Oil pump for vehicle and vehicle with the same
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
InventorsTatsuo Obata, Hiromichi Kimura, Takeshi Kuwahara, Katsuhide Kitagawa, Kunio Morisawa, Masamitsu Seno, Hirotaka Yata, Tomoo Atarashi
Life of this patent
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Abstract
An oil pump for a vehicle includes a driven gear, a drive gear, a pump body, and a plate. The drive gear engages the driven gear. The pump body is secured to a rear cover of a transaxle case. The plate is interposed between the rear cover and the pump body. A pump chamber is formed between the rear cover and the pump body. The driven gear and the drive gear are housed in the pump chamber. The pump chamber is formed: between the plate and the pump body, or between the plate and the rear cover.
Claims11
An oil pump for a vehicle, comprising:
- a driven gear;
- a drive gear that engages the driven gear;
- a pump body secured to a rear cover of a transaxle case;
- a plate interposed between the rear cover and the pump body, wherein the pump body is disposed at a first side of the plate, and the rear cover is disposed at a second side of the plate that is opposite to the first side of the plate;
- a pump chamber formed between the plate and the pump body, wherein the driven gear and the drive gear are housed in the pump chamber, and
- an oil passage between the rear cover and the pump second side of the plate;
- and
- a relief valve comprising a valve element, a valve chamber, and a spring,
- wherein:
- the valve chamber houses the valve element and is formed between the first side of the plate and the pump body;
- the spring is housed in the valve chamber and biases the valve element in a valve closing direction;
- the plate includes a through hole extending from the valve chamber to the oil passage, the through hole being closed by seating of the valve element on the first side of the plate, and the valve element covering the through hole;
- and
- the oil passage communicates with an oil passage formed in the pump body when the relief valve opens.
A vehicle comprising:
- a rear cover of a transaxle case;
- an oil pump comprising a driven gear, a drive gear, a pump body, and a plate, wherein the plate has a first side and a second side that is opposite to the first side;
- an oil passage between the rear cover and the second side of the plate;
- and
- a relief valve comprising a valve element, a valve chamber, and a spring,
- wherein:
- the valve chamber houses the valve element and is formed between the first side of the plate and the pump body;
- the spring is housed in the valve chamber and biases the valve element in a valve closing direction;
- the plate includes a through hole extending from the valve chamber to the oil passage, the through hole being closed by seating of the valve element on the first side of the plate and the valve element covering the through hole;
- the drive gear engages the driven gear;
- the pump body is secured to the rear cover;
- a pump chamber is formed between the plate and the pump body;
- the driven gear and the drive gear are housed in the pump chamber;
- and
- the plate is interposed between the rear cover and the pump body.
Dependencies are inferred from the claim text.