inter-vehicle distance detection device configured to detect an inter-vehicle distance between a host vehicle and a preceding vehicle;
a host vehicle running speed detection device configured to detect a host vehicle running speed;
a target inter-vehicle distance setting device configured to set a target inter-vehicle distance between the host vehicle and the preceding vehicle based on the inter-vehicle distance detected by the inter-vehicle distance detection device and the host vehicle running speed detected by the host vehicle running speed detection device;
a host vehicle running speed command value calculation device configured to calculate a running speed command value of the host vehicle based on the inter-vehicle distance detected by the inter-vehicle distance detection device, the host vehicle running speed detected by the host vehicle running speed detection device and the target inter-vehicle distance set by the target inter-vehicle distance setting device;
a preceding vehicle acceleration detection device configured to detect an acceleration of the preceding vehicle;
a host vehicle running speed command value correction device configured to multiply the acceleration of the preceding vehicle, the acceleration being detected by the preceding vehicle acceleration detection device, by a specified gain to calculate a host vehicle running speed command value correction amount, and to add the host vehicle running speed command value correction amount to the host vehicle running speed command value to calculate a corrected host vehicle running speed command value;
and
a host vehicle running speed control device configured to control the host vehicle running speed based on the corrected host vehicle running speed command value corrected by the host vehicle running speed command value correction device,
wherein a response time constant when the host vehicle running speed control device controls the host vehicle running speed based on the corrected host vehicle running speed command value is set at the specified gain multiplied with the acceleration of the preceding vehicle.

6 more elements

A vehicular running control apparatus, comprising:

inter-vehicle distance detection means for detecting an inter-vehicle distance between a host vehicle and a preceding vehicle;
host vehicle running speed detection means for detecting a host vehicle running speed;
target inter-vehicle distance setting means for setting a target inter-vehicle distance between the host vehicle and the preceding vehicle based on the inter-vehicle distance detected by the inter-vehicle distance detection means and the host vehicle running speed detected by the host vehicle running speed detection means;
host vehicle running speed command value calculation means for calculating a running speed command value of the host vehicle based on the inter-vehicle distance detected by the inter-vehicle distance detection means, the host vehicle running speed detected by the host vehicle running speed detection means and the target inter-vehicle distance set by the target inter-vehicle distance setting means;
preceding vehicle acceleration detection means for detecting an acceleration of the preceding vehicle;
host vehicle running speed command value correction means for multiplying the acceleration of the preceding vehicle, the acceleration being detected by the preceding vehicle acceleration detection means, by a specified gain to calculate a host vehicle running speed command value correction amount, and for adding the host vehicle running speed command value correction amount to the host vehicle running speed command value to calculate a corrected host vehicle running speed command value;
and
host vehicle running speed control means for controlling the host vehicle running speed based on the corrected host vehicle running speed command value corrected by the host vehicle running speed command value correction means,
wherein a response time constant when the host vehicle running speed control means controls the host vehicle running speed based on the corrected host vehicle running speed command value is set at the specified gain multiplied with the acceleration of the preceding vehicle.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/115,002Filed 4 Apr 2002
Priority: JP 2001-14083811 May 2001
Published: US 2002/0169538 A114 Nov 2002
Granted: 18 Nov 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B60K 31/0008
Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an…:…
B60W 2050/0012
Automatic control, details of type of controller or control system architecture: feedforward or open loop systems
B60W 2050/0052
Signal treatments, identification of variables or parameters, parameter estimation or state estimation: filtering, filters
B60W 2720/106
Longitudinal speed: longitudinal acceleration