Nissan Motor Company Limited

Jatco Corporation

Taiichi Onoyama

Kakuzou Kaneko

Shingo Suzuki

Kenichi Watanabe

Hironori Miyaishi

Tetsuya Izumi

Akito Suzuki

Kouichi Kotsuji

Masumi Fujikawa

Keisuke Iwado

Tomoyuki Mizuochi

Terumasa Hidaka

Ryuichi Arai

Takanobu Mouri

Ryuzo Noguchi

Satoshi Harui

Akihiro Toyofuku

Seishi Shimamura

Ken Ito

Kazutaka Adachi

Koichi Hayasaki

Shinichiro Joe

Munetoshi Ueno

Hiroshi Abe

Haruhisa Tsuchikawa

Tsuyoshi Yamanaka

Tadashi Okuda

Takeo Aizawa

Kazuyuki Kouno

Kazuhiro Miyachi

Toshihiro Hirai

Takayuki Ujifusa

An oil pump driving control device of a vehicle having a main oil pump () that is driven by a motor/generator () and produces a pump discharge oil to a first clutch (), a second clutch () and a belt-type continuously variable transmission () provided on a driving force transmission line. A hybrid control module () is provided in this FF hybrid vehicle. The hybrid control module () is configured to perform a control so that during vehicle stop, the lower an ATF oil temperature is, the more the pump driving energy to drive the main oil pump () is decreased. With this control, consumption energy during the vehicle stop can be reduced.

Vehicle oil pump driving control device

A controller is provided so as to control, when an electric vehicle (EV) mode is selected, a belt clamping pressure on the basis of discharged oil from a main oil pump which is driven by a motor generator. The controller is provided for a hybrid vehicle and is configured to perform control such that when the vehicle is stopped in the EV mode and a creep cut condition which does not require creep torque from the motor generator is met, a first motor idling rotation speed is set as a motor rotation speed. When the vehicle is stopped in the EV mode and a standby learning control completes learning of a zero-point oil pressure command value, the controller reduces a rotation speed of the motor generator to a second motor idling rotation speed which is lower than the first motor idling rotation speed.

Control device for hybrid vehicle

A hybrid vehicle drive control system is configured to perform engine startup when switching from an electric drive mode to a hybrid drive mode, without creating a sense of output torque loss. In particular, a controller selectively controls a first clutch disposed between the engine and the motor/generator and a second clutch disposed between the motor/generator and a drive wheel to switch between an electric drive mode in which the first clutch is released and the second clutch is engaged, and a hybrid drive mode in which both the first and second clutches are engaged. The controller sets the second torque transfer capacity to a value that is more than zero and less than the target motor/generator torque of the motor/generator when switching from the electric drive mode to the hybrid drive mode and when starting the engine.

Hybrid vehicle drive control system

In general, an oil pump driving control device for a hybrid vehicle is described. A hybrid vehicle includes a drive-train configured and arranged to transmit power in the order of an engine, a first clutch, a motor generator, a second clutch and a drive wheel, and an oil pump operably configured and arranged at a location between the first clutch and the second clutch such that the oil pump is mechanically driven by at least one of the engine and the motor generator. The invention provides an oil pump driving control device that supplies the necessary oil pressure for an automatic transmission with only a single mechanical oil pump. For example, even when it is not possible to maintain tightening of the second clutch, oil pressure may be supplied by rotating the oil pump using the motor generator. In this way, the oil pressure may be supplied with a single oil pump.

Oil pump driving control device for a hybrid vehicle

A drive train for a hybrid electric vehicle has an engine, first and second motor/generators, a third motor, and a transmission in connecting relationships with the engine, the motor/generators, and the third motor. The transmission has planetary gear sets to be shifted among a plurality of running modes including a large driving force running mode. A controller controls surplus power caused by power balance between the first and second motor/generators to be supplied to the third motor when the surplus power is generated and the vehicle starts with the transmission being operated in the large driving force running mode.

Drive train for hybrid electric vehicle

A vehicle with an automatic engine stop/restart function comprises an engine, an automatic transmission having an oil pump driven in synchronism with the engine to supply an oil pressure to the automatic transmission, an oil pressure controller to hold the oil pressure in the automatic transmission during an automatic stop of the engine, and a control system. The control system is configured to: determine whether the oil pressure in the automatic transmission becomes lower than a predetermined value during the engine automatic stop; shift the automatic transmission into a neutral state when the oil pressure in the automatic transmission becomes lower than a predetermined value during the engine automatic stop; restarts the engine; and then, shift the automatic transmission into a drive state after the oil pressure in the automatic transmission is increased to the predetermined value by the oil pump driven in synchronism with the engine.

Vehicle with automatic engine stop/restart function and automatic engine stop/restart system and method for vehicle

An engine () of a vehicle comprises an identification device () which verifies the identification code of an electronic key () using a wireless signal. The controller () executes an idle stop under predetermined stop conditions (S, S) and re-starts the engine () during the idle stop when any one of a plurality of restart conditions are satisfied. The restart conditions include a restart request from the driver of the vehicle (S, S). The controller () commands the identification device () to verify the identification code of the electronic key () when restart conditions are established which do not correspond to the restart request to the engine () of the driver during an idle stop. When the verification is unsuccessful, restarting of the engine () is prohibited and thus it is possible to prevent restarting the engine () when the driver is not present.

Engine control for vehicle using electronic key system

Automatic stop/restart device of vehicle engine

Growing community of inventors

Yokohama, Japan

Taiichi Onoyama