INTERNAL COMBUSTION ENGINE FOR VEHICLE

• Main Author: HAYASHI KENJI
• Format: Patent
• Language: English; Japanese
• Published: 16.03.2015
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To shorten compressor stop time in a case where a compressor of an air conditioner is stopped to restore a negative pressure, when a brake negative pressure drops to a limit value or less in idling rotation state.SOLUTION: When braking becomes off under a condition where an intake negative pressure P is less than a reference value P2, an air conditioner is cut, and at the same time, an intake amount is throttled to a provisional air amount Q2 which is less than a normally required air amount Q0 and more than an absolute air amount which is required for combustion. Thus, an intake negative pressure can be quickly recovered. When the intake negative pressure reaches a required negative pressure P0 or a throttling time of a provisional air amount Q3 reaches a limit time T2, a required air amount is supplied by increasing an open degree of a throttle valve 11. When the intake negative pressure P reaches the required negative pressure P0, the open degree of the throttle valve 11 is returned and driving of the air conditioner is resumed. 【課題】アイドル回転状態でブレーキ負圧が限度以下に低下した場合にエアコンのコンプレッサを停止して負圧を回復させるにおいて、コンプレッサ停止時間を短縮する。【解決手段】吸気負圧Ｐが基準値Ｐ２より小さい状態でブレーキがオフになったら、エアコンをカットすると同時に、吸気量を、通常の必要空気量Ｑ０よりも少なくて燃焼に必要な絶対空気量よりは多い暫定空気量Ｑ２に絞る。これにより、吸気負圧を迅速に回復させることができる。吸気負圧が必要負圧Ｐ０に達するか、又は、暫定空気量Ｑ３の絞り時間が制限時間Ｔ２に至ったら、スロットルバルブ１１の開度を大きくして必要空気量を供給し、吸気負圧Ｐが必要負圧Ｐ０に至ったらスロットルバルブ１１の開度を戻すと共にエアコンの駆動を再開する。【選択図】図２